Discrimination of two diverse fluid evolutions from the Nanyangtian scheelite deposit, southeastern Yunnan: Evidences from fluid inclusions and mineral geochemistry

doi:10.1016/j.oregeorev.2024.106291

	Discrimination of two diverse fluid evolutions from the Nanyangtian scheelite deposit, southeastern Yunnan: Evidences from fluid inclusions and mineral geochemistry
	Niu, Haobin 1; Sun, Saijun 2,3; Zhang, Binhui 1; Chen, Minhua 1; Zhang, Bin 1; Lu, Shenglin 1; Zhang, Junjie 2; Sun, Weidong2,3 ; Cong, Yanan 4
	2024-11-01
发表期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
卷号	174 页码:14
通讯作者	Sun, Saijun([email protected])
摘要	The Nanyangtian scheelite deposit is located in the Nanwenhe-Song Chay dome (NSCD), southeastern Yunnan. This deposit has undergone four metallogenic stages and is characterized by several kilometers of bedded scheelite-bearing skarn (NYT-II stage), feldspar-bearing quartz veins (NYT-III stage), and sulfides (NYT-IV stage) in the Neoproterozoic schist and gneiss, all of which exhibit similar fold deformations. Throughout the stages, Th and salinity of fluids gradually decrease, weakly and positively correlating, representing a slow cooling process. NYT-I fluids (F-, H2O-rich and high T, p), as indicated by the plagioclase within feldspar-bearing quartz veins, may have directly evolved from a highly fractional residual melt or a salt-rich aqueous melt, signifying the magmatic-hydrothermal transition. From NYT-II to NYT-III fluids, a wider variation of delta O-18(H2O) (-2.4 similar to 5.1 parts per thousand) to a narrow range of delta O-18(H2O) (2.8 similar to 5.1 parts per thousand), and a narrow delta S-34 range (5.18 parts per thousand similar to 8.62 parts per thousand) also indicates that fluids may evolve from the relatively oxidized granitic magma. Furthermore, NYT-I fluids could extend throughout the entire fluid evolution, culminating in two diverse paths: one is a much purer magmatic water towards the NYT-III and NYT-IV fluids, and the other is a more meteoric water-dominated towards the NYT-II fluids. A lower water/rock ratio (W/R) existed in the NYT-II stage, leading to the formation of moderately oxidized Tungsten (W)-skarns and scheelites through the NYT-I salt-rich aqueous melts or their reactions with wall rocks in a stable environment. W/R ratios increased in the NYT-III stage, resulting in the formation of NYTIII feldspar-bearing quartz veins with CO2 generation and alkalinity enhancement. As oxidation diminished, fluids gradually evolved into the NYT-IV fluids, forming sulfides.
关键词	Nanyangtian scheelite deposit W-skarn Feldspar-quartz veins Fluids compositions Mineral chemistry
DOI	10.1016/j.oregeorev.2024.106291
收录类别	SCI
语种	英语
资助项目	China Geological Survey[DD20240071]; China Geological Survey[DD20242001]; China Geological Survey[DD20230031]; China Geological Survey[DD20190053]; National Natural Science Foundation of China[42373049]; National Key R & D Program of China[2023YFF0807103]
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:001344649400001
出版者	ELSEVIER
WOS关键词	OXYGEN-ISOTOPE FRACTIONATION ; MICROTHERMOMETRIC DATA ; SKARN MINERALIZATION ; SILICATE MELTS ; CHEMISTRY ; COMPLEX ; TUNGSTEN ; CHINA ; CONSTRAINTS ; SPECIATION
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/199364
专题	深海极端环境与生命过程研究中心
通讯作者	Sun, Saijun
作者单位	1.China Geol Survey, Geosci Innovat Ctr Southwest China, Chengdu Ctr, Chengdu 610081, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 3.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao 266237, Peoples R China 4.Inner Mongolia Minerals Expt Res Inst, Hohhot 010000, Peoples R China
推荐引用方式 GB/T 7714	Niu, Haobin,Sun, Saijun,Zhang, Binhui,et al. Discrimination of two diverse fluid evolutions from the Nanyangtian scheelite deposit, southeastern Yunnan: Evidences from fluid inclusions and mineral geochemistry[J]. ORE GEOLOGY REVIEWS,2024,174:14.
APA	Niu, Haobin.,Sun, Saijun.,Zhang, Binhui.,Chen, Minhua.,Zhang, Bin.,...&Cong, Yanan.(2024).Discrimination of two diverse fluid evolutions from the Nanyangtian scheelite deposit, southeastern Yunnan: Evidences from fluid inclusions and mineral geochemistry.ORE GEOLOGY REVIEWS,174,14.
MLA	Niu, Haobin,et al."Discrimination of two diverse fluid evolutions from the Nanyangtian scheelite deposit, southeastern Yunnan: Evidences from fluid inclusions and mineral geochemistry".ORE GEOLOGY REVIEWS 174(2024):14.