摘要:
形成于晚石炭—二叠纪的华夏植物群主要发育在东亚,范围是中国华北、华南和塔里木以及印度支那等陆块。根据这些陆块的缝合时代以及陆块内石炭—二叠纪地层、古生物发育特征的研究,笔者认为这些陆块在石炭纪之前已聚合成一个大型陆块,本文将这个以华夏植物群为特征的大型陆块称为华夏大陆。该大陆位于安加拉大陆与冈瓦纳大陆之间的古特提斯洋中,并将其分为南、北两支。二叠纪晚期,华夏大陆向北漂移,至二叠纪末期,华夏大陆与安加拉大陆碰撞,形成天山—北山—内蒙古特提斯洋北支缝合带。早三叠世末期,由冈瓦纳大陆北缘裂解出来的西藏和缅泰陆片向北漂移,与华夏大陆西南边缘碰撞,形成昆仑—三江古特提斯洋南支缝合带。至此,华夏大陆成为劳亚大陆东南边缘一部分。
Abstract:
The Late Carboniferous-Permian Cathaysia floras are distributed mainly in East Asia, specifically in the North China, South China, Tarim and Indo-Chlna blocks. Based on the suturing time of these blocks and the Late Carboniferous-Permian sfiratigraphic and paleontologic characteristics there. the authors believe that these blocks had converged into one large continental block before the Carboniferous and call it Cathaysia as it is characterized by the development of Cathaysia floras. This land was located in the Paleo-Tethys Ocean between Angara and Gondwana, and Paleo-Tethys separated it into the northern and southern branches. In the Late Permian, Cathaysia drifted and collided with Angara finally at the end of the Permian, forming the Tianshan-Beishan-Inner Mongolia suture zone of the north branch of Paleo-Tethys. At the end of the Early Triassic, the Tibet and Sibumasu blocks separated from the north margin of Gondwana moved northward and collided with the southwest margin of Cathaysia, forming the Kunlun-Sanjiang （Three-Rivers）suture zone. Thus Cathaysia became a part of Laurasia.
百度学术
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