新疆准噶尔北缘加玛特金铜矿区辉长岩锆石U-Pb年龄、岩石地球化学特征及地质意义
发布时间：2018-08-28 13:42
【摘要】：加玛特金铜矿位于准噶尔北缘,矿体赋存于辉长岩与北塔山组玄武岩接触带、石英闪长岩及其接触带,矿体呈脉状和透镜状,成矿与辉长岩和石英闪长岩有关。围岩蚀变主要有绿帘石化、黑云母化、绿泥石化、碳酸盐化、磁铁矿化。获得辉长岩锆石LA-ICP-MS U-Pb年龄为380 Ma,限定金铜矿化略晚于380 Ma。辉长岩的Th、Nb、Ta、Ti、Nd和Zr呈负异常,Rb、K、Pb和P为正异常,LREE表现为相对富集的右倾型分布模式和弱负铕异常到无铕异常,表明辉长岩为中泥盆世俯冲消减环境的产物,形成于岛弧环境。原始岩浆来源于受俯冲物质交代的地幔楔和软流圈的混合体,岩浆经历了一定程度的演化,并受到弱的地壳物质混染。
[Abstract]:Gamat gold copper deposit is located in the northern margin of Junggar. The orebody is located in the contact zone between gabbro and basalt of the Beitashan formation, quartz diorite and its contact zone. The orebody is vein-like and lenticular, and the ore-forming is related to gabbro and quartz diorite. The wall rock alteration mainly includes green curtain, biotite, green mud, carbonation and magnetite. Zircon LA-ICP-MS U-Pb dating of gabbro obtained at 380 Ma, defines gold and copper mineralization slightly later than 380 Ma. The Th,Nb,Ta,Ti,Nd and Zr of the gabbro show negative anomalies (Th,Nb,Ta,Ti,Nd and Zr). The Th,Nb,Ta,Ti,Nd and Zr of the gabbro show positive anomalies, such as the positive anomaly LREE and the weakly negative europium anomaly to the non-europium anomaly, which indicates that the gabbro is the product of the subduction and subduction environment of the Middle Devonian and formed in the island arc environment. The primitive magma originated from the mixture of mantle wedge and asthenosphere metasomatized by subduction material. The magma evolved to a certain extent and was contaminated by weak crustal material.
【作者单位】： 山东省第四地质矿产勘查院;中国科学院新疆生态与地理研究所;新疆维吾尔自治区地质矿产研究所;中国冶金地质总局第一地质勘查院;河北省地矿局探矿技术研究院;中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室;
【基金】：新疆维吾尔自治区天山英才培养工程项目 新疆维吾尔自治区2014年国家高层次人才特殊支持计划项目 国土资源公益性行业科研专项经费项目(201211073)
【分类号】：P597.3;P618.41;P618.51
[Abstract]:Gamat gold copper deposit is located in the northern margin of Junggar. The orebody is located in the contact zone between gabbro and basalt of the Beitashan formation, quartz diorite and its contact zone. The orebody is vein-like and lenticular, and the ore-forming is related to gabbro and quartz diorite. The wall rock alteration mainly includes green curtain, biotite, green mud, carbonation and magnetite. Zircon LA-ICP-MS U-Pb dating of gabbro obtained at 380 Ma, defines gold and copper mineralization slightly later than 380 Ma. The Th,Nb,Ta,Ti,Nd and Zr of the gabbro show negative anomalies (Th,Nb,Ta,Ti,Nd and Zr). The Th,Nb,Ta,Ti,Nd and Zr of the gabbro show positive anomalies, such as the positive anomaly LREE and the weakly negative europium anomaly to the non-europium anomaly, which indicates that the gabbro is the product of the subduction and subduction environment of the Middle Devonian and formed in the island arc environment. The primitive magma originated from the mixture of mantle wedge and asthenosphere metasomatized by subduction material. The magma evolved to a certain extent and was contaminated by weak crustal material.
【作者单位】： 山东省第四地质矿产勘查院;中国科学院新疆生态与地理研究所;新疆维吾尔自治区地质矿产研究所;中国冶金地质总局第一地质勘查院;河北省地矿局探矿技术研究院;中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室;
【基金】：新疆维吾尔自治区天山英才培养工程项目 新疆维吾尔自治区2014年国家高层次人才特殊支持计划项目 国土资源公益性行业科研专项经费项目(201211073)
【分类号】：P597.3;P618.41;P618.51
【参考文献】
相关期刊论文 前10条
1 陈宏强;马生明;岑况;李景运;;新疆东准噶尔拉伊克勒克斑岩型铜矿床岩石地球化学勘查及成矿预测[J];现代地质;2016年03期
2 杜超辉;赵华;刘国仁;;新疆青河县加玛特金铜矿床地质特征及找矿标志[J];新疆有色金属;2015年02期
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