| Stratigraphic Geochemistry of Upper—Middle Proterozoic Suberathem in Northern Guangxi,China |
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| 引用本文： | 阎明,刘英俊,等.Stratigraphic Geochemistry of Upper—Middle Proterozoic Suberathem in Northern Guangxi,China[J].中国地球化学学报,1995,14(3):231-242. |
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| 作者姓名： | 阎明 刘英俊 |
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| 作者单位： | [1]DepartmentofEarthSciences,NanjingUniversity,Nanjing210008 [2]DepartmentofEarthSciences,NanjingUniversity |
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| 摘 要： | The Upper-Middle Proterozoic epimetamorphic rock series in northern Guangxi is a suite of volcanic-terrigenous clastic formations transforming in facies from mobile to stable, which is similar to Eparchean normal argillo-arenaceous sediments both in petrochemistry and in REE geochemistry.The Upper-Middle Proterozoic Suberathem in northern Guangxi is characterized by primordial enrichment of As and Sb, significant depletion in Sr and Hg, bimodal or polymodal distribution of Au and other ore-forming elements, and high variation coefficients and strong mobilities of Sn,Cu,Ni,Au,Ag,As and Sb.The trace element association is characterized by the predominance of siderophile and chalcophile elements occurring in the Middle Proterozoic and that of lithophile ele-ments occurring in the Upper Proterozoic .It is suggested that in northern Guangxi is developed a series of ore-bearing formations with the Sibao Group as the protogenous basement and the Danzhou Group and Lower Sinian series as the derivative cap strata.
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| 关 键 词： | 原生界 广西 浅成变质作用 地层地球化学 示踪元素 |
Stratigraphic geochemistry of Upper-Middle Proterozoic Suberathem in northern Guangxi,China |
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| Yan Ming,Liu Yingjun,Ma Dongsheng.Stratigraphic geochemistry of Upper-Middle Proterozoic Suberathem in northern Guangxi,China[J].Chinese Journal of Geochemistry,1995,14(3):231-242. |
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| Authors: | Yan Ming Liu Yingjun Ma Dongsheng |
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| Institution: | (1) Department of Earth Sciences, Nanjing University, 210008 Nanjing |
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| Abstract: | The Upper-Middle Proterozoic epimetamorphic rock series in northern Guangxi is a suite of volcanic-terrigenous clastic formations
transforming in fades from mobile to stable, which is similar to Eparchean normal argillo-arenaceous sediments both in petrochemistry
and in REE geochemistry. The Upper-Middle Proterozoic Suberathem in northern Guangxi is characterized by primordial enrichment
of As and Sb, significant depletion in Sr and Hg, bimodal or polymodal distribution of Au and other ore-forming elements,
and high variation coefficients and strong mobilities of Sn, Cu, Ni, Au, Ag, As and Sb. The trace element association is characterized
by the predominance of siderophile and chalcophile elements occurring in the Middle Proterozoic and that of lithophile elements
occurring in the Upper Proterozoic. It is suggested that in northern Guangxi is developed a series of ore-bearing formations
with the Sibao Group as the protogenous basement and the Danzhou Group and Lower Sinian series as the derivative cap strata.
This project was granted by the National Natural Science Foundation of China (9488010) and the Ph.D. Foundation of the State
Education Commission. Translated by the Hua Zihao |
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| Keywords: | Proterozoic Erathem stratigraphic geochemistry trace element Guangxi |
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