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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
East Africa
-
Tanzania
-
Oldoinyo Lengai (1)
-
-
-
North Africa
-
Libya
-
Sirte Basin (1)
-
-
-
Southern Africa
-
Karoo Basin (1)
-
Namibia (1)
-
South Africa
-
Free State South Africa
-
Vredefort Dome (2)
-
-
Witwatersrand (1)
-
-
Zimbabwe (1)
-
-
West Africa
-
Ghana (2)
-
-
-
Antarctica
-
Antarctic Peninsula (1)
-
-
Arctic Ocean
-
Barents Sea (1)
-
Chukchi Sea (1)
-
Fram Strait (1)
-
Lomonosov Ridge (1)
-
Norwegian Sea (1)
-
-
Asia
-
Arabian Peninsula
-
Oman (1)
-
-
Baikal rift zone (1)
-
Central Asia
-
Kazakhstan
-
Kokchetav Kazakhstan
-
Kokchetav Massif (1)
-
-
-
-
Far East
-
China
-
Hubei China (1)
-
Xinjiang China
-
Hami Basin (1)
-
Turpan Basin (1)
-
-
Xizang China (1)
-
-
-
Himalayas (1)
-
Indian Peninsula
-
India
-
Singhbhum shear zone (1)
-
-
-
Indus-Yarlung Zangbo suture zone (1)
-
Khamar-Daban Range (1)
-
Qiangtang Terrane (1)
-
Sayan
-
Eastern Sayan (1)
-
-
Siberian Platform (1)
-
Tibetan Plateau (2)
-
-
Atlantic Ocean
-
Mid-Atlantic Ridge (1)
-
North Atlantic
-
Bay of Biscay (1)
-
Bay of Fundy (1)
-
Gulf of Mexico
-
Campeche Scarp (1)
-
Garden Banks (1)
-
-
Hudson Strait (1)
-
Labrador Sea (1)
-
North Sea (2)
-
Northeast Atlantic (2)
-
-
-
Atlantic Ocean Islands
-
Azores
-
Terceira Island (2)
-
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Shetland Islands (1)
-
-
Australasia
-
Australia
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Northern Territory Australia
-
Pine Creek Geosyncline (1)
-
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Western Australia
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Yilgarn (1)
-
-
-
-
Canada
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Eastern Canada
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Maritime Provinces
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New Brunswick (1)
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Nova Scotia (1)
-
-
Newfoundland and Labrador
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Newfoundland (1)
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Ontario (1)
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Quebec
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Matagami (1)
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Western Canada
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Athabasca Basin (1)
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British Columbia
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Vancouver British Columbia (1)
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Manitoba (1)
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Saskatchewan (1)
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Caribbean region
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West Indies
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Cayman Islands
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Grand Cayman Island (1)
-
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Cascade Range (1)
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Cascadia subduction zone (1)
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Chicxulub Crater (1)
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Commonwealth of Independent States
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Kazakhstan
-
Kokchetav Kazakhstan
-
Kokchetav Massif (1)
-
-
-
Russian Federation
-
Baikal rift zone (1)
-
Khamar-Daban Range (1)
-
Murmansk Russian Federation
-
Kovdor Massif (1)
-
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Siberian Platform (1)
-
-
-
East Pacific Ocean Islands
-
Hawaii
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Hawaii County Hawaii
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Hawaii Island
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Kilauea (1)
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-
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Maui County Hawaii
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Maui (1)
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-
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Europe
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Alps
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Central Alps
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Rhaetian Alps
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Adamello Massif (1)
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Central Europe
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Austria
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Salzburg State Austria
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Salzburg Austria (1)
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Germany
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Baden-Wurttemberg Germany
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Katzenbuckel (1)
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North Rhine-Westphalia Germany
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Rhineland-Palatinate Germany (1)
-
-
Switzerland
-
Zurich Switzerland (1)
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Murmansk Russian Federation
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Kovdor Massif (1)
-
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Rhenish Schiefergebirge
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Eifel (1)
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Southern Europe
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Greece
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Greek Aegean Islands
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Cyclades (2)
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Iberian Peninsula
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Portugal (1)
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Spain
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Andalusia Spain
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Basque Provinces Spain
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Alava Spain (1)
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Galicia Spain
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La Coruna Spain
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Cabo Ortegal (1)
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-
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-
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Italy
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Apulia Italy
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Brindisi Italy (1)
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Lombardy Italy
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Adamello Massif (1)
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Piemonte Italy
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Sesia Zone (1)
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Trentino-Alto Adige Italy
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Alto Adige (1)
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Bolzano Italy (1)
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Western Europe
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France
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Armorican Massif (1)
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Ireland (2)
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Scandinavia
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Norway
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Bergen Norway (1)
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United Kingdom
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Great Britain
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Scotland
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Aberdeenshire Scotland
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Aberdeen Scotland (1)
-
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Shetland Islands (1)
-
-
-
-
-
-
Green Canyon (1)
-
Mediterranean region
-
Aegean Islands
-
Greek Aegean Islands
-
Cyclades (2)
-
-
-
-
Mediterranean Sea
-
East Mediterranean
-
Adriatic Sea (1)
-
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West Mediterranean
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Tyrrhenian Sea (1)
-
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Mexico
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Jalisco Block (1)
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North America
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Appalachians
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Blue Ridge Mountains (1)
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Southern Appalachians (1)
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Canadian Shield
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Superior Province (1)
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Gulf Coastal Plain (1)
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Strait of Georgia (1)
-
-
Oceania
-
Polynesia
-
Hawaii
-
Hawaii County Hawaii
-
Hawaii Island
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Kilauea (1)
-
-
-
Maui County Hawaii
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Maui (1)
-
-
-
-
-
Pacific Ocean
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East Pacific
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Northeast Pacific (1)
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North Pacific
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Northeast Pacific (1)
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-
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Sierra Nevada (1)
-
South America
-
Brazil
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Minas Gerais Brazil
-
Ouro Preto Brazil (1)
-
-
-
-
Southern Ocean
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Bransfield Strait (1)
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Storegga Slide (1)
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United States
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Alabama (1)
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Arizona
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Coconino County Arizona (1)
-
Yavapai County Arizona (1)
-
-
Arkansas (1)
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Blue Ridge Mountains (1)
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California
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El Dorado County California (1)
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Mono County California (1)
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Placer County California (1)
-
Santa Clara County California (1)
-
-
Delaware
-
New Castle County Delaware (1)
-
-
Hawaii
-
Hawaii County Hawaii
-
Hawaii Island
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Kilauea (1)
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-
-
Maui County Hawaii
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Maui (1)
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-
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Illinois (1)
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Iowa
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Keokuk County Iowa (1)
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Kentucky (1)
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Lake Tahoe (1)
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Louisiana (2)
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Mississippi (1)
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Nevada
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Nye County Nevada
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Pahute Mesa (1)
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Washoe County Nevada (1)
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New Jersey
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Sussex County New Jersey (1)
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New Madrid region (1)
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New York (1)
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Ohio (1)
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Oklahoma (1)
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Pennsylvania (1)
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South Carolina
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Tennessee (1)
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Texas (1)
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Virginia
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Washington
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Skamania County Washington
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Mount Saint Helens (1)
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West Virginia (1)
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Western U.S. (1)
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commodities
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cobalt ores (1)
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lead ores (1)
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platinum ores (1)
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uranium ores (2)
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zinc ores (1)
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mineral deposits, genesis (2)
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mineral exploration (1)
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oil and gas fields (1)
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petroleum
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natural gas (2)
-
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (3)
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C-14 (3)
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hydrogen
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D/H (1)
-
-
isotope ratios (6)
-
isotopes
-
radioactive isotopes
-
C-14 (3)
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U-238/Pb-206 (1)
-
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stable isotopes
-
C-13/C-12 (3)
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D/H (1)
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O-18/O-16 (4)
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Os-188/Os-187 (1)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-206 (1)
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U-238/Pb-206 (1)
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Lu/Hf (1)
-
metals
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uranium
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alkaline earth metals
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barium (1)
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magnesium (1)
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bismuth (1)
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cobalt (1)
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copper (3)
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gold (2)
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hafnium (1)
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iron (2)
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lead
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Pb-207/Pb-206 (1)
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Pb-208/Pb-206 (1)
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U-238/Pb-206 (1)
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niobium (1)
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platinum group
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iridium (1)
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osmium
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palladium (1)
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platinum ores (1)
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rare earths
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samarium (1)
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yttrium (2)
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tantalum (1)
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titanium (2)
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zinc (1)
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zirconium (1)
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oxygen
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O-18/O-16 (4)
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sulfur (4)
-
-
fossils
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fungi (1)
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Invertebrata
-
Arthropoda
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Mandibulata
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Crustacea
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Ostracoda (1)
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Insecta (1)
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-
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Brachiopoda
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Articulata
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Terebratulida (1)
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Cnidaria
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Anthozoa (1)
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Scyphozoa
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Conulariida (1)
-
-
-
Mollusca
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Bivalvia
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Mytilus
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Mytilus edulis (1)
-
-
-
-
Protista
-
Foraminifera
-
Rotaliina
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Buliminacea
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Bolivinitidae
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Bolivina (1)
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-
-
-
Textulariina (1)
-
-
-
-
microfossils (5)
-
Plantae
-
algae
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Coccolithophoraceae
-
Coccolithus (1)
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diatoms (1)
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Rhodophyta (1)
-
-
-
-
geochronology methods
-
(U-Th)/He (2)
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Ar/Ar (4)
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K/Ar (1)
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Lu/Hf (1)
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paleomagnetism (1)
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Pb/Pb (1)
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radiation damage (1)
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Th/U (1)
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thermochronology (1)
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U/Pb (8)
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U/Th/Pb (3)
-
-
geologic age
-
Cenozoic
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Quaternary
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Holocene
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lower Holocene (1)
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upper Holocene (1)
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Pleistocene (1)
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Tertiary
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Neogene
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Miocene (3)
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-
Paleogene
-
Eocene
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middle Eocene (1)
-
-
Paleocene
-
lower Paleocene
-
K-T boundary (1)
-
-
-
-
-
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous (2)
-
Upper Cretaceous
-
K-T boundary (1)
-
-
-
Jurassic
-
Aztec Sandstone (1)
-
Upper Jurassic
-
Haynesville Formation (1)
-
Kimmeridge Clay (1)
-
-
-
Triassic
-
Upper Triassic
-
Norian (1)
-
-
-
-
Paleozoic
-
Cambrian (1)
-
Carboniferous
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Upper Carboniferous (1)
-
-
lower Paleozoic
-
Wilmington Complex (1)
-
-
Ordovician (3)
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Silurian (1)
-
Wissahickon Formation (1)
-
Woodford Shale (1)
-
-
Precambrian
-
Archean (3)
-
upper Precambrian
-
Proterozoic
-
Algonkian
-
Baraboo Quartzite (1)
-
-
Mesoproterozoic (3)
-
Neoproterozoic (1)
-
Paleoproterozoic (2)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
carbonatites (1)
-
plutonic rocks
-
granites
-
A-type granites (1)
-
biotite granite (1)
-
leucogranite (1)
-
S-type granites (1)
-
-
granodiorites (2)
-
pegmatite (1)
-
syenites
-
alkali syenites (1)
-
-
ultramafics
-
chromitite (1)
-
-
-
volcanic rocks
-
basalts
-
olivine tholeiite (1)
-
tholeiitic basalt (1)
-
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dacites (2)
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glasses (3)
-
pyroclastics
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pumice (1)
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rhyolite tuff (1)
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tuff (1)
-
welded tuff (1)
-
-
rhyolites
-
pantellerite (1)
-
-
-
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ophiolite (1)
-
volcanic ash (1)
-
-
metamorphic rocks
-
metamorphic rocks
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eclogite (3)
-
gneisses
-
granite gneiss (1)
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orthogneiss (1)
-
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granulites (2)
-
marbles (1)
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metaigneous rocks (1)
-
metasedimentary rocks
-
metagraywacke (1)
-
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metasomatic rocks (1)
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metavolcanic rocks (1)
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mylonites (4)
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quartzites (1)
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schists (1)
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ophiolite (1)
-
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minerals
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alloys (3)
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antimonides (1)
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arsenides (1)
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carbonates
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ankerite (1)
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aragonite (4)
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calcite (8)
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dolomite (3)
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siderite (2)
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halides
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fluorides
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fluorite (1)
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-
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hydrates (1)
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minerals (3)
-
native elements
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diamond (1)
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graphite (1)
-
-
organic minerals
-
amber (1)
-
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oxides
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baddeleyite (1)
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chromite (1)
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franklinite (1)
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hematite (2)
-
magnetite (1)
-
niobates (1)
-
tantalates
-
tantalite (1)
-
-
uraninite (2)
-
-
phosphates
-
apatite (1)
-
monazite (6)
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xenotime (4)
-
-
platinum minerals (1)
-
silicates
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aluminosilicates (1)
-
asbestos (1)
-
chain silicates
-
amphibole group (2)
-
pyroxene group
-
clinopyroxene (4)
-
-
rhodonite group
-
rhodonite (1)
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
K-feldspar (3)
-
-
plagioclase
-
labradorite (1)
-
oligoclase (1)
-
-
-
silica minerals
-
chalcedony (1)
-
quartz (8)
-
-
-
orthosilicates
-
nesosilicates
-
garnet group
-
almandine (1)
-
spessartine (1)
-
-
olivine group
-
forsterite (1)
-
olivine (3)
-
-
phenakite group
-
willemite (1)
-
-
zircon group
-
zircon (12)
-
-
-
sorosilicates
-
epidote group
-
zoisite (1)
-
-
-
-
ring silicates
-
tourmaline group
-
foitite (1)
-
-
-
sheet silicates
-
chlorite group
-
chlorite (2)
-
clinochlore (1)
-
-
clay minerals
-
kaolinite (1)
-
smectite (1)
-
-
mica group
-
biotite (2)
-
celadonite (1)
-
muscovite (2)
-
phengite (1)
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phlogopite (1)
-
-
serpentine group
-
serpentine (1)
-
-
-
-
sulfates
-
anhydrite (1)
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barite (1)
-
gypsum (1)
-
-
sulfides
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bornite (1)
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chalcopyrite (1)
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copper sulfides (1)
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iron sulfides (1)
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laurite (1)
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pentlandite (1)
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pyrite (1)
-
pyrrhotite (1)
-
sphalerite (1)
-
-
sulfosalts
-
sulfarsenites (1)
-
-
tungstates
-
scheelite (1)
-
-
uranium minerals (1)
-
-
Primary terms
-
absolute age (14)
-
Africa
-
East Africa
-
Tanzania
-
Oldoinyo Lengai (1)
-
-
-
North Africa
-
Libya
-
Sirte Basin (1)
-
-
-
Southern Africa
-
Karoo Basin (1)
-
Namibia (1)
-
South Africa
-
Free State South Africa
-
Vredefort Dome (2)
-
-
Witwatersrand (1)
-
-
Zimbabwe (1)
-
-
West Africa
-
Ghana (2)
-
-
-
Antarctica
-
Antarctic Peninsula (1)
-
-
Arctic Ocean
-
Barents Sea (1)
-
Chukchi Sea (1)
-
Fram Strait (1)
-
Lomonosov Ridge (1)
-
Norwegian Sea (1)
-
-
Asia
-
Arabian Peninsula
-
Oman (1)
-
-
Baikal rift zone (1)
-
Central Asia
-
Kazakhstan
-
Kokchetav Kazakhstan
-
Kokchetav Massif (1)
-
-
-
-
Far East
-
China
-
Hubei China (1)
-
Xinjiang China
-
Hami Basin (1)
-
Turpan Basin (1)
-
-
Xizang China (1)
-
-
-
Himalayas (1)
-
Indian Peninsula
-
India
-
Singhbhum shear zone (1)
-
-
-
Indus-Yarlung Zangbo suture zone (1)
-
Khamar-Daban Range (1)
-
Qiangtang Terrane (1)
-
Sayan
-
Eastern Sayan (1)
-
-
Siberian Platform (1)
-
Tibetan Plateau (2)
-
-
Atlantic Ocean
-
Mid-Atlantic Ridge (1)
-
North Atlantic
-
Bay of Biscay (1)
-
Bay of Fundy (1)
-
Gulf of Mexico
-
Campeche Scarp (1)
-
Garden Banks (1)
-
-
Hudson Strait (1)
-
Labrador Sea (1)
-
North Sea (2)
-
Northeast Atlantic (2)
-
-
-
Atlantic Ocean Islands
-
Azores
-
Terceira Island (2)
-
-
Shetland Islands (1)
-
-
atmosphere (1)
-
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backscattering
Tectonic setting of metamorphism and exhumation of eclogite-facies rocks in the South Beishan orogen, northwestern China
Kovdor to Oldoinyo Lengai—The missing link in carbonatitic magma evolution
Lithologic controls on microfracturing from legacy underground nuclear explosions
High-magnitude stresses induced by mineral-hydration reactions
Tibetan Plateau insights into >1100 °C crustal melting in the Quaternary
Crystal plasticity enhances trace element mobility in garnet
Origin of magmatic and tectonic fabrics in the Remal granite-gneiss, Singhbhum Craton, India
Numerical Study on the Characteristics of Abyssal T ‐Wave Envelopes Controlled by Earthquake Source Parameters
Ordovician–Silurian back-arc silicic magmatism in the southernmost Appalachians
Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea
Enhancing internal multiple prediction by using the inverse-scattering series: Methodology and field application
Internal multiple prediction using inverse-scattering series with sparsity promotion — Part 1: Background, analysis, and synthetic modeling
Scattering-based focusing for imaging in highly complex media from band-limited, multicomponent data
Anisotropic Born scattering for the qP scalar wavefield using a low-rank symbol approximation
ABSTRACT Finite deformation patterns of accessory phases can indicate the tectonic regime and deformation history of the host rocks and geological units. In this study, tectonically deformed, seismically deformed, and shocked zircon grains from a granite sample from the core of the Vredefort impact structure were analyzed in situ, using a combination of Raman spectroscopy, backscatter electron (BSE) imaging, electron backscattered diffraction (EBSD) mapping, electron probe microanalyses (EPMA), energy-dispersive X-ray spectroscopy (EDS) qualitative chemical mapping, and cathodoluminescence (CL) imaging. We aimed to reveal the effects of marginal grain-size reduction, planar deformation bands (PDBs), and shock microtwins on the crystal structure and microchemistry of zircon. Deformation patterns such as PDBs, microtwins, and subgrains did not show any significant effect on zircon crystallinity/metamictization degree or on the CL signature. However, the ratio of Raman band intensities B 1g (1008 cm –1 ) to E g (356 cm –1 ) slightly decreased within domains with low misorientation. The ratio values were affected in shocked grains, particularly in twinned domains with high misorientation. B 1g /E g ratio mapping combined with metamictization degree mapping (full width at half maximum of B 1g peak) suggest the presence of shock deformation features in zircon; however, due to the lower spatial resolution of the method, they must be used in combination with the EBSD technique. Additionally, we discovered anatase, quartz, goethite, calcite, and hematite micro-inclusions in the studied zircon grains, with quartz and anatase specifically being associated with strongly deformed domains of shocked zircon crystals.
Shock deformation microstructures in xenotime from the Spider impact structure, Western Australia
ABSTRACT The rare earth element–bearing phosphate xenotime (YPO 4 ) is isostructural with zircon, and therefore it has been predicted that xenotime forms similar shock deformation microstructures. However, systematic characterization of the range of microstructures that form in xenotime has not been conducted previously. Here, we report a study of 25 xenotime grains from 10 shatter cones in silicified sandstone from the Spider impact structure in Western Australia. We used electron backscatter diffraction (EBSD) in order to characterize deformation and microstructures within xenotime. The studied grains preserve multiple sets of planar fractures, lamellar {112} deformation twins, high-angle planar deformation bands (PDBs), partially recrystallized domains, and pre-impact polycrystalline grains. Pressure estimates from microstructures in coexisting minerals (quartz and zircon) allow some broad empirical constraints on formation conditions of ~10–20 GPa to be placed on the observed microstructures in xenotime; at present, more precise formation conditions are unavailable due to the absence of experimental constraints. Results from this study indicate that the most promising microstructures in xenotime for recording shock deformation are lamellar {112} twins, polycrystalline grains, and high-angle PDBs. The {112} deformation twins in xenotime are likely to be a diagnostic shock indicator, but they may require a different stress regime than that of {112} twinning in zircon. Likewise, polycrystalline grains are suggestive of impact-induced thermal recrystallization; however, in contrast to zircon, the impact-generated polycrystalline xenotime grains here appear to have formed in the solid state, and, in some cases, they may be difficult to distinguish from diagenetic xenotime with broadly similar textures.