PROTEROZOIC-PALEOZOIC SEQUENCE STRATIGRAPHY IN THE TAIZI RIVER BASIN OF LIAONING PROVINCE

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.