拉萨地体南部多金属矿集区构造样式——来自深地震反射剖面的证据  

A study of tectonic style of the polymetallic ore concentration area in Southern Lhasa terrane——Evidence from deep seismic reflection profile

作　　者：徐泰然 卢占武[2] 张雪梅[1] 李文辉[2] 贾君莲 XU Tairan;LU Zhanwu;ZHANG Xuemei;LI Wenhui;JIA Junlian(China Earthquake Networks Center,Beijing 100045,China;Key Laboratory of Deep Dynamics,Ministry of Natural Resources/Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;Eastern Geophysical Exploration Co.,Ltd.,Research Center,China National Petroleum Corporation,Zhuozhou 072750,Hebei,China)

机构地区：[1]中国地震台网中心,北京100045 [2]自然资源部深地动力学重点实验室/中国地质科学院地质研究所,北京100037 [3]中国石油集团东方地球物理勘探有限责任公司研究院处理中心,河北涿州072750

出　　处：《地质通报》2019年第10期1595-1602,共8页Geological Bulletin of China

基　　金：国家重点研发计划项目《青藏高原主碰撞带岩石圈精细结构与深部过程》(编号:2016YFC0600301);国家自然科学基金项目《喜马拉雅造山带与大地震发生的深部介质和构造环境》(批准号:41774069)、《青藏高原中部、西部深地震反射“亮点”构造研究》(批准号:41574091);中国地质调查局项目《冈底斯构造带关键地区深部地质调查》(编号:DD20160022-05);自然资源部深地动力学重点实验室自主研究课题《喜马拉雅、三江成矿带混合源地震探测与浅-深结构研究》(编号:J1901-3)

摘　　要：位于冈底斯成矿带中段的雄村、娘热地区,因近年来不断发现铁、铜等金属矿床,而逐渐被关注。但是由于缺少地球物理资料,该地区地壳精细结构未能取得清楚的认识。针对横过雄村-娘热矿集区130km深地震反射剖面及25km矿集区内部加密反射剖面的数据,进行了层析静校正、能量补偿、去噪、速度分析等数据处理,获得了雄村-娘热矿集区地壳结构的反射图像。结合本区地质资料,对矿集区深部结构进行了解释和推断,揭示了上地壳多条断裂及各类地质现象,认定断裂与岩浆流动上升方向有关,研究结果对矿集区成矿背景的研究具有一定价值。The Niangre and Xiongcun areas in the middle section of the Gangdise metallogenic belt have gradually attracted attention due to the continuous discovery of metal deposits such as iron and copper deposits in recent years.However,due to the lack of sufficient geophysical data,the fine structure of the crust in this area has not been clearly understood,which restricts the study of the ore-forming background of this area.Employing the data of 130km deep seismic reflection profile of the Xiongcun-Niangre ore concentration area and encrypted reflection profile inside 25km of the ore concentration area,the authors carried out data processing of tomographic static correction,denoising,energy compensation and velocity analysis,and obtained the reflection image crustal structure of the Xiongcun-Niangre ore concentration area.Based on the geological data of this area,the authors explained and inferred the deep structure of the ore concentration area,revealed multiple faults in the upper crust and various geological phenomena.It is determined that the fault is related to the direction of the magma flow.The results have certain value for the study of the ore-forming background of the ore concentration area.

关 键 词：深地震反射 冈底斯成矿带 地壳结构 深部背景 多金属矿集区 

分 类 号：P618.2[天文地球—矿床学] P31[天文地球—地质学]