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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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Burma (2)
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China
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Da Hinggan Ling (1)
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Datong China (1)
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Hubei China (2)
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Jiangsu China (1)
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North China Platform (1)
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Qinling Mountains (1)
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Yangtze Platform (1)
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Yunnan China
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Ailao Shan (1)
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Tengchong (1)
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Luzon Arc (1)
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Philippine Islands
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Luzon
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Bataan Philippine Islands (1)
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Vietnam (1)
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Southeast Asia (1)
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International Ocean Discovery Program
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Expedition 349
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IODP Site U1433 (1)
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IODP Site U1434 (1)
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Pacific Ocean
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North Pacific
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Northwest Pacific
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South China Sea
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Manila Trench (1)
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Yinggehai Basin (1)
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West Pacific
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Northwest Pacific
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South China Sea
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Manila Trench (1)
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commodities
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metal ores
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tungsten ores (2)
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mineral deposits, genesis (3)
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elements, isotopes
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boron
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chemical elements (2)
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halogens
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isotope ratios (7)
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isotopes
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stable isotopes
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B-11/B-10 (1)
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Hf-177/Hf-176 (1)
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O-18/O-16 (4)
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Sr-87/Sr-86 (4)
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Lu/Hf (2)
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metals
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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 (4)
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copper (1)
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hafnium
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molybdenum (2)
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niobium (1)
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platinum group
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platinum (1)
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rare earths
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neodymium
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Nd-144/Nd-143 (2)
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tantalum (1)
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oxygen
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O-18/O-16 (4)
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geochronology methods
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Lu/Hf (2)
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Re/Os (2)
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U/Pb (6)
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geologic age
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Cenozoic
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Tertiary
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upper Precambrian
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igneous rocks
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ultramafics
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pyroxenite (2)
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volcanic rocks
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glasses
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rutile (1)
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framework silicates
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orthosilicates
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olivine group
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olivine (2)
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zircon group
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zircon (7)
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sulfides
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molybdenite (1)
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tungstates
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scheelite (1)
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wolframite (2)
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Primary terms
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absolute age (5)
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Asia
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Far East
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Burma (2)
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China
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Da Hinggan Ling (1)
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Datong China (1)
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Hubei China (2)
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Jiangsu China (1)
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North China Platform (1)
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Qinling Mountains (1)
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Yangtze Platform (1)
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Yunnan China
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Ailao Shan (1)
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Tengchong (1)
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Luzon Arc (1)
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Philippine Islands
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Luzon
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Bataan Philippine Islands (1)
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Vietnam (1)
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Southeast Asia (1)
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boron
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B-11/B-10 (1)
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Cenozoic
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Quaternary
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Pleistocene (1)
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Tertiary
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Neogene
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Miocene (2)
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Pliocene (1)
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chemical analysis (1)
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crust (3)
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geophysical methods (1)
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igneous rocks
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plutonic rocks
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diabase (1)
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diorites (1)
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gabbros (2)
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granites
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A-type granites (1)
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two-mica granite (1)
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granodiorites
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granodiorite porphyry (1)
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ultramafics
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pyroxenite (2)
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volcanic rocks
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adakites (2)
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basalts
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mid-ocean ridge basalts (2)
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glasses
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palagonite (1)
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intrusions (1)
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isotopes
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stable isotopes
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B-11/B-10 (1)
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Hf-177/Hf-176 (1)
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Nd-144/Nd-143 (2)
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O-18/O-16 (4)
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Sr-87/Sr-86 (4)
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magmas (4)
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mantle (3)
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Mesozoic
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Cretaceous
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Lower Cretaceous (1)
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Triassic
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Lower Triassic (2)
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Middle Triassic (1)
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Upper Triassic (1)
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metal ores
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copper ores (2)
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iron ores (1)
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molybdenum ores (1)
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tin ores (2)
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tungsten ores (2)
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metals
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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 (4)
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copper (1)
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hafnium
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Hf-177/Hf-176 (1)
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molybdenum (2)
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niobium (1)
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platinum group
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platinum (1)
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rare earths
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neodymium
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Nd-144/Nd-143 (2)
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tantalum (1)
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metamorphic rocks
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metasomatic rocks
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greisen (1)
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skarn (1)
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metasomatism (4)
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mineral deposits, genesis (3)
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ocean basins (1)
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oxygen
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O-18/O-16 (4)
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Pacific Ocean
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Northwest Pacific
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South China Sea
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Yinggehai Basin (1)
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West Pacific
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Northwest Pacific
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South China Sea
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Manila Trench (1)
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Paleozoic
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Devonian (1)
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Permian
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Upper Permian (2)
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placers (1)
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plate tectonics (3)
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Precambrian
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upper Precambrian
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Proterozoic
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Paleoproterozoic (1)
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sediments
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marine sediments (1)
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spectroscopy (1)
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tectonics (1)
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rock formations
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Emeishan Basalts (1)
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sediments
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sediments
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marine sediments (1)
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Silicate liquid immiscibility in the Chang’e 5 lunar mare magmas: constraints on the petrogenesis of lunar granitic rocks
Iron isotope fractionation during transcrustal magmatic differentiation: Implications for continental crustal formation in subduction zones
Molybdenum isotopes demonstrate that multistage upgrading is required to generate heavy rare earth element–enriched carbonatites
A modified genetic model for multiple pulsed mineralized processes at the giant Qulong porphyry Cu-Mo mineralization system
Excessive subsidence of oceanic basins caused by recycled oceanic crust in the mantle source: A new perspective on the oceanic topography within Southeast Asia
Molybdenum isotopic fractionation in the Panzhihua mafic layered intrusion in the Emeishan large igneous province, southwest China
Melting and melt segregation processes controlling granitic melt composition
The effect of elemental diffusion on the application of olivine-composition-based magmatic thermometry, oxybarometry, and hygrometry: A case study of olivine phenocrysts from the Jiagedaqi basalts, northeast China
Heavy Mo isotope composition of northern Bataan adakites, Philippines: Evidence for fore-arc subduction erosion?
The efficiency of copper extraction from magma bodies: Implications for mineralization potential and fluid-silicate melt partitioning of copper
GEOCHRONOLOGY OF Sn MINERALIZATION IN MYANMAR: METALLOGENIC IMPLICATIONS
Raman spectroscopy-based screening of zircon for reliable water content and oxygen isotope measurements
Zircon U–Pb dating and geochemistry of intrusive rocks in the Shangdan suture zone of the Qinling Orogenic Belt: petrogenesis and tectonic implications
Two magma fractionation paths for continental crust growth: Insights from the adakite-like and normal-arc granites in the Ailaoshan fold belt (SW Yunnan, China)
Element mobility and oxygen isotope systematics during submarine alteration of basaltic glass
Abstract Cenozoic intraplate basalts are widespread above the Big Mantle Wedge (BMW) and its front in East Asia. While the mantle source lithology and redox-hydration state have been demonstrated to be crucial in the generation of basalts above the BMW, their nature and role in the basalts above the front of the BMW is poorly constrained. To address this, we report olivine compositions of the Quaternary Datong basalts. Datong basalts exhibit ocean island basalt-like trace-element compositions and depleted Sr–Nd isotopes with slightly enriched signatures (enriched mantle I, EMI) for tholeiitic basalts. Olivines of the Datong basalts show high Ni and Fe/Mn, and low Ca, Mn and Mn/Zn values, pointing to a pyroxenite source. Applying V and Ca partition coefficients between olivine and whole rock, respectively, the Datong basalts lie −0.44 to 0.64 log units above the fayalite–magnetite–quartz buffer for f O 2 , and contain 2.1–3.4 wt% H 2 O but highly variable H 2 O/Ce values (265–1498). Both f O 2 and H 2 O/Ce in the basalts vary with whole-rock and olivine compositions, indicating that the source was the main control. Thus, there is a heterogeneous redox–hydration state in the source, the EMI component being relatively reduced but extremely wet and recycled oceanic crust being relatively oxidized but dry. The extremely wet EMI component was probably derived from the mantle transition zone. In the light of our findings, we propose a model in which mantle upwelling carried the recycled oceanic crust and EMI component from the mantle transitional zone to shallow mantle, owing to the Pacific slab stagnating in the mantle transitional zone, to form pyroxenite, which subsequently melted to generate Datong basalts.