摘要
对东特提斯地区二叠—三叠纪古气候特征及其演化的系统分析表明，二叠纪—晚三叠世期间东特提斯地区分带型气候特征仍然较为清楚．二叠纪早期非暖水沉积在印度板块上的时空分布表明，现今印度板块东南边缘当时应贴近南极洲而非澳大利亚西北部．早二叠世早期非暖水沉积的北界在滇西位于昌宁－孟连带之西；在青藏高原，可能位于班公湖－丁青带．之后随着联合古大陆的整体北移，亲冈瓦纳地块群经历了由南温带到热带的古气候演化，欧亚大陆南部经历了由热带到北温带的古气候演化．各地块二叠—三叠纪期间古气候特征的演化为其古地理位置的确定提供了重要依据．二叠纪栖霞期古地理再造表明特提斯洋具多岛洋特点，二叠纪早期昌宁－孟连洋向北延入班公湖－怒江带，向南延入清迈带，大体占据南部亚热带，宽约１０°古纬距．
Integration of the Permian-Triassic paleoclimates in individual blocks in the eastern Tethys indicates that zonal circulation dominated the period of Permian and Late Triassic. The retreat pattern of Early Permian non_warm water deposits on the Indian plate favors the solution that the Southeast India should have been close to the Antarctica. The non_warm water deposits of Early Permian are limited to the west of the Changning_Menglian belt in the western Yunnan and to the south of the Bangongco_Dingqing belt in Tibet. The Chihsian palinspastic reconstruction shows that the Changning_Menglian ocean covers the southern arid subtropic zone with width about 10° paleolatitude. This ocean may have extended northwestward to the Bangongco_Nujiang belt and southward to Chiang Mai belt.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1999年第1期13-20,共8页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金
关键词
二叠-三叠纪
东特提斯
古气候
古地理再造
Permian-Triassic, eastern Tethys, paleoclimate, paleogeographic reconstruction.
