
总第190期 2013年2月
文章编号:10099700(2013)010031-03
南方金属 SOUTHERN METALS
Sum.190 February2013
安徽安庆一月山铜矿床控矿因素及成因浅析
陈昕梦,刘清泉2
(1.河南省有色金属地质矿产局第七地质大队,河南郑州450016: 2.河南省有色金属矿产探测工程技术研究中心,河南郑州450016)
摘要:安庆-月山地区铜铁矿床地处长江中下游弧形铜铁成矿带的东翼近弧顶处.区内石炭系中上统黄龙组、船山组灰岩为成矿提供了部分矿源,矿体赋存部位主要在裙皱的虚脱部位、转折端以及岩体与围岩的接触带,裂隙对矿体的控制作用较明显.区内与铜成矿作用有关的岩体主要为闪长质岩体,通过分析可知,安庆一月山铜矿仍属于
中低温以岩浆热液为主的矽卡岩矿床,为广义上矽卡岩矿床关键调:安庆-月山地区;铜铁矿床;闪长岩体;矽卡岩矿床
中图分类号:P611
文献标识码:A
Ore-controllingfactorsandgeneticanalysisof
Anqing-YueshandepositinAnhui
CHEN Xin-meng,LIU Qing-quan
(1. The 7th Geological Team, Henan Bureau of Non-ferrous Geology and Mineral Resources, Zhengzhou450016, Hen; 2. Non Ferrous Mineral Exploration Engineering Research Center of Henan Province, Zhengzhou450016, Henan)
Abstract: The Anqing-Yueshan Cu-Fe deposit is located in the arc-shaped Cu-Fe metallogenetie belt near the east wing of the middle and lower reaches of the Yangtze river. The limestone of the middle and upper carboniferous Huanglong group and Chuanshan group provided a substantial part of the ore source needed for mineralization, and the ore body was mainly located in the collapse and inflection points of the fold, as well in the contact strip of the rock with invaded rock, thus the ore body was strikingly fracture-controlled. The rock body associated with the copper mineralization in the region was mainly re isoapes aaaa seadonesanae paos skaoro
sulted from the intermediate to low temperature-magmatic hydrothermal liquids. Key words: Anqing-Yueshan area; Cu-Fe deposit; dioritic rock; Skarn deposit
1
区域地质背景
安庆铜铁矿床地处长江中下游弧形铜铁成矿带的东翼近弧顶处.其大地构造位置处于扬子地台北缘下扬予台沿江断裂带中段“"
安庆一月山地区地层单元隶属于扬子地层区下扬子分区安庆地层小区.区内地层从前寒武纪至古生代,中生代地层均有出露.前寒武系“董岭群”为变质基底,由片麻岩和片岩组成,岩性主要为海相碳酸盐岩和碎屑岩,中下泥盆统缺失,自三叠系上统到第四系主要为陆相碎屑岩和火山喷发沉积.区内与
收稿日期:2012-06-20
成矿关系密切的地层主要为石炭系和三叠系碳酸盐岩,其较高的成矿元素丰度值和有利的岩性组合与本区中生代岩浆活动有关(见图1)
区内岩聚浆岩分布产泛,强烈的构造作用和岩浆活动有着密切的成因联系,伴随着构造作用的不同阶段,岩浆活动经历了发生、侵位、定位的顺次过程,燕山早期的断裂活动和基底韧性剪切带以及伴随发生的上地慢楔的局部隆起,位上地慢的部分熔融创造了热力环境;燕山晚期由于受到环太平洋构造的影响,长江中下游地区处于裂解状态,深切的扩张构造和区域性的上地慢隆起产生了碱性玄武岩浆(2)
作者简介:陈昕梦(1988-)女,土家族,2012年中国地质大学(北京)专升本资源勘查与找矿专业,