摘要
川西木绒锂矿区位于雅江穹窿群北东部、甲基卡稀有金属矿田西部外围,有良好的稀有金属成矿前景,但受限于高原地区地形切割深、第四系覆盖层厚,常规物化探方法 (土壤测量、大功率电法测量)找矿效果不佳。本文通过在雅江木绒锂矿区进行地电化学测量与AMT测量相配合的综合研究,探寻一套适合于深切割地区深部找矿的技术组合,为在该区域内寻找同类型矿床提供技术方法支撑。通过实验研究,地电化学测量结果显示在500 m以浅Li元素及伴生元素的组合异常对深部锂矿(化)体有良好的指示作用;AMT测量方法的电阻率曲线梯度带能够反映脉状矿化体、伟晶岩的产出部位及大致埋深;通过钻孔验证发现两者异常与矿(化)体位置耦合度非常高,证明该综合手段对深部找矿具有实际意义,可降低找矿风险;同时在矿区外围开展找矿预测,圈定两处找矿靶区,为下一步找矿工作指明方向。
The Murong lithium deposit in western Sichuan Province is located in the northeastern part of the Yajiang dome group and the western periphery of the Jiajika rare metal ore field.It is considered that this region possesses good metallogenic prospecting potentical for rare metals.However,due to the intense landform incision and thick Quaternary coverage in the plateau area,the conventional geophysical and geochemical exploration methods(soil and high-power electrical measurement)have poor prospecting effect.Based on the comprehensive study of the geo-electrochemical measurement and AMT measurement in the Murong lithium mining area of Yajiang,this paper discusses a set of new technical combinations suitable for deep prospecting,so as to provide a new technical method for prospecting the same type of deposits in this area.The results show the geoelectrochemical combination anomaly of Li and associated elements within 500 m has a good indication effect on deep lithium ore bodies.The gradient zone of the resistivity curves of the AMT measurement can reflect the occurrence position and approximate burial depth of veined mineralized bodies and pegmatite.Drilling verification suggests that the anomalies agree well with the location of ore bodies(mineralization),which indicates that the comprehensive method has practical significance for deep prospecting and can reduce prospecting risk.Prospecting prediction was carried out in the periphery of the mining area,and two prospecting target areas were delineated to point out the direction for the future prospecting work.
作者
岳大斌
刘攀峰
廖兴健
陈加中
李杰伟
杨青松
杨秀娟
YUE Dabin;LIU Panfeng;LIAO Xingjian;CHEN Jiazhong;LI Jiewei;YANG Qingsong;YANG Xiujuan(The 3rd Geological Brigade of Sichuan,Chengdu,Sichuan 611730;College of Earth Sciences,Guilin University of Technology,Guilin,Guangxi 541006)
出处
《地质与勘探》
CAS
CSCD
北大核心
2023年第4期760-773,共14页
Geology and Exploration
基金
国家自然科学基金项目(编号:42203067)
广西自然科学基金项目(编号:2022GXNSFBA035548、2021JJA150037)
广西中青年能力提升项目(编号:2022KY0261)
四川省地质矿产勘查开发局科技项目(编号:SCDZ-KJXM202306)联合资助。
关键词
地电化学
AMT测量
深部找矿
花岗伟晶岩
木绒锂矿床
雅江
川西
geo-electrochemistry
AMT measurement
deep prospecting
granitic pegmatite
Murong lithium deposit
Yajiang
western Sichuan Province
