湖相烃源岩R_o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R_o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R_o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R_o值正相关性相对较强；钙、锶、锰等金属元素含量与R_o值总体呈负相关性；铁、硼含量与R_o值相关性差。

 关键词：湖相烃源岩，R_o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

(China University of Petroleum, Dongying, Shandong, 257061)

To investigate the correlation between the inorganic elements and the abnormal vitrinite reflectance（VR_o）, 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 VR_o 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 VR_o in the whole; the contents of Fe and B have no correlation with the value of VR_o 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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