Kinematic History and Changes in the Tectonic Stress Regime during the Cenozoic along the Qinling and Southern Tanlu Fault Zones

查看全文 作　　者：ZHANG [1]Yueqiao;Pierre [2]Vergèly;Jacques-Louis [2]Mercier;WANG [3]Yongmin;ZHANG [3]Yong;HUANG [3]Dezhi

机构地区：[1]Institute of Geomechanics,Chinese Academy of Geology,Beijing 100081,China;[2]URA-CNRS:Géophysique et Géodynamique Interne,Universitéde Parie-Sud,Batment 509,F-91405,Orsay-Cedex,France;[3]Institute of Geology,Bureau of Geology and Mineral Resouces of Anhui Province,Hefei,China

出　　处：《Acta Geologica Sinica(English Edition)》索引1999年第73卷第3期,共11页

基　　金：supported by the programmes'Dynamique et Billan de la Terre','Imageric et Structure de la Terre'(Tectoscope)of In-stitut National des Sciences de l'Univers(INSU)and Centre National de la Recherche Scientifiquc(Paris,France). 摘　　要：Since the mid-late Eocene, North China has been subjected to extensional stress, resulting in the formation and development of basins. The dynamic origin of this crustal extension has long been an issue of debate. This paper presents the results of kinematic analyses of faults obtained from two seperated areas in North China. In the Weihe graben situated on the southernmost margin of the Ordos block, analyses of fault kinematics were coupled with an analysis of the basin’s subsidence history. Three successive extensional tectonic phases accompaning the basin’s formation and development have been distinguished. The Palaeogene extension was oriented in a WNW-ESE direction; the Neogene extension in a NE-SW direction and the Pliocene-Quaternary extension in a NW-SE direction. Such changes have also been recorded by fault kinematics along the southern Tanlu fault zone. This has been demonstrated by three successive sets of fault striations indicating normal dip slip resulting from NW-SE extension, then left- 关键词：FAULT kinematics TECTONIC stress regime QINLING and Tanlu FAULT ZONES

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Kinematic History and Changes in the Tectonic Stress Regime during the Cenozoic along the Qinling and Southern Tanlu Fault Zones

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