现代地质2011，Vol.25Issue(6)：1059-1065,7.
黔南坳陷上震旦统灯影组地球化学特征及沉积环境意义
Geochemical Characteristics and Environmental Significance of Dengying Formation of Upper Sinian in Qiannan Depression
摘要
Abstract
The dolomite deposited in the Dengying Formation of Upper Sinian in the Qiannan Depression. Based on the actual measurement the Yangtiaozhai section, Majiang, we used the geochemical analyses to discuss the sedimentary geochemistry characteristics and the palaeosedimentary environment significance of Dengying Formations. The results indicated;(1) CaO and MgO remarkably positively correlated with each other;SiO2 negatively correlated with CaO and MgO;Sr negatively correlated with MgO, and positively correlated with Al2O3, K2O, Na2O, TiO2, P2O5, Tfe;V, Al2O3, K2O, TiO2, Tfe and P2O5 positively correlated with each other;Mn weakly positively correlated with Tfe. (2) The content of Sr and the value of 1,000×Sr/Ca increased with the depth of sedimentary water, regarded as the mark of the palaeobathymetric and succession boundary. (3)The analytic results of the ratios of Sr/Ba, MgO/Al2O3, MgO/CaO and V/(V + Ni) revealed that the palaeosedimentary environments of Dengying Formation is ocean sediments which was formed in reducing environment of continental sea in hot arid climate, and with the detrital material of terrigenous origin. Especially , the second member of Dengying Formation was formed in the deepest water environment and the paleosa-linity of the fifth member of Dengying Formation is the highest;The geochemical characteristics and the sedimentary environment are closely correlated, and the geochemical characteristics can be regarded as an important mark in the sedimentary phase analyses.关键词
黔南坳陷/上震旦统/灯影组/地球化学特征/沉积环境Key words
Qiannan Depression/Upper Sinian/Dengying Formation/geochemical characteristic/sedimentary environment分类
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王鹏万,陈子炓,李娴静,程刚,贺训云,徐政语,马立桥,董庸,黄羚..黔南坳陷上震旦统灯影组地球化学特征及沉积环境意义[J].现代地质,2011,25(6):1059-1065,7.基金项目
全国油气资源战略选区调查与评价项目(XQ-2007-01) （XQ-2007-01）
中国石油科技部油气勘探新区、新领域综合性研究项目(2009A-0610). （2009A-0610）
