Establishment of Tielimuke Fm. and Its Restriction on the Orogenic Period in Dakendaban, Western Tianshan Mountains

详细信息   

• 责任者：Zhang Zhaoqi (Shanxi Institute of Geological Survey ; Taiyuan 030001 ; China) ; Hao Jinhua
• 刊名：Geological Survey and Research
• 出版年：2008
• 卷期：31(2)
• 关键词：晚二叠世 ; Upper Permian ; 天山 ; Tianshan Mountains
• 页码：p.81-88
• 图表：5 illus., 12 refs.
• 分类号：1200
• issnNo：ISSN1672-4135
• isbnNo：CN12-1353/P

摘要

A set of continental molasse is located in Dakendaban, western Tianshan area with thickness of 2 800 m. It is angular disconcordance on the Carboniferous System Keguqinshan Fm. containing coal. Its main rocks are conglomerate and coarse sandstone with little thick sandstone and siltstone. And there are few fossils in it, which means the time of the rock formation is difficult to confirm. The Geological Survey Team of Xinjiang Geological Bureau suggests it is belongs to the upper and lower subformation of Permian System in 1∶200 000 scale Xiaobulusi sheet mapping in 1972. The authors found a layer of limestone during the geological mapping in 2004, and named it Tielimuke Fm. There are some mussels and other fossils in it. And they are identified to live in the fresh water of Permian Period.