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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Canada
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Eastern Canada
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Ontario
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Thunder Bay District Ontario
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Lake Nipigon (1)
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Western Canada
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Manitoba
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Snow Lake Manitoba (1)
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East Pacific Ocean Islands
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Galapagos Islands (1)
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Middle Valley (2)
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North America
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Canadian Shield
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Superior Province
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Abitibi Belt (1)
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Uchi Subprovince (1)
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Wawa Belt (2)
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Great Lakes
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Lake Superior (1)
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Keweenawan Rift (1)
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Pacific Ocean
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East Pacific
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East Pacific Rise (1)
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Galapagos Rift (2)
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Northeast Pacific
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Axial Seamount (2)
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Cobb Seamount (1)
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Juan de Fuca Ridge
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Endeavour Ridge (1)
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North Pacific
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Northeast Pacific
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Axial Seamount (2)
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Cobb Seamount (1)
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Juan de Fuca Ridge
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Endeavour Ridge (1)
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Rice Lake (1)
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San Antonio Mine (1)
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South America
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Peru (1)
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Sturgeon Lake (1)
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commodities
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barite deposits (1)
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metal ores
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base metals (1)
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chromite ores (1)
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copper ores (4)
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gold ores (3)
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lead ores (2)
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lead-zinc deposits (2)
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molybdenum ores (1)
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silver ores (1)
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uranium ores (1)
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zinc ores (6)
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mineral deposits, genesis (8)
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elements, isotopes
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hydrogen
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D/H (1)
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isotope ratios (6)
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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)
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Pb-208/Pb-204 (3)
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Rb-87/Sr-86 (1)
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Sm-147/Nd-144 (1)
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Th-232 (1)
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U-238 (1)
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stable isotopes
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D/H (1)
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Nd-144/Nd-143 (4)
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O-18/O-16 (1)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-208/Pb-204 (3)
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Rb-87/Sr-86 (1)
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S-34/S-32 (2)
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Sm-147/Nd-144 (1)
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Sr-87/Sr-86 (3)
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metals
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actinides
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thorium
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Th-232 (1)
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uranium
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U-238 (1)
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alkali metals
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rubidium
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Rb-87/Sr-86 (1)
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alkaline earth metals
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strontium
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Rb-87/Sr-86 (1)
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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-208/Pb-204 (3)
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platinum group (2)
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rare earths
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neodymium
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Nd-144/Nd-143 (4)
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Sm-147/Nd-144 (1)
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samarium
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Sm-147/Nd-144 (1)
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oxygen
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O-18/O-16 (1)
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sulfur
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S-34/S-32 (2)
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geochronology methods
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U/Pb (2)
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uranium disequilibrium (1)
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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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Mesozoic
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Cretaceous
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Lower Cretaceous
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Albian (1)
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Precambrian
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Animikie Group (1)
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upper Precambrian
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Mesoproterozoic (1)
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Paleoproterozoic
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Aphebian (1)
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igneous rocks
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igneous rocks
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diabase (1)
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gabbros (2)
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pegmatite (1)
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ultramafics (2)
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volcanic rocks
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mid-ocean ridge basalts (3)
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pyroclastics
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minerals
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amethyst (1)
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orthosilicates
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zircon group
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zircon (2)
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sorosilicates
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epidote group
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epidote (1)
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sheet silicates
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clay minerals
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smectite (1)
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sulfates
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barite (2)
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sulfides (5)
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Primary terms
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absolute age (2)
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barite deposits (1)
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Canada
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Eastern Canada
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Ontario
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Thunder Bay District Ontario
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Lake Nipigon (1)
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Western Canada
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Manitoba
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Snow Lake Manitoba (1)
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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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crust (2)
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Deep Sea Drilling Project (1)
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deformation (1)
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East Pacific Ocean Islands
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economic geology (4)
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hydrogen
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igneous rocks
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plutonic rocks
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diabase (1)
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gabbros (2)
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pegmatite (1)
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ultramafics (2)
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volcanic rocks
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basalts
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mid-ocean ridge basalts (3)
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pyroclastics
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ash-flow tuff (1)
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intrusions (1)
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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)
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Pb-208/Pb-204 (3)
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Rb-87/Sr-86 (1)
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Sm-147/Nd-144 (1)
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Th-232 (1)
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U-238 (1)
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stable isotopes
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D/H (1)
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Nd-144/Nd-143 (4)
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O-18/O-16 (1)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (3)
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Pb-208/Pb-204 (3)
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Rb-87/Sr-86 (1)
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S-34/S-32 (2)
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Sm-147/Nd-144 (1)
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Sr-87/Sr-86 (3)
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lava (2)
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magmas (3)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Albian (1)
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metal ores
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base metals (1)
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chromite ores (1)
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copper ores (4)
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gold ores (3)
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lead ores (2)
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lead-zinc deposits (2)
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molybdenum ores (1)
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silver ores (1)
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uranium ores (1)
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zinc ores (6)
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metals
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actinides
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thorium
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Th-232 (1)
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uranium
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U-238 (1)
-
-
-
alkali metals
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rubidium
-
Rb-87/Sr-86 (1)
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-
-
alkaline earth metals
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strontium
-
Rb-87/Sr-86 (1)
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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-208/Pb-204 (3)
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platinum group (2)
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rare earths
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neodymium
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Nd-144/Nd-143 (4)
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Sm-147/Nd-144 (1)
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samarium
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Sm-147/Nd-144 (1)
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metamorphic rocks (1)
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metamorphism (1)
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metasomatism (5)
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mineral deposits, genesis (8)
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North America
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Canadian Shield
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Superior Province
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Abitibi Belt (1)
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Uchi Subprovince (1)
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Wawa Belt (2)
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Great Lakes
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Lake Superior (1)
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Keweenawan Rift (1)
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ocean floors (2)
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oxygen
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O-18/O-16 (1)
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Pacific Ocean
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East Pacific
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East Pacific Rise (1)
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Galapagos Rift (2)
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Northeast Pacific
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Axial Seamount (2)
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Cobb Seamount (1)
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Juan de Fuca Ridge
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Endeavour Ridge (1)
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North Pacific
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Northeast Pacific
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Axial Seamount (2)
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Cobb Seamount (1)
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Juan de Fuca Ridge
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Endeavour Ridge (1)
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paragenesis (1)
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petrology (3)
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plate tectonics (2)
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Precambrian
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Animikie Group (1)
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Archean
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Amisk Group (1)
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Neoarchean (2)
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Missi Group (1)
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upper Precambrian
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Proterozoic
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Mesoproterozoic (1)
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Paleoproterozoic
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Aphebian (1)
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sea water (1)
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sea-floor spreading (3)
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sedimentary rocks
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chemically precipitated rocks
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iron formations
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banded iron formations (1)
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clastic rocks
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sedimentation (1)
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sediments (1)
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South America
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sulfur
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S-34/S-32 (2)
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tectonics (2)
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tectonophysics (1)
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sedimentary rocks
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sedimentary rocks
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chemically precipitated rocks
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banded iron formations (1)
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clastic rocks
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red beds (1)
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volcaniclastics (1)
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sedimentary structures
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mounds (1)
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sediments
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sediments (1)
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volcaniclastics (1)
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Acceptance of the R. A. F. Penrose Gold Medal for 2014
Society of Economic Geologists Ralph W. Marsden Award for 2014 Citation of Mark D. Hannington
Geodynamic setting, crustal architecture, and VMS metallogeny of ca. 2720 Ma greenstone belt assemblages of the northern Wawa subprovince, Superior Province
Geodynamic Reconstruction of the Winston Lake Greenstone Belt and VMS Deposits: New Trace Element Geochemistry and U-Pb Geochronology
Volcanic Stratigraphy and Geochronology of the Cretaceous Lancones Basin, Northwestern Peru: Position and Timing of Giant VMS Deposits
Sulfide saturation mechanisms in gabbroic intrusions in the Nipigon Embayment
Radiogenic isotope characteristics of the Mesoproterozoic intrusive rocks of the Nipigon Embayment, northwestern Ontario
A synopsis of mineral deposits in the Archean and Proterozoic rocks of the Lake Nipigon Region, Thunder Bay District, Ontario
Abstract The Cretaceous Tambogrande volcanogenic massive sulfide (VMS) deposits of northwestern Peru represent some of the largest Cu-Zn-Au-Ag bimodal-mafic VMS deposits in the world. There are currently three known deposits each with approximately 100 million metric tons (Mt) of massive pyrite-rich sulfide. The deposits are intimately associated with dacite lava dome complexes and were deposited within steep-sided basins on the sea floor. Reconstructed sea-floor paleogeomorphic models suggest that sulfide deposition was concentrated in the deepest parts of the basins. Sulfide deposition accompanied synvolcanic faulting and episodic dacitic and basaltic eruptions. A series of time-stratigraphic horizons are defined at the TG1 and TG3 deposits and mark stages in the development of the volcanic complex and massive sulfide bodies. There is only limited evidence for replacement of host rocks during formation of the Tambogrande deposits, in contrast to many other large massive sulfide deposits. The deposits at Tambogrande resulted from focused hydrothermal fluid flow along synvolcanic faults with deposition of sulfide minerals within deep and restricted basins. These depressions, the results of the structural and volcanologic setting, acted as efficient traps for sulfide deposition and were also important for the preservation of the sulfide masses as they acted to shield them from submarine oxidation and weathering. Steep basins and episodic bimodal lava eruptions are key geologic attributes of the depositional setting at Tambogrande and may be necessary for the formation of anomalously large VMS deposits in a volcanic-rock–dominated environment.