滇西北普朗铜矿南矿段20线以北蚀变矿物分布特征及组合分带模式  

Alteration mineral distribution characteristics and combination zonation model in the north of prospecting line No.20 at the south section of Pulang copper deposit in Northwest Yunnan

作　　者：董桥峰 陈明勇 沈啟武 舒华伟 李志鹏 吴维虎 唐思宇 DONG Qiaofeng;CHEN Mingyong;SHEN Qiwu;SHU Huawei;LI Zhipeng;WU Weihu;TANG Siyu(Yunnan Diqing Nonferrous Metals Co.,Ltd.,Shangri-La 674400,Yunnan,China;Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.,Kunming 650051,Yunnan,China)

机构地区：[1]云南迪庆有色金属有限责任公司,云南香格里拉674400 [2]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650051

出　　处：《矿产与地质》2021年第5期855-866,共12页Mineral Resources and Geology

基　　金：云南迪庆有色金属有限责任公司科研合作项目(编号:DQYS-ZYB-09-〔2020〕006)资助。

摘　　要：滇西北普朗铜矿为20世纪90年代末发现的超大型斑岩铜(钼)矿床,产于义敦岛弧带南段之格咱弧中,具有斑岩型蚀变控矿的分带模式。为查明普朗铜矿南矿段20线以北蚀变矿物分布特征及矿物组合分带模式,本次采用美国Spectral Evolution公司生产的便携式短波红外光谱测量仪(OreXpress)在研究区内开展红外光谱测量工作,对纵Ⅰ线和32线开展钻孔蚀变矿物数据采集工作,同时抽取20线南部富矿区2线剖面钻孔与研究区作对比。通过工作,有效识别出绿泥石类、黏土类、蛭石、金云母、黑云母、白云母、伊利石等蚀变矿物种类,总结分析了主要蚀变矿物的分布规律,划分出钾化带、绢英岩化带、泥化带、青磐岩化带、角岩(化)带5种蚀变分带模式,指示下步找矿方向。Pulang copper deposit in Northwest Yunnan is a super-large porphyry copper(molybdenum)deposit which is discovered in the late 1990s.It is produced at the Gezhan arc in the southern section of the Yidun Island arc.It has a porphyry-type zonation model of ore-controlling alteration.In order to investigate the distribution characteristics of alteration minerals and mineral assemblage zonation pattern in the north of prospecting line No.20 at the southern section of Pulang copper deposit,a portable short-wave infrared spectrometer(OreXpress)produced by Spectral Evolution Company in the United States is used to carry out infrared spectroscopy in the study area.The data acquisition of drilling hole alteration minerals is carried out on the longitudinal line No.I and line No.32.At the same time,drilling hole alteration mineral data of the profile No.2 in the south rich ore section are extracted for comparison with the study area.Through the survey work,chlorite,clay,vermiculite,phlogopite,biotite,muscovite,illite and other altered minerals have been effectively identified.The distribution regularity of main alteration minerals is also summarized and analyzed.It is divide for five alteration zonation models,potash zone,sericidization zone,argillation zone,propylitization zone and hornfelsic zone.The prospecting direction is indicated for the future work.

关 键 词：普朗铜矿 蚀变分带 短波红外勘查技术 OreXpress 滇西北 

分 类 号：P618.41[天文地球—矿床学] P57[天文地球—地质学]