Rare earth element(REE) geochemistry of phosphorites of the Sonrai area of Paleoproterozoic Bijawar basin,Uttar Pradesh,India

查看全文 作　　者：[1]K.F.Khan;Shamim [1]A.Dar;Saif [1]A.Khan

机构地区：[1]Department of Geology,Aligarh Muslim University,Aligarh-202002,Uttar Pradesh,India

出　　处：《Journal of Rare Earths》索引2012年第30卷第5期,共8页

摘　　要：The rare earth element(REE) data from the Paleoproterozoic Bijawar basin,Sonrai phosphorites were used to interpret the depositional conditions of the phosphorites.The post archean Australian shales(PAAS) normalized REE patterns of the Sonrai phosphorites were characterized by negative Ce and positive Eu anomalies.Middle rare earth elements(MREE)-enrichment was a characteristic feature.Phosphorites showing the diagenetic effects on the REE patterns were limited.The observed Eu anomaly was indicative of an anoxic(or sulphate reducing) diagenetic environment of phosphate formation.Mixing of sea water and upwelling during the Paleoproterozoic was responsible for the recording of positive Eu and negative Ce anomalies in the Sonrai phosphorites. 关键词：稀土元素古元古代磷酸盐地球化学盆地北方印度负异常

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Rare earth element(REE) geochemistry of phosphorites of the Sonrai area of Paleoproterozoic Bijawar basin,Uttar Pradesh,India

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引证文献(4)

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