气候变化领域集成服务门户(CCPortal): Pyrite-walled tube structures in a Mesoproterozoic sediment-hosted metal sulfide deposit

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DOI	10.1130/B31504.1
	Pyrite-walled tube structures in a Mesoproterozoic sediment-hosted metal sulfide deposit
	Present T.M.; Bergmann K.D.; Myers C.; Slotznick S.P.; Creveling J.R.; Zieg J.; Fischer W.W.; Knoll A.H.; Grotzinger J.P.
发表日期	2018
ISSN	167606
起始页码	598
结束页码	616
卷号	130 期号:2021-03-04
英文摘要	Unusual decimeter-scale structures occur in the sediment-hosted Black Butte Copper Mine Project deposit within lower Mesoproterozoic strata of the Belt Supergroup, Montana. These low domal and stratiform lenses are made up of millimeter-scale, hollow or mineral-filled tubes bounded by pyrite walls. X-ray micro-computed tomography (micro- CT) shows that the tube structures are similar to the porous fabric of modern diffuse hydrothermal vents, and they do not resemble textures associated with the mineralization of known microbial communities. We determined the sulfur isotopic composition of sulfide minerals with in situ secondary ion mass spectrometry (SIMS) and of texture-specific sulfate phases with multicollector-inductively coupled plasma-mass spectrometry (MCICP- MS). The sedimentological setting, ore paragenesis, sulfur isotope systematics, and porosity structure of these porous precipitates constrain the site of their formation to above the sediment-water interface where metalliferous hydrothermal fluids vented into the overlying water column. These data constrain the geochemistry of the Mesoproterozoic sediment- water interface and the site of deposition for copper-cobalt-silver mineralization. Metals in the hydrothermal fluids titrated sulfide in seawater to create tortuous fluid-flow conduits. Pyrite that precipitated at the vent sites exhibits large sulfur isotope fractionation (>50‰), which indicates a close association between the vents and sulfate-reducing microbiota. In the subsurface, base metal sulfides precipitated from sulfide formed during the reduction of early diagenetic barite, also ultimately derived from seawater. This model suggests dynamic bottom-water redox conditions at the vent site driven by the interplay between sulfate-reducing organisms and metalliferous fluid effluence. © 2017 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185061
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, MC 170-25, Pasadena, CA 91125, United States; Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, United States; Tintina Resources Inc., 17 E. Main Street, P.O. Box 431, White Sulphur Springs, MT 59645, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States; Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, United States; Department of Earth and Planetary Science, University of California, Berkeley, 307 McCone Hall, Berkeley, CA 94720, United States; College of Earth, Ocean and Atmospheric Sciences, Oregon State University, 104 CEOAS Administration Building, Corvallis, OR 97331, United States
推荐引用方式 GB/T 7714	Present T.M.,Bergmann K.D.,Myers C.,et al. Pyrite-walled tube structures in a Mesoproterozoic sediment-hosted metal sulfide deposit[J],2018,130(2021-03-04).
APA	Present T.M..,Bergmann K.D..,Myers C..,Slotznick S.P..,Creveling J.R..,...&Grotzinger J.P..(2018).Pyrite-walled tube structures in a Mesoproterozoic sediment-hosted metal sulfide deposit.Bulletin of the Geological Society of America,130(2021-03-04).
MLA	Present T.M.,et al."Pyrite-walled tube structures in a Mesoproterozoic sediment-hosted metal sulfide deposit".Bulletin of the Geological Society of America 130.2021-03-04(2018).