摘要
针对浅覆盖区隐伏萤石矿勘查难题,本研究创新性构建“地-物-化”协同勘查体系,集成高精度磁测、激发极化与土壤化探技术,揭示隐伏矿体地球物理-地球化学响应特征。通过高精度磁测圈定负磁异常区,激电中梯识别中阻中极化带,结合氟钙异常追踪,在方城县第四系覆盖区精准圈定5处靶区。验证钻孔揭露矿体埋深36.5~52.3 m,厚度2.6~5.2 m,证实物化探异常与隐伏矿体的空间耦合规律。本次研究揭示了构造蚀变岩型萤石矿地球物理及地球化学特征,提出综合物探方法与化探互补技术可有效抑制多解性。该成果为浅覆盖区隐伏萤石矿勘查提供了技术方案,对同类型矿床勘查具有重要示范意义。
In response to the exploration difficulties of hidden fluorite deposit in shallow coverage areas,a"geological-physical-chemical"collaborative exploration system has been constructed innovatively,and high precision magnetic surveying,induced polarization,and soil geochemical exploration technologies have been integrated to reveal geophysical-geochemical response characteristics of hidden ore bodies.Through high precision magnetic survey,negative magnetic anomaly areas have been circled,and polarization bands have been identified through induced polarization gradient.Combining with fluoride calcium anomaly tracking,5 target areas have been accurately delineated in Quaternary coverage area of Fangcheng county.It is revealled that the buried depth of the ore body is 36.5~52.3m,and the thickness is 2.6~5.2m.It is confirmed that there is a spatial coupling law between physical and chemical exploration anomalies and the concealed ore body.Geophysical and geochemical characteristics of fluorite deposits in tectonic altered rock types have been revealled.It is proposed that comprehensive geophysical methods and complementary geochemical techniques can effectively suppress ambiguity.This achievement will provide a technical solution for the exploration of concealed fluorite deposits in shallow coverage areas,and has important demonstration significance for the exploration of similar deposits.
作者
闫早华
胡甲齐
李家晓
朱江源
王延浩
周延强
杨本固
YAN Zaohua;HU Jiaqi;LI Jiaxiao;ZHU Jiangyuan;WANG Yanhao;ZHOU Yanqiang;YANG Bengu(No.8 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources(No.8 Institute of Geology and Mineral Resources Exploration of Shandong Province),Key Laboratory of Nonferrous Metal Exploration and Resource Evaluation of Shandong Provincial Bureau of Geology and Mineral Resources,Rizhao Big Data Research Institute of Geology and Geographic Information,Rizhao Key Laboratory of Land Quality Evaluation and Pollution Remediation,Shandong Rizhao 276826,China;Rizhao Economic and Technological Development Zone Branch Bureau of Rizhao Bureau of Natural Resources and Planning,Shandong Rizhao 276826,China)
出处
《山东国土资源》
2025年第8期10-20,共11页
Shandong Land and Resources
关键词
萤石矿
激电中梯
激电测深
高精度磁测
土壤化探
河南方城
Fluorite deposit
induced polarization ladder
induced polarization depth measurement
high precision magnetic survey
geochemical exploration of soil
Fangcheng county in Henan province
