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Major thrust sheet in the Daqing Shan Mountains Inner Mongolia, China 总被引：13，自引：0，他引：13
Small thrust faults in the Daqing Shan that were previously mapped as separate structures belong to a single Mesozoic thrust,
herein named the Daqing Shan thrust. It extends more than 155 km along the northern margin of the Daqing Shan, obliquely cutting
the Daqing Shan along the western flank of the Jinluandian peak to the southeast and taking its way to Chayouzhongqi to the
east. Kinematic markers indicate tectonic transport of the thrust sheet to the NNW. Minimum displacement, based on the observable
outcrops, is 22 km, and the inferred thrusting distance may be larger than 35 km. The thrust sheet covers the whole eastern
area of the Daqing Shan. The thrust truncates the E-W trending, somewhat older South-directed Panyanshan thrust and, therefore,
the two faults are not as a result of counter thrusting. Such major intraplate tectonic deformation that occurred in the Inner
Mongolia Axis or the Yin Shan latitudinal tectonic belt during late Jurassic time calls for deep thought on its tectonic significance
in dynamics. It is most likely that the Daqing Shan thrust represents major intraplate shortening during Jurassic-Cretaceous
closure of the Mongolo-Okhotsk ocean about 1000 krn away to the north.
Project supported by the National Natural Science Foundation of Chlna (Grant No. 49070135) and by the Natlonal Science Foundation
of the Unlted States (Grant No.EAR-9627909). 相似文献
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燕山带中生代主要构造事件与板块构造背景问题 总被引：103，自引：9，他引：94
对冀北、辽西火成岩体和火山岩的定年与野外构造的研究揭示,燕山地区主要缩短变形期为：①前中侏罗期（１８０Ｍａ）;②晚侏罗期（１６１～１４８Ｍａ）;③早白垩期（１４３～１２７Ｍａ→１１７Ｍａ）。前中侏罗期为ＳＮ向缩短可能与蒙古弧－华北板块沿索伦缝合带拼合有关。晚侏罗世－早白垩世的缩短变形可能是西伯利亚与蒙古－华北拼合板块沿其北１０００～１８００ｋｍ外,蒙古－鄂霍茨克缝合带碰撞的板内响应。我国东部ＮＮＥ 相似文献
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