Tracing water-rock interaction in carbonate replacement deposits: A SIMS pyrite S-Pb isotope perspective from the Chinese Xinqiao system

doi:10.1016/j.oregeorev.2019.02.022

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Tracing water-rock interaction in carbonate replacement deposits: A SIMS pyrite S-Pb isotope perspective from the Chinese Xinqiao system
	Li, Yang; Li, Qiu-Li; Yang, Jin-Hui
刊名	ORE GEOLOGY REVIEWS
	2019-04-01
卷号	107 页码:248-257
关键词	Cretaceous magmatic-hydrothermal fluids Black shales Porphyry-skarn deposits Yangtze River Metallogenic Belt Stratabound ore deposits Massive sulfide
ISSN号	0169-1368
DOI	10.1016/j.oregeorev.2019.02.022
英文摘要	Deciphering the sources of metals is a prerequisite to establishing genetic models of ore formation, and is of importance for developing exploration models. For most magmatic-hydrothermal deposits, non-magmatic sourced components (e.g., fluids, sulfur and metals) are suggested to have minor or negligible contributions. On the other hand, there is substantial evidence to indicate that external ore-forming components could be crucial for the mineralization of some magmatic-hydrothermal deposits. Here, we conduct a detailed pyrite sulfur and lead isotope study on the Xinqiao stratabound deposit, South China, with the aim of constraining the contributions of ore-forming components from sedimentary rocks and existing mineralization through water-rock interaction. Traditionally, the source of mineralization at Xinqiao is debated. For example, a Cretaceous magmatic-hydrothermal origin was proposed as the sole source of metals. In sharp contrast, a Carboniferous sedimentary sulfide layer as proto-ore, which was enriched later by the Cretaceous magmatic-hydrothermal fluids, is required in a remobilization model. Crystallized pyrite grains from the stratabound orebody (pyl) have a delta S-34 value of 4.09 +/- 1.42 parts per thousand (2 SD), which is similar to that of pyrite grains from the garnet bearing skarn ore (py3). Colloform pyrite ore, which is composed of fine-grained (similar to 500 nm) cubic pyrite grains (py2a), has a delta S-34 value of 0.20 +/- 1.14 parts per thousand. The sulfur isotope composition of pyrite grains from the sandstone hosted quartz-pyrite veins is bimodal with delta S-34 values of 3.28 +/- 6.46 parts per thousand (py4a) and -11.87 +/- 5.43 parts per thousand (py4b). The Pb isotope compositions ((206)/(204)pb approximate to 18.5, (207)/Pb-204 approximate to 15.5) of pyl, py4a and py4b are broadly the same as that of K-feldspar ro from the Cretaceous Jitou diorite, while py2a are more radiogenic ((206)/Pb-204 approximate to 21.5, (207)/(204) Pb approximate to, ro = 18). Our pyrite S and Pb isotope data show no support for the presence of a Carboniferous sedimentary sulfide layer as proto-ore, but instead suggest that leaching sulfur and metals from Permian shales and an unexposed mineralization through water-rock interaction is a vital mechanism for the mineralization at Xinqiao. In line with previous studies, contributions from the late Permian shales are complementary for the stratabound orebody, and recycling existing Mo-Au rich mineralization is key for the formation of sandstone hosted gold rich pyrite-quartz veins. The existing mineralization is not exposed yet, and should be considered in future mineral exploration. Limited sulfur isotope fractionation between pyl, py2 and py3 (0-4 parts per thousand) further indicates a relatively reducing condition during their formation, while significant lower sulfur isotope composition (delta S-34 = 012 parts per thousand) of py4 could imply an oxidizing condition during its formation. Our study highlights that detailed in-situ sulfur and lead isotope analyses under robust geological and petrographic frameworks can tightly constrain the source of ore forming components, yield insights into oxygen fugacity during ore formation, and offer clues for future mineral exploration.
资助项目	National Key Research and Development Program of China[2016YFE0203000] ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences[SKL-K201706]
WOS关键词	FE-AU DEPOSIT ; RIVER METALLOGENIC BELT ; FLUID EVOLUTION ; MINERAL SYSTEMS ; ANHUI PROVINCE ; CONSTRAINTS ; PORPHYRY ; DISTRICT ; GENESIS ; MO
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000470194300016
资助机构	National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/92257]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Li, Yang
作者单位	Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li, Yang,Li, Qiu-Li,Yang, Jin-Hui. Tracing water-rock interaction in carbonate replacement deposits: A SIMS pyrite S-Pb isotope perspective from the Chinese Xinqiao system[J]. ORE GEOLOGY REVIEWS,2019,107:248-257.
APA	Li, Yang,Li, Qiu-Li,&Yang, Jin-Hui.(2019).Tracing water-rock interaction in carbonate replacement deposits: A SIMS pyrite S-Pb isotope perspective from the Chinese Xinqiao system.ORE GEOLOGY REVIEWS,107,248-257.
MLA	Li, Yang,et al."Tracing water-rock interaction in carbonate replacement deposits: A SIMS pyrite S-Pb isotope perspective from the Chinese Xinqiao system".ORE GEOLOGY REVIEWS 107(2019):248-257.