滇西北格咱铜多金属矿集区含矿斑岩、不含矿斑岩与全球埃达克岩对比研究  

Comparative Study of Ore-bearing Porphyry,Non-ore-bearing Porphyry and Global Adakite in Geza Copper Polymetallic Ore-concentrated Area,Northwestern Yunnan

作　　者：刘学龙[1] 陈建航 李守奎 李方兰[1] 刘思晗 李振焕 曹振梁 周博文 LIU Xuelong;CHEN Jianhang;LI Shoukui;LI Fanglan;LIU Sihan;LI Zhenhuan;CAO Zhenliang;ZHOU Bowen(School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Geological and Mineral Exploration Institute,Kunming 650051,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南省地质矿产勘查院,云南昆明650051

出　　处：《金属矿山》2022年第12期147-156,共10页Metal Mine

基　　金：云南省基础研究计划项目(编号:2019FA018,2019FB062);国家自然科学基金项目(编号:41862009);云南省科学技术奖-杰出贡献奖项目(编号:2017001);云南省万人计划“青年拔尖人才”专项(编号:20190028)。

摘　　要：云南格咱铜多金属矿集区是西南三江构造—岩浆岩带中义敦岛弧的重要组成部分,位于义敦岛弧带的南端,是三江多岛弧成矿带内重要的斑岩-矽卡岩型铜钼多金属矿产地之一。系统整理了区内15个代表性成矿斑岩体768件岩石地球化学数据,依据Cu含量分为含矿和不含矿两类数据,并与全球埃达克岩数据进行对比研究。采用大数据分析方法,计算了不同元素含量对比值,进行投图后获得交叠率较好的图件共14340幅。研究表明:格咱铜多金属矿集区斑(玢)岩体具有全球埃达克岩属性,但又独具特点,具有明显的高钾性特征。与以高钾钙性系列和钾玄岩系列为主的中国东部埃达克岩特征相似,该区斑(玢)岩体具有更高的w(Al_(2)O_(3))/w(Co)、w(Al_(2)O_(3))/w(Mo)值;相对于不含矿岩体,含矿岩体中Ba、V、Ni、Co等元素的含量区间较为集中,且w(Al_(2)O_(3))/w(Mo)值明显偏低,为格咱铜多金属矿集区岩体含矿性的判别研究提供了科学依据。The Geza copper polymetallic ore-concentrated area in Yunnan is an important part of the Yidun island arc in the Sanjiang tectonic-magmatic belt in Southwest China.It is located in the southern end of the Yidun island arc belt and is one of the important porphyry-skarn copper-molybdenum polymetallic deposits in the Sanjiang metallogenic belt.In this paper,768rock geochemical data of 15 representative ore-forming porphyry bodies in the region are systematically sorted out.According to the copper content,the data are divided into ore-bearing and non-ore-bearing data,and compared with the global adakite data.Using big data analysis method,the comparison values of different elements are calculated,and a total of 14340 maps with good overlap rate are obtained after projection.Studies have shown that the porphyrite rock mass in the Geza copper polymetallic ore-concentrated area has the global adakite attribute but unique characteristics,and has obvious high potassium characteristics.Similar to the characteristics of adakite in Eastern China dominated by high-potassium calcic series and potassium basalt series,the porphyrite rock mass in this area has higher w(Al_(2)O_(3))/w(Co)and w(Al_(2)O_(3))/w(Mo)values.The element contents of Ba,V,Ni and Co in ore-bearing rock are relatively concentrated,and the w(Al_(2)O_(3))/w(Mo)ratio is obviously lower than that in non-ore-bearing rock,which provides a scientific basis for the study of ore-bearing rock in Geza copper polymetallic ore-concentrated area.

关 键 词：含矿斑岩 不含矿斑岩 埃达克岩 大数据 数据挖掘 滇西北 

分 类 号：TD11[矿业工程—矿山地质测量] P61[天文地球—矿床学]