Sulfur isotopes of carbonatite from the giant Maoniuping REE deposit, SW China

doi:10.1016/j.oregeorev.2023.105694

	Weng, Qiang 1; Yang, Wu-Bin 2,3,4; Niu, He-Cai 2,3; Li, Ning-Bo 2,3; Shan, Qiang2,3
	Sulfur isotopes of carbonatite from the giant Maoniuping REE deposit, SW China
刊名	ORE GEOLOGY REVIEWS
ISSN号	0169-1368
	2023-11-01
卷号	162 页码:12
DOI	10.1016/j.oregeorev.2023.105694
语种	英语
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
摘要	Sulfur is an indispensable volatile component, which generally occurs as both sulfides and sulfates in global carbonatite-hosted REE deposits. In this study, we present mineral chemistry and sulfur isotopes of the associated sulfides and sulfates from carbonatite of different settings in the giant Maoniuping REE deposit, SW China, to decipher the magmatic-hydrothermal ore-forming processes. The early-stage carbonatite (stage-I) is barely REE mineralized, with sulfide-dominated sulfur species and melt inclusions in barite. The middle-stage carbonatite (stage-II) is weakly mineralized, with both sulfides and sulfates and barite with melt-fluid inclusions. The latestage carbonatite (stage-III) is intensively REE mineralized, with sulfate-dominated sulfur species and fluid inclusions in barite. Barite from the early- to late-stage carbonatites show a progressively 34S-enriched signature (834S = +1.93%o to +8.10%o), whereas, galena has an increasing 32S-enriched trend (834S = -3.54%o to -16.73%o). The estimated bulk 834S values show an increasing from +0.31 %o to +1.06 %o, and then decrease to -0.08 %o, from the early- to late-stage carbonatites. Principally, these sulfur isotopic shifts may be controlled by the temperature dependence of the sulfur isotope fractionation between crystallizing sulfides/sulfates and magma, but it is dominated by the increasing oxidation state and intensively SO2 degassing of the residual magma in later stages. Mass-balance calculation indicates that more than 45% of gaseous sulfur has been degassed, with about 20 % of gaseous sulfur remaining in the late hydrothermal system. Such post-magmatic SO2 degassing and high SO42- activity may be the crucial controlling factors leading to the instability of REE complexes and REE precipitation and mineralization from the REE-bearing hydrous system.
关键词	Carbonatite Sulfur isotopes Barite and galena Source and processes Giant Maoniuping REE deposit
WOS记录号	WOS:001084150100001
收录类别	SCI
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.gig.ac.cn/handle/344008/78720
专题	中国科学院矿物学与成矿学重点实验室
通讯作者	Yang, Wu-Bin
作者单位	1.Kunming Univ Sci & Technol, Fac Land Resource Engn, Kunming 650093, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Weng, Qiang,Yang, Wu-Bin,Niu, He-Cai,et al. Sulfur isotopes of carbonatite from the giant Maoniuping REE deposit, SW China[J]. ORE GEOLOGY REVIEWS,2023,162:12.
APA	Weng, Qiang,Yang, Wu-Bin,Niu, He-Cai,Li, Ning-Bo,&Shan, Qiang.(2023).Sulfur isotopes of carbonatite from the giant Maoniuping REE deposit, SW China.ORE GEOLOGY REVIEWS,162,12.
MLA	Weng, Qiang,et al."Sulfur isotopes of carbonatite from the giant Maoniuping REE deposit, SW China".ORE GEOLOGY REVIEWS 162(2023):12.