赣东北朱溪钨铜矿床辉石矿物光谱-地球化学特征  

Spectral and geochemical characteristics of pyroxene minerals in the Zhuxi tungstencopper deposit in the northeastern Jiangxi,China

作　　者：魏德贤 郭娜[1] 李敬白 王潇 谢周 WEI De-xian;GUO Na;LI Jing-bai;WANG Xiao;XIE Zhou(College of Earth Science,Chengdu University of Technology,Chengdu 610059,China;School of Tourism,Leshan Normal University,Leshan,Sichuan 614000,China)

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]乐山师范学院旅游学院,四川乐山614000

出　　处：《矿物岩石地球化学通报》2023年第4期890-902,913,共14页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：江西省地质勘查基金项目(20150013);国家重点研发计划项目(2018YFC0604105)。

摘　　要：为厘定江西朱溪钨铜矿矿床辉石矿物类型、矿物组合等矿物学特征,深入研究辉石矿物光谱-地球化学特征间的关系,对矿区ZK4208、ZK4210、ZK4211三个钻孔进行热红外光谱、显微镜下鉴定及电子探针综合分析,对矿物中Mg、Fe等主量元素含量进行定量测定,确定研究区辉石矿物以透辉石-钙铁辉石端元为主,并对辉石矿物波长特征与距热源中心距离、矿物主量元素含量间的相关性进行分析。结果表明,钻孔ZK4211中辉石矿物Fe、Mn替代Mg离子的过程可能会导致辉石波长向短波方向移动;样品点至热源中心的距离与辉石矿物的光谱特征呈线性相关关系;自岩体向外围,辉石分布及光谱特征具有分带性。In order to determine the mineralogical characteristics of mineral types and assemblages of pyroxenes in the Zhuxi tungsten copper deposit,Jiangxi Province,and to study the relationship between spectra and geochemical character-istics of pyroxenes,the quantitative determination of contents of major elements such as Mg and Fe in minerals of cores of the ZK4208,ZK4210 and ZK4211 boreholes in the deposit has been carried out by using the thermal infrared spectrosco-py,microscopic identification and electronic probe comprehensive analysis.It is determined that the pyroxene minerals in the study area are mainly diopside-hedenbergite endmembers.Meanwhile,the correlations between the wavelength charac-teristics of pyroxene minerals and the distances from the heat source center,as well as the contents of major elements of minerals have been analyzed.It is found that the process of Fe and Mn replacing Mg cations in pyroxene minerals in Bore-hole ZK4211 may lead to the shift of pyroxene wavelength to short wave direction.The distance from the sample point to the heat source center is linearly correlated with the spectral characteristics of pyroxene minerals.The distribution and spectral characteristics of pyroxenes from the intrusion to the periphery have zonation.

关 键 词：朱溪铜钨矿 热红外光谱 EPMA 勘查模型 

分 类 号：P575.5[天文地球—矿物学] P618.41[天文地球—地质学]