古地理学报 ›› 2023, Vol. 25 ›› Issue (4): 729-741. doi: 10.7605/gdlxb.2023.04.079

所属专题: 沉积岩石学进展

• “细粒沉积研究” 专题 •    下一篇

基于物质来源及成因的细粒沉积岩分类方案探讨*

操应长1,2, 梁超1,2, 韩豫2, 葸克来1,2, 王俊然2, 籍士超2, 梅俊芳2   

  1. 1 深层油气全国重点实验室(中国石油大学(华东)),山东青岛 266580;
    2 中国石油大学(华东)地球科学与技术学院,山东青岛 266580
  • 收稿日期:2023-06-20 出版日期:2023-08-01 发布日期:2023-08-11
  • 作者简介:操应长,男,1969年生,2003年获中国科学院广州地球化学研究所地球化学专业博士学位,现为中国石油大学(华东)教授,主要从事沉积学、油气储层地质学的教学和科研工作。E-mail: caoych@upc.edu.cn。
  • 基金资助:
    *国家自然科学基金(编号: 42272119,42072164)和山东省重点研发计划(编号: 2020ZLYS08)联合资助

Discussions on classification scheme for fine-grained sedimentary rocks based on sediments sources and genesis

CAO Yingchang1,2, LIANG Chao1,2, HAN Yu2, XI Kelai1,2, WANG Junran2, JI Shichao2, MEI Junfang2   

  1. 1 State Key Laboratory of Deep Oil and Gas(China University of Petroleum(East China)),Shandong Qingdao 266580,China;
    2 School of Geosciences,China University of Petroleum(East China),Shandong Qingdao 266580,China
  • Received:2023-06-20 Online:2023-08-01 Published:2023-08-11
  • About author:CAO Yingchang,born in 1969,obtained his Ph.D. degree in geochemistry from Guangzhou Institute of Geochemistry,Chinese Academy of Sciences in 2003. Currently he is a professor at China University of Petroleum(East China),mainly engaged in the teaching and scientific research of sedimentology and oil and gas reservoir geology. E-mail: caoych@upc.edu.cn.
  • Supported by:
    National Natural Science Foundation of China(Nos. 42272119,42072164)and the Key Research and Development Program of Shandong Province(No.2020ZLYS08)

摘要: 细粒沉积岩分类对细粒沉积岩系统深入研究至关重要,分类方案应当反映岩石组分物质来源、沉积作用方式,且具有广泛适用性。细粒沉积岩物质来源多样,包括陆源碎屑来源、盆内化学沉淀来源、生物源、火山碎屑来源。不同盆地细粒沉积岩的物质来源存在巨大差异,同一盆地同种矿物也通常具有成因多样性。细粒沉积岩作为一种特殊岩石类型,综合考虑物质来源和沉积作用方式,笔者提出了细粒沉积岩四组分三端元分类方案,根据有机质含量分为高、中、低3大类,以陆源碎屑物质、内源化学沉淀物质、火山碎屑物质进行三端元划分,分为4类: 陆源碎屑细粒岩类、化学细粒岩类、火山碎屑细粒岩类、混合细粒岩类;并根据三级命名原则、合并命名原则、复合命名原则,分为11个亚类,岩石名称可根据岩石组分的相对含量进行命名。

关键词: 细粒沉积岩, 物质来源, 组分来源-成因综合分类

Abstract: The classification of fine-grained sedimentary rocks is crucial for the deep and systematical study of the fine-grained sedimentary rocks. The classification scheme not only has to reflect the sources,sedimentation types of rock components,it also should be widely applicable. There are various sources of fine-grained sedimentary rocks, including terrigenous clastic sources, endogenic chemical precipitation sources, biological sources and volcanic clastic sources. Among different basins,there are significant differences in the sediment source of fine-grained sedimentary rocks;furthermore,in the same basin,the same mineral can also has multiple sources. Currently,there is no systematic classification scheme for fine-grained sedimentary rocks,a special type of rocks. Based on the components, sediment sources and sedimentation types,we propose a comprehensive four-component three-terminal classification scheme for fine-grained sedimentary rocks. Firstly,the sediment source is considered as the first principle,and three end-members, i.e.,terrestrial clastic substances,endogenic chemical precipitants,and volcanic clastic substances,are used to classify them into four types(terrigenous clastic fine-grained sedimentary rocks,chemical fine-grained sedimentary rocks,pyroclastic fine-grained sedimentary rocks,and mixed fine-grained sedimentary rocks), and according to the content of organic matter, the fine-grained sedimentary rocks can be further divided into three categories: high organic matter, medium organic matter and low organic matter. Secondly, fine-grained sedimentary rocks are divided into 11 subtypes following the three-level naming principle, combined naming principle and compound naming principle. Thus, fine-grained sedimentary rocks could be named according to the relative content of the components.

Key words: fine-grained sedimentary rock, sediments source, comprehensive classification based on composition source and genesis

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