东天山库姆塔格沙垄地区企鹅山群的解体及岩石地层单位厘定

李永军; 杜志刚; 胡克亮; 李新光; 刘静; 张洪瑞

Volume 33 Issue 4

Jul. 2008

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Article Navigation > Earth Science > 2008 > 33(4): 458-464

LI Yong-jun, DU Zhi-gang, HU Ke-liang, LI Xin-guang, LIU Jing, ZHANG Hong-rui, 2008. On Disintegration of Qi'eshan Group and Its Definition of Lithostratigraphic Units from Kumutag Sand-Ridge Area in the Eastern Tianshan. Earth Science, 33(4): 458-464.

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On Disintegration of Qi'eshan Group and Its Definition of Lithostratigraphic Units from Kumutag Sand-Ridge Area in the Eastern Tianshan

1.
Earth Science & Resources College, Chang'an University, Xi'an 710054, China
2.
Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Chang' an University, Xi'an 710054, China
3.
No.9 Geological Party, BGMERD of Xinjiang, Urumqi 830000, China

Received Date: 2007-01-24
Publish Date: 2008-07-25

Abstract

Abstract

The debate of the definition of lithostratigraphic units in formation scale in eastern Tianshan was presented long before.During 1∶50000 regional geology and mineral survey, some conodonts fossils such as Streptognathodus suberectus, Idiognathoides sinuate etc.and coral fossils such as Pelalaxis intermedia, Lithostrotionella rarivesicula, Fomichevella kiaeri were discovered in the two limestones of the Qi'eshan Group from Kumutag sand-rigde.The age of conodont fossils within the stratum was determined as the Upper Carboniferous Luosu Stage-Dalaan Stage, and the age of coral fossils within the stratum was confirmed as the Dalaan Stage-Xiaodushan Stage.Therefore, they belong to Dikan'er Formation and Qishan Formation.The two volcanic rocks separated by two sedimentary rocks have some characteristics such as regular distribution in space, diagnostic rock association, distinguishable in field geolgy and comparable in study area.And their ages are Early Carboniferous and Late Carboniferous respectively.Therefore, the Qi'eshan Group can be further divided into four lithostratigraphic units according to formation scale from early to late, which are Xiaorequanzi Formation, Dikan'er Formation, Qi'eshan Formation and Qishan Formation.
- discovery of fossil,
- Carboniferous,
- disintegration of Qi'eshan Group,
- definition of lithostratigraphic units,
- Kumutag sand-ridge area,
- eastern Tianshan

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