Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia

doi:10.1130/B36903.1.

	Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia
	Xiao, Ming 6,7; Jiang, Yingde 7; Zhao, Guochun 5,6; Yuan, Chao 6,7; Cai, Yue 4; Qiu, Huaning 1,2,3; Hao, Lulu 6,7; Zhang, Wanfeng 6,7; Kong, Lingzhu 6,7
刊名	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
	2024-03-01
卷号	136 期号:3-4 页码:1469-1487
ISSN号	0016-7606
DOI	10.1130/B36903.1.
通讯作者	Jiang, Yingde(jiangyd@gig.ac.cn)
英文摘要	Despite their close temporal and spatial relationships, the effects of tectono-thermal events on ore formation remain obscure. To better understand this process, a comprehensive geochemical investigation on paleofluids from syn-tectonic felsic and quartz veins associated with the Devonian subduction and Permian collision of the Chinese Altai was conducted. We found that the Devonian fluids were organic alkanes-CO2-S-Ca-Mg-rich saline fluids with variable CO2/CH4 (0.09-5.03) and lower F-/SO42- (0.02-0.14) and Al3+/Mg2+ (0-0.11) ratios, whereas the Permian fluids were immiscible fluids including CO2-C4H10-CO-rich oxidized gas bubbles and CH4-C3H8-C2H6-Ca-Na-K-Al-S-Cl-F-rich reduced saline fluids with lower CO2/CH4 (0-1.31, mostly <1) and higher F-/SO42- (0.21-0.76) and Al3+/Mg2+ (0.10-2.56) ratios. The Devonian and Permian fluids also have similar delta C-13-CO2 values of -23.8 parts per thousand to -3.5 parts per thousand and -16.5 parts per thousand to -3.7 parts per thousand, respectively. These data suggest that both fluids derived mainly from devolatilization and dehydration melting of metasediments; the Permian fluids likely involve more biotite melting in the deeper crust and more mantle-derived components, whereas the Devonian fluids contain more meteoric components. Base metal-dominated Devonian mineralization occurred as deep-sourced organic matter- and S-rich fluids promoted base metal migration, whereas the relatively oxidized fluid conditions inhibited the mineralization of many other metals. By contrast, the more reduced and F-rich Permian fluids with more mantle contributions facilitated the extraction of Au and uptakes of rare metals from reworked metasediments and promoted their mineralization. These findings provide a more complete picture of how tectono-thermal events fertilize the crust and demonstrate that syn-tectonic fluids can serve as proxies for metallogenic processes during orogenic cycles in general.
资助项目	National Natural Science Foundation of China[42022017] ; National Natural Science Foundation of China[41730213] ; National Natural Science Foundation of China[41890831] ; National Natural Science Foundation of China[41630315] ; National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[42203026] ; International Partnership Program of Chinese Academy of Sciences[132744KYSB20190039] ; Hong Kong Research Grant Council General Research Fund[17307918] ; HKU Internal Grants for Member of Chinese Academy of Sciences[102009906] ; Distinguished Research Achievement Award[102010100] ; National Science Foundation[EAR -1714892]
WOS关键词	RARE-METAL PEGMATITES ; OROGENIC BELT ; HYDROTHERMAL FLUIDS ; GEODYNAMIC SETTINGS ; ACCRETIONARY WEDGE ; EAST JUNGGAR ; ZN DEPOSIT ; CRUSTAL ; INCLUSIONS ; GOLD
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:001187125300008
资助机构	National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; Hong Kong Research Grant Council General Research Fund ; HKU Internal Grants for Member of Chinese Academy of Sciences ; Distinguished Research Achievement Award ; National Science Foundation
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/43560]
专题	中国科学院南京地质古生物研究所
通讯作者	Jiang, Yingde
作者单位	1.China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China 2.China Univ Geosci Wuhan, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironment, State Key Lab Palaeobiol & Strat, Nanjing 210008, Peoples R China 4.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Northern Taibai St 229, Xian 710069, Peoples R China 5.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China 6.Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 7.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Ming,Jiang, Yingde,Zhao, Guochun,et al. Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2024,136(3-4):1469-1487.
APA	Xiao, Ming.,Jiang, Yingde.,Zhao, Guochun.,Yuan, Chao.,Cai, Yue.,...&Kong, Lingzhu.(2024).Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,136(3-4),1469-1487.
MLA	Xiao, Ming,et al."Syn-tectonic fluids decoding effects of tectono-metamorphic cycles on regional metallogenic evolution of the Chinese Altai, central Asia".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 136.3-4(2024):1469-1487.