【摘要】 内蒙古中部达茂旗查干呼绍地区槽台断裂的位置,多年来存在较大争议。一种观点依据物探资料认为该断裂位于白音敖包与满都拉之间;另一种观点认为该断裂在白音敖包南侧,且在呼吉尔图一带走向由北西转向北东,沿艾不盖河呈弧形展布。笔者依据在该区从事1∶5万区调工作多年所收集的地层、构造、侵入岩等大量证据,并结合航磁、重力等资料,认为上述两种观点都值得商榷。这两种观点认为查干呼绍地块属于华北地台,但资料表明艾不盖河东侧查干呼绍地块的地质特征与华北地台北缘有较大差异,而与白音敖包—满都拉苏木一带真正的地槽区无论在构造变形、地层分布、侵入岩特征等方面相同。因此,认为查干呼绍地块应属地槽的组成部分而不属于地台,槽台断裂的位置应在查干呼绍地块南侧,该断裂近东西向延伸,在区内出露长度超过200km。更多还原

【Abstract】 The position of rupture between the geosyncline and the North China platform have being obvious arguments in Chaganhushao area of middle part of Inner Mongolia. Some geologists thought that the rupture was located between Baiyin′aobao and Mandula countryside based on the data of geophysical prospecting,and others thought that it lay to the south of Baiyin′aobao with strike direction from NW to NE on turning at Huji’ertu.However both the opinions should be discussed again,because the Chaganhushao block that belongs actually to the geosyncline was assigned to the platform on their opinion.Based on stratigraphical,structural and intrusive rocks data from the 1:50000 regional geological survey and integrated with the aeromagnetic and gravity survey data,it is considered in the paper that the characteristics of Chaganhushao block are different from N.C.platform but similar to Baiyin’aobaoMandula geosyncline.The rupture between platform and geosyncline should be located at south of Chaganhushao block,trends towards nearly EW and it′s length exceeds 200 km in the area.更多还原