安徽贵池地区岩浆岩演化特征及其与金银多金属矿的关系  

Evolution characteristics of magmatic rocks in the Guichi region, Anhui Province, and its relation to Au-Ag polymetalic mineralization

作　　者：赵德奎[1] 古黄玲 舒旺杰[1] 严志忠 杨晓勇[3] ZHAO De-kui;GU Huang-ling;SHU Wang-jie;YAN Zhi-zhong;YANG Xiao-yong(The324 Geological Team, Anhui Bureau of Geology and Mineral Exploration, Chizhou 247100, China;School of City and Environment, Hunan University of Technology,Zhuzhou 412007, China;School of Earth & Space Sciences, University of Science & Technology of China, Hefei 230026, China)

机构地区：[1]安徽省地质矿产勘查局324地质队,池州247100 [2]湖南工业大学城市与环境学院,株洲412007 [3]中国科学技术大学地球和空间科学学院,合肥230026

出　　处：《华东地质》2019年第2期126-134,共9页East China Geology

基　　金：国家自然科学基金(编号:41173057);安徽省国土资源厅“贵池地区燕山期岩浆岩与金银多金属成矿关系研究(编号:2014-K-04)”项目联合资助

摘　　要：安徽贵池地区铜、铁、金、银、钼、硫等矿产资源丰富,近年来成为新的找矿热点区域之一。通过梳理近年来贵池地区岩浆岩与金银多金属矿床的成矿关系研究成果,并总结该区主要成矿岩体的地球化学特征及成矿规律,发现该区大多数铜金多金属矿床的成矿岩体以花岗闪长(斑/玢)岩为主,成岩年龄集中在135~145/150Ma,高Sr、低Y,轻稀土元素富集,大多数岩体具有埃达克(质)岩的地球化学特征。该区总体为由早期的埃达克(质)岩浅成侵入演变为晚期的A型花岗岩侵入,埃达克(质)岩对该区金银多金属成矿具有一定的指示作用,上述认识对拓展该区找矿思路具有一定的参考意义。The Guichi region has become one of the prospecting targets in recent years for its hosting abundant mineral resources such as gold, silver, copper, molybdenum, sulfur and etc.Based on the regional geological settings of the Guichi area and metallogenic relation between magmatic rocks and Au-Ag polymetallic mineralizationa, this study summarized geochemical properties of ore-forming rocks as well as mineralization regularity.It was discovered that the ore-forming intrusions in most Cu-Au polymetallic deposits are dominated by granodiorite, which belongs to high potassium calc-alkaline and calc- alkaline series, and have the diagenesis age mainly ranging from148 to136 Ma.The granodiorites are strongly enriched in Sr and LREE, but relatively depleted in Y, presenting the geochemical characteristics of adakitic rocks.The high oxygen fugacity resulted in the formation of Cu and Au deposits, indicating that adakitic rocks played a certain role in formation of ore deposits.Therefore, the above understanding has some reference significance for broadening ore prospecting in this area.

关 键 词：岩浆岩 演化特征 成矿规律 金银多金属矿 贵池地区 

分 类 号：P618.51[天文地球—矿床学] P618.52[天文地球—地质学]