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云南东川播卡金矿床地质特征、控矿因素及找矿标志
- 作者：
- 刘纯波|张术根|黄超文
- 作者单位：
- 遵义师范学院工学院|中南大学地球科学与信息物理学院|东华理工大学经济与管理学院
基金项目：
- 遵义师范学院博士基金项目（遵师BS〔2019〕09号）；江苏省有色金属华东地质勘查局校企科技项目（苏色华东地科〔2013〕016号）
详细信息：
- 作者简介：
- 刘纯波(1979—)，男，湖南沅陵人，讲师，博士，从事成因矿物学、矿产资源勘查及无机功能材料研究等工作；贵州省遵义市新浦新区平安大道中段，遵义师范学院工学院，563006；E-mail：l_c_b@163.com
- 通讯作者：
- isnull
- PDF下载
Geological characteristics,ore-controlling factors,and ore-prospecting indicators of Boka Gold Deposit in Dongchuan,Yunnan Province
- English Author：
- College of Engineering and Technology,Zunyi Normal College|School of Geoscience and Info-physics,Central South University|School of Economics and Management,East China University of Technology
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
播卡金矿床是20世纪90年代在云南东川地区古—中元古界地层中首次发现的独立岩浆热液型金矿床。在野外地质调查和室内岩矿鉴定的基础上，重点分析了播卡金矿床地质特征，并探讨了其主要控矿因素，总结了找矿标志。结果表明：矿体主要赋存于平顶山组中上部及因民组下部地层中，呈近南北向产出，向东陡倾，多呈不规则囊状，少数呈透镜状或复杂脉状，黄铁矿为主要载金矿物。平顶山组和因民组地层，近南北向断裂破碎带及其与北西向、北东向断裂交会部位，以及钠质闪长岩类岩体均具有明显的控矿作用，为重要的控矿因素。平顶山组中上部及因民组下部地层、近南北向断裂、燕山早期钠质闪长岩类岩体、东川群与汤丹群接触界面、硅化和铁白云石化等围岩蚀变可作为主要找矿标志。
关键词:
控矿因素；找矿标志；矿床地质特征；播卡金矿床；东川
Abstract:
Boka Gold Deposit is an independent magmatic hydrothermal gold deposit first discovered in Paleo-Mesoproterozoic strata in Dongchuan,Yunnan Province in the 1990s.Based on the field geological survey and indoor rock-mineral identification,this paper focused on the geological characteristics of the Boka Gold Deposit,discussed the main ore-controlling factors,and summarized the ore-prospecting indicators for the deposit.The results show that the ore bodies mainly occurred in the middle-upper part of Pingdingshan Formation to the lower part of Yinmin Formation,with a near-SN occurrence and a steep incline to the east.Most of the ore bodies are irregular cryptomere and a few are lens-shaped or complex vein-shaped.Pyrite is the main gold-bearing mineral.The strata of Pingdingshan and Yinmin Formations,the main fracture zone and its intersection with the NW and NE faults,as well as the sodium diorites control the mineralization in the district and are important ore-controlling factors.Strata from the middle-upper part of Pingdingshan Formation to the lower part of Yinmin Formation,the near-NS fracture zone,the early Yanshanian sodium diorites,the contact interface between Dongchuan Group and Tangdan Group,as well as silicification and ferrodolomitization can be used as the main prospecting indicators.
Keywords:
ore-controlling factor;prospecting indicator;deposit geological characteristics;Boka Gold Deposit;Dongchuan