边界识别技术在内蒙金巴山铜矿区断裂划分中的应用  

Application of boundary detection method in fault division of the copper mine in Jinbashan,inner Mongolia

作　　者：虎新军 李宁生 陈涛涛 安百州 陈晓晶 顾江 张媛 HU Xinjun;LI Ningsheng;CHEN Taotao;AN Baizhou;CHEN Xiaojing;GU Jiang;ZHANG Yuan(Ningxia Hui Autonomous Region of Geophysical and Geochemical Exploration Institute,Yinchuan 750001, China)

机构地区：[1]宁夏回族自治区地球物理地球化学勘查院,银川750001

出　　处：《物探化探计算技术》2020年第2期277-284,共8页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：宁夏回族自治区地球物理地球化学勘查院自筹资金项目(宁夏物勘院[2017]自筹资金001号);宁夏回族自治区重点研发计划重点项目(2018BFG02012)。

摘　　要：利用重磁资料边界识别技术划定地质构造为数据处理解释的重要方面之一,尤其是针对小规模断裂构造位置的准确划定,更是值得探讨的问题之一。这里分别将垂向二阶导数、水平总梯度模、水平方向导数与斜导数应用于分布规模、磁场强度不一的长方磁性体边界识别中。结果显示,与垂向二阶导数、水平总梯度模、水平方向导数三种传统边界识别方法相比较,斜导数对局部磁异常之间小规模断裂探测效果更为明显,识别断裂基本不受磁性体的规模、磁化强度的差异所影响。以斜导数为基础,综合应用4种边界识别方法,在地质工作程度比较低的内蒙金巴山某矿区共划定北西向、东西向和北东向断裂共42条,其中9条断裂已经被地质证实,包括区域性断裂1条。通过3条激电测深剖面,印证了边界识别技术划分断裂的可靠性。The use of the gravity and magnetic data boundary detection method to define geological structure is one of the important tool for data processing and interpretation,especially for small-scale fractures accurately delineate the location.It is one of the issues worth exploring.The authors applied the vertical second derivative,the total horizontal derivative and the horizontal direction derivative as well as the tilt angle,to detect the boundary of the rectangular magnetic body with different scales and magnetic.The results show that compared with the three traditional boundary detection methods,the tilt angle on detection of small-scale fractures between local magnetic anomalies is more obvious.Recognition of fractures has not affected by the difference in the scale and magnetization.Based on the tilt angle,nine boundary detection methods were applied comprehensively.In the mining area,a total of 42 fractures were identified in the northwest,east-west,and northeast.Three of these fractures have been geologically confirmed,including one large-scale fracture.The reliability of the boundary detection method to divide fractures is verified by three IP sounding profiles.

关 键 词：重磁勘探 内蒙金巴山 边界识别技术 斜导数 断裂划分 

分 类 号：P631.1[天文地球—地质矿产勘探]