北祁连清水沟－白柳沟地区铜、多金属成矿地质条件的分析  

ANALYSIS FOR METALLOGENETIC AND GEOLOGICAL CONDITION OF COPPER-MULTI-METAL IN QINGSHUIGOU TO BAILIUGOU REGION, NORTH QILIAN

作　　者：邬介人[1] 于浦生[1] 黄玉春[1] 

机构地区：[1]中国地质科学院西安地质矿产研究所

出　　处：《西北地质科学》1995年第1期50-68,共19页Northwest Geoscience

摘　　要：笔者在该文中着重表达了３方面研究成果：在陈述清水沟－白柳沟地区成矿地质背景基础上，描述了已知工业矿床的基本特征，并将其类比为两类矿床，其一为Ｚｎ－Ｐｂ－Ｃｕ型小铁山式矿床，以展布于郭密寺北火山穹隆北东和南西两侧的下柳沟、弯阳河、下沟及郭密寺矿床为代表；其二为Ｃｕ（－Ｚｎ）型白银厂式矿床，以出露在黑河古火山穹隆北翼近核部的香子沟矿床为实例。成矿前期、成矿时期，以及成矿后期地质条件的分析与概括表明，该地区与白银厂地区在海相火山岩的成岩环境─—裂谷岛弧、火山岩组合──双峰式、古火山机构类型──古火山穹隆，以及成矿机制──海底热液对流循环成矿等诸多方面都具相似性，是寻找铜多金属硫化物矿床的良好地段。提出了该区此类矿床的综合成矿模式，相信它在本地区扩大寻找小铁山式矿床和突破性寻找白银厂式矿床中具有重要指导意义和实际操作意义．esearch achierements in three aspects are mainly expressed here.1.On the basis of the geological metalloginetic background of Qingshuigou-Bailiugou region,the basic characteristics of known industrial deposits are discribed and these deposits are classified into two types by comparision.One is the Xiaotieshan model of Zn-Ph-Cu type ore deposit,represented by Xialiugou,Wanyanghe,Xiagou and Guomisi deposits, which occur to the northeast andsouthwest of an ancient volcanic dome in north of the Guomisi.The other one is Baiyinchang model of Cu(-Zn) type ore deposit represented by Xiangzigou deposit,which occurs to the north but nearby the core of the Heihe ancient volcanic dome.2.By analysing for pre-,during and post-metallogenic geologic conditions,it shows that there are several similarities between regions of Qingshuigou-Bailiugou and Baiyinchang,such as the rift-island arc type marine volcanic rock-forming conditions,the bimodel volcanic assemblages and the ancient volcanic domes as well as the floor hydrothermal circulation metallogenises,etc.and that the former is a favorable for copper-multi-metal sulfide deposit exploring.3.The comprehensive metallogenic model which is proposed here is believed to be of great directive and practical significance for breaking through in exploring both Xiaotieshan and Baiyinchang type deposits.

关 键 词：铜矿床 多金属矿床 成矿地质条件 北祁连山 

分 类 号：P618.410.5[天文地球—矿床学] P618.205[天文地球—地质学]