九瑞矿集区铜多金属矿床岩浆岩成矿作用特征标志  

Characteristic signs of magmatite mineralization of copper polymetallic deposit in Jiurui high ore concentration area

作　　者：周贤旭 胡志戍 张磊 Zhou Xianxu;Hu Zhishu;Zhang Lei(The Second Geological Brigade of Jiangxi Bureau of Geology)

机构地区：[1]江西省地质局第二地质大队

出　　处：《黄金》2022年第5期14-21,共8页Gold

基　　金：“十一五”国家科技支撑项目(2009BAB43B03);“十二五”国家科技支撑项目(2011BAB04B03);中央地质勘查基金项目(2013360007);中国地质调查局发展研究中心项目(121201004000150017-10);江西省地质局地质勘查基金项目(2021AA16)。

摘　　要：九瑞矿集区为长江中下游成矿带重要的铜矿集区。结合最新勘查及研究成果,对该区与内生金属矿床密切相关的燕山期同熔型中酸性岩浆岩成矿作用特征标志进行综合研究,发现岩脉状和岩株状2种不同产出形式岩浆岩成矿作用特征标志存在明显差异,主要表现为与岩株状岩浆岩有关的矿床为中—大型及以上规模,矿种以铜钼(钨)为主;其均一压力相对较低,盐度较高;流体包裹体种类较多,成矿流体经历多次“沸腾”或不混溶作用;围岩蚀变具有中心式蚀变分带特征。与岩脉状岩浆岩相关的矿床多为中型及以下规模,矿种以铜金为主;成矿均一压力相对较高,盐度较低;成矿流体“沸腾”或不混溶作用不够发育,围岩蚀变分带不明显,但往往出现带状硅化或硅质岩。Jiurui high ore concentration area is the most important copper high ore concentration area in the middle and lower Yangtze reaches metallogenic belt.Based on the latest exploration and research results,this paper conducts a comprehensive study of the Yanshannian syntectic intermediate-acid magmatite mineralization characteristics signs closely related to the endogenic metallic deposits in the area,finding that the magmatite mineralization characteristics of the two different output forms of the dyke-like and stock-like rock masses are obviously different,in that the deposits related to the stock-like magmatite are of medium-large scale and above,and the minerals are mainly copper,molybdenum(tungsten);the homogenization pressure is relatively low,and the salinity is high;there are many types of mineral fluid inclusions,and the ore-forming fluid has undergone multiple"boiling"or immiscibility;the wall rock alteration is characterized by centralized alteration zoning.The deposits related to the dyke-like magmatite are mostly medium scale and below,and the minerals are mainly copper and gold;the metallogenic homogenization pressure is relatively high,and the salinity is low;the"boiling"or immiscibility of ore-forming fluids is not well deve-loped,and the alteration zoning is not obvious,but banded silicified or siliceous rocks often appear.

关 键 词：矿集区 铜多金属矿床 成矿岩体 成矿特征 成矿模式 

分 类 号：TD11[矿业工程—矿山地质测量] P611[天文地球—矿床学]