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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
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Altiplano (1)
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Asia
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Far East
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China
-
North China Platform (1)
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Bear Mountain (1)
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Bear River basin (1)
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Black Hills (9)
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Canada
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Eastern Canada
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Ontario
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Sudbury Ontario (1)
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Western Canada
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Alberta
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Alberta Basin (1)
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Medicine Hat Alberta (1)
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British Columbia
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Saskatchewan (1)
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Europe
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Front Range (1)
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Granite Mountains (4)
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Green River basin (1)
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Indian Ocean
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Red Sea (1)
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Iron Mountain (1)
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Madison Range (6)
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North America
-
Basin and Range Province (1)
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Belt Basin (1)
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Canadian Shield
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Churchill Province
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Hearne Province (7)
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Slave Province (1)
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Superior Province (10)
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Great Plains
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Northern Great Plains (1)
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North American Cordillera (1)
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Purcell Mountains (1)
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Rocky Mountains
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Northern Rocky Mountains (1)
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Southern Rocky Mountains (3)
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U. S. Rocky Mountains
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Absaroka Range
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Beartooth Mountains (2)
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Bighorn Mountains (3)
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Bitterroot Range
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Beaverhead Mountains (1)
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-
Laramie Mountains (4)
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Little Belt Mountains (2)
-
Medicine Bow Mountains (5)
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Owl Creek Mountains (4)
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Spanish Peaks (2)
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Tendoy Range (1)
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Tobacco Root Mountains (3)
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Uinta Mountains (2)
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Wasatch Range (1)
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Wind River Range (8)
-
-
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Rocky Mountains foreland (2)
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Western Canada Sedimentary Basin (2)
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Puna (1)
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Rattlesnake Hills (1)
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Ruby Range (1)
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Sand Wash Basin (1)
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Sierra Madre (4)
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Snake River canyon (1)
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South America
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Andes (1)
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South Pass (1)
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United States
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Absaroka Fault (1)
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California (1)
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Cheyenne Belt (8)
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Colorado (5)
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Colorado Plateau (2)
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Idaho (3)
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Kansas
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Riley County Kansas (1)
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Midcontinent (2)
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Midwest (1)
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Montana
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Beaverhead County Montana
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Tendoy Range (1)
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Gallatin County Montana (3)
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Little Belt Mountains (2)
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Madison County Montana
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Tobacco Root Mountains (3)
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New Hampshire (1)
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Powder River basin (1)
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Sevier orogenic belt (1)
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South Dakota
-
Custer County South Dakota (3)
-
Harney Peak Granite (1)
-
Lawrence County South Dakota (2)
-
Pennington County South Dakota (3)
-
-
U. S. Rocky Mountains
-
Absaroka Range
-
Beartooth Mountains (2)
-
-
Bighorn Mountains (3)
-
Bitterroot Range
-
Beaverhead Mountains (1)
-
-
Laramie Mountains (4)
-
Little Belt Mountains (2)
-
Medicine Bow Mountains (5)
-
Owl Creek Mountains (4)
-
Spanish Peaks (2)
-
Tendoy Range (1)
-
Tobacco Root Mountains (3)
-
Uinta Mountains (2)
-
Wasatch Range (1)
-
Wind River Range (8)
-
-
Utah
-
Daggett County Utah (1)
-
Morgan County Utah (1)
-
Salt Lake County Utah (1)
-
Summit County Utah (1)
-
-
Western U.S. (2)
-
Wyoming
-
Big Horn County Wyoming (2)
-
Carbon County Wyoming
-
Seminoe Mountains (1)
-
-
Fremont County Wyoming (6)
-
Hanna Basin (1)
-
Natrona County Wyoming (3)
-
Owl Creek Mountains (4)
-
Platte County Wyoming (1)
-
Rock Springs Uplift (1)
-
Sheridan County Wyoming (2)
-
Sierra Madre Range (1)
-
Sublette County Wyoming (1)
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Teton County Wyoming (1)
-
Washakie County Wyoming (2)
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Wind River Range (8)
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Wyoming Province (66)
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Yavapai Province (2)
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commodities
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oil and gas fields (1)
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petroleum (1)
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elements, isotopes
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isotope ratios (13)
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isotopes
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radioactive isotopes
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
-
Pb-208/Pb-204 (3)
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Sm-147/Nd-144 (2)
-
-
stable isotopes
-
Nd-144/Nd-143 (10)
-
O-18/O-16 (2)
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-207/Pb-206 (3)
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Pb-208/Pb-204 (3)
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Sm-147/Nd-144 (2)
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Sr-87/Sr-86 (3)
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metals
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actinides
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thorium (1)
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uranium (1)
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alkaline earth metals
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barium (1)
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strontium
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Sr-87/Sr-86 (3)
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lead
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-207/Pb-206 (3)
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Pb-208/Pb-204 (3)
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-
niobium (1)
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rare earths
-
neodymium
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Nd-144/Nd-143 (10)
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Sm-147/Nd-144 (2)
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samarium
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Sm-147/Nd-144 (2)
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oxygen
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O-18/O-16 (2)
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geochronology methods
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Ar/Ar (4)
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Nd/Nd (1)
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paleomagnetism (3)
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Pb/Pb (5)
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Rb/Sr (3)
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Sm/Nd (2)
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Th/U (1)
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U/Pb (26)
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U/Th/Pb (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 (1)
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Paleogene
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Eocene (1)
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Mesozoic
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Cretaceous
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Upper Cretaceous
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Frontier Formation (1)
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Jurassic
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Upper Jurassic
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Stump Formation (1)
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-
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Nugget Sandstone (1)
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Triassic
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Lower Triassic
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Dinwoody Formation (1)
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-
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Paleozoic
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Carboniferous
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Mississippian
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Madison Group (1)
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Upper Mississippian
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Chesterian (1)
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-
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Pennsylvanian
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Lower Pennsylvanian
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Morrowan (1)
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-
-
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Devonian (2)
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Ordovician
-
Upper Ordovician
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Bighorn Dolomite (1)
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-
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Permian
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Phosphoria Formation (1)
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-
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Phanerozoic (1)
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Precambrian
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Archean
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Mesoarchean (2)
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Neoarchean (13)
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Paleoarchean (3)
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-
Hadean (2)
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Spuhler Peak Formation (1)
-
upper Precambrian
-
Proterozoic
-
Huronian (1)
-
Mesoproterozoic
-
Belt Supergroup (1)
-
-
Paleoproterozoic (19)
-
-
-
-
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igneous rocks
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igneous rocks
-
kimberlite (1)
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plutonic rocks
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diorites (1)
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gabbros (2)
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granites
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leucogranite (3)
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-
granodiorites (2)
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lamproite (1)
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lamprophyres
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minette (1)
-
-
pegmatite (2)
-
ultramafics
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pyroxenite
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clinopyroxenite (1)
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-
-
-
volcanic rocks
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basalts
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flood basalts (1)
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pyroclastics
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ignimbrite (1)
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-
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ophiolite (1)
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metamorphic rocks
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metamorphic rocks
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amphibolites (4)
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gneisses
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granite gneiss (1)
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orthogneiss (1)
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granulites (1)
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metaigneous rocks
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metabasite (1)
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metagabbro (1)
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metagranite (1)
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metaplutonic rocks (1)
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metasedimentary rocks
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metagraywacke (1)
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metapelite (4)
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metavolcanic rocks (6)
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migmatites (1)
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mylonites (6)
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quartzites (1)
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schists (2)
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ophiolite (1)
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minerals
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native elements
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graphite (1)
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oxides
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baddeleyite (1)
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phosphates
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apatite (1)
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monazite (4)
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silicates
-
chain silicates
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amphibole group
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clinoamphibole
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hornblende (6)
-
-
-
-
framework silicates
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feldspar group
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alkali feldspar
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hyalophane (1)
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K-feldspar (1)
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barium feldspar
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hyalophane (1)
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-
plagioclase (1)
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silica minerals
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quartz (1)
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-
-
orthosilicates
-
nesosilicates
-
andalusite (1)
-
garnet group
-
almandine (1)
-
-
staurolite (1)
-
titanite group
-
titanite (4)
-
-
zircon group
-
zircon (22)
-
-
-
sorosilicates
-
epidote group
-
allanite (1)
-
-
-
-
sheet silicates
-
illite (1)
-
mica group
-
biotite (5)
-
muscovite (2)
-
-
-
-
-
Primary terms
-
absolute age (32)
-
Asia
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Far East
-
China
-
North China Platform (1)
-
-
-
-
Canada
-
Eastern Canada
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Ontario
-
Sudbury Ontario (1)
-
-
-
Western Canada
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Alberta
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Alberta Basin (1)
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Medicine Hat Alberta (1)
-
-
British Columbia
-
Kimberley British Columbia (1)
-
-
Saskatchewan (1)
-
-
-
Cenozoic
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Eocene (1)
-
-
-
-
continental drift (4)
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crust (26)
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deformation (15)
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Europe
-
Fennoscandian Shield (1)
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Karelia (1)
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faults (20)
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folds (6)
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foliation (4)
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fractures (1)
-
geochemistry (13)
-
geochronology (3)
-
geophysical methods (9)
-
heat flow (2)
-
igneous rocks
-
kimberlite (1)
-
plutonic rocks
-
diorites (1)
-
gabbros (2)
-
granites
-
leucogranite (3)
-
-
granodiorites (2)
-
lamproite (1)
-
lamprophyres
-
minette (1)
-
-
pegmatite (2)
-
ultramafics
-
pyroxenite
-
clinopyroxenite (1)
-
-
-
-
volcanic rocks
-
basalts
-
flood basalts (1)
-
-
pyroclastics
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ignimbrite (1)
-
-
-
-
inclusions (4)
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Indian Ocean
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Red Sea (1)
-
-
intrusions (15)
-
isotopes
-
radioactive isotopes
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-208/Pb-204 (3)
-
Sm-147/Nd-144 (2)
-
-
stable isotopes
-
Nd-144/Nd-143 (10)
-
O-18/O-16 (2)
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-207/Pb-206 (3)
-
Pb-208/Pb-204 (3)
-
Sm-147/Nd-144 (2)
-
Sr-87/Sr-86 (3)
-
-
-
lineation (2)
-
magmas (9)
-
mantle (6)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Frontier Formation (1)
-
-
-
Jurassic
-
Upper Jurassic
-
Stump Formation (1)
-
-
-
Nugget Sandstone (1)
-
Triassic
-
Lower Triassic
-
Dinwoody Formation (1)
-
-
-
-
metals
-
actinides
-
thorium (1)
-
uranium (1)
-
-
alkaline earth metals
-
barium (1)
-
strontium
-
Sr-87/Sr-86 (3)
-
-
-
lead
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-207/Pb-206 (3)
-
Pb-208/Pb-204 (3)
-
-
niobium (1)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (10)
-
Sm-147/Nd-144 (2)
-
-
samarium
-
Sm-147/Nd-144 (2)
-
-
-
-
metamorphic rocks
-
amphibolites (4)
-
gneisses
-
granite gneiss (1)
-
orthogneiss (1)
-
-
granulites (1)
-
metaigneous rocks
-
metabasite (1)
-
metagabbro (1)
-
metagranite (1)
-
-
metaplutonic rocks (1)
-
metasedimentary rocks
-
metagraywacke (1)
-
metapelite (4)
-
-
metavolcanic rocks (6)
-
migmatites (1)
-
mylonites (6)
-
quartzites (1)
-
schists (2)
-
-
metamorphism (14)
-
metasomatism (2)
-
Mohorovicic discontinuity (4)
-
North America
-
Basin and Range Province (1)
-
Belt Basin (1)
-
Canadian Shield
-
Churchill Province
-
Hearne Province (7)
-
-
Slave Province (1)
-
Superior Province (10)
-
-
Great Plains
-
Northern Great Plains (1)
-
-
North American Cordillera (1)
-
Purcell Mountains (1)
-
Rocky Mountains
-
Northern Rocky Mountains (1)
-
Southern Rocky Mountains (3)
-
U. S. Rocky Mountains
-
Absaroka Range
-
Beartooth Mountains (2)
-
-
Bighorn Mountains (3)
-
Bitterroot Range
-
Beaverhead Mountains (1)
-
-
Laramie Mountains (4)
-
Little Belt Mountains (2)
-
Medicine Bow Mountains (5)
-
Owl Creek Mountains (4)
-
Spanish Peaks (2)
-
Tendoy Range (1)
-
Tobacco Root Mountains (3)
-
Uinta Mountains (2)
-
Wasatch Range (1)
-
Wind River Range (8)
-
-
-
Rocky Mountains foreland (2)
-
Western Canada Sedimentary Basin (2)
-
-
ocean floors (1)
-
oil and gas fields (1)
-
orogeny (7)
-
oxygen
-
O-18/O-16 (2)
-
-
paleogeography (5)
-
paleomagnetism (3)
-
Paleozoic
-
Carboniferous
-
Mississippian
-
Madison Group (1)
-
Upper Mississippian
-
Chesterian (1)
-
-
-
Pennsylvanian
-
Lower Pennsylvanian
-
Morrowan (1)
-
-
-
-
Devonian (2)
-
Ordovician
-
Upper Ordovician
-
Bighorn Dolomite (1)
-
-
-
Permian
-
Phosphoria Formation (1)
-
-
-
paragenesis (2)
-
petroleum (1)
-
petrology (1)
-
Phanerozoic (1)
-
phase equilibria (1)
-
plate tectonics (20)
-
Precambrian
-
Archean
-
Mesoarchean (2)
-
Neoarchean (13)
-
Paleoarchean (3)
-
-
Hadean (2)
-
Spuhler Peak Formation (1)
-
upper Precambrian
-
Proterozoic
-
Huronian (1)
-
Mesoproterozoic
-
Belt Supergroup (1)
-
-
Paleoproterozoic (19)
-
-
-
-
remote sensing (2)
-
sea-floor spreading (1)
-
sedimentary rocks
-
carbonate rocks (1)
-
clastic rocks
-
graywacke (1)
-
-
-
sedimentation (1)
-
sediments
-
clastic sediments
-
clay (1)
-
sand (1)
-
-
-
South America
-
Andes (1)
-
-
spectroscopy (1)
-
stratigraphy (3)
-
structural analysis (5)
-
structural geology (4)
-
tectonics (25)
-
tectonophysics (3)
-
United States
-
Absaroka Fault (1)
-
Bighorn Basin (1)
-
California (1)
-
Cheyenne Belt (8)
-
Colorado (5)
-
Colorado Plateau (2)
-
Idaho (3)
-
Kansas
-
Riley County Kansas (1)
-
-
Midcontinent (2)
-
Midwest (1)
-
Montana
-
Beaverhead County Montana
-
Tendoy Range (1)
-
-
Gallatin County Montana (3)
-
Little Belt Mountains (2)
-
Madison County Montana
-
Tobacco Root Mountains (3)
-
-
-
New Hampshire (1)
-
Powder River basin (1)
-
Sevier orogenic belt (1)
-
South Dakota
-
Custer County South Dakota (3)
-
Harney Peak Granite (1)
-
Lawrence County South Dakota (2)
-
Pennington County South Dakota (3)
-
-
U. S. Rocky Mountains
-
Absaroka Range
-
Beartooth Mountains (2)
-
-
Bighorn Mountains (3)
-
Bitterroot Range
-
Beaverhead Mountains (1)
-
-
Laramie Mountains (4)
-
Little Belt Mountains (2)
-
Medicine Bow Mountains (5)
-
Owl Creek Mountains (4)
-
Spanish Peaks (2)
-
Tendoy Range (1)
-
Tobacco Root Mountains (3)
-
Uinta Mountains (2)
-
Wasatch Range (1)
-
Wind River Range (8)
-
-
Utah
-
Daggett County Utah (1)
-
Morgan County Utah (1)
-
Salt Lake County Utah (1)
-
Summit County Utah (1)
-
-
Western U.S. (2)
-
Wyoming
-
Big Horn County Wyoming (2)
-
Carbon County Wyoming
-
Seminoe Mountains (1)
-
-
Fremont County Wyoming (6)
-
Hanna Basin (1)
-
Natrona County Wyoming (3)
-
Owl Creek Mountains (4)
-
Platte County Wyoming (1)
-
Rock Springs Uplift (1)
-
Sheridan County Wyoming (2)
-
Sierra Madre Range (1)
-
Sublette County Wyoming (1)
-
Teton County Wyoming (1)
-
Washakie County Wyoming (2)
-
Wind River Range (8)
-
-
Wyoming Province (66)
-
Yavapai Province (2)
-
-
X-ray analysis (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
carbonate rocks (1)
-
clastic rocks
-
graywacke (1)
-
-
-
-
sediments
-
sediments
-
clastic sediments
-
clay (1)
-
sand (1)
-
-
-
Wyoming Province
Structural inheritance and the role of basement anisotropies in the Laramide structural and tectonic evolution of the North American Cordilleran foreland, Wyoming
2.7 Ga high-pressure granulites of the Teton Range: Record of Neoarchean continent collision and exhumation
Neoarchean tectonic history of the Teton Range: Record of accretion against the present-day western margin of the Wyoming Province
Wyoming on the run—Toward final Paleoproterozoic assembly of Laurentia: COMMENT
Wyoming on the run—Toward final Paleoproterozoic assembly of Laurentia: REPLY
Hadean origins of Paleoarchean continental crust in the central Wyoming Province
Destruction of the Wyoming craton: Seismic evidence and geodynamic processes
Wyoming on the run—Toward final Paleoproterozoic assembly of Laurentia
Proterozoic mafic magmatic rocks exposed along the western side of North America, or western Laurentia, from Kimberley, British Columbia, through to northwestern Wyoming have been previously divided into two large igneous provinces: the ca. 1460 Ma Moyie-Purcell and the ca. 780 Ma Gunbarrel large igneous provinces. New geochemical analysis from this study demonstrates that there are additional intraplate mafic magmatic rocks present. Distinguishable by variable normalized rare earth element patterns combined with differing slopes on a binary Ti versus V plot, there are 17 identifiable geochemical signatures in the 307 whole-rock and trace-element analyses from this study. Only seven of these signatures can be linked to the ca. 1460 Ma Moyie-Purcell large igneous province, and one signature to the 780 Ma Gunbarrel large igneous province. This study has identified two groups of intrusions with distinct geochemical signatures previously linked with the ca. 1460 Ma Moyie-Purcell large igneous province but now recognized to be separate events, a single unique geochemical signature with a U-Pb age correlative with the Moyie-Purcell large igneous province and seven other heretofore unidentified signatures interpreted to belong to additional undated events.
The Neihart Quartzite and LaHood Formation are the lowermost units exposed in the Helena embayment, which forms the eastern and southeastern margins of the Belt Basin. Ages of detrital zircons from the Neihart Quartzite (quartz arenite) and a range of lithologies in the LaHood Formation (conglomerates to arkoses to siltstones) show that these units do not share a common provenance. The dominant provenance is Paleoarchean for the LaHood Formation and Paleoproterozoic for the Neihart Quartzite. Provenance is further constrained by the geochemistry and U-Pb ages of zircons from cobbles from the classic LaHood conglomerate in Jefferson Canyon (Tobacco Root Mountains), ages of Paleoproterozoic crystalline basement in the Beaverhead-Tendoy Mountains (1.8–2.45 Ga), and elemental and Sm-Nd isotopic data for select samples of both sedimentary rocks and crystalline basement within the basin. These data show a pronounced lack of detritus from abundant, proximal Neoarchean (2.7–2.9 Ga) and Paleoproterozoic (1.9–2.5 Ga) crystalline basement exposed in Laramide uplifts and the soles of Sevier-style thrust faults within and near the basin. Analyses of detrital mineral assemblages in the Lower Belt Supergroup units clearly indicate that the finer-grained portions of the LaHood Formation were not locally derived, based on abundant white mica in sections overlying tonalite-trondhjemite-granodiorite (TTG) basement and lack of amphibole in units overlying hornblende tonalites. Significant fractionation also exists between sand- and cobble-size components in conglomerate of the LaHood Formation in terms of elemental abundances, isotopic compositions, and the U-Pb ages of zircons. Stratigraphically, the differences in the ages of the youngest zircons in all LaHood Formation samples and the Neihart Quartzite (1.71 Ga, Neihart; 1.78 Ga, LaHood) do not refute any proposed stratigraphic correlations. Nonetheless, age spectra of detrital zircons from the Neihart Quartzite, all LaHood lithologies, and previously published data for the Newland Formation show distinctions of provenance and an apparent lack of interaction among the sediment-supply systems of these three formations. This contrast suggests that distinct, likely fault-bounded, sedimentologically restricted subbasins characterized the initial stages of development of the eastern Belt Basin along the Perry line (southeastern margin of the Helena embayment), in the manner of a modern, but partially submerged, Basin and Range topography. The time of development of this topography is not clear, but it may have been related to the collapse phase of the Great Falls orogeny at ca. 1.7 Ga for the Helena embayment. The primary, north-south–trending Belt Basin also developed subsequent to the Great Falls orogeny along the western paleomargin of the newly amalgamated Wyoming–Medicine Hat–Hearne craton.