桂西古岩溶型金矿地质特征
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

广西地质矿产局局管科研项目资助。


Geological characteristics of paleokarst type gold deposits in western Guangxi
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    提要:桂西地区自寒武纪至三叠纪发生了多次古侵蚀作用,已大致查明有11次沉积间断时期形成了古岩溶面,其中两次大范围的构造隆升及一次在裂谷拉张期相对持续时间较长的古水下岩溶作用,造成古生界为主的碳酸盐岩系溶蚀尤其强烈,形成大面积的古岩溶面。这些古岩溶面对微细粒浸染型金矿的控制非常明显,部分金矿床虽未直接产于古岩溶面,但其控矿断裂带多与深部古岩溶隐伏带有关系,古岩溶面起到间接控矿作用;主要金矿化的岩性有细碎屑岩、硅质岩、基性及中酸性侵入及喷出岩等,均为硅铝质岩系,而矿化最终底板均为古岩溶面下的碳酸盐岩系。金矿形成机制为:古岩溶潜山构造在后期叠加构造蚀变时,由地层淋滤出的金在古岩溶面及其影响带发生再富集而成矿。

    Abstract:

    Abstract:From the Cambrian to Triassic several erosions took place in western Guangxi. It has been largely ascertained that paleokarst surfaces formed during 11 sedimentary hiatuses in the area. Subaqueous karstification that continued for a relatively long period of time during two extensive tectonic uplifts and one rift extension resulted in strong corrosion of mainly Paleozoic carbonate rock series and formation of extensive paleokarst surface. These paleokarst surfaces exerted very pronounced controlling effects on finely disseminated gold deposits. Part of gold deposits do not directly occur on the paleokarst surfaces, but the ore-controlling faults are mostly related to the hidden paleokarst zones at depths. The paleokarst surfaces have played an indirect role in controlling mineralization. The main mineralized rocks include fine clastic rocks, siliceous rocks and basic and intermediate-acid intrusive and extrusive rocks, which are all sialic rocks; whereas the ultimate footwall rocks of the mineralization are all carbonate rocks below the paleokarst surfaces. The mechanism of gold deposit formation is as follows: when tectonism and metamorphism repeatedly occurred on the buried paleokarst hills, gold leached from the strata was concentrated on the paleokarst erosional surfaces or their influence belts and thus the ore formed.

    参考文献
    相似文献
    引证文献
引用本文

罗允义. 桂西古岩溶型金矿地质特征[J]. 中国地质, 2003, 30(2): 179-185.
LUO Yun-yi. Geological characteristics of paleokarst type gold deposits in western Guangxi[J]. Geology in China, 2003, 30(2): 179-185(in Chinese with English abstract).

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2013-11-19
  • 出版日期:
亮点文章推荐
古人云:工欲善其事,必先利其器。我国新一轮战略找矿行动已全面启动。用什么方法、什么手段实现增储上产是面临的突出问题。本刊登载了几篇基于新技术、新方法实现找矿突破的实例,供大家参阅,助力新一轮战略找矿目标的实现。
基于随机森林算法的找矿预测——以冈底斯成矿带西段斑岩—浅成低温热液型铜多金属矿为例. 欧阳渊等,2023, 50(2):303-330.
基于重磁资料在山东齐河—禹城探获矽卡岩型富铁矿:对超深覆盖区找矿的启示. 王润生等,2023, 50(2):331-346.
自然伽马曲线重构波阻抗反演在勘探含铀有利成矿砂体中的尝试. 梁建刚等,2023, 50(2):347-358.
宽频大地电磁法寻找“界面型”隐伏金矿床:以黔西南戈塘地区深部找矿为例. 张伟等,2023, 50(2):359-375.
页岩气基础地质调查钻井技术研究进展及展望. 赵洪波等,2023, 50(2):376-394.
关闭