辽宁丹东四道沟金矿床构造控矿规律及其机制分析  

Analysis of Structural Ore-Controlling Rules and Mechanism of the Sidaogou Gold Deposit in Dandong City,Liaoning Province

作　　者：王可勇[1] 万多[1] 刘正宏[1] 孙丰月[1] 边红业 张晓东 黄俊鹏 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]武警黄金第一总队,哈尔滨150086 [3]辽宁丹东四道沟金矿,辽宁丹东118000

出　　处：《吉林大学学报（地球科学版）》2011年第4期1048-1054,共7页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40572117);辽宁丹东三鑫矿业有限公司地质科研项目

摘　　要：辽宁丹东四道沟金矿床为一主体产于古元古代辽河群变质砂岩地层之中、成因上与燕山期中酸性岩浆活动有关的中温热液金矿床。区内工业矿体的空间产出受NE向F3断裂及其上盘竖井背斜构造的联合控制,并表现出如下规律：工业矿体主要沿竖井背斜内发育的层间破碎带产出,因而空间上呈＂带＂状分布特点;主要矿带自东而西在空间上呈现出＂帚＂状展布样式;矿带内主要工业矿体多分布于竖井背斜转折端以西部位,且呈现出SE向倾伏的产出规律,倾伏角一般为30°~35°。综合研究认为,四道沟矿区工业矿体的规律性产出与成矿期NE向断裂的右行斜冲活动方式有直接关系。Located in Dandong City,Liaoning Province,Sidaogou gold deposit is of medium-temperature hydrothermal type,mainly occurs in the meta-sandstone strata of Liaohe Group of Early Proterozoic era,and is genetically related to the intermediate-felsic magmatic activities of the Yanshan episode.The spatial distribution of ore-bodies was jointly controlled by the NE strike F3 fault and the Shujing anticline developed in the hanging wall of F3.The structural ore-controlling regularities are as follows： 1）The ore-bodies occur mainly in the interbedded brecciation zones developed in the Shujing anticline and spatially display in belts;2）The major ore-bodies display in a broom-shaped way from east to west;and 3）The ore-bodies in each ore belt mainly distribute at the western side of the hinge zone of Shujing anticline and clearly flank dip toward SE with the flank dipping angle between 30° to 35°.Based on this comprehensive study,we propose that the regular spatial occurrences of the ore-bodies in the mining district are closely related to the dextrorotation-oblique thrust motion of the NE faults.All these structural ore-controlling rules have both great theoretical and practical significances to the subsequent exploration work in the mining district.

关 键 词：四道沟金矿床 构造控矿规律 矿体定位机制 辽宁丹东 金矿 

分 类 号：P618.51[天文地球—矿床学]