摘要
本文详细描述了丁家寨组冰成岩的岩石特征及冰川遗迹,划分了冰川类型及其沉积相,讨论了丁家寨组的地层时代,并与腾冲-梁河地区、西藏以及国外相同时代含冰成岩的地层作了对比。本区中晚石炭世的冰成岩系沉积并非弧立的,当时出现全球性大冰期。晚古生代的冰成岩在西藏珠峰地区及印度次大陆也很发育,当时都位于南半球并属于冈瓦纳大陆的一部分。地层的比较说明,本区在中晚石炭世与泰国西部、马来西亚西部和缅甸都应处于冈瓦纳大陆北缘大陆架部位。
The petrographic features of glacial rock and glacier remains and ages of the Dingjiazhai Formation are described and Jiscussed in detail, the glacial types and their sedimentary facies are classified in this paper. The authors also correlate it with the same age strata containing glacial rocs in the Tengchong-Lianghe region, Tibet and abroad. It was not an isolated event for the deposition of the glacial rock series of Mid-Late Carboniferous in this region due to the appearance of a world-wide big glacier period. The glacial rocks of the Upper Paleozoic were well-developed in Mount Qomolangiha area of Tibet and Indian subcontinenet, which situated in the southern hemisphere and belonged to part of the Gondwana. The correlation of strata indicates that this region together with the western Thailand, western Malaysia and Burma were all located in the shelf of nor-thern margin of the Gondwanal and during the Mid-Late Carboniferous. ‘、、’,
出处
《云南地质》
1992年第3期268-282,共15页
Yunnan Geology
