Paleozoic Stratigraphy in the Qiangtang Region of Tibet: Relations of the Gondwana and Yangtze Continents and Ocean Closure Near the End of the Carboniferous
Paleozoic Stratigraphy in the Qiangtang Region of Tibet: Relations of the Gondwana and Yangtze Continents and Ocean Closure Near the End of the Carboniferous
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DOI：
10.1080/00206819309465558
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发表时间：
1993-09
影响因子：
2.6
通讯作者：
Cai Li;A. Zheng
中科院分区：
文献类型：
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作者：
Cai Li;A. Zheng
通过对改则地区古生界的野外观察和邻区已知古生界的记录相结合，确定了北方和南部羌塘的古生界层序。早期作者的前泥盆纪Gemuri群被划分，不再推荐使用该术语。南羌塘晚古生代岩石组合、地质构造和生物群具有冈瓦纳古陆冰川特征，而北方羌塘晚古生代岩石组合、地质构造和生物群与古特提斯更相似。这两个组合分别代表了冈瓦纳大陆的北方边缘和扬子大陆的西南边缘。这两个大陆被认为在石炭纪早期开始分离，并在二叠纪早期重新结合。在这一事件循环中，北方羌塘处于被动边缘，而南方羌塘岩石显示出活动边缘发育的证据。南羌塘的玄武岩是典型的玄武岩。
Paleozoic sequences are defined for the northern and southern Qiangtang by linking field observations in the Gaize Province to the known Paleozoic record in neighboring areas. The pre-Devonian Gemuri Group of earlier authors is divided and the use of that term is no longer recommended. The upper Paleozoic rock assemblages, geological structures, and biota of the southern Qiangtang are of Gondwana glacial aspect, but those of the northern Qiangtang show more resemblance to those of the ancient Tethys. The two assemblages are interpreted as representing, respectively, the northern margin of Gondwanaland and the southwestern margin of the Yangtze continent. The two continents are suggested to have begun to separate during the Early Carboniferous and to have rejoined in the earliest Permian. Throughout this cycle of events, the northern Qiangtang occupied a passive margin while the southern Qiangtang rocks show evidence of the development of an active margin. Basaltic rocks from the southern Qiangtang are ind...