Tectonic setting of Upper Teritary in Anyang deduced from chemical and mineral parameters
Shang Yanjun1,2, Jiang Yi1,3, Gao Qiang1,3, Li Yanyan1
1. Key Laboratory of Shale Gas and Geoengineering，Institute of Geology and Geophysics，CAS，Beijing 100029； 2. Xinjiang Institute of Engineering，rümqi 830023； 3. University of Chinese Academy of Sciences， Beijing 100049
Middle Route of South—to—North Water Diversion Project provides a big and ideal “geological trench” to reveal the Tertiary strata along the east piedmont of Taihang Mountain. The Neogene strata are made of the fluvial and lacustrine sediments， which are in low maturity and greatly influenced by regional tectonic activities. In this paper， the author applies Dickinson and geochemistry indicators to compare sedimentary petrology and geochemistry characteristics of Anyang main canal section with that of the Pakistani Kashmir N—J diversion tunnel. The results suggest that the Anyang main canal section belongs to passive continental margin and developed to active continental margin in Late Pliocene， while Pakistani Kashmir N—J diversion tunnel belongs to tectonic features of island arc and active continental margin. It is found that the Anyang main canal section and the Pakistani Kashmir N—J diversion tunnel， which developed under different Neogene tectonic activity settings， differ significantly in the rock components and chemical characteristics.