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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Central Africa
-
Congo (1)
-
-
Nile Valley (1)
-
North Africa
-
Algeria (1)
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Atlas Mountains
-
Moroccan Atlas Mountains (1)
-
-
Egypt
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Kharga Oasis (1)
-
Safaga Egypt (1)
-
-
Morocco
-
Moroccan Atlas Mountains (1)
-
-
Tunisia (4)
-
-
Sahara (1)
-
Southern Africa
-
Namaqualand (1)
-
Namibia (1)
-
South Africa
-
Cape Province region (1)
-
KwaZulu-Natal South Africa
-
Durban South Africa (1)
-
-
Western Cape Province South Africa
-
Langebaanweg South Africa (1)
-
-
-
-
West Africa
-
Burkina Faso (2)
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Mali (1)
-
Taoudenni Basin (1)
-
-
-
Arctic Ocean
-
Beaufort Sea (1)
-
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Arctic region
-
Svalbard
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Spitsbergen (1)
-
-
-
Asia
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Altai Russian Federation (1)
-
Altai-Sayan region (2)
-
Arabian Peninsula
-
Saudi Arabia (2)
-
-
Baikal region (1)
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Central Asia
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Kazakhstan
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Karatau Range (2)
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-
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Far East
-
China
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Guizhou China (3)
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Hubei China (1)
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Hunan China (2)
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Sichuan Basin (1)
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Sichuan China (1)
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South China Block (1)
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Yangtze Platform (2)
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Yangtze River valley (1)
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Yunnan China (5)
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Mongolia
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Khubsugul Mongolia (2)
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Himalayas
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Garhwal Himalayas (1)
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Lesser Himalayas (3)
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Indian Peninsula
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India
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Andhra Pradesh India
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Kurnool India (2)
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Bundelkhand (2)
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Himachal Pradesh India (1)
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Madhya Pradesh India
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Jhabua India (2)
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Orissa India (1)
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Rajasthan India
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Aravalli Range (1)
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Barmer India (1)
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Udaipur India (2)
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Tamil Nadu India
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Chennai India (1)
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Uttar Pradesh India (6)
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Uttarakhand India
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Dehradun India
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Mussoorie India (2)
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Garhwal Himalayas (1)
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Nepal (1)
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Pakistan (1)
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Irkutsk Russian Federation (1)
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Kemerovo Russian Federation (1)
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Khakasiya Russian Federation (1)
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Krasnoyarsk Russian Federation (1)
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Middle East
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Dead Sea Rift (1)
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Iran (1)
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Iraq (2)
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Israel
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Negev (6)
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Jordan (6)
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Samaria (1)
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Syria
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Palmyrides (2)
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Novosibirsk Russian Federation (1)
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Omsk Russian Federation (1)
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Patom Plateau (1)
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Sayan
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Eastern Sayan (1)
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Siberia (4)
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Siberian fold belt (2)
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Siberian Platform
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Aldan Shield (1)
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Anabar Shield (1)
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Tien Shan
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Karatau Range (2)
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Tomsk Russian Federation (2)
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Tuva Russian Federation
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Sangilen Mountains (1)
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Tyumen Russian Federation
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Khanty-Mansi Russian Federation (1)
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Yamal-Nenets Russian Federation (2)
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West Siberia (3)
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Yakutia Russian Federation
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Atlantic Ocean
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North Atlantic
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Caribbean Sea
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Aves Ridge (1)
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Northwest Atlantic (2)
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South Atlantic
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Southeast Atlantic (2)
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Australasia
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Australia
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South Australia
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Western Australia (1)
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Canada
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Eastern Canada
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Ontario
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Lanark County Ontario
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Perth Ontario (1)
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Western Canada
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British Columbia (1)
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-
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Caribbean region
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West Indies
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Antilles
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Greater Antilles
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Puerto Rico (1)
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Lesser Antilles
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Aruba (1)
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Netherlands Antilles (1)
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-
-
-
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Commonwealth of Independent States
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Kazakhstan
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Karatau Range (2)
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Russian Federation
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Altai Russian Federation (1)
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Baikal region (1)
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Irkutsk Russian Federation (1)
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Karelia Russian Federation (1)
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Kemerovo Russian Federation (1)
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Khakasiya Russian Federation (1)
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Krasnoyarsk Russian Federation (1)
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Kursk Russian Federation (1)
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Lake Baikal (1)
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Novosibirsk Russian Federation (1)
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Omsk Russian Federation (1)
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Patom Plateau (1)
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Polar Urals (1)
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Siberian Platform
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Aldan Shield (1)
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Anabar Shield (1)
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Tomsk Russian Federation (2)
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Tuva Russian Federation
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Sangilen Mountains (1)
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Tyumen Russian Federation
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Khanty-Mansi Russian Federation (1)
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Yamal-Nenets Russian Federation (2)
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Voronezh Russian Federation (1)
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Yakutia Russian Federation
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Anabar Shield (1)
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Urals
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West Siberia (3)
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East Pacific Ocean Islands (1)
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Eurasia (1)
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Central Europe
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Hungary
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Poland
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Southern Europe
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Iberian Peninsula
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Western Europe
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Belgium (1)
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France
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Provence (1)
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Vaucluse France (1)
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Scandinavia
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Sweden
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Skane (1)
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United Kingdom
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Great Britain
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England
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Cornwall England (1)
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East Anglia
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Suffolk England (1)
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Essex England (1)
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-
Scotland
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Highland region Scotland (1)
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Wales (1)
-
-
-
-
-
Indian Ocean
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Agulhas Bank (2)
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West Indian Ocean (1)
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Mediterranean Sea
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East Mediterranean (2)
-
-
Mexico
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Baja California (2)
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Baja California Sur Mexico (1)
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Durango Mexico (1)
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Zacatecas Mexico (1)
-
-
North America
-
Appalachian Basin (1)
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Appalachians
-
Southern Appalachians (1)
-
-
Basin and Range Province
-
Great Basin (2)
-
-
Canadian Shield
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Churchill Province
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Cape Smith fold belt (1)
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-
-
Gulf Coastal Plain (1)
-
Rocky Mountains
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U. S. Rocky Mountains (1)
-
-
Western Canada Sedimentary Basin (1)
-
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North Slope (2)
-
Oceania
-
Micronesia
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Nauru Island (1)
-
-
Polynesia
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French Polynesia
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Tuamotu Islands (1)
-
-
-
-
Pacific Coast (1)
-
Pacific Ocean
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East Pacific
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Northeast Pacific (1)
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Peru-Chile Trench (1)
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Southeast Pacific (1)
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Equatorial Pacific (1)
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North Pacific
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Northeast Pacific (1)
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-
South Pacific
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Southeast Pacific (1)
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Southwest Pacific
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Coral Sea
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Great Barrier Reef (1)
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Lord Howe Rise (1)
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-
-
West Pacific
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Southwest Pacific
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Coral Sea
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Great Barrier Reef (1)
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Lord Howe Rise (1)
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Red Sea region (1)
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Russian Platform (2)
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Santa Maria Basin (1)
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Shark Bay (1)
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South America
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Brazil
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Bahia Brazil (1)
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Minas Gerais Brazil (1)
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Sao Francisco Craton (1)
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Chile (3)
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Peru (5)
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Venezuela
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Maracaibo Basin (1)
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Zulia Venezuela (1)
-
-
-
United States
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Alaska
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Brooks Range (3)
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National Petroleum Reserve Alaska (1)
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Prudhoe Bay (2)
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Prudhoe Bay Field (2)
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Arkoma Basin (1)
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Atlantic Coastal Plain (8)
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California
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Orange County California (1)
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San Luis Obispo County California
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Pismo Basin (1)
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Santa Barbara County California (1)
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Southern California (1)
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Eastern U.S.
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Southeastern U.S. (3)
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Florida
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Clay County Florida (1)
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Duval County Florida (1)
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Flagler County Florida (1)
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Okeechobee County Florida (1)
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Putnam County Florida (1)
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Saint Johns County Florida (2)
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Georgia (1)
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Great Basin (2)
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Idaho
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Owyhee County Idaho (1)
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Illinois Basin (1)
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Indiana
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Greene County Indiana (1)
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Sullivan County Indiana (1)
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Iowa (1)
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Maine (1)
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Midcontinent (1)
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Minnesota (1)
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Montana (1)
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Nashville Dome (1)
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New Mexico (1)
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New York (1)
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North Carolina
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Beaufort County North Carolina (2)
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Carteret County North Carolina
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Beaufort North Carolina (1)
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Onslow Bay (4)
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Pungo River (1)
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-
Ohio (1)
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Oklahoma (1)
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Tennessee (1)
-
Texas
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Fort Worth Basin (1)
-
-
U. S. Rocky Mountains (1)
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Utah
-
Box Elder County Utah (1)
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Millard County Utah (1)
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Salt Lake County Utah
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Salt Lake City Utah (1)
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Tooele County Utah (1)
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Western U.S. (3)
-
Wyoming
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Sweetwater County Wyoming (1)
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USSR (2)
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Western Desert (2)
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commodities
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barite deposits (1)
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bitumens (1)
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brines (1)
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construction materials
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cement materials (1)
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fluorspar deposits (1)
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graphite deposits (1)
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metal ores
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base metals (1)
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gold ores (1)
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iron ores (4)
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lead-zinc deposits (1)
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manganese ores (3)
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nickel ores (1)
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platinum ores (1)
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mineral deposits, genesis (40)
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mineral exploration (13)
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petroleum
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phosphate deposits (47)
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placers (1)
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water resources (1)
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elements, isotopes
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boron (1)
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carbon
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C-13/C-12 (21)
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organic carbon (5)
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halogens
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fluorine
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fluoride ion (1)
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isotope ratios (23)
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isotopes
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radioactive isotopes
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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stable isotopes
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C-13/C-12 (21)
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Cr-53/Cr-52 (1)
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N-15/N-14 (1)
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Nd-144/Nd-143 (2)
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O-17/O-16 (1)
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O-18/O-16 (14)
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Os-188/Os-187 (1)
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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S-34/S-32 (3)
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Sr-87/Sr-86 (6)
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metals
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alkaline earth metals
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strontium
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Sr-87/Sr-86 (6)
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aluminum (1)
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arsenic (1)
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cadmium (1)
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chromium
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Cr-53/Cr-52 (1)
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iron
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ferric iron (1)
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lead
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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manganese (3)
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molybdenum (2)
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platinum group
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osmium
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Os-188/Os-187 (1)
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platinum ores (1)
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precious metals (2)
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rare earths
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cerium (1)
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neodymium
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Nd-144/Nd-143 (2)
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titanium (1)
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vanadium (3)
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zinc (2)
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nitrogen
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N-15/N-14 (1)
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oxygen
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O-17/O-16 (1)
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O-18/O-16 (14)
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phosphorus (17)
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sulfur
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S-34/S-32 (3)
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fossils
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Bacillus (1)
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burrows (3)
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Chordata
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Vertebrata
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Pisces
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Osteichthyes
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Actinopterygii
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Teleostei (1)
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-
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Tetrapoda
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Reptilia
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Diapsida
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Lepidosauria
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Squamata
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Lacertilia
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Mosasauridae (1)
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-
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-
-
-
coprolites (3)
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cyanobacteria (3)
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eukaryotes (1)
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ichnofossils
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Skolithos (1)
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Invertebrata
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Archaeocyatha (1)
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Arthropoda
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Mandibulata
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Crustacea
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Ostracoda (1)
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-
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Trilobitomorpha
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Trilobita (2)
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-
-
Brachiopoda (3)
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Bryozoa (1)
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Cnidaria
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Anthozoa (3)
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Echinodermata
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Crinozoa
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Crinoidea (1)
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-
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Mollusca
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Bivalvia
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Ostreoidea
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Ostreidae (1)
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Pterioida
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Pteriina
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Inocerami
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Inoceramidae
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Inoceramus (1)
-
-
-
-
-
-
Cephalopoda
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Ammonoidea
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Ammonites (1)
-
-
-
-
Porifera
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Demospongea (2)
-
Hexactinellida (2)
-
-
Protista
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Foraminifera
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Rotaliina
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Buliminacea (1)
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Globigerinacea
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Globigerinidae
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Globigerina (1)
-
-
-
Rotaliacea
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Nummulitidae
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Nummulites (1)
-
-
-
-
Textulariina
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Ammodiscacea
-
Ammodiscidae (1)
-
-
Lituolacea
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Trochammina (1)
-
-
-
-
Radiolaria (2)
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Silicoflagellata (1)
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Vermes (1)
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-
Metazoa (2)
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microfossils
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Conodonta (2)
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problematic microfossils (1)
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palynomorphs
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acritarchs (3)
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Dinoflagellata (1)
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Plantae
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algae
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Coccolithophoraceae (1)
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diatoms (2)
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nannofossils
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Discoasteridae (1)
-
-
-
-
problematic fossils
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problematic microfossils (1)
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prokaryotes (1)
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thallophytes (3)
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trails (1)
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geochronology methods
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geologic age
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Cenozoic
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Glenns Ferry Formation (1)
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Quaternary
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upper Holocene (1)
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Pleistocene (2)
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Tertiary
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lower Tertiary (1)
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Bone Valley Formation (1)
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Capistrano Formation (1)
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Miocene
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lower Miocene
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Burdigalian (1)
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middle Miocene (1)
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Pungo River Formation (5)
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Pliocene
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middle Pliocene (1)
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Paleogene
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Eocene
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Green River Formation (1)
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Lake Gosiute (1)
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lower Eocene
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Ypresian
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London Clay (1)
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middle Eocene
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Bartonian (1)
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Wilkins Peak Member (1)
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Oligocene
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upper Oligocene (1)
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Paleocene
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lower Paleocene
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Danian (1)
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upper Paleocene (1)
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Dalradian (1)
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Mesozoic
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Cretaceous
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Hue Shale (1)
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Logan Canyon Formation (1)
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Albian (3)
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Campanian
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upper Campanian (1)
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Cenomanian (3)
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Marca Shale Member (1)
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Moreno Formation (1)
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Jurassic
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Lower Jurassic
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Portlandian (1)
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-
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Triassic
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Lower Triassic
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Dinwoody Formation (1)
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Shublik Formation (3)
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Upper Triassic
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Norian (2)
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Sag River Sandstone (1)
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-
-
upper Mesozoic (1)
-
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Paleozoic
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Cambrian
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Lower Cambrian
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Tommotian (3)
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Middle Cambrian (6)
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Carboniferous
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Mississippian
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Lower Mississippian
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Upper Mississippian
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
phosphate rocks
Earth Observation Data Utilisation for Rock Phosphate Exploration in Jhabua, Madhya Pradesh, India Available to Purchase
Analysis of Typical Rock Physical Characteristics, Mechanical Properties, and Failure Modes of the Laoheba Phosphate Mining Area in the Sichuan Basin, China Open Access
The need for joined-up thinking in critical raw materials research Available to Purchase
Chromium isotopes track redox fluctuations in Proterozoic successions of the Chapada Diamantina, São Francisco craton, Brazil Available to Purchase
Biosiliceous, organic-rich, and phosphatic facies of Triassic strata of northwest Alaska: Transect across a high-latitude, low-angle continental margin Available to Purchase
ABSTRACT The Shublik Formation (Middle and Upper Triassic) is a mixed siliciclastic-carbonate-phosphatic unit in northern Alaska. It generated oil found in Prudhoe Bay and other accumulations and is a prospective self-sourced resource play on Alaska’s North Slope. Its distal, deeper-water equivalent—the Otuk Formation—consists largely of radiolarian chert, mudstone, and limestone and contains potential gas accumulations in the Brooks Range foothills to the south. New petrographic, fossil, geochemical, spectral gamma-ray, and zircon U-Pb data yield insights into facies changes in these units, which were deposited across a shallowly dipping shelf margin in a high-latitude setting. Samples come from four localities along a transect that extends ~410 km from present-day northeast (proximal) to southwest (distal) in northwest Alaska. Proximal Shublik facies (Brontosaurus 1 well) contain abundant siliciclastic detritus and local phosphate. Shublik-Otuk transitional facies occur in the probable onshore extension of the Hanna Trough (Surprise Creek); new zircon U-Pb data indicate an early Norian age for a bentonite bed in this section. Distal Otuk facies (Red Dog district, Cape Lisburne) are fine grained, biosiliceous, and organic rich. New detrital zircon U-Pb data from a distinctive sandstone member in the Otuk Formation at Cape Lisburne reinforce previous interpretations of a provenance to the present-day northwest and indicate a protracted history of Triassic magmatism for this source area. Triassic facies patterns in northwestern Alaska were shaped by sea-level change, climate, and regional tectonism. Organic-rich facies developed best at times (Ladinian–middle Norian) and/or in settings (distal shelf, Hanna Trough) with minimal dilution of organic matter by other detritus.
Evaluating the Risk of Roof Fall in Phosphate Mines: Case Study of the Shanshuya Phosphate Mine in China Open Access
Factors Controlling the Distribution of Agglutinated Foraminiferal Morphogroups as Palaeoenvironmental Tracers in the Kharga Oasis, Egypt Available to Purchase
Revisiting the phosphorite deposit of Fontanarejo (central Spain): new window into the early Cambrian evolution of sponges and the microbial origin of phosphorites Open Access
Nd isotope composition of the Ediacaran and earliest Cambrian phosphorite nodules and Fe sulphide from the East European Platform Available to Purchase
A lateral well in the Shublik Formation, Alaska North Slope, with implications for unconventional resource potential Available to Purchase
Mössbauer Spectroscopic Study of Phosphatic Sediments Collected from Fatehgarh Formation of Northern Barmer Basin, Western Rajasthan Available to Purchase
Introduction to the thematic collection ‘Apennines-Tyrrhenian system’ Available to Purchase
Possibility of Mixed Origin of Rare Earth Elements in Sedimentary Marine Apatites: A Case Study from Phosphorites in the Cretaceous (Campanian-Maastrichtian) Duwi Formation, Abu-Tartur Plateau, Egypt Available to Purchase
Enhanced upwelling and phosphorite formation in the northeastern Pacific during the late Oligocene: Depositional mechanisms, environmental conditions, and the impact of glacio-eustacy Available to Purchase
The determination of phosphate in rocks and iron ores using inductively coupled plasma with optical emission spectroscopy (ICP-OES) Available to Purchase
Biochemical And Stratigraphic Controls on Pore‐System Evolution, Phosphoria Rock Complex (Permian), Rocky Mountain Region, USA Available to Purchase
Pore systems in the Middle Permian Phosphoria Rock Complex (PRC), Rocky Mountain Region, USA, evolved with biotic and chemical dynamics in a shallow epicontinental seaway undergoing extreme environmental shifts. Biochemical responses to environmental changes directly affected pore systems and controlled diagenetic pathways through burial. Petrographic methods and spatially resolved measurements of δ 18 O in sequence stratigraphic context allow characterization of pore systems and their evolution in heterogenous biochemical sediments. Pore systems vary regionally and across systems tracts on second-order (9–10 million years [MY]) and third-order (2–5 MY) timescales. Minimal porosity occurs in transgressive mudrocks rich in organic matter (OM), phosphorites, and carbonates. Cool, acidic, low-oxygen, nutrient-rich basinal waters interacted with warm open to restricted shelfal waters in transgressions. This resulted in accumulation and microbial decay of S-rich OM, phosphatization, carbonate precipitation, silicification, as well as deposition of calcitic-biotic debris (bryozoans, brachiopods, and crinoids) and micrite. Relative to landward and highstand marine components, transgressive basinal marine carbonates and silica are δ 18 O depleted due to microbial decay of OM. Extensive cementation coupled with near-surface compaction and recrystallization of micrite occluded large portions of porosity in transgressive phosphorites and carbonates. Porosity in these rocks is dominated by interparticle and, to a lesser degree, intraparticle microporosity in microbored phosphatized and micritized grains. Phosphorites are compacted where cements are not pervasive. OM-rich sediments host minimal volumes of interparticle nanoporosity due to mechanical compaction and incursion of secondary OM (bitumen) during burial. PRC OM is S-rich, due to sulfate-reducing bacterial enrichment, and locally abundant. This drove early generation of secondary OM and inhibited OM-hosted porosity development through thermal maturation. Large volumes of porosity accumulated in highstand sediments and varied with transitions from silicisponge spicule cherts and calcitic-biota carbonates to pervasively dolomitized micritic, peloidal, aragonitic mollusk, and peritidal microbial sediments. These biochemical transitions, and ultimately pore-system evolution, were driven by interaction between oxygenated open marine waters, eolian siliciclastic debris, and increasingly restricted shelfal waters. Marine carbonate and silica δ 18 O are consistent with Middle Permian open marine waters but are enriched landward and through highstands with evaporative fractionation. This δ 18 O-enriched authigenic silica in carbonates and evaporite replacements, as well as δ 18 O enrichment through silica precipitation, suggest dolomitization and silicification were driven by evaporitic processes. In spiculitic cherts and siltstones, silicification and carbonate diagenesis resulted in small volumes of intraparticle, interparticle, and moldic porosity, as well as increased susceptibility to fracturing and associated permeability enhancement. Chalcedony in spiculites and silicified carbonates host minor volumes of porosity where moganite crystallites dissolved during hydrocarbon migration. Highstand dolomites host abundant intercrystalline, moldic, fenestral, and interparticle macroporosity and microporosity, especially in peloidal wackestones, mollusk debris, ooid grainstones, and peritidal microbialites. Dolomitization resulted in dissolution of aragonitic mollusk and ooids, cementation, and preservation of primary porosity. Porosity loss through burial in dolomites occurs through mechanical compaction, and to a lesser degree, precipitation of zoned carbonate cements that are δ 18 O depleted relative to earlier dolomite. Compaction strongly decreases intercrystalline porosity in dolomitized peloidal wackestones. Secondary OM related to hydrocarbon migration coats surfaces and fills small pore volumes, inhibiting burial cementation.