从玉门榆树沟北山基性超基性岩地质—地球物理特征探讨岩体含矿性  

ORE-BEARING POTENTIALITY AND GEOPHYSICAL CHARACTERISTICS OF BEISHAN BASIC-ULTRABASIC ROCK IN YUSHUGOU, YUMEN

作　　者：党杰 金洪文 李百祥 华天月 DANG-Jie JIN Hong-wen LI Bai-xiang HUA Tian-yue(The Second Institute of Geology and Minerals Exploration, Gansu Provincial Bureau of Geology and Minerals Exploration and Development, Lanzhou 730020, Chin)

机构地区：[1]甘肃省地矿局第二地勘院,甘肃兰州730020

出　　处：《甘肃地质》2016年第3期70-75,81,共7页Gansu Geology

摘　　要：本文在甘肃省玉门市榆树沟北山基性、超基性岩地质、物探勘查的基础上,对勘查成果存在认识分歧进行探讨,并得到钻孔验证。主要包括榆树沟山及其附近地质构造环境,是大陆裂谷,还是蛇绿岩所在的洋壳海盆;基性、超基性岩成矿的专属性和系列性,是含铜镍矿及铂族(PGE)矿有关铁质超基性岩,还是含铬铁矿(化)超镁铁质蛇绿岩。高精度磁测和激电组合异常形成机制以及在岩体含矿性评价中的作用,激电异常高激化、中高阻是反映星点状、稀疏浸染状硫化物,还是基性、超基性岩中普遍存在的磁铁矿;CSAMT低阻带是超基性岩体底部岩浆熔离型铜、镍块状硫化矿反映,还是虚假异常"过渡区低谷"。On the basis of Yushugou beishan basic-ultrabasic rock geological and geophysical exploration in Yumen Gansu province, this article discusses the differences of the exploration results and gets the drilling verification. It mainly includes that Yushugou Mountain and nearby region geological tectonic environment is a continental rift or ophiolite existed oceanic basin; the basic-uhrabasic rock metallogenic specificity and series are about containing copper and nickel ore PGE irony ultrabasic rock, or having chromite uhramafic ophiolite. High precision magnetic survey and IP anomaly formation mechanism effect in the evaluation of rock mass contains that IP anomaly high intensify, middle-high resistance are reflected stars dotted, sparse disseminated sulfide, or ubiquitous magnetite in basic-ultrabasic rock; CSAMT low resistivity zone is reflected the bottom of the uhrabasic rock magma liquation type copper, nickel massive sulfide, or false anomaly ＂transition zone low＂.

关 键 词：构造环境控岩控矿性 基性超基性岩成矿专属性 激电、磁异常多解性 CSAMT异常虚假性 

分 类 号：P588.12[天文地球—岩石学] P612[天文地球—地质学]