甘肃流沙沟金矿床围岩蚀变特征及其与金矿化的关系  

Characteristics of wall rock alteration and its relationship with gold mineralization in Liushagou Gold Deposit,Gansu Province

作　　者：望开磊 缪广 屈海浪 刘文江 白会良 张羿生 韩彪 Wang Kailei;Miao Guang;Qu Hailang;Liu Wenjiang;Bai Huiliang;Zhang Yisheng;Han Biao(Gansu Tianshui Lizi Gold Mining Co.,Ltd.;Beijing Jinyou Geological Exploration Co.,Ltd.)

机构地区：[1]甘肃省天水李子金矿有限公司 [2]北京金有地质勘查有限责任公司

出　　处：《黄金》2023年第3期81-85,共5页Gold

基　　金：中国黄金集团有限公司地质科研专项基金项目(WKY201603)。

摘　　要：流沙沟金矿床位于甘肃省南东部的李子园金多金属矿田内。通过岩矿鉴定和矿物短波红外光谱分析确定了流沙沟金矿床围岩蚀变类型、含量及特征,围岩蚀变主要包括硅化、黄铁绢英岩化、黏土化、碳酸盐化、绿泥石化。定量探讨了围岩蚀变与金成矿之间的关系,认为金矿化强度与绢云母、绿泥石、蒙脱石等蚀变矿物含量呈正相关性,且与较短的绢云母Al-OH波长和较高的伊利石光谱成熟度关系密切,可作为有效找矿标志。Liushagou Gold Deposit is located in the Liziyuan gold polymetallic ore field in the southeast of Gansu Province.In this paper,the types,contents,and characteristics of wall rock alterations in the Liushagou Gold Deposit are determined by rock-mineral identification and mineral short-wave infrared spectrum analysis.The alteration types mainly include silicification,pyrite sericitization,clayization,carbonatization,and chloritization.Through the quantitative discussion of the relationship between wall rock alteration and gold mineralization,it is considered that the gold mineralization intensity is positively correlated with the content of altered minerals such as sericite,chlorite,and montmorillonite,and is closely related to the shorter sericite Al-OH wavelength and the higher spectral maturity of illite,which can be used as an effective prospecting marker.

关 键 词：流沙沟金矿床 围岩蚀变 绢云母化 蚀变矿物 短波红外光谱 找矿标志 

分 类 号：TD11[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]