地质学报2023，Vol.97Issue(11)：3604-3621,18.DOI:10.19762/j.cnki.dizhixuebao.2023242
造山带环境钴岩浆成矿作用
Cobalt magmatic mineralization in orogenic settings
摘要
Abstract
The newly discovered Xiarihamu and Shitongkende magmatic nickel-cobalt sulfide deposits in the East Kunlun orogenic belt(EKOB),China are associated with cobalt resources.The cobalt mineralization of these magmatic Ni-Co deposits,combined with different types of independent cobalt deposits such as hydrothermal and sedimentary deposits found in the EKOB,were related to early Paleozoic mafic magmatism to varying degrees.These illustrate the huge metallogenic potential of early Paleozoic mafic magmatism in the EKOB.The Xiarihamu super-scale Ni-Co sulfide deposit has become a typical deposit of Ni-Co large-scale magmatic mineralization in the orogenic settings.Based on the screened existing rock geochemical data,this paper determines the variation characteristics of Co,Ni and Cu etc.metallogenic elements in different lithofacies,and discusses the mafic magmatic cobalt enrichment mechanism and controlling factors.The mafic-ultramafic rocks in the Xiarihamu deposit show higher cobalt contents that varies greatly with different locations(magmatic period),rock and mineral types.The cobalt content is rich in peridotite and pyroxenite facies rocks with high MgO contents.The cobalt content in sulfide ore is the highest.The cobalt content in different types of rocks is positively correlated with the sulfur,nickel and copper content.These results indicated that the Xiarihamu magmas were enriched in Co,and sulfide melt is the main mechanism of cobalt enrichment.The mechanism of cobalt enrichment in minerals during magmatic evolution requires systematic understanding of cobalt occurrence at the atomic level.关键词
钴富集/镁铁质岩浆/夏日哈木镍钴硫化物矿床/东昆仑造山带Key words
cobalt enrichment/mafic magmatism/Xiarihamu Ni-Co sulfide deposit/East Kunlun orogenic belt引用本文复制引用
包亚文,蔡楠,张铭杰,徐文博,张宏福,胡沛青,乔玉财..造山带环境钴岩浆成矿作用[J].地质学报,2023,97(11):3604-3621,18.基金项目
本文为国家自然科学基金项目(编号91962212、42272069、41872075、41872073)和国家重点研发计划项目(编号2022YFC2903504)联合资助的成果.本文研究得到黄河矿业公司科研项目(HHKY-FY-[2021]17)、第二次青藏高原综合科学考察研究(2019QZKK0704)和自然资源部黄河上游战略性矿产资源重点实验室开放课题(YSMRKF202202)的资助,刘月高、李思奥、王小东等参与部分图件绘制与修改讨论,高俊研究员和苏尚国教授的建设性审阅意见极大地提升了论文水平,在此致以衷心的感谢. （编号91962212、42272069、41872075、41872073）
