Organic Geochemistry Characteristics of Marine Dark Mudstone in the Middle Permian Zhesi Formation in Suolun Area of space prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on"><st1:City w:st="on">Inner Mongoliast1:City>, <st1:country-region w:st="on">Chinast1:country-region>st1:place>

详细信息   

• 责任者：Song Tushun (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Zhu Zhanping
• 刊名：Geological Bulletin of China
• 出版年：2011
• 卷期：30(2-3)
• 关键词：泥岩 ; mudstone ; 烃源岩 ; source rocks ; 有机地球化学 ; organic geochemistry ; 内蒙古 ; Inner Mongolia
• 页码：p.300-307
• 图表：6 illus., 2 tables, 27 refs.
• 分类号：1003
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

摘要

Based on the lithologic features, precipitation facie and organic geochemistry characteristics of dark mudstone of Middle Permian Zhesi Formation, the authors summarize organic matter abundance, kerogen type and thermal evolution characteristics. The total thickness of dark mudstone is 640 m. The content of TOC is between 0.38~1.78%, and samples of TOC values more than 0.6% account for 98%. The kerogen type is dominated by Ⅱ-Ⅲ type, Tmax values are 354~548 ℃, and the average vitrinite reflectance is 3.28%, which shows that kerogen has turned into high-extra evolution stage. In the study we also found that S1＋S2（〈3.2mg/g） and Ix （〈16mg/g· c） are very low. The reason is generating rock of weathering, has lived through the thermal evolution and hydrocarbon expulsion. The hydrocarbon expulsion happened in Early Permian and Late Cretaceous.