摘要
滇西的三江断裂带被当作是冈瓦纳与欧亚大陆的碰撞带和特提斯大洋的消亡带。但是,由于华夏植物群与高分异度的特提斯(竹蜓)科动物群均跨越了上述断裂带,且本区未见完整的洋壳序列,表明其间没有大洋存在。两大板块的分界带实属过渡性质,证明滇西是联结南北大陆的一陆间海。其中的岛海格局大体与今日的南北美洲、亚洲东南与大洋洲之间的地理景观相似。滇西在石炭-二叠纪时古地理位置大致在25°～40°S之间。特提斯构造带局部可能具洋壳性质,早古生代发生,晚古生代发展,于中、新生代逐渐衰亡。
The Sanjian fault belt in western Yunnan Province is considered as a collision belt between the Gondwanaland and the Eurasialand and a subduction belt of Tethys Ocean .But ,both the Cathaysia flora and the Tethyan fauna were across those fault belts mentioned above , and there was no any complete oceanic crust sequence to be found yet , thus it was suggested no ocean existence between the two great land s . The boundary between the two substantially is transitional .It is evidenced that western Yunnan was an intracontinental sea to connect the south and the north continents . The framework of the islands ?seas among them is similar to the geographic landscape between the South and the North America , and between the South - east Asia and the Australia today . The palaeogeographic position of Permian -Carboniferous is located within 25°-40° S roughly. The structure belts of Tethys show some characters of the oceanic crust. They occurred in the Early Palaeozoic , developed in the Late Palaeozoic and gradually terminated in Mesozoic and Cenozoic .
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1990年第4期397-406,共10页
Earth Science-Journal of China University of Geosciences
关键词
古地理
石炭纪
二叠纪
构造
palaeogeography , Tethys , Carboniferous , Permian , western Yunnan Province.
