摘要
甘肃省肃北县石块地金矿位于南祁连金、铅锌、铜镍、钨、铬成矿带的小黑茨沟-白石头沟金、铜成矿带上,在该成矿带上金矿是优势矿种,成矿带位于Au-As-Sb-Hg组合异常的高背景区,金地球化学块体发育,异常规模大,已发现的金矿位于块体内。金成矿物质形成于志留纪花岗斑岩的成岩初期,成矿元素在矿源层中形成初始富集,成矿物质沿断裂构造继续侵入,断裂为成矿元素的运移提供了通道,通过岩浆热液作用,成矿元素在构造有利部位沉淀、富集,形成金矿体。勘查区内圈定了金矿体9条,矿体赋存在志留纪花岗斑岩,金矿体受北西向断裂构造控制。本文通过研究分析甘肃省肃北县石块地金矿的矿体特征、矿床成因及找矿标志,总结了该区的找矿方向。
Shikuaidi gold deposit in Subei County,Gansu Province is located in xiaoheizigou baishitougou gold and copper metallogenic belt of gold,lead zinc,copper nickel,tungsten and chromium metallogenic belt in South Qilian.In this metallogenic belt,gold is the dominant ore.The metallogenic belt is located in the high background area of Au-As-Sb-Hg assemblage anomaly.The gold geochemical block is developed and the abnormal scale is large.The discovered gold deposit is located in the block.Gold forming minerals were formed in the early diagenetic stage of Silurian granite porphyry.The ore-forming elements are initially enriched in the source bed,and the ore-forming materials continue to invade along the fault structure.Faults provide a channel for the migration of ore-forming elements.Through magmatic hydrothermal action,ore-forming elements precipitate and enrich in favorable parts of the structure to form gold ore bodies.There are 9 gold ore bodies in the inner circle of the exploration area.The ore body is hosted by Silurian granite porphyry,and the gold ore body is controlled by NW trending fault structure.This paper summarizes the prospecting direction of shishidi gold deposit in Subei County,Gansu Province by studying and analyzing the ore body characteristics,deposit genesis and prospecting signs.
作者
张有福
ZHANG You-fu(The Second Institute of Geology and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730020,China)
出处
《世界有色金属》
2022年第13期67-69,共3页
World Nonferrous Metals
关键词
金矿
矿体特征
找矿标志
肃北县
甘肃省
gold mine
Ore body characteristics
Prospecting marks
Subei
Gansu province
