Geochemical characteristics of trace elements in limestone of the Neoproterozoic Wangshan Formation in northern Anhui Province
Chen Song1，2 Fu Xuehai1，3 Gui Herong2 Sun Linhua2
1 The School of Resource and Earth Science，China University of Mining and Technology，Xuzhou 221116，Jiangsu;2 School of Earth Sciences and Engineering，Suzhou University，Suzhou 234000，Anhui;3 College of Geology and Exploration Engineering，Xinjiang University，rümqi 830046，Xinjiang
To understand the geochemical characteristics of limestone from the Neoproterozoic Wangshan Formation and its geological background， petrological and trace elemental analyses had been carried out for the limestone collected from the Neoproterozoic Wangshan Formation in northern Anhui Province.The results showed that: the elements of U，Pb，Sr，Sm in the limestone are rich，while Nb，Pr，Zr，Hf arepoor; the REE in limestone from the Wangshan Formation are characterized by the lower total REE(6.68～42.78 μg/g)，light LREE depletion(NdSN/YbSN=0.65～0.91)，slight fractionation between LREE and HREE，and various degree in positive La and Y anomaly.It can be inferred that the ancient seawater is anoxic and high salinity，and the palaeoclimate is drought by the information from U，Th，V，Sr/Ba and Sr/Cu，respectively.The limestone from the Wangshan Formation might be deposited in the continental arc environment indicated by diagrams of the La-Th-Sc and Th-Sc-Zr/10.
Chen Song,Fu Xuehai,Gui Herong et al. Geochemical characteristics of trace elements in limestone of the Neoproterozoic Wangshan Formation in northern Anhui Province[J]. JOPC, 2012, 14(6): 813-820.
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