摘要
河东金矿位于胶西北望儿山断裂中段,其探矿深度已超过地表下800m,根据测区强干扰条件及2 000m深度探测要求,制定了针对深部矿体定位预测的地、物、化、遥多元异常信息找矿方案,其中化探方法采用的是构造地球化学法。遥感蚀变信息来源于美国7号陆地卫星ETM多光谱数据。物探技术选择了广域电磁测深法,并按120m×50m网度开展了9条测线的广域电磁测深法测量。在平面上主要依据遥感泥化蚀变异常和Au、As、Cu等元素的构造地球化学异常,在剖面上主要根据广域电磁测深法所获得的低电阻率异常信息,结合地质认识圈定出深部找矿靶位两处。经钻探工程验证,在300～1 300m深度范围发现了新的隐伏矿体。
Hedong gold deposit is located in the middle of Wangershan fault. The depth of prospecting in the deposit had exceeded 800 m. The ore exploration scheme based on multiple abnormal information was established according to the intense disturbance condition and the demand of exploring depth of 2000 m. The method of tectonic geochemistry was chosen as the geochemical method. The remote sensing alteration information was from ETM multispectral data of I.andsat 7 of USA. Wide field electromagnetic sounding methods was chosen as the geophysical prospecting method and 9 survey lines were completed according to 120 m×50 m survey grid. Two prospecting targets were delineated according to the abnormity of remote sensing pelitization alteration and the tectonic geochemistry of Au, As and Cu in the plane and the low resistivity abnormity from wide field electromagnetic sounding methods in the section. New gold orebodies were discovered at the depth from 300 m to 1300 m by drillings.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2014年第5期221-226,共6页
Earth Science Frontiers
基金
国家科技支撑计划项目(2006BAB01B07)
国家重点基础研究发展计划"973"项目前期研究专项课题(2007CB416608)
关键词
广域电磁测深法
构造地球化学法
遥感蚀变信息
深部矿体定位预测
河东金矿
wide field electromagnetic sounding methods
tectonic geochemistry
remote sensing alterationinformation
oriental prognosis of deep orebodies
Hedong gold deposit
