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
P578%P618; 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0.0...
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Published in | 地球科学与环境学报 Vol. 45; no. 5; pp. 1118 - 1131 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | Chinese |
Published |
长安大学地球科学与资源学院,陕西西安 710054
2023
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 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%新疆地质矿产勘查开发局第三地质大队,新疆库尔勒 841000 |
Subjects | |
Online Access | Get full text |
ISSN | 1672-6561 |
DOI | 10.19814/j.jese.2023.06029 |
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Abstract | P578%P618; 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. |
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AbstractList | P578%P618; 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. |
Author | 张朋 夏昭德 焦建刚 王厚方 夏明哲 胡秀军 杜玮 汪帮耀 |
AuthorAffiliation | 长安大学地球科学与资源学院,陕西西安 710054;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;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%新疆地质矿产勘查开发局第三地质大队,新疆库尔勒 841000 |
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Author_FL | WANG Bang-yao XIA Ming-zhe XIA Zhao-de JIAO Jian-gang ZHANG Peng WANG Hou-fang HU Xiu-jun DU Wei |
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DocumentTitle_FL | Cu-Ni Mineralization of Xingdi Mafic-ultramafic Rock Belt in the Northern Tarim Craton,China:Constraints from PGE Geochemistry |
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Keywords | ore structure 母岩浆 parental magma 铂族元素 铜镍矿 PGE 硫化物 mineralization 塔里木克拉通 Cu-Ni deposit 矿石结构 成矿作用 sulfide Tarim craton |
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Title | 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 |
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