Li B.L.,Petrochina |
Li B.L.,State Key Laboratory of EOR and Petroleum Resource |
Lei Y.L.,Petrochina |
Lei Y.L.,State Key Laboratory of EOR and Petroleum Resource |
And 5 more authors.
Acta Petrologica Sinica | Year: 2011
The western Sichuan basin foreland thrust and fold belt locate between the Tibetan Plateau and Upper Yangtze plate, which is the main part of the eastern segment of Circum-Tibelan Plateau Basin and Range System iormed during the Himalayan tectonic movement. There are different neo-tectonic deformation features in the different areas. The long geologic profile cross the whole foreland thrust and fold bell in the south segment ol western Sichuan basin, north segment ol western Sichuan basin and west segment ol northern Sichuan basin, are compiled to study the neo-tectonic features and distribution. After comparing their defonuation width of foreland thrust and fold bell, structural shortening amount, lilted mountain altitude, basin subsidence and the space relation between old structure and neo-structure, authors consider that, (1) thrust and fold deformation propagate from old orogen to eratonic basin; (2) the spatial location from Tibetan Plateau also lead to the neo-tectonic deformation strength, deformation scope and couple grade ol basin and range become weak from south to north in the western Sichuan basin. The neo-tectonic deformation impact the distribution of nature resources and living environment of human being. For example, its the late accumulation secondary nature gas reservoir in the south segment of western Sichuan basin because of the strong neo-tectonic defonuation, but the old accumulation primary nature gas reservoir in the north segment of western Sichuan basin and west segment of northern Sichuan basin because of the weak neo-tectonic deformation.