摘要
黔西南纳板穹窿周缘浅表金矿资源面临枯竭,深部“界面型”隐伏金矿床成为接替资源的关键靶区。本文采用地质、物探、化探、遥感多学科联合勘查方法,系统总结了纳板穹窿周缘的组合矿致异常特征,并结合成矿系统特征进行综合对比总结。研究表明,Au-As-Sb-Hg元素组合化探异常与铁染羟基遥感异常和地表已有金矿点位置一致,对成矿作用具有直接的指示标志;区域重力和宽频大地电磁测深剖面显示纳板穹窿深部存在“侵入状”低密度、中高电阻率、高磁性地质体,推断该区深部存在与成矿物质来源相关的隐伏岩体;纳板穹窿周缘深部二叠纪碳酸盐岩与三叠纪碎屑岩Si/Ca界面(P/T界面)具有明显电阻率梯度带变化特征,并且是该区金矿富集的主要成矿界面。结合以上研究,本文总结了该区矿模型,并构建了基于化探、遥感浅表组合异常来揭示区域成矿地质作用、区域重力、电法剖面探测深部成矿地质结构的综合找矿勘查模式,为该区深部找矿靶区优选和钻探工程部署提供多学科交叉证据支撑。
The shallow gold resources around the Naban dome in southwestern Guizhou are facing depletion,and the interface-typedeep concealed gold deposits have become a key target for replacement resources.This paper adopts a multidisciplinary explorationmethod of geology,geophysics,geochemistry,and remote sensing to systematically summarize the characteristics of the Naban domeand comprehensively compare and summarize them with the characteristics of the metallogenic system.Research has shown thatgeochemical anomalies of Au-As-Sb-Hg elements are consistent with the iron-stained hydroxyl remote sensing anomalies and withknown surface gold occurrences,collectively serving as strong indicators of mineralization.Regional gravity and broadbandmagnetotelluric profiles show the presence of"intrusive"low-density,medium-high resistivity,and high-magnetic anomalies in thesubsurface,inferring the existence of concealed rock masses related to the source of ore-forming materials.Moreover,the Si/Cainterface(P/T interface)between Permian carbonate rocks and Triassic clastic strata at the periphery of the Naban dome exhibits anobvious resistivity gradient zone,acting as the main metallogenic interface for gold enrichment.Based on these findings,this papersummarizes the regional metallogenic model of the area and constructs a comprehensive exploration framework based on thecombination of geochemical exploration,remote sensing shallow surface anomalies to reveal regional metallogenic geologicalprocesses,regional gravity,and electrical profiling to detect deep metallogenic geological structures.
作者
张伟
廖国忠
黄勇
陆建宝
高慧
夏时斌
王平
赵军博
郝梓源
ZHANG Wei;LIAO Guozhong;HUANG Yong;LU Jianbao;GAO Hui;XIA Shibin;WANG Ping;ZHAO Junbo;HAO Ziyuan(Civil-Military Integration Center of China Geological Survey,Chengdu 610036,China;Chengdu Center,ChinaGeological Survey(Geosciences Innovation Center of Southwest China),Chengdu 610218,China;117 Geological Party,Guizhou Bureau of Geology and Mineral Exploration&Development,Guiyang 550018,China;No.136 Geological Party,Chongqing 401147,China;School of Geophysics and Spatial Information,China University of Geosciences,Wuhan 430074,China)
出处
《沉积与特提斯地质》
北大核心
2025年第4期788-805,共18页
Sedimentary Geology and Tethyan Geology
基金
攀西地区铜铁多金属典型矿床勘查技术研究与增储示范(2024ZRBSHZ143)
中国地质调查局地质调查项目(DD20160020-6)
深地国家科技重大专项(2025ZD100950204,2024ZD100020202)。
关键词
界面型金矿
深部找矿
勘查模式
板其金矿
黔西南
interface-type gold deposit
deep prospecting
exploration mode
Banqi gold deposit
Southwest Guizhou
