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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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East Africa
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Ethiopia (1)
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Tanzania (1)
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Limpopo Belt (1)
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Nubian Shield (1)
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Merensky Reef (28)
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Transvaal region (33)
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Zimbabwe
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Asia
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Canada
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Ontario
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Western Canada
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Commonwealth of Independent States
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Koryak Range (1)
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Murmansk Russian Federation
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Russian Pacific region (1)
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Tajikistan (1)
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Ukraine (1)
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Urals
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Europe
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Central Europe
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Southern Europe
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Greece
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Italy (2)
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Western Europe
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Scandinavia
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Hebrides
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Highland region Scotland
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Rhum (2)
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Shetland Islands (3)
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Indian Ocean (1)
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Malay Archipelago
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North America
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Oceania
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Melanesia
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New Caledonia (9)
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Pacific Ocean
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North Pacific
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West Pacific
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Quesnellia Terrane (2)
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South America
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Brazil
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Para Brazil
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Guiana Shield (1)
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Southwest Indian Ridge (1)
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United States
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Alaska (1)
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California
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Colusa County California (1)
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Santa Barbara County California
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Maryland (1)
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Montana
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North Carolina
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Oklahoma (1)
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U. S. Rocky Mountains
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Absaroka Range
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Vermont
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Windham County Vermont (1)
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commodities
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brines (1)
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heavy mineral deposits (2)
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metal ores
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aluminum ores (1)
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base metals (11)
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chromite ores (62)
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copper ores (5)
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gold ores (4)
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iridium ores (3)
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iron ores (2)
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nickel ores (10)
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osmium ores (3)
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palladium ores (2)
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platinum ores (68)
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rhenium ores (1)
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titanium ores (2)
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zinc ores (1)
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mineral deposits, genesis (44)
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mineral exploration (13)
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placers (8)
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elements, isotopes
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boron (2)
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carbon
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C-13/C-12 (3)
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chemical ratios (1)
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halogens
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bromine (1)
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chlorine
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chloride ion (1)
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iodine (1)
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hydrogen
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D/H (1)
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-
isotope ratios (21)
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isotopes
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radioactive isotopes
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Pb-208/Pb-204 (1)
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Re-187/Os-188 (5)
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-
stable isotopes
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Ar-36 (1)
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C-13/C-12 (3)
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D/H (1)
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Hf-177/Hf-176 (1)
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Li-7/Li-6 (1)
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Mg-26/Mg-24 (1)
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N-15/N-14 (3)
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Nd-144/Nd-143 (2)
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O-16 (1)
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O-17 (1)
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O-18 (1)
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O-18/O-16 (3)
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Os-188/Os-187 (6)
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Pb-208/Pb-204 (1)
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Re-187/Os-188 (5)
-
S-34/S-32 (2)
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Sr-87/Sr-86 (3)
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Xe-136/Xe-130 (1)
-
-
-
metals
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alkali metals
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lithium
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Li-7/Li-6 (1)
-
-
-
alkaline earth metals
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beryllium (2)
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calcium (2)
-
magnesium
-
Mg-26/Mg-24 (1)
-
-
strontium
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Sr-87/Sr-86 (3)
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-
-
aluminum (3)
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chromium (14)
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cobalt (1)
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copper (7)
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gold (11)
-
hafnium
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Hf-177/Hf-176 (1)
-
-
iron
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ferric iron (2)
-
-
lead
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Pb-208/Pb-204 (1)
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manganese (3)
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nickel (5)
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niobium (1)
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platinum group
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iridium (25)
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iridium ores (3)
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osmium
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Os-188/Os-187 (6)
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Re-187/Os-188 (5)
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osmium ores (3)
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palladium (22)
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palladium ores (2)
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platinum (27)
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platinum ores (68)
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rhodium (13)
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ruthenium ores (3)
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precious metals (4)
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rare earths
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neodymium
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Nd-144/Nd-143 (2)
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rhenium
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Re-187/Os-188 (5)
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tantalum (1)
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titanium (3)
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tungsten (1)
-
-
nitrogen
-
N-15/N-14 (3)
-
-
noble gases
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argon
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Ar-36 (1)
-
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xenon
-
Xe-136/Xe-130 (1)
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-
-
oxygen
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O-16 (1)
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O-17 (1)
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O-18 (1)
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O-18/O-16 (3)
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selenium (1)
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silicon (1)
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sulfur
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S-34/S-32 (2)
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tellurium (1)
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trace metals (1)
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geochronology methods
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Ar/Ar (1)
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paleomagnetism (2)
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geologic age
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Cenozoic
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Tertiary
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Neogene
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Miocene
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lower Miocene (1)
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Paleogene
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Eocene (1)
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-
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Mesozoic
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Cretaceous
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Alisitos Formation (1)
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Jurassic
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Coast Range Ophiolite (1)
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upper Liassic (1)
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Josephine Peridotite (1)
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Triassic
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Upper Triassic (1)
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Paleozoic
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Cambrian
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Middle Cambrian (1)
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Carboniferous (1)
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Devonian (3)
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lower Paleozoic
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Bay of Islands Ophiolite (1)
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Glenarm Series (1)
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Ordovician
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Lower Ordovician
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Arenigian
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Ballantrae Complex (1)
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Permian (1)
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Phanerozoic (1)
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Precambrian
-
Archean
-
J-M Reef (2)
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Mesoarchean (6)
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Neoarchean
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Dharwar Supergroup (1)
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Sargur Group (1)
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Paleoarchean (1)
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Peninsular Gneiss (1)
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Baltimore Gneiss (1)
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Stillwater Complex (11)
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upper Precambrian
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Proterozoic
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Mesoproterozoic (1)
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Neoproterozoic (1)
-
Paleoproterozoic
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Rooiberg Group (2)
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Rustenburg Layered Suite (7)
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-
-
-
-
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igneous rocks
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igneous rocks
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carbonatites (1)
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kimberlite (3)
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plutonic rocks
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anorthosite (14)
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diabase (2)
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norite (13)
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olivine gabbro (1)
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granites
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felsite (1)
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lamprophyres
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minette (1)
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pegmatite (5)
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ultramafics
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chromitite (266)
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hornblendite (2)
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peridotites
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dunite (43)
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harzburgite (29)
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lherzolite (9)
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spinel lherzolite (1)
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pyroxenite
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clinopyroxenite (9)
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orthopyroxenite (7)
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websterite (1)
-
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-
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volcanic rocks
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andesites
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boninite (9)
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basalts
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alkali basalts (2)
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mid-ocean ridge basalts (9)
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olivine tholeiite (1)
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tholeiitic basalt (1)
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komatiite (5)
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trachyandesites
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absarokite (1)
-
-
-
-
ophiolite (74)
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pyrolite (1)
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wehrlite (3)
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metamorphic rocks
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metamorphic rocks
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eclogite (2)
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granulites
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leptite (1)
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metaigneous rocks
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metagabbro (2)
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metaperidotite (2)
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serpentinite (5)
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metasomatic rocks
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serpentinite (5)
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skarn (2)
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mylonites (1)
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schists
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greenstone (1)
-
-
-
ophiolite (74)
-
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meteorites
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meteorites
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stony meteorites
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chondrites
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carbonaceous chondrites
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CV chondrites
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Allende Meteorite (1)
-
-
-
-
-
-
-
minerals
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alloys
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awaruite (3)
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carbides
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moissanite (7)
-
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nitrides (3)
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silicides (2)
-
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antimonides (4)
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arsenides
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sperrylite (8)
-
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bismuthides (3)
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borates
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ludwigite (3)
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carbonates
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magnesite (1)
-
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chromates (1)
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halides
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chlorides (1)
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-
hydrates (1)
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minerals (10)
-
native elements
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diamond
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microdiamond (3)
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graphite (1)
-
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oxides
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baddeleyite (1)
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chrome spinel (24)
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chromite (59)
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corundum (6)
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hematite (1)
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hydroxides (3)
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magnetite (9)
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niobates
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pyrochlore (1)
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perovskite (1)
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rutile (7)
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spinel (13)
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titanium oxides (1)
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uraninite (1)
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zirconolite (1)
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phosphates
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platinum minerals (46)
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silicates
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chain silicates
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amphibole group
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clinoamphibole
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actinolite (1)
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tremolite (2)
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tschermakite (1)
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prehnite (1)
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pyroxene group
-
clinopyroxene
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diopside (1)
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orthopyroxene
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enstatite (1)
-
-
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framework silicates
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feldspar group
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plagioclase
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albite (1)
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silica minerals
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chalcedony (1)
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coesite (3)
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quartz (1)
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stishovite (2)
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magnesian silicates (1)
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orthosilicates
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nesosilicates
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garnet group
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grossular (1)
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majorite (1)
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uvarovite (5)
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kyanite (2)
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mullite (1)
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olivine group
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forsterite (7)
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olivine (15)
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ringwoodite (2)
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wadsleyite (1)
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titanite group
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titanite (1)
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zircon group
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thorite (1)
-
zircon (6)
-
-
-
sorosilicates
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epidote group
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epidote (1)
-
-
-
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ring silicates
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tourmaline group (1)
-
-
sheet silicates
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chlorite group
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chlorite (2)
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clinochlore (3)
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mica group
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biotite (1)
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phlogopite (4)
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serpentine group
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chrysotile (1)
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serpentine (5)
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talc (1)
-
-
-
sulfates (2)
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sulfides
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arsenosulfides (1)
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chalcopyrite (9)
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cooperite (6)
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copper sulfides (3)
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cubanite (1)
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galena (1)
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heazlewoodite (3)
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iron sulfides (1)
-
laurite (30)
-
millerite (2)
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Primary terms
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Africa
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Atlantic Ocean Islands
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Australasia
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bitumens
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Canada
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Quebec
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Muskox Intrusion (3)
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Western Canada
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carbon
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C-13/C-12 (3)
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Caribbean region
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West Indies
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Greater Antilles
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Cenozoic
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Tertiary
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Neogene
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lower Miocene (1)
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Paleogene
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chemical analysis (2)
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deformation (7)
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Europe
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Southern Europe
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Greece
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Italy (2)
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Hebrides
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Highland region Scotland
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Rhum (2)
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Shetland Islands (3)
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faults (6)
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foliation (4)
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geochemistry (48)
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geophysical methods (3)
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hydrogen
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granites
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pegmatite (5)
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ultramafics
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chromitite (266)
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hornblendite (2)
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dunite (43)
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-
spinel lherzolite (1)
-
-
pyroxenite
-
clinopyroxenite (9)
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orthopyroxenite (7)
-
websterite (1)
-
-
-
-
volcanic rocks
-
andesites
-
boninite (9)
-
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basalts
-
alkali basalts (2)
-
mid-ocean ridge basalts (9)
-
olivine tholeiite (1)
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tholeiitic basalt (1)
-
-
komatiite (5)
-
trachyandesites
-
absarokite (1)
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-
-
-
inclusions
-
fluid inclusions (3)
-
-
Indian Ocean (1)
-
Indian Ocean Islands
-
Madagascar (1)
-
-
intrusions (81)
-
isotopes
-
radioactive isotopes
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Pb-208/Pb-204 (1)
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Re-187/Os-188 (5)
-
-
stable isotopes
-
Ar-36 (1)
-
C-13/C-12 (3)
-
D/H (1)
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Hf-177/Hf-176 (1)
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Li-7/Li-6 (1)
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Mg-26/Mg-24 (1)
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N-15/N-14 (3)
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Nd-144/Nd-143 (2)
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O-16 (1)
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O-17 (1)
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O-18 (1)
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O-18/O-16 (3)
-
Os-188/Os-187 (6)
-
Pb-208/Pb-204 (1)
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Re-187/Os-188 (5)
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S-34/S-32 (2)
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Sr-87/Sr-86 (3)
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Xe-136/Xe-130 (1)
-
-
-
lava (2)
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lineation (1)
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magmas (70)
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magnesite deposits (1)
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Malay Archipelago
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Timor
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East Timor (1)
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-
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mantle (54)
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Mediterranean Sea (1)
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Mesozoic
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Cretaceous
-
Alisitos Formation (1)
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Lower Cretaceous (1)
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Jurassic
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Coast Range Ophiolite (1)
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Lower Jurassic
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upper Liassic (1)
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Middle Jurassic (1)
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Upper Jurassic
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Josephine Peridotite (1)
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Triassic
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metal ores
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metals
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alkali metals
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alkaline earth metals
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beryllium (2)
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magnesium
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Mg-26/Mg-24 (1)
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strontium
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Sr-87/Sr-86 (3)
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aluminum (3)
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copper (7)
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gold (11)
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hafnium
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Hf-177/Hf-176 (1)
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iron
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ferric iron (2)
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lead
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Pb-208/Pb-204 (1)
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manganese (3)
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niobium (1)
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platinum group
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iridium (25)
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iridium ores (3)
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osmium
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Os-188/Os-187 (6)
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Re-187/Os-188 (5)
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osmium ores (3)
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palladium (22)
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platinum (27)
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rhodium (13)
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precious metals (4)
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rare earths
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neodymium
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Nd-144/Nd-143 (2)
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rhenium
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Re-187/Os-188 (5)
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tantalum (1)
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metamorphic rocks
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metaigneous rocks
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Mexico
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Guerrero Mexico (1)
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mineral deposits, genesis (44)
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noble gases
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Ar-36 (1)
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xenon
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Xe-136/Xe-130 (1)
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North America
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Appalachians
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Ocean Drilling Program
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ODP Site 735 (1)
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ocean floors (1)
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Oceania
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New Caledonia (9)
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oxygen
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O-17 (1)
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O-18/O-16 (3)
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Pacific Ocean
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paleomagnetism (2)
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Paleozoic
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Devonian (3)
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lower Paleozoic
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Bay of Islands Ophiolite (1)
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Permian (1)
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Precambrian
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upper Precambrian
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South America
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soft sediment deformation
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sediments
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sediments
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clastic sediments
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soils
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soils
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
chromitite
Jianmuite, ZrTi 4 + Ti 5 3 + Al 3 O 16 , a new mineral from the Allende meteorite and from chromitite near Kangjinla, Tibet, China Available to Purchase
Terminal subduction processes of the Paleo-Asian Ocean: Insights from podiform chromitites in the Solonker suture zone, southeastern Central Asian Orogenic Belt Available to Purchase
Parental magma and mantle source compositions of chromitites in the Mesoarchean Nuggihalli greenstone belt, India: evidence for Archean subduction zone magmatism Available to Purchase
Geochemical characteristics of mineral inclusions in the Luobusa chromitite (Southern Tibet): Implications for an intricate geological setting Available to Purchase
The Petrogenesis of the Lower Critical Zone and Lower Group Chromitites, Eastern Bushveld Complex: Incremental Development of Igneous Layering and Injection of Chromite Slurries Available to Purchase
Origin of Chromitite-Anorthosite Interlayering in the Bushveld Complex Available to Purchase
A High-Resolution Geochemical and Petrological Investigation of Bifurcating Chromitite Layers of the UG1 Footwall at Impala Platinum Mine, Rustenburg Available to Purchase
Re−Os Isotope and PGE Abundance Systematics of Coast Range Ophiolite Peridotites and Chromitite, California: Insights into Fore-Arc Magmatic Processes Open Access
Savelievaite, Mg 2 CrO 2 (BO 3 ), the first natural borate with species-defining Cr 3+ and the ludwigite–savelievaite isomorphous series Available to Purchase
Sources of Ore Material in the Platinum-Group Element Deposits of Polar Siberia and the Middle Urals Based on the Data from Radiogenic (Re–Os, Pt–Os) and Stable (Cu, S) Isotopes Available to Purchase
Two-pyroxene intergrowth exsolution textures in ophiolitic chromites: implications for the deep mantle origin of the Mirdita ophiolite, Albania Available to Purchase
Mineral and whole-rock geochemistry of high-Al podiform chromitites in the Fizh Massif of the Cretaceous Oman ophiolite: origin of hydrous N-MORB melts in a nascent forearc setting Available to Purchase
Tetrahedrite-(Ni), Cu 6 (Cu 4 Ni 2 )Sb 4 S 13 , the first nickel member of tetrahedrite group mineral from Luobusa chromite deposits, Tibet, China Available to Purchase
FTIR study of H 2 O in silicate minerals and mineral inclusions in chromite from the peridotite zone of the Stillwater complex (Montana, USA): Evidence for chromitite formation in an H 2 O-rich environment Available to Purchase
Petrographic and geochemical evidence of calc-silicate xenolith – magma interaction in the western Bushveld Complex, South Africa Available to Purchase
Microchemistry and magnesium isotope composition of the Purang ophiolitic chromitites (SW Tibet): New genetic inferences Available to Purchase
Distributions of Platinum Group Elements and Re-Os Isotope Systematics in Chromite from the Coobina Chromitite Deposit in Western Australia: Implications for Chromite as a Sulfide Mineralization Indicator Available to Purchase
Guerrero-Alisitos-Vizcaino superterrane of western Mexico and its ties to the Mexican continental margin (Gondwana and SW Laurentia) Available to Purchase
ABSTRACT This chapter expands upon a model, first proposed in 1998 by Busby and others, in which Mesozoic oceanic-arc rocks of Baja California formed along the Mexican continental margin above a single east-dipping subduction zone, and were extensional in nature, due to rollback of an old, cold subducting slab (Panthalassa). It expands on that model by roughly tripling the area of the region representing this fringing extensional oceanic-arc system to include the western third of mainland Mexico. This chapter summarizes the geologic, paleomagnetic, and detrital zircon data that tie all of these oceanic-arc rocks to each other and to the Mexican margin, herein termed the Guerrero-Alisitos-Vizcaino superterrane. These data contradict a model that proposes the oceanic-arc rocks formed in unrelated archipelagos some 2000–4000 km west of Pangean North America. Following the termination of Permian–Triassic (280–240 Ma) subduction under continental Mexico, the paleo-Pacific Mexico margin was a passive margin dominated by a huge siliciclastic wedge (Potosí fan) composed of sediments eroded from Gondwanan basement and Permian continental-arc rocks. I propose that a second fan formed further north, termed herein the Antimonio-Barranca fan, composed of sediment eroded from southwest Laurentian sources. Zircons from these two fans were dispersed onto the ocean floor as turbidites, forming a unifying signature in the Guerrero-Alisitos-Vizcaino superterrane. The oldest rocks in the Guerrero-Alisitos-Vizcaino superterrane record subduction initiation in the oceanic realm, producing the 221 Ma Vizcaino ophiolite, which predated the onset of arc magmatism. This ophiolite contains Potosí fan zircons as xenocrysts in its chromitites, which I suggest were deposited on the seafloor before the trench formed and then were subducted eastward. This is consistent with the geophysical interpretation that the Cocos plate (the longest subducted plate on Earth) began subducting eastward under Mexico at 220 Ma. The Early Jurassic to mid-Cretaceous oceanic arc of western Mexico formed above this east-dipping slab, shifting positions with time, and was largely extensional, forming intra-arc basins and spreading centers, including a backarc basin along the continental margin (Arperos basin). Turbidites with ancient Mexican detrital zircons were deposited in many of these basins and recycled along normal fault scarps. By mid-Cretaceous time, the extensional oceanic arc began to evolve into a contractional continental arc, probably due to an increase in convergence rate that was triggered by a global plate reorganization. Contraction expanded eastward (inboard) throughout the Late Cretaceous, along with inboard migration of arc magmatism, suggesting slab shallowing with time.