Iron isotope fractionation during skarn-type metallogeny: A case study of Xinqiao Cu-S-Fe-Au deposit in the Middle-Lower Yangtze valley

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	Iron isotope fractionation during skarn-type metallogeny: A case study of Xinqiao Cu-S-Fe-Au deposit in the Middle-Lower Yangtze valley
	Wang, Y (Wang, Yue)4; Zhu, XK (Zhu, Xiang-kun); Mao, JW (Mao, Jing-wen); Li, ZH (Li, Zhi-hong); Cheng, YB (Cheng, Yan-bo)
刊名	ORE GEOLOGY REVIEWS
	2011
卷号	43 期号:1 特刊 SI 页码:194-202
关键词	Iron isotopes Isotope fractionation Xinqiao deposit Fluid exsolution Fluid evolution
ISSN号	0169-1368
英文摘要	Fe isotope compositions of mineral separates and bulk samples from Xinqiao Cu-S-Fe-Au skarn type deposit were investigated. An overall variation in delta(57)Fe values from -1.22 parts per thousand. to +0.73 parts per thousand. has been observed, which shows some regularity. The delta(57)Fe values of endoskarn and the earliest formed Fe-mineral phase magnetite are ca. 1.2 parts per thousand and ca. 0.3 parts per thousand lower, respectively, relative to the quartz-monzodiorite stock, indicating that fluid exsolved from the stock is enriched in light Fe isotopes. Moreover, spatial and temporal variations in delta(57)Fe values are observed, which suggest iron isotope fractionation during fluid evolution. Precipitation of Fe-bearing minerals results in the Fe isotope composition of residual fluids evolving with time. Precipitation of Fe (III) minerals incorporating heavy iron isotopes preferentially leaves the remaining fluid enriched in light isotopes, while precipitation of Fe (II) minerals preferentially taking-up light iron isotopes, and makes the Fe isotopic composition of the fluid progressively heavier. The regularity of Fe isotope variations occurred during fluid exsolution and evolution indicates that the dominant Fe source of Xinqiao deposit is magmatic. Overall, this study demonstrates that Fe isotope composition has great potential in unraveling ore-forming processes, as well as constraining the metal sources of ore deposits. (C) 2010 Elsevier B.V. All rights reserved.
学科主题	矿床地质
WOS关键词	MASSIVE SULFIDE DEPOSITS ; EAST-CENTRAL CHINA ; RIVER ; GREENLAND ; MAGNETITE ; PORPHYRY ; SULFUR ; RATIOS ; CRATON ; RIDGE
WOS研究方向	Geology ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000298906600016
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39426]
专题	中国地质调查局
作者单位	1.[Wang, Yue 2.Zhu, Xiang-kun 3.China Univ Geosci, Fac Earth Sci & Mineral Resources, Beijing 100083, Peoples R China 4.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Wang, Y ,Zhu, XK ,Mao, JW ,et al. Iron isotope fractionation during skarn-type metallogeny: A case study of Xinqiao Cu-S-Fe-Au deposit in the Middle-Lower Yangtze valley[J]. ORE GEOLOGY REVIEWS,2011,43(1 特刊 SI):194-202.
APA	Wang, Y ,Zhu, XK ,Mao, JW ,Li, ZH ,&Cheng, YB .(2011).Iron isotope fractionation during skarn-type metallogeny: A case study of Xinqiao Cu-S-Fe-Au deposit in the Middle-Lower Yangtze valley.ORE GEOLOGY REVIEWS,43(1 特刊 SI),194-202.
MLA	Wang, Y ,et al."Iron isotope fractionation during skarn-type metallogeny: A case study of Xinqiao Cu-S-Fe-Au deposit in the Middle-Lower Yangtze valley".ORE GEOLOGY REVIEWS 43.1 特刊 SI(2011):194-202.