利用重、磁资料研究五台--恒山地区构造格局  

Tectonic framework of Wutaishan-Hengshan region interpreted from gravity and magnetic data

作　　者：吴凌根 王万银[1] 李建国 周新鹏 冯旭亮[1] 赵楠 

机构地区：[1]长安大学重磁方法技术研究所,长安大学地质工程与测绘学院,长安大学西部矿产资源与地质工程教育部重点实验室,西安710054 [2]山西省地球物理化学勘察院,运城044004

出　　处：《地球物理学进展》2015年第2期531-539,共9页Progress in Geophysics

基　　金：中央高校基本科研业务费专项资金(2014G3262010);长安大学基础研究支持计划专项基金;山西省五台-恒山地区区域资料二次处理与成矿预测研究(晋地设发[2013]4号)联合资助

摘　　要：五台恒山地区是我国重要的银、锰、金及多金属成矿区.区内矿产与中生代岩体分布具有密切关系.而中生代岩体主要受断裂构造控制.因此,利用重、磁资料研究五台恒山地区的断裂构造、岩体分布及构造单元,为进一步划分成矿远景区提供地球物理依据.利用归一化总水平导数垂向导数(NVDR_THDR)技术推断研究区断裂分布,共划分断裂23条.其中一级断裂6条.二级断裂17条;利用剩余异常研究岩体的分布特征,共推断隐伏岩体34处。主要分布在五台山、恒山及灵丘一带:根据断裂和岩体的分布特征及重、磁异常场的分区特征,结合相关的地质资料,将研究区划分为11个构造区,主体走向为NE和NNE向.研究表明.NE向断裂对构造单元的展布和岩体分布起主要控制作用,并且岩体主要分布于五台山中部NE、NW及近EW向断裂的交汇处.同时位于不同构造单元的分界处.Wutaishan-Hengshan region is an important gold and silver polymetal ore district in China, the mesozoic magma is closely related to ore deposits, and the location of mesozoic magma body is controlled by the fault structure mainly. The paper research the fault structure, magma body distribution and Tectonic framework of Wutaishan-Hengshan region by using gravity and magnetic data, the results provide basis for mineral exploratioru The authors deduced twenty-three fault with edge recognition technology based on the normalized vertical derivative of the total horizontal derivative （NVDR_ THDR） for potential data , which contains six first-order faults and seventeen second order faults. The authors researched the distribution characteristic of magmatic rock by residual gravity and magnetic anomalies, and deduced thirty-four concealed magmatite which is located in Wutaishan , Hengshan and Lingqiu region mainly; on the basis of fault and the feature of gravity and magnetic anomaly, combined with geological data, Wutaishan-Hengshan region is divdied into eleven tectonic units, most of them stroke in NE, NNE. Research has shown that NE trending faults control the trending of Tectonic units and magma body distribution , and magmatite is located in intersections of NE, NW and EW trending faults and border of different tectonic units, and magmatite distribution is closely related to Tectonic units.

关 键 词：NVDR_THDR技术 断裂 岩体分布 构造格局 

分 类 号：P312[天文地球—固体地球物理学] P318[天文地球—地球物理学]