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Tectonic Evolution of the Junggar Foreland basin in the Late Carboniferous-Permian

Acta Geologica Sinica(English Edition) 2001年第4期75卷 398-408页

作者： chen shuping, zhang yiwei, {2. liangjie and bai guoping basin and reservoir Research centre, university of petroleum, changping, beijing 102.49 basin and reservoir Research {2. University of Petroleum Changping Beijing 102249 [?]2.0} Born in 1965 earned his B. Engr. from the university of petroleum in 1985 and M.Sc. from China university of Geosciences ({2.) in 1988. Now he is a Ph.D student in the basin and reservoir Research centre University of Petroleum Beijing. His research interest lies in tectonic analysis of basins.

A comprehensive study has been carried out to subdivide and correlate the Upper Carboniferous and Permian sedimentary successions in the Junggar basin based on outcrops and drilling and geophysical data. The study results, combined with geological analyses of the basin's periphery and the basement, as well as studies of the sedimentary rocks within the basin, the unconformities, tectonic geometry, kinematics and geodynamics, lead to the conclusion that the Junggar basin was characterized by the development of foreland basin systems during the Late Carboniferous and Permian. During that period, three foreland basin systems were developed: (1) the northwest foreland basin system, which trended nearly north-south from Mahu to the Chepaizi Palaeo-mountain during its early stage of development and thus it was also referred to as the west foreland basin system; (2. the Karamaili foreland basin system in the east and (3) the Northern Tianshan foreland basin system in the south. These systems are different in size, development stage and time of formation. The first two are developed earlier than the third, but they are smaller in size. All the structures in the Junggar basin have resulted from the integration and superposition of structural elements in the above three systems. In general, the development of the Junggar basin can be divided into four stages. Stage I was marked by the creation and evolution of the marginal western foreland and the peripheral Karamaili foreland basin systems during the Late Carboniferous-early Early Permian (C3P1ja). Stage II was characterized by the development of complicated foreland basin systems during the middle-late Early Permian (P1jb-P1f) when the three foreland basin systems took their shapes. Stage III was the integration stage of peripheral foreland basin systems during the Middle Permian (P2. in which steady and slow tectonic subsidence prevailed. Stage IV coincided with the shrinking of foreland basin development during the Late P

关键词： Junggar basin foreland basin system tectonic evolution

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Tectonic Evolution of the Junggar Foreland basin in the Late Carboniferous-Permian

Tectonic Evolution of the Junggar Foreland Basin in the Late...

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作者： chen shuping zhang yiwei {2. liangjie bai guoping (basin and reservoir Research centre university of petroleum,changping beijing 102.49)

＜正＞1 Introduction Since the concept of the "foreland basin" was introduced into geosciences by Dickinson in 1974 and giant oil and gas fields were found in the Rocky Mountains foreland basin,studies of foreland bas...

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