|本期目录/Table of Contents|

[1]夏昭德,胡秀军,杜 玮,等.塔里木克拉通北缘兴地镁铁—超镁铁质岩带铜镍成矿作用:来自铂族元素地球化学的制约[J].地球科学与环境学报,2023,45(05):1118-1131.[doi:10.19814/j.jese.2023.06029]
 XIA Zhao-de,HU Xiu-jun,DU Wei,et al.Cu-Ni Mineralization of Xingdi Mafic-ultramafic Rock Belt in the Northern Tarim Craton, China: Constraints from PGE Geochemistry[J].Journal of Earth Sciences and Environment,2023,45(05):1118-1131.[doi:10.19814/j.jese.2023.06029]
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塔里木克拉通北缘兴地镁铁—超镁铁质岩带铜镍成矿作用:来自铂族元素地球化学的制约(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第45卷
期数:
2023年第05期
页码:
1118-1131
栏目:
庆贺汤中立院士从事地质工作七十周年专辑
出版日期:
2023-09-15

文章信息/Info

Title:
Cu-Ni Mineralization of Xingdi Mafic-ultramafic Rock Belt in the Northern Tarim Craton, China: Constraints from PGE Geochemistry
文章编号:
1672-6561(2023)05-1118-14
作者:
夏昭德123胡秀军4杜 玮123夏明哲123汪帮耀123焦建刚123张 朋4王厚方4
(1. 长安大学 地球科学与资源学院,陕西 西安 710054; 2. 长安大学 西部矿产资源与地质工程教育部重点实验室,陕西 西安 710054; 3. 长安大学 西安市关键金属成矿与高效利用重点实验室,陕西 西安 710054; 4. 新疆地质矿产勘查开发局第三地质大队,新疆 库尔勒 841000)
Author(s):
XIA Zhao-de123 HU Xiu-jun4 DU Wei123 XIA Ming-zhe123 WANG Bang-yao123 JIAO Jian-gang123 ZHANG Peng4 WANG Hou-fang4
(1. School of Earth Science and Resources, Chang'an University, Xi'an 710054, Shaanxi, China; 2. Key Laboratory of Western China's Mineral Resources and Geological Engineering of Ministry of Education, Chang'an University, Xi'an 710054, Shaanxi, China; 3. Xi'an Key Laboratory for Mineralization and Efficient Utilization of Critical Metals, Chang'an University, Xi'an 710054, Shaanxi, China; 4. No.3 Geological Party, Xinjiang Bureau of Geology & Mineral Resources, Ku'erle 841000, Xinjiang, China)
关键词:
铜镍矿 铂族元素 矿石结构 硫化物 母岩浆 成矿作用 塔里木克拉通
Keywords:
Cu-Ni deposit PGE ore structure sulfide parental magma mineralization Tarim craton
分类号:
P578; P618
DOI:
10.19814/j.jese.2023.06029
文献标志码:
A
摘要:
兴地镁铁—超镁铁质岩带位于塔里木克拉通北缘的库鲁克塔格地块,由兴地Ⅰ号、Ⅱ号、Ⅲ号和Ⅳ号等岩体组成。其中,兴地Ⅰ号和Ⅳ号岩体以辉长岩相为主; 而兴地Ⅱ号和Ⅲ号岩体从橄榄岩相、辉石岩相到辉长岩相均有产出,岩相分带清楚。兴地Ⅱ号和Ⅲ号岩体二辉橄榄岩和二辉岩中均赋存有铜镍硫化物矿(化)体,常见矿石构造有星点状、斑点状、稀疏浸染状和稠密浸染状等,金属硫化物以磁黄铁矿、镍黄铁矿和黄铜矿为主。兴地Ⅱ号和Ⅲ号岩体岩石的铂族元素(PGE)含量(质量分数,下同)((0.41~4.54)×10-9)低,钯组铂族元素(PPGE)含量总体高于铱组铂族元素(IPGE),IPGE/PPGE值为0.08~0.48,原始地幔标准化铂族元素蛛网图呈左倾型。岩石中铂族元素相对于Ni和Cu明显亏损,Pd/Ir值为3.28~23.33,Ni/Cu值为3.67~10.00,表明其母岩浆为高镁玄武质岩浆,这与橄榄石-熔体平衡估算的母岩浆性质一致。全岩Cu/Pd值((6.58~83.33)×104)以及Cu/Zr值与Ni含量的相关性特征表明,在岩浆源区和侵位过程中均发生了硫化物的熔离作用,导致残余岩浆中显著亏损铂族元素。综合分析认为,兴地Ⅱ号和Ⅲ号岩体具有良好的找矿前景。
Abstract:
Xingdi mafic-ultramafic rock belt in the northern Tarim craton is composed of No.Ⅰ, No.Ⅱ, No.Ⅲ and No.Ⅳ intrusions. The lithology of Xingdi No.Ⅰ and No.Ⅳ intrusions is mainly gabbro facies, while Xingdi No.Ⅱ and No.Ⅲ intrusions have various rocks of olivine, pyroxenite and gabbro facies, and the lithofacies zonation is clear. The Cu-Ni sulfide ore bodies are mainly hosted in lherzolite and websterite of Xingdi No.Ⅱ and No.Ⅲ intrusions, and the Cu-Ni sulfide ores are stellate, speckled, sparse-disseminated and dense-disseminated in structure. Most of the sulfides occur as aggregate of pyrrhotite, pentlandite and chalcopyrite. The total contents of platinum group element(PGE)are(0.41-4.54)×10-9 of bulk rocks in Xingdi No.Ⅱ and No.Ⅲ intrusions, which are lower than that of primitive mantle and show positive correlations with MgO contents. The contents of IPGE(Os, Ir and Ru)are slightly higher than that of PPGE(Ru, Pt and Pd)with IPGE/PPGE ratios of 0.08-0.48, and primitive mantle-normalized PGE spider diagrams of rocks are left-declined pattern. Their Pd/Ir and Ni/Cu ratios range from 3.28 to 23.33 and from 3.67 to 10.00, respectively, indicating that parental magmas of Xingdi No.Ⅱ and No.Ⅲ intrusions are high-Mg basaltic. It is consistent with the result estimated from olivine-melt equilibrium. According to bulk rock Cu/Pd ratio((6.58-83.33)×104)and correlation between Cu/Zr and Ni, it is concluded that sulfide dissociation occurs in the source and during emplacement, resulting in a significant loss of PGE in remnant magma. It is comprehensively concluded that Xingdi No.Ⅱ and No.Ⅲ intrusions have good prospecting prospect.

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备注/Memo

备注/Memo:
收稿日期:2023-06-20; 修回日期:2023-09-08投稿网址:http:∥jese.chd.edu.cn/
基金项目:中央高校基本科研业务费专项资金项目(300102279210); 陕西省自然科学基础研究计划项目(2021JM-160); 中国地质调查局地质调查项目(DD20190065)
作者简介:夏昭德(1984-),男,湖南桃江人,副教授,理学博士,E-mail:karlde@163.com。
更新日期/Last Update: 2023-10-15