基于成矿构造圈定的柴北缘双口山荒漠景观区地球化学异常特征及其地质意义
The application of the tectonic geochemical thinking in anomaly desert area in Shuangkoushan on the northern margin of Qaidam Basin and its geological significance
徐永利 1郑有业 2许荣科 3蒙守锋 1王三虎1
作者信息
- 1. 甘肃省地质矿产勘查开发局第三地质矿产勘查院,甘肃 兰州 730050;甘肃省金矿资源勘查利用技术创新中心,甘肃 兰州 730050
- 2. 中国地质大学资源学院,湖北 武汉 430074;中国地质大学地质调查研究院,湖北 武汉 430074
- 3. 中国地质大学地质调查研究院,湖北 武汉 430074
- 折叠
摘要
大部分的热液矿床受断裂构造控制,但是基于成矿构造圈定地球化学异常的方法应用目前尚处于探索阶段.柴北缘双口山地区位于青海最重要的柴达木盆地北缘金铅锌银铅锌成矿带上,但该区内广泛分布有荒漠、戈壁等景观,且遭受风成沙等因素的影响,致使诸多地质异常信息被削弱或掩盖,对地质找矿工作造成了一定程度的干扰.针对双口山地区独特的地貌特征及成矿背景,基于成矿构造地球化学方法,对该地区其HS-9-5异常地段1∶1万土壤地球化学测量数据处理,快速优选出了有利地段,经验证发现了多条金矿(化)体.研究结果表明基于构造圈定地球化学异常的方法在构造活动强烈或在明显受构造控制的矿床的勘查工作中效果较佳,是一种值得进一步推广的地球化学勘查方法.本文主要简述其勘查过程及效果,为下一步研究区及相似景观区的矿产勘查工作提供一定的参考.
Abstract
Most of the hydrothermal deposits are controlled by fracture tectonics;however,the application of the method of delineating geochemical anomalies based on metallogenic tectonics is still in the exploratory stage.The Shuangkoushan is situated in the most significant Au-Ag-Pb-Zn metallogenic belt on the northern margin of the Qaidam Basin in Qinghai.However,the area is also characterised by extensive deserts and Gobi landscapes,which have been affected by wind-induced sand formation and other factors.This results in the weakening or concealment of many geological anomalies,and causes a certain degree of interference in geological prospecting.Given the unique geomorphological features and metallogenic background of the Shuangkoushan area,the 1∶10,000 soil geochemical survey data of the HS-9-5 anomaly in this area was processed using the metallogenic tectonic geochemical method.This approach has led to the identification of many favorable sections and the discovery of a number of gold mineralization bodies.This paper demonstrates the efficacy of the geochemical anomaly delineation method based on tectonics in deposits exhibiting strong tectonic activity or tectonic control.Consequently,this geochemical exploration method merits further promotion.The process and outcome of this exploration method are briefly described in this paper,which may serve as a reference for future mineral exploration work in the study area and similar landscapes.
关键词
柴北缘/双口山/荒漠戈壁/金矿/构造地球化学Key words
northern margin of Qaidam Basin/Shuangkoushan/desert and gobi/gold deposit/tectonic geochemistry引用本文复制引用
基金项目
中国地质调查局项目(1212011121204)
青海省地勘基金(青地调勘[2013]121号)
出版年
2024
NETL
NSTL
万方数据