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湖相烃源岩Ro异常与无机元素相关性初探
陈中红等。地球化学,2007,36(3):275-278
对东营凹陷牛38井主力烃源岩段沙河街三段Ro值与对应的无机元素含量进行了相关性分析,结果表明:牛38井沙河街组烃源岩中,钾、钠、锌、镍、镁、锂、钡、钴、铷等无机元素含量与Ro值分布总体呈正相关性,其中钾、钠、铷等强碱金属元素含量与Ro值正相关性相对较强;钙、锶、锰等金属元素含量与Ro值总体呈负相关性;铁、硼含量与Ro值相关性差。
关键词:湖相烃源岩,Ro异常,无机元素,有机质演化,东营凹陷
Correlation between inorganic elements and abnormal vitrinite reflectance in the lacustrine source rocks
Chen Zhonghong, GEOCHIMICA,2007,36(3):275-278
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To investigate the correlation between the inorganic elements and the abnormal vitrinite reflectance(VRo), the Member 3 of Shahejie Formation is closely surveyed and analyzed. The results shows: the contents of K, Na, Zn, Ni, Mg, Li, Ba, Co, Rb have positive correlation with the value of VRo in the whole, especially for the strong alkali metals including K, Na and Rb show high positive correlation; the contents of Ca, Sr and Mn have negative correlation with the value of VRo in the whole; the contents of Fe and B have no correlation with the value of VRo for its little variety.
Key words: source rocks of lacustrian source rocks, abnormal vitrinite reflectance, inorganic elements, organic matter evolution, Dongying depression.
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