【引用本文】 郭东旭, 刘晓, 张海兰, 等. 基于红外光谱技术研究云南普朗斑岩铜矿的蚀变和矿化特征[J]. 岩矿测试, 2021, 40(5): 698-709. doi: 10.15898/j.cnki.11-2131/td.202005060002
GUO Dong-xu , LIU Xiao , ZHANG Hai-lan , et al. The Infrared Spectroscopy Characteristics of Alteration and Mineralizationin the Porphyry Copper Deposit in Pulang, Yunnan Province[J]. Rock and Mineral Analysis, 2021, 40(5): 698-709. doi: 10.15898/j.cnki.11-2131/td.202005060002

基于红外光谱技术研究云南普朗斑岩铜矿的蚀变和矿化特征

自然资源实物地质资料中心, 河北 三河 065201

收稿日期: 2020-05-06  修回日期: 2020-08-05 

基金项目: 中国地质调查局地质调查项目"实物地质资料汇集与服务"(DD20190411)

The Infrared Spectroscopy Characteristics of Alteration and Mineralizationin the Porphyry Copper Deposit in Pulang, Yunnan Province

Core and Samples Centre of Land and Resources, Sanhe 065201, China

Received Date: 2020-05-06
Revised Date: 2020-08-05

摘要:近年来红外光谱技术作为一种绿色、快速、无损、精确探测矿物的技术手段而倍受关注,针对斑岩型矿床蚀变矿物高度叠加、蚀变分带界线不明显、细粒蚀变矿物多、黏土蚀变矿物多等特征,该技术在蚀变矿物识别和勘探信息解读等方面优势突出。本文应用红外光谱技术对云南普朗斑岩铜矿区钻孔ZK1801岩心进行矿物识别和蚀变分带划分的研究,识别出钾硅酸盐化带、绿帘石-绿泥石化带、绿泥石-伊利石化带、石英-伊利石化带和泥化带。研究表明:普朗铜矿整个钻孔的蚀变矿物主要有石英、钾长石、绢云母、绿泥石、绿帘石、高岭石、蒙脱石、伊利石等;根据矿化特征,发现铜矿体广泛赋存在钾硅酸盐化带和绿帘石-绿泥石化带中,与矿化关系密切的蚀变矿物“石英+钾长石+绢云母”和“绿帘石+绿泥石”,可以作为普朗矿床勘查的标型蚀变矿物组合;研究区广泛发育的绢云母Al—OH波长随钻孔深度增加而逐渐从2210~2205nm减小到2202~2198nm,Al—OH波长2210~2205nm (长波绢云母)与矿化关系密切,可以作为普朗矿床勘查的指示信息。

关键词: 红外光谱, 蚀变矿物, 蚀变分带, 钾硅酸盐化, 绿帘石-绿泥石化, 斑岩铜矿, 普朗

The Infrared Spectroscopy Characteristics of Alteration and Mineralizationin the Porphyry Copper Deposit in Pulang, Yunnan Province

KEY WORDS: infrared spectroscopy, alteration minerals, alteration zonation, K-silicate alteration, chlorite-chlorite alteration, porphyry copper deposit, Pulang

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基于红外光谱技术研究云南普朗斑岩铜矿的蚀变和矿化特征

郭东旭, 刘晓, 张海兰, 张志国