CSAMT在胶东前垂柳矿区金矿资源调查评价中的应用  

Application of CSAMT in Gold Resource Investigation and Evaluation in Qianchuiliu Mining Area,Jiaodong

作　　者：张利峰 段留安 王志军 李子永 刘飞[1] 王小天 韩小梦 ZHANG Lifeng;DUAN Liuan;WANG Zhijun;LI Ziyong;LIU Fei;WANG Xiaotian;HAN Xiaomeng(Yantai Center of Coastal Zone Geological Survey,China Geological Survey,Ministry of Natural Resources Observation and Research Station of Land-Sea Interaction Field in the Yellow River Estuary,Yantai 264000,Shandong,China)

机构地区：[1]中国地质调查局烟台海岸带地质调查中心,自然资源部黄河入海口陆海交互作用野外科学观测研究站,山东烟台264000

出　　处：《黄金科学技术》2025年第1期44-54,共11页Gold Science and Technology

基　　金：国家重点研发计划项目“脉状金系统的综合找矿技术与增储示范”课题(编号:2022YFC2903605);中国地质调查局项目“山东牟平辽上金矿资源调查评价”(编号:DD20243129);烟台市高端人才引育“双百计划”联合资助。

摘　　要：胶东地区是我国著名的金矿产地,是巨型矿集区。胶莱盆地东北缘位于胶东东部,广泛发育有金多金属矿床。可控源音频大地电磁法(CSAMT)具有勘探深度大、分辨率高和抗干扰能力强等特点,因此被广泛应用在矿产勘查工作中。通过在胶莱盆地东北缘前垂柳金矿区开展可控源音频大地电磁法(CSAMT)测量工作,并结合矿区地质资料和岩石电阻率特征,查明了前垂柳矿区构造破碎带的厚度、走向以及花岗岩接触带的深部发育特征,CSAMT解译结果与钻探结果一致,取得了良好的效果,有效验证了前垂柳矿区“三层结构勘查模式”以及前垂柳一带存在“近EW向构造控矿模式”。可控源音频大地电磁法(CSAMT)可作为该区域金矿勘查的有效技术手段。In recent years,the northeastern margin of the Jiaolai Basin has emerged as a significant gold concentration zone within the Jiaodong region.This development follows the discovery of several gold deposits,such as Pengjiakuang,Liaoshang,and Xilaokou,prompting numerous geological prospecting units and scientific research institutions to intensify efforts towards achieving breakthroughs in deep-level prospecting.The Controlled Source Audio Magnetotelluric Method(CSAMT)has been prominently utilized due to its capacity to overcome the limitations of natural field source signals,offering substantial exploration depths,high resolution,and efficient observationsal capabilities.The study concurrently advances research in subsurface sounding and profiling,with recent extensive applications in mineral exploration recently.In this investigation,CSAMT was deployed in the Qianchuiliu mining area.By integrating geological data with the inversion of rock resistivity properties,we analyzed electrical characteristics and spatial features of structural alterations in the shallow subsurface at a depth of-1000 meters.This analysis builds upon previously identified deep-seated,concealed ore-controlling structural alteration electricity features.A comprehensive analysis of the metallogenic characteristics and prospecting principles associated with the electrical structure was conducted.The findings revealed a thick,near-east-west tectonic fracture zone in the mine’s deep section of the mine.The electrical structure of the geological formation predominantly displays a three-layer configuration characterized by highlow-high resistivity from shallow to deep levels.Additionally,the top interface of the Queshan rock body demonstrates a shallow-deep-shallow trend when observed from south to north.The deep,extensive thick lowresistance fracture zone and the shallow trap low-resistance electrical body exhibit considerable potential for exploration and should be prioritized primary targets in forthcoming drilling initiatives.Controlled Source

关 键 词：可控源音频大地电磁法(CSAMT) 构造破碎带 矿产勘查 前垂柳金矿 胶莱盆地东北缘 

分 类 号：P618.51[天文地球—矿床学]