| SEDIMENTARY PROCESS OF THE CENOZOIC BASIN AND ITS RESPONSE TO THE SLIP-HISTORY OF THE ALTYN TAGH FAULT, NW CHINA |
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| 作者姓名： | Chen Zhengle Zhang Yueqiao Chen Xuanhua Wang Xiaofeng Z.Washburn J.Arrowsmith [WT ”BX] |
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| 作者单位： | 1 The Institute of Geomechanics，Chinese Academy of Geological Sciences，Beijing 100081，China;2.Department of Geology，Arizona State Unive |
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| 基金项目： | theprogramsof ( 1)theYoungGeologistsFoundationoftheMGMR (No .Qn979812 )，( 2 )theNational
(No .G19980 4 0 80 0 )，and ( 3)the |
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| 摘 要： | SEDIMENTARY PROCESS OF THE CENOZOIC BASIN AND ITS RESPONSE TO THE SLIP-HISTORY OF THE ALTYN TAGH FAULT, NW CHINAtheprogramsof ( 1)theYoungGeologistsFoundationoftheMGMR (No .Qn979812 ) ;;( 2 )theNational
(No .G19980 4 0 80 0 ) ;;and ( 3)the
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SEDIMENTARY PROCESS OF THE CENOZOIC BASIN AND ITS RESPONSE TO THE SLIP-HISTORY OF THE ALTYN TAGH FAULT, NW CHINA |
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| CHEN Zhengle,et al.SEDIMENTARY PROCESS OF THE CENOZOIC BASIN AND ITS RESPONSE TO THE SLIP-HISTORY OF THE ALTYN TAGH FAULT, NW CHINA[J].Earth Science Frontiers,2000(Z1). |
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| Authors: | CHEN Zhengle |
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| Abstract: | The NEE\|striking Altyn Tagh Fault (ATF) has been well known as one major point to know the growth history of the Tibetan plateau. Lots of investigations done since 1970's were mostly focus on active features, particularly on determining slip, slip rate and their distribution along the fault. However, Cenozoic slip\|history of this fault remains poorly understood, and the age of initiation and total offset are controversial. Several Cenozoic sedimentary basins develop in Suo'erkulinan to Mangya regions (Fig.1). Their sedimentary processes are closely related with the ATF. The studies of the Neogene sedimentary sequences and the reconstruction of the paleo\|geography are essential to establish the displacement history of the fault during Late Cenozoic.Located at the southern side of the ATF, the Suo'erkulinan basin consists of more than 600\|meter\|thick Pliocene Shizigou Formation below and about 120\|meter\|thick Early to Middle Pleistocene Qigequan Formation above according to the 1∶200000 geological map by Xinjiang Province. An obvious erosional surface can be seen on the top of the lower sequence. Sediments in the Shizigou Formation are characterized by 400\|meter\|thick yellow to red cobble\|sized conglomerates in the bottom, up\|grading to sandstones and grey\|green mudstones. This indicated that the sedimentary facies changed from alluvial fan to fluvial fan and sediments became more and more mature. The upper sequence, the Qigequan Formation, corresponds to an alluvial facies series composed of yellow to white cobble\|sized conglomerates intercalated with lenticular sandstones. Paleo\|current indicators showed that the Shizhigou conglomeratic series were sourced from northwest. Well\|developed syn\|sedimentary faults, normal faults mostly inherited from syn\|sedimentary faults, and some striation lineations on the surface indicated transtensional tectonic environment of the strike\|slip faulting. |
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| Keywords: | Altyn Tagh fault Cenozoic basins sedimentary process slip\| history reconstruction of the paleo\|geography |
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