Discovery and Geological Significance of Unconformity Surface between Upper Triassic Ma’antang Formation and Xiaotangzi Formation in Hanwang of Mianzhu in Northwest Sichuan, China
详细信息
- 责任者：Zhang Biao (State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Wang Zhongjiao
- 刊名：Journal of Chengdu University of Technology
- 出版年：2013
- 卷期：40(1)
- 关键词：不整合 ; unconformities ; 四川 ; Sichuan Province
- 页码：p.80-88
- 图表：illus., 42 refs.
- 分类号：0300
- issnNo：ISSN1671-9727
- isbnNo：CN51-1634/N
摘要
Based on the field geological investigation,a parallel unconformity surface between the Upper Triassic Ma’antang Formation and Xiaotangzi Formation is found in the Hanwang section of Mianzhu in Northwest Sichuan Province. The unconformity surface is related to the Late Triassic tectonic activities and the global and regional sea level changes.It indicates that the Longmen Mountains partly uplifted from the Late Carnian to Early Norian.From this sedimentary section,it is concluded that the paleoclimate changed from arid to humid,then to arid,from Late Carnian to Early Norian and that this process is related to global climate changes under the background of megamonsoon system.
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