PROTEROZOIC-PALEOZOIC SEQUENCE STRATIGRAPHY IN THE TAIZI RIVER BASIN OF LIAONING PROVINCE
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摘要: 太子河盆地元古宇-古生界划分为23个三级层序,归并为3个二级超层序,分别命名为偏岭超层序(Qn)、太子河超层序(∈-O)和牛心台超层序(C-P).本文对各层序的特征、界面性质、沉积相和相序等作了较详细的描述;对石炭-二叠纪陆相地层,尝试使用不同于海相地层的层序地层学术语;对太子河盆地的演化阶段及其特征作了划分和总结.这是首次对太子河盆地进行的层序地层学研究.Abstract: In the Taizi River basin, 23 sequences (orthosequence)are recognized in the strata from Late Proterozoic (Qing-baikou System)to Paleozoic (Cambrian-Permian System), and may be merged into 3 supersequences. They are named as the Pianling supersequence (Qn), the Taizihe supersequence (∈-O), and the Niuxintai supersequence (C-P). This paper introduces and describes the general features, sequence boundary surface, sedimentary facies and facies sequence of each se-quence and supersequence. Some special terms different from that of the marine sequence stratigraphy are applied to describe the Carboniferous-Permian terrestrial sequences of the region. Finally, the evolution and development of the Taizi River basin are summarized and divided into 4 stages:1)siliciclastic sea shore stage; 2)terrigenous clastic pedestal stage; 3)carbonate platform stage;and 4)basin shriveling and withering away stage. Actually, this is the first study of sequence stratigraphy in the Taizi River basin up to date.
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Key words:
- Taizi River basin /
- Proterozoic-Paleozoic /
- sequence stratigraphy /
- Liaoning Province
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