西准噶尔布兰萨拉地区金成矿条件及找矿方向探讨  

Geological Characteristics and Prospecting Direction of the Bulansala Area,Western Junggar

作　　者：杨文龙[1] 杨清茂 秦波 尹克宝 陈浩[1] YANG Wenlong;YANG Qingmao;QIN Bo;YIN Kebao;CHEN Hao(Geological Survey No.216,China National Nuclear Corporation,Urumqi,Xinjiang 830011)

机构地区：[1]核工业二一六大队,新疆乌鲁木齐830011

出　　处：《地质与勘探》2021年第5期947-958,共12页Geology and Exploration

基　　金：中国核工业地质局项目“新疆托里-布尔津地区铀矿调查评价与勘查”(编号:201908-1)项目资助。

摘　　要：西准噶尔布兰萨拉地区位于谢米斯台-沙尔布提铜多金属成矿带的西段,区内已发现金矿床、金矿点、矿化点数十处,但目前尚无人对区内的金成矿条件进行系统总结和分析,下一步找矿方向不明确。本文在前人工作基础上,通过收集、整理已有的钻探、槽探、化探等资料,结合实地勘察及样品采集等工作,初步梳理出石英脉型和蚀变岩型两种金矿化成因类型。赋矿地层主要为古生界下志留统谢米斯台组,赋矿岩系为火山碎屑岩,岩性以石英脉、硅化凝灰岩等为主。晚志留世中酸性侵入岩与金矿的关系密切。北东向孟布拉克断裂为研究区内主干断裂,为导矿构造,控制着带内金矿的分布及规模,北东向、近东西向、北北东向的第二级次级断裂是主要的成矿、容矿构造。不同方向构造交汇地段、中酸性侵入体发育地段及金地球化学晕圈分布地段是研究区内下一步金矿找矿方向。The Bulansala area lies in the western section of the Xiemisitai-Shaerbuti copper-polymetallic metallogenic zone in western Jungg,where tens of gold deposits and spots and mineralization points have been found.However,no one has systematically summarized and analyzed the gold metallogenic conditions in the area so the direction of prospecting is not clear.On the basis of previous work,through collecting and sorting out the existing drilling,trough and geochemical data,combined with field investigation and sample collection,this paper preliminarily sorted out the quartz vein type and alteration rock type of gold mineralization.The ore-bearing strata are the Lower Silurian Xiemisitai Formation of Paleozoic,and the ore-bearing rocks are pyroclastic rocks,with dominant quartz veins and silicified tuff in lithology.The intermediate-acid magmatic intrusion of Late Silurian is closely related to gold mineralization.The northeast-trending Mengbulake fault is the main feature that serves as the ore-guiding structure,which controls the distribution and scale of gold deposits in the zone.The main ore-forming and ore-hosting structures are the secondary faults striking in NE,nearly EW and NNE directions.The next step of gold prospecting should be placed at the intersections of structures with different directions,the areas near intermediate-acid intrusions contact zones and the sections of gold geochemical haloes.

关 键 词：金矿 成矿规律 找矿方向 布兰萨拉 西准噶尔 新疆 

分 类 号：P618.2[天文地球—矿床学]