J4 ›› 2015, Vol. 21 ›› Issue (4): 701-.
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SUN Zehang, HU Kai, HAN Shanchu, Liu Yin
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Abstract:
ThebaritedepositsformedintheearlyCambrianinXinhuangandTianzhuarethelargestbaritedepositintheworldandare representativeintheglobalscope.Thisstudycarriedouttherareearthelementsandsulfurisotopeanalysesofthesebaritedeposits.All thesample'sV/CrandU/ThvaluesandtheCenegativeanomalyimpliedthatthedepositswereformedinanaerobicandreduction environment.TherareearthelementsofbaritehaveobviouslyEuelementpositiveanomaly,indicatingthattheore-formingprocesswas stronglyaffectedbytheseafloorhydrothemalfluidandthesourceofthebariumismainlyfromtheseafloorhydrothemalmaterial;The sulfurisotopecompositionofBaSO4mainlyrangedfrom+40‰to+45‰,enrichedin34SandthesulfurisotopeofBaSO4ischaracterized bytowerstyledistribution,whichindicatesthatthesourceofsulfurisofsingle-sourceandfromtheseawatersulfate.Theδ34Sofpyrite islowerthantheδ34Softhecontemporaryseawater,indicatingthatbiologicalbacteriaplayedanimportantroleinthesulfatereduction intheseawaterandimplythatthebaritedepositformedinanenvironmentwherethereislimitedseawaterexchange.Basedontheaboveanalysis,thebaritedepositwasformedinasemiclosed-closedlagoonalandanaerobicenvironmentwheretherearefrequent seafloorhydrothermalactivities.
Key words: :baritedeposits;traceelements;rareearthelements;sulfurisotope;Xinhuang;Tianzhu
SUN Zehang, HU Kai, HAN Shanchu, Liu Yin. TraceandRareEarthElementsandSulfurIsotopeAnalysisofBarite DepositsinWestHunanandEastGuizhou[J]. J4, 2015, 21(4): 701-.
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URL: https://geology.nju.edu.cn/EN/
https://geology.nju.edu.cn/EN/Y2015/V21/I4/701