| 粤西-桂东四套成矿系统地质特征、成因类型及构造启示 |
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| 引用本文： | 郑义,余盼,王岳军,林振文.粤西-桂东四套成矿系统地质特征、成因类型及构造启示[J].岩石学报,2017,33(3):682-694. |
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| 作者姓名： | 郑义 余盼 王岳军 林振文 |
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| 作者单位： | 中山大学地球科学与地质工程学院, 广州 510275;广东省地质过程与矿产资源探查重点实验室, 广州 510275,中山大学地球科学与地质工程学院, 广州 510275;广东省地质过程与矿产资源探查重点实验室, 广州 510275,中山大学地球科学与地质工程学院, 广州 510275;广东省地质过程与矿产资源探查重点实验室, 广州 510275,广东省海洋地质调查院, 广州 510075 |
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| 基金项目： | 本文受国家重点研发计划（2016YFC0600408、2016YFC0600506）、国家自然科学基金项目（41402165、41502068）、广东省自然科学基金项目（2016A030310210）和广州市"珠江科技新星"计划（201710010027）联合资助. |
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| 摘 要： | 粤西-桂东地区是我国重要的矿产资源基地,是研究区域成矿作用和大地构造演化耦合关系的理想地区。本文基于粤西-桂东地区四套主要成矿系统的地质特征的研究,结合区域内矿床精确定年和构造演化的研究成果,探讨四套主要成矿系统的成因类型、成矿构造背景及其对钦杭结合带构造演化的启示。其中,广东云浮硫铁矿产于震旦系大绀山组,块状和条带状矿石呈层状产于火山沉积岩系中,是一套与海底热液活动密切相关的VMS成矿系统,形成于新元古代俯冲相关的弧后(间)拉张盆地;盘龙铅锌矿产于泥盆系上伦组,角砾状和胶状矿石产于浅海相白云质碎屑岩中,是一套加里东期被动大陆边缘的SEDEX型铅锌成矿系统;河台金矿田赋存于震旦系乐昌组,脉状矿体严格受断裂和蚀变带控制,是一套变质热液主导的造山型金矿成矿系统,形成于印支-燕山期陆内走滑或陆陆碰撞背景;圆珠顶铜钼矿床形成与燕山期(155Ma)二长花岗斑岩密切相关,细脉浸染状矿石赋存于岩体的内外接触带,是一套陆内伸展背景的斑岩铜钼成矿系统。总体而言,粤西-桂东地区经历了新元古代俯冲、加里东期被动大陆边缘、印支期陆内走滑(或陆陆碰撞)和燕山期陆内伸展四个重要的构造事件,这与钦杭结合带总体构造演化过程一致。
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| 关 键 词： | 成矿系统 大地构造演化 粤西-桂东 大降坪硫铁矿 盘龙铅锌矿 河台金矿田 圆珠顶钼矿 钦杭结合带 |
| 收稿时间： | 2015/5/31 0:00:00 |
| 修稿时间： | 2016/10/29 0:00:00 |
Geological characteristics and genetic types of four series of ore-forming systems at West Guangdong and East Guangxi and their implication for the tectonic evolution of Qinzhou-Hangzhou Joint Belt |
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| ZHENG Yi,YU Pan,WANG YueJun and LIN ZhenWen.Geological characteristics and genetic types of four series of ore-forming systems at West Guangdong and East Guangxi and their implication for the tectonic evolution of Qinzhou-Hangzhou Joint Belt[J].Acta Petrologica Sinica,2017,33(3):682-694. |
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| Authors: | ZHENG Yi YU Pan WANG YueJun and LIN ZhenWen |
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| Institution: | School of Earth Sciences and Geological Engineering, Sun Yat-sen University, Guangzhou 510275, China;Guangdong Provincial Key Lab. of Geological Processes and Mineral Resource Survey, Guangzhou 510275, China,School of Earth Sciences and Geological Engineering, Sun Yat-sen University, Guangzhou 510275, China;Guangdong Provincial Key Lab. of Geological Processes and Mineral Resource Survey, Guangzhou 510275, China,School of Earth Sciences and Geological Engineering, Sun Yat-sen University, Guangzhou 510275, China;Guangdong Provincial Key Lab. of Geological Processes and Mineral Resource Survey, Guangzhou 510275, China and Guangdong Institute of Marine Geological Survey, Guangzhou 510075, China |
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| Abstract: | The area of West Guangdong-East Guangxi is one of the important base providing large amounts of gold, silver, copper, molybdenum, lead, zinc and pyrite, etc. Four main series of ore-forming systems in this area are distinguished. The Dajiangping pyrite deposit, hosted in the Daganshan Formation, is consisted of massive and banded ores, which possibly represent a VMS mineralization system form in a Neoproterozoic back-arc basin. The Panlong sedimentary exhalative (SEDEX) Pb-Zn deposit is hosted in the marine calcite of Devonian Shanglun Formation, interpreted to be formed in a passive continental margin. The Hetai gold deposit in hosted in silicified fracture zones of Sinian metamorphic rocks, which is a typical orogenic gold deposit formed in the Indosinian to Yanshanian collisional or strike-slipping setting. The Yuanzhuding Cu-Mo deposit is related to porphyry granite and formed at 155Ma intra-continental extensive setting. Combining with the published tectonic evolution and geochronological data, the area of West Guangdong and East Guangxi have experienced Neoproterozoic subduction, Devonian passive continental margin, Indosinian-Yanshanian collision (or strike-slip) and Late Yanshanian intra-continental extension, which maybe code the Qinzhou-Hangzhou joint belt also experiencing the similar tectonic evolution. |
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| Keywords: | Ore-forming system Tectonic evolution West Guangdong-East Guangxi Dajiangping pyrite deposit Panlong Pb-Zn deposit Hetai Au deposit Yuanzhuding Cu-Mo deposit Qinzhou-Hangzhou Joint Belt |
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