祁连造山带地球物理场特征和区域控矿
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摘要
本文利用1:100万区域重力、构造航磁、大地电磁测深和地震测深等地球物理资料,研究了祁连造山带区域构造、深部构造和区域控矿作用;祁连山造山带与周边具有不同地球物理场特征是划分构造单元的依据,在内部基底断裂构造具有南北分带,东西分块的特征。深部构造处在地壳厚度变异带边缘。并要考虑构造演化对成矿控制的阶段性。
On the basis of geophysical data of scale 1∶1000 000 including regional gravity, airborne magnetic survey of structures, magnetotelluric sounding, seismic sounding, the regional structure, deep structures, and regional metallogeny of Qianlian Orogenic Belt are studied. It is supposed that the deferent geophysical field characteristics of Qilian Orogen Belt from the surrounding area should be the evidences to classify tectonic element, internal structures of basement is characterized by zoning from south to north and several massif from east to west, the deep fractures is in the edge of crustal variation belt, the ore-forming were controlled by the stages of structural evolution.
On the basis of geophysical data of scale 1∶1000 000 including regional gravity, airborne magnetic survey of structures, magnetotelluric sounding, seismic sounding, the regional structure, deep structures, and regional metallogeny of Qianlian Orogenic Belt are studied. It is supposed that the deferent geophysical field characteristics of Qilian Orogen Belt from the surrounding area should be the evidences to classify tectonic element, internal structures of basement is characterized by zoning from south to north and several massif from east to west, the deep fractures is in the edge of crustal variation belt, the ore-forming were controlled by the stages of structural evolution.
引文
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[2]向鼎樸．祁连山地质构造特征［Ｊ］.地质科学,1987,4.
[3]向光中,吕德徽.青藏块体内北东向构造及其地震活动性[J].西北地震学报,1987,1.
[4]李占奎.航磁反映祁连山褶皱带的构造特征和基底性质[J].甘肃地质,1989,10.
[5]孟令顺,等.青藏高原东北缘重力场研究[J].物探与化探,1989,3.
[6]李清河,等.天水地震区人工地震测深资料解释与研究专集[J].西北地震学报,1991(增刊).
[7]中国地质科学院岩石圈研究中心.格尔木—额济纳旗地学断面多学科综合调查研究[J].地球物理学报,1995(增刊).
[8]左国朝,等.北祁连早古生代大地构造演化[J].地质科学,.1987(1).
[9]赵生贵.祁连造山带特征及其构造演化[J].甘肃地质学报,1996,1.
[10]冯益民,何世平.祁连山大地构造与造山作用[M].北京:地质出版社,1996.
[11]夏林圻,夏祖春,等.祁连山及邻区火山作用与成矿[M].北京:地质出版社,1998,3.
[12]毛景文,等.北祁连山西段铜金铁钨多金属矿床成矿系列和找矿评价[M].北京:地质出版社,2003,1.
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