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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Far East
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China
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North China Platform (1)
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Philippine Islands
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Luzon
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Bataan Philippine Islands (1)
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United States
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New Mexico (1)
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Texas
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West Texas (1)
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elements, isotopes
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carbon
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C-13/C-12 (1)
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isotope ratios (4)
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isotopes
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radioactive isotopes
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Pb-206/Pb-204 (1)
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Pb-208/Pb-204 (1)
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stable isotopes
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C-13/C-12 (1)
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Fe-57/Fe-54 (1)
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Hf-177/Hf-176 (1)
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Li-7/Li-6 (2)
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Pb-206/Pb-204 (1)
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Pb-208/Pb-204 (1)
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S-34/S-32 (1)
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Sr-87/Sr-86 (1)
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metals
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alkali metals
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lithium
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Li-7/Li-6 (2)
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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 (1)
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hafnium
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Hf-177/Hf-176 (1)
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iron
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Fe-57/Fe-54 (1)
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lead
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Pb-206/Pb-204 (1)
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Pb-208/Pb-204 (1)
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rare earths
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neodymium (1)
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sulfur
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S-34/S-32 (1)
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geochronology methods
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U/Pb (2)
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geologic age
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Cenozoic
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Tertiary
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Paleogene
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lower Paleogene (1)
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Mesozoic
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Paleozoic
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Precambrian
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upper Precambrian
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Dengying Formation (1)
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Doushantuo Formation (1)
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Sinian
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Doushantuo Formation (1)
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igneous rocks
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igneous rocks
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plutonic rocks
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gabbros (1)
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granites (1)
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granodiorites (1)
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monzonites (1)
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ultramafics
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peridotites (2)
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volcanic rocks
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andesites (1)
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basalts
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mid-ocean ridge basalts (1)
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ocean-island basalts (1)
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meteorites
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meteorites
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stony meteorites
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achondrites
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chassignite
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shergottite (1)
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chondrites (1)
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minerals
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carbonates (1)
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silicates
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orthosilicates
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nesosilicates
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zircon group
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zircon (2)
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sulfates
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barite (1)
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Primary terms
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absolute age (2)
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Asia
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Far East
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China
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North China Platform (1)
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Philippine Islands
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Luzon
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Bataan Philippine Islands (1)
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carbon
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C-13/C-12 (1)
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Cenozoic
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Tertiary
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Paleogene
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lower Paleogene (1)
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crust (2)
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geochemistry (2)
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igneous rocks
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plutonic rocks
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gabbros (1)
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granites (1)
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granodiorites (1)
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monzonites (1)
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ultramafics
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peridotites (2)
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-
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volcanic rocks
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andesites (1)
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basalts
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mid-ocean ridge basalts (1)
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ocean-island basalts (1)
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-
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inclusions (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 (1)
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Pb-208/Pb-204 (1)
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stable isotopes
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C-13/C-12 (1)
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Fe-57/Fe-54 (1)
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Hf-177/Hf-176 (1)
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Li-7/Li-6 (2)
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Pb-206/Pb-204 (1)
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Pb-208/Pb-204 (1)
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S-34/S-32 (1)
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Sr-87/Sr-86 (1)
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lava (1)
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mantle (2)
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Mesozoic
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Jurassic (1)
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Triassic
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Lower Triassic (1)
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Middle Triassic (1)
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metals
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alkali metals
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lithium
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Li-7/Li-6 (2)
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-
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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 (1)
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-
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hafnium
-
Hf-177/Hf-176 (1)
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iron
-
Fe-57/Fe-54 (1)
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lead
-
Pb-206/Pb-204 (1)
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Pb-208/Pb-204 (1)
-
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rare earths
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neodymium (1)
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-
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metamorphism (1)
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metasomatism (1)
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meteorites
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stony meteorites
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achondrites
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Martian meteorites
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SNC Meteorites
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chassignite
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Chassigny Meteorite (1)
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shergottite (1)
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-
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chondrites (1)
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-
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Moon (1)
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orogeny (1)
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paleoclimatology (1)
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Paleozoic
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Carboniferous
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Upper Carboniferous (1)
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Permian
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Upper Permian (1)
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-
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plate tectonics (1)
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Precambrian
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upper Precambrian
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Proterozoic
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Neoproterozoic
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Dengying Formation (1)
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Doushantuo Formation (1)
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Ediacaran (1)
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Sinian
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Dengying Formation (1)
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Doushantuo Formation (1)
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sea water (1)
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sedimentary rocks
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clastic rocks
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sandstone (1)
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sulfur
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S-34/S-32 (1)
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thermal waters (1)
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United States
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New Mexico (1)
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Texas
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West Texas (1)
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weathering (1)
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sedimentary rocks
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sedimentary rocks
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clastic rocks
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sandstone (1)
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Dynamic interplay of biogeochemical C, S and Ba cycles in response to the Shuram oxygenation event
ERRATUM: Sub-arc xenolith Fe-Li-Pb isotopes and textures tell tales of their journey through the mantle wedge and crust
Sub-arc xenolith Fe-Li-Pb isotopes and textures tell tales of their journey through the mantle wedge and crust
Early Paleogene fluvial regime shift in response to global warming: A subtropical record from the Tornillo Basin, west Texas, USA
Lithium Isotope Geochemistry
Mineral Evolution: Episodic Metallogenesis, the Supercontinent Cycle, and the Coevolving Geosphere and Biosphere
Abstract Analyses of temporal and geographic distributions of the minerals of beryllium, boron, copper, mercury, and molybdenum reveal episodic deposition and diversification. We observe statistically significant increases in the number of reported mineral localities and/or the appearance of new mineral species at ~2800 to 2500, ~1900 to 1700, ~1200 to 1000, ~600 to 500, and ~430 to 250 Ma. These intervals roughly correlate with presumed episodes of supercontinent assembly and associated collisional orogenies of Kenorland (which included Superia), Nuna (a part of Columbia), Rodinia, Pannotia (which included Gondwana), and Pangea, respectively. In constrast, fewer deposits or new mineral species containing these elements have been reported from the intervals at ~2500 to 1900, ~1700 to 1200, 1000 to 600, and 500 to 430 Ma. Metallogenesis is thus relatively sparse during periods of presumed supercontinent stability, breakup, and maximum dispersion. Variations in the details of these trends, such as comparatively limited Hg metallogenesis during the assumed period of Rodinia assembly; Proterozoic Be and B mineralization associated with extensional environments; Proterozoic Cu, Zn, and U deposits at ~1600 and 830 Ma; and Cenozoic peaks in B, Cu, and Hg mineral diversity, reveal complexities in the relationship between episodes of mineral deposition and diversification on the one hand, and supercontinent assembly and preservational biases on the other. Temporal patterns of metallogenesis also reflect changing near-surface environments, including differing degrees of production and preservation of continental crust; the shallowing geotherm; changing ocean chemistry; and biological influences, especially those associated with atmospheric oxygenation, biomineralization, and the rise of the terrestrial biosphere. A significant unresolved question is the extent to which these peaks in metallogenesis reflect true episodicity, as opposed to preservational bias.