阿尔金山东段重磁场特征及其地质意义  

GRAVITY AND MAGNETIC FIELD OF EASTERN ARKIN SECTION AND ITS GEOLOGICAL SIGNIFICANCE

作　　者：赵波波[1] 卜永宁 ZHAO Bo-bo;BO Yong-ning(Geological Survey of Gansu Province,Lanzhou 730000,China)

机构地区：[1]甘肃省地质调查院,甘肃兰州730000

出　　处：《甘肃地质》2019年第3期41-47,共7页Gansu Geology

基　　金：中国地质调查局,新疆1∶25万巴什库尔干、石棉矿、阿克塞县幅区域中力调查(项目编号1212011087031)。

摘　　要：重力异常是地下不同深度的各种密度体在重力场上的综合反映;航磁异常根据其背景和异常区带特征,直接或间接反映区域地质、构造、岩浆岩、矿产的分布,本文通过对阿尔金山东段1∶25万区域重磁资料重磁场进行分析研究,把研究区划分为7个不同重力场和构造单元,根据重力场的变化,准确的划分出各地质单元界线及覆盖区基底的隆起与凹陷,划分出3个航磁异常区,根据磁异常分布情况,推断磁异常与岩体的关系,为进一步地质及找矿工作提供地球物理参考。Gravity anomaly is the comprehensive reflection of various densities in different depths of underground gravity field;Aeromagnetic anomaly directly or indirectly reflects the distribution of regional geology,structure,magmatic rocks and minerals according to its background and characteristics of anomalous zones.Through the analysis and study of the gravity and magnetic fields of 1∶250,000 regional gravity and magnetic data in the eastern part of Altun Mountains,the study area is divided into seven different gravity fields and structures.Unit,according to the variation of gravity field,it accurately divides the boundary of geological units and the uplift and depression of the basement of the covered area,divides three aeromagnetic anomaly areas,infers the relationship between magnetic anomaly and rock mass according to the distribution of magnetic anomaly,and provides geophysical reference for further geological and ore prospecting work.

关 键 词：阿尔金山东段 分区 重磁场 地质意义 

分 类 号：P312.1[天文地球—固体地球物理学]