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| Late Quaternary sinistral slip rate along the Altyn Tagh fault and its structural transformation model | |
| 作者姓名： | P. Tapponnier J. Van Der Woerd F. J. Ryerson A.S. Meriaux |
| 作者单位： | Laboratoire de Tectonique，Institut de Physique du Globe de Paris France，Laboratoire de Tectonique，Institut de Physique du Globe de Paris France，IGPP，Lawrence Livermore Laboratory Livermore，CA 94550，USA，Laboratoire de Tectonique，Institut de Physique du Globe de Paris France |
| 摘 要： | The Altyn Tagh Fault (ATF) is a major boundaryfault on the northern margin of the Qinghai-TibetanPlateau and is also the longest sinistral strike-slip faultat a lithospheric scale in the Eurasian Plate. Its exis-tence has directly affected regional features of neotec-tonics, topography, geomorphology, Quaternary geol-ogy, recent crustal deformation, seismicity, climatechange and ecological environment for fauna and florain China1—6]. The sinistral slip on the ATF and activethrusting-fo… |
| 收稿时间： | 14 October 2002 |
Late Quaternary sinistral slip rate along the Altyn Tagh fault and its structural transformation model |
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| P. Tapponnier,J. Van Der Woerd,F. J. Ryerson,A.S. Meriaux.Late Quaternary sinistral slip rate along the Altyn Tagh fault and its structural transformation model[J].Science in China(Earth Sciences),2005,48(3):384-397. | |
| Authors: | Xu Xiwei PTapponnier JVan Der Woerd FJRyerson WANG Feng Zheng Rongzhang Chen Wenbin MA Wentao YU Guihua Chen Guihua ASMeriaux |
| Institution: | 1. Institute of Geology, China Earthquake Administration, Beijing 100029, China 2. Laboratoire de Tectonique, Institut de Physique du Globe de Paris, France 3. IGPP, Lawrence Livermore Laboratory, Livermore, CA 94550, USA |
| Abstract: | Based on technical processing of high-resolution SPOT images and aerophotos, detailed mapping of offset landforms in combination with field examination and displacement measurement, and dating of offset geomorphic surfaces by using carbon fourteen (14C), cosmogenic nuclides (10Be+26Al) and thermoluminescence (TL) methods, the Holocene sinistral slip rates on different segments of the Altyn Tagh Fault (ATF) are obtained. The slip rates reach 17.5±2 mm/a on the central and western segments west of Aksay Town, 11±3.5 mm/a on the Subei-Shibaocheng segment, 4.8±1.0 mm/a on the Sulehe segment and only 2.2±0.2 mm/a on the Kuantanshan segment, an easternmost segment of the ATF. The sudden change points for loss of sinistral slip rates are located at the Subei, Shibaocheng and Shulehe triple junctions where NW-trending active thrust faults splay from the ATF and propagate southeastward. Slip vector analyses indicate that the loss of the sinistral slip rates from west to east across a triple junction has structurally transformed into local crustal shortening perpendicular to the active thrust faults and strong uplifting of the thrust sheets to form the NW-trending Danghe Nanshan, Daxueshan and Qilianshan Ranges. Therefore, the eastward extrusion of the northern Qing-hai-ibetan Plateau is limited and this is in accord with “the imbricated thrusting transforma-tion-limited extrusion model” |
| Keywords: | Altyn Tagh Fault sinistral strike-slip rate structural transformation extrusion tectonics |
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