吉林大黑山斑岩型钼矿床成矿阶段及含矿裂隙分布规律  

Mineralization Stages and Joint Distribution Regularity of Daheishan Porphyry Molybdenum Deposit in Jilin Province

作　　者：周伶俐[1,2] 曾庆栋[1] 刘建明[1] 张作伦[1,2] 段晓侠[1,2] 陈文文[3] 李延春 魏金江 

机构地区：[1]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029 [2]中国科学院研究生院,北京100049 [3]东华理工大学,江西344000 [4]吉林大黑山钼业有限公司,吉林132200

出　　处：《地质与勘探》2010年第3期448-454,共7页Geology and Exploration

基　　金：全国危机矿山接替资源找矿综合研究项目:辽吉黑有关地区金多金属矿成矿规律总结研究项目(20089931);国家自然科学基金项目(40972065)

摘　　要：吉林省大黑山钼矿赋矿岩体主要为花岗闪长岩及角砾岩,与成矿相关斑岩为花岗闪长斑岩,斑岩含矿性较差。矿床发生多阶段钼矿化叠加活动:Ⅰ-细石英网脉阶段、Ⅱ-较宽石英网脉阶段、Ⅲ-宽石英网脉阶段、Ⅳ-石英大脉阶段,其中Ⅱ、Ⅲ阶段为主成矿阶段。矿区内不同阶段含矿节理统计玫瑰花图及等密度图结果显示:前三阶段含矿裂隙的形成与斑岩体的侵入密切相关,第Ⅳ阶段的石英大脉走向主要为北西向,可能受区域北西向构造活动的影响;含矿裂隙研究表明大黑山钼矿为典型的斑岩型矿床。The Daheishan molybdenum ore body resides in granodiorite and breccia pipe,and the rock related to mineralization is granodiorite porphyry which is poor in mineralization The hydrothermal mineralization period can be divided into four stages：I. narrow quartz stockwprk stage,II. relatively broad quartz stockwork stage,III. broad quartz stockwork stage,and IV. big quartz vein stage,among which stages II and III are the main mineralization stages. Joint iso-intensity and strike rose diagrams of the Daheishan deposit show that the mineralization stages I^III have a close relationship with the intrusion of porphyry. The faults formed in mineralization stage VI primarily strike in northwest,and probably are the results of regional tectonic activities. The study of ore-bearing fissures presented in this paper demonstrates that the Daheishan molybdenum deposit is a typical porphyry deposit.

关 键 词：大黑山钼矿 含矿石英脉 围岩蚀变 节理 

分 类 号：P618.65[天文地球—矿床学]