中国霞里哈木铜镍钴矿床基本金属硫化物中钴和镍的富集:受硫化物原位矿物地球化学的制约

IF 3.2 2区 地球科学 Q1 GEOLOGY Ore Geology Reviews Pub Date : 2024-10-20 DOI:10.1016/j.oregeorev.2024.106300
Shang Liu, Ya-Wen Bao, Ming-Jie Zhang, Xue-Jing Gan, Xi-Zheng Gong, Rong-Qiang Kang
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引用次数: 0

摘要

充电电池行业对钴和镍的需求快速增长,促进了对岩浆硫化铜镍钴矿床成矿理论的研究。夏日哈木铜镍钴矿床是最近在中国发现的富钴岩浆硫化物矿床之一,它典型地分布在造山带,而不像许多同类型矿床那样分布在分异构造环境中。本研究对夏利哈木的贱金属硫化物(BMS,黄铁矿、辉铜矿和黄铜矿)进行了原位元素和硫同位素分析。铁和 Co + Ni 之间的强烈负相关表明,Co 和 Ni 主要以同构态存在于戊铁矿和黄铁矿中。红柱石和黄铁矿的δ34S值一般随Co含量和Co/Ni比值的增加而增加,表明BMS内Co的富集伴随着地壳硫污染的增强。锌、镉、锑和碲被大量优先分馏到中间硫化物溶液(ISS)中,黄铜矿就是从中间硫化物溶液中溶解出来的。蛭石/哈兹堡垒岩中的辉铜矿和黄铁矿的硒含量和硒/硫比远远高于辉长岩中的BMS,而后者的δ34S值一直较高。结合蛭石和辉长岩中 BMS 的 Sb/Se 和 As/Se 比率部分重叠,以及托矿橄榄岩和辉长岩相似的 R 因子计算值,可以推测所研究的霞里哈木辉长岩是由富含 Co-Ni、Se 贫化和严重污染的黑云母岩浆的独立脉冲结晶而成,而不是由超黑云母岩浆通过结晶分馏演化而来。辉长岩中橄榄石和尖晶石的缺乏也促使更多的钴和镍进入硫化物液体中。根据Se/Te比,钻芯XH1E01S中的戊兰特石和黄铁矿来源于硫化液,而硫化液受到单硫化物溶液(MSS)的结晶分馏程度较高。而从演化程度较低的硫化母液中结晶出来的戊铁矿和黄铁矿所含的钴则较少,如从 XH1109 号钻探岩芯中采集到的戊铁矿和黄铁矿。这项研究加强了地壳污染和结晶分馏硫化物液中的单硫化物溶液在BMS(戊兰铁矿和黄铁矿)内富钴过程中的潜在重要性。
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The cobalt and nickel enrichment in base metal sulfides from the Xiarihamu Cu-Ni-Co deposit, China: Constrained by in-situ mineral geochemistry of sulfides
Rapidly growing demand for cobalt and nickel in rechargeable battery industry promotes research on metallogenic theory of magmatic Cu-Ni-Co sulfide deposits. Xiarihamu Cu-Ni-Co deposit, one of the lately discovered Co-rich magmatic sulfide deposits in China, is typical of distribution in orogenic belts, rather than in divergent tectonic settings as many deposits of the same type. In-situ elemental and sulfur isotopic analyses of base metal sulfides (BMS; pyrrhotite, pentlandite, and chalcopyrite) from Xiarihamu were conducted in this study. The strongly negative correlation between Fe and Co + Ni reveals the major occurrence of Co and Ni as isomorphism states in pentlandite and pyrrhotite. The δ34S values of pentlandite and pyrrhotite generally increase with Co contents and Co/Ni ratios, indicating that the Co enrichment within BMS accompanied with enhanced contamination of crustal sulfur. Zinc, Cd, Sb, and Te are significantly and preferentially fractionated into intermediate sulfide solution (ISS) from which chalcopyrite exsolved. The Se contents and Se/S ratios of pentlandite and pyrrhotite in lherzolite/harzburgite are much higher than those of BMS from gabbro, which has systematically higher δ34S values. Combined with the partially overlapped Sb/Se and As/Se ratios of BMS from lherzolite and gabbro, as well as similar calculated R factors of ore-hosting peridotite and gabbro, it is proposed that the studied Xiarihamu gabbro was crystallized from a separate pulse of Co-Ni-enriched, Se-depleted and intensively contaminated mafic parent magma, rather than evolved from ultramafic magma through crystallization fractionation. The lack of olivine and spinel in gabbro also promoted more Co and Ni into sulfide liquid. Based on Se/Te ratios, the pentlandite and pyrrhotite from drill core XH1E01S was originated from sulfide liquid, which suffered higher degree of crystallization fractionation of monosulfide solution (MSS). While pentlandite and pyrrhotite that crystallized from less evolved parent sulfide liquid bear less cobalt, such as those collected from drill core XH1109. This study strengthens the potential importance of crustal contamination and crystallization fractionation of MSS from sulfide liquid during Co enrichment within BMS (pentlandite and pyrrhotite).
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来源期刊
Ore Geology Reviews
Ore Geology Reviews 地学-地质学
CiteScore
6.50
自引率
27.30%
发文量
546
审稿时长
22.9 weeks
期刊介绍: Ore Geology Reviews aims to familiarize all earth scientists with recent advances in a number of interconnected disciplines related to the study of, and search for, ore deposits. The reviews range from brief to longer contributions, but the journal preferentially publishes manuscripts that fill the niche between the commonly shorter journal articles and the comprehensive book coverages, and thus has a special appeal to many authors and readers.
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