广西大瑶山大裕金矿地质特征及找矿预测

郭辉; 刘春明; 黄德志; 邹海洋; 陈磊

doi:10.11872/j.issn.1005-2518.2020.01.158

黄金科学技术 >

2020 , Vol. 28 >Issue 1: 12 - 20

DOI: https://doi.org/10.11872/j.issn.1005-2518.2020.01.158

矿产勘查与资源评价

广西大瑶山大裕金矿地质特征及找矿预测

郭辉 ,
刘春明 ,
黄德志 ,
邹海洋 ,
陈磊

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^1.湖南省煤炭地质勘查院，湖南长沙 410014
^2.中南大学地球科学与信息物理学院，湖南长沙 410083
^3.湖南省地震局，湖南长沙 410004

郭辉（1990-），男，湖南郴州人，硕士研究生，从事地质勘查及矿床学研究工作。17374990@qq.com

收稿日期: 2019-08-10

修回日期: 2019-10-29

网络出版日期: 2020-02-26

基金资助

湖南省自然科学基金项目“Ex/Hy广域电磁方法与技术研究”(2015JJ2151)

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Geological Characteristics and Prospecting Prognosis of the Dayu Gold Deposit in Dayaoshan，Guangxi

Hui GUO ,
Chunming LIU ,
Dezhi HUANG ,
Haiyang ZOU ,
Lei CHEN

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^1.The Coal Geological Exploration Institute of Hunan Province，Changsha 410014，Hunan，China
^2.School of Geosciences and Info-Physics，Central South University，Changsha 410083，Hunan，China
^3.Hunan Seismological Bureau，Changsha 410004，Hunan，China

Received date: 2019-08-10

Revised date: 2019-10-29

Online published: 2020-02-26

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摘要

大裕金矿位于广西大瑶山成矿带的古袍成矿区带，构造单元属于桂中—桂东台陷大瑶山凸起东端古袍复式向斜南翼，矿区成矿地质条件优越，但由于对成矿规律认识不足，该区找矿工作推进缓慢。选取成矿带内典型的大裕金矿为例，在总结成矿地质特征的基础上，结合钻孔资料及镜下矿石特征，分析了该区金成矿的控矿因素和成矿规律，认为该区主要控矿构造为NEE向F₁和F₂断裂，赋矿围岩为寒武系小内冲组和黄洞口组浅变质含炭质细碎屑岩，矿化蚀变主要为硅化—黄铁矿化和绢云母化—黄铁矿化—硅化组合蚀变。研究提出该区今后找矿应结合物化探工作，重点找矿方向有：①关注与金成矿关系密切的硅化、黄铁矿化、绢云母（水云母）化及绿泥石化等围岩蚀变线索；②建议在NE-NEE向断裂及其所挟持部位和断裂交会部位开展找矿工作。

关键词： 地质特征; 找矿预测; 成矿规律; 大裕金矿; 大瑶山金成矿带; 广西

本文引用格式

郭辉 , 刘春明 , 黄德志 , 邹海洋 , 陈磊 . 广西大瑶山大裕金矿地质特征及找矿预测[J]. 黄金科学技术, 2020 , 28(1) : 12 -20 . DOI: 10.11872/j.issn.1005-2518.2020.01.158

Abstract

Dayu gold deposit is located in the Gupao metallogenic zone of the Dayaoshan metallogenic belt in Guangxi Province.The structural unit belongs to the Guizhong-Guidong platform depression，east part of Dayaoshan uplift，south part of Gupao compound syncline，where is favorable for mineralization.However，the prospecting work in this area has been restricted by the insufficient understanding of metallogenic regularity.In this paper，we studied the Dayu deposit as a typical deposit in the metallogenic belt.Based on the detailed analysis of the geological characteristics of the gold deposit，combined with the drilling data and the microscopic characteristics of the ore，the ore-controlling factors and metallogenic regularities of the gold mineralization in this area were analyzed.The main ore-controlling structures in this area are NEE-trending faults，F₁ and F₂，and the ore-bearing wall rocks are the Cambrian Xiaoneichong Formation and Huangdongkou Formation，which are mainly composed of shallow metamorphic carbonaceous fine clastic rocks.Wall rock alteration mainly includes silicification and pyritization or sericitization-pyritization-silicification combination alteration.It is suggested that the future gold prospecting works in this area should combine geophysical and geochemical exploration work，and it is necessary to pay attention to silicification，pyritization，sericite，hydromica，chlorite and other wall rock alteration that closely related to gold mineralization.It is proposed to carry out prospecting work at NE-NEE trending faults and its restricted areas as well as intersecting parts.

Key words： geological characteristics; prospecting prognosis; metallogenic regularity; Dayu gold deposit; Dayaoshan gold metallogenic belt; Guangxi

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