短波红外光谱技术在新疆阿舍勒铜锌矿床勘查中的应用  

Application of short wave infrared technique in exploration of Ashele Cu-Zn deposit in Xinjiang

作　　者：游富华 蒋姣姣[2] 张锦章[2] 赖晓丹[2] YOU Fu-hua;JIANG Jiao-jiao;ZHANG Jin-zhang;LAI Xiao-dan(Sino-Zijin Resources(Beijing)Ltd.,100012 Beijing,China;Zijin Mining Group Co.,Ltd.,Shanghang 364200,China)

机构地区：[1]中色紫金地质勘查(北京)有限责任公司,北京100012 [2]紫金矿业集团股份有限公司,福建上杭364200

出　　处：《岩石矿物学杂志》2021年第5期1010-1022,共13页Acta Petrologica et Mineralogica

基　　金：国家重大科学仪器开发专项(2012YQ05025007)。

摘　　要：新疆阿舍勒铜锌矿床是典型的火山岩型块状硫化物矿床,近年来矿产勘查向深部和外围扩展,由于矿体的厚度较小、埋深大,传统的物化探方法勘查效果不佳,急需寻找快速有效的勘查技术方法。本文在阿舍勒铜锌矿床开展了系统的短波红外光谱(SWIR)勘查研究,结果显示,与矿(化)体关系密切的白云母具有的Al—OH吸收峰位小于2 205 nm,总体具有富Al的特征;与矿(化)体关系密切的绿泥石具有的Fe—OH吸收峰值集中在2 250 nm,具有富Mg特征;白云母结晶度在矿区由南到北呈逐渐升高的趋势,表明热液(矿化中心)主要来自于矿区北部。研究表明,短波红外光谱技术能快速有效地识别出蚀变矿物类型,确定蚀变矿物组合,指示蚀变分带规律;白云母和绿泥石吸收峰波长和白云母结晶度的变化规律,可以作为阿舍勒铜锌矿床找矿的新标志。The Ashele Cu-Zn deposit in Xinjiang is a typical volcanic massive sulfide deposit. In recent years,mineral exploration has been extended to the depth and the periphery. The traditional geophysical and geochemical exploration methods are not effective in mineral exploration as the small thickness and large buried depth of the orebody. It is urgent to find a quick and effective mineral exploration method. This paper introduces the application of short wave infrared( SWIR) technique in the exploration of the Ashele Cu-Zn deposit. The results show that the muscovite closely related to orebody or mineralization has an Al—OH absorption peak position of less than 2 205 nm and is characterized by Al-rich;and that the chlorite closely related to orebody or mineralization has Fe—OH absorption peaks concentrating at 2 250 nm and shows Mg-rich characteristics. The crystallinity of muscovite increases gradually from the south to north,indicating that the hydrothermal fluid( mineralization center) was mainly from the north. The SWIR can identify the alteration minerals quickly and effectively,which is useful to determine the alteration mineral assemblages and reveal the regularity of alteration zoning. The wavelength of absorption peak of muscovite and chlorite and crystallinity of muscovite can be used as new prospecting symbols of the Ashele Cu-Zn deposit.

关 键 词：短波红外光谱 块状硫化物矿床 阿舍勒铜锌矿 新疆 

分 类 号：P618.4[天文地球—矿床学] P575.4[天文地球—地质学]