Pyrite δ34S and Δ33S constraints on sulfur cycling at sublacustrine hydrothermal vents in Yellowstone Lake, Wyoming, USA

Andrew P.G. Fowler; Qiu li Liu; Yongshu Huang; Chunyang Tan; Michael W.R. Volk; W. C.Pat Shanks; William Seyfried

doi:10.1016/j.gca.2019.09.004

Pyrite δ³⁴S and Δ³³S constraints on sulfur cycling at sublacustrine hydrothermal vents in Yellowstone Lake, Wyoming, USA

Andrew P.G. Fowler, Qiu li Liu, Yongshu Huang, Chunyang Tan, Michael W.R. Volk, W. C.Pat Shanks, William Seyfried

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Sulfur isotope values (δ³⁴S and Δ³³S) of pyrite in sediment from steam-heated hydrothermal vents on the floor of Yellowstone Lake (WY) were measured using secondary ionization mass spectrometry (SIMS). The high resolution of the SIMS data place important constraints on sulfur cycling processes at/near the vent fluid-lake water interface. Pyrite with a distinct mantle-basalt (δ³⁴S = 0‰) isotope composition (δ³⁴S = +0.5 to +3.1‰) replaces pyrrhotite during incipient stages of alteration at moderately high temperature. Disseminated cubic pyrite (δ³⁴S = +2.0 to +5.3‰) occurs in zones where more extensive oxidation is likely. Framboidal pyrite with δ³⁴S values ranging from –5.2 to +4.1‰ and Δ³³S up to +0.30‰ suggest formation from low-temperature microbial sulfate reduction in sediments near but not directly in the vent fluid up-flow zone. The co-occurrence of pyrite with S isotope values characteristic of distinct formation processes, coupled with notable intra-crystal S isotope variations, suggests the venting locus is dynamic in time and space.

Original language	English (US)
Pages (from-to)	148-162
Number of pages	15
Journal	Geochimica et Cosmochimica Acta
Volume	265
DOIs	https://doi.org/10.1016/j.gca.2019.09.004
State	Published - Nov 15 2019

Bibliographical note

Funding Information:
This work was funded by the National Key R&D Program of China ( 2016YFE0203000 ) and NSF grants EAR 1515377 and OCE 1434798 . The authors thank Dave Lovalvo, Todd Gregory, Bobby Mohr, and Josh Carlson from the Global Foundation for Ocean Exploration for their efforts in obtaining core materials utilized in this study. We thank Yang Li, Yu Liu, Guoqiang Tang for their help during the SIMS analyses. We also thank Dr. Rob Sohn and members of the HD-YLAKE research team for constructive advice. Part of this work was performed at the Institute for Rock Magnetism (IRM) at the University of Minnesota. The IRM is a U.S. National Multi-user Facility supported through the Instrumentation and Facilities program of the National Science Foundation, Earth Sciences Division, and by funding from the University of Minnesota. All work in Yellowstone National Park was completed under an authorized Yellowstone Research permit (YELL-2018-SCI-7018.

Keywords

Hydrothermal dynamics
Pyrite
Pyrrhotite
SIMS
Sublacustrine
Sulfur isotopes
Yellowstone Lake

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10.1016/j.gca.2019.09.004

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@article{22353422c6e54484a32cee946560fa46,

title = "Pyrite δ34S and Δ33S constraints on sulfur cycling at sublacustrine hydrothermal vents in Yellowstone Lake, Wyoming, USA",

abstract = "Sulfur isotope values (δ34S and Δ33S) of pyrite in sediment from steam-heated hydrothermal vents on the floor of Yellowstone Lake (WY) were measured using secondary ionization mass spectrometry (SIMS). The high resolution of the SIMS data place important constraints on sulfur cycling processes at/near the vent fluid-lake water interface. Pyrite with a distinct mantle-basalt (δ34S = 0‰) isotope composition (δ34S = +0.5 to +3.1‰) replaces pyrrhotite during incipient stages of alteration at moderately high temperature. Disseminated cubic pyrite (δ34S = +2.0 to +5.3‰) occurs in zones where more extensive oxidation is likely. Framboidal pyrite with δ34S values ranging from –5.2 to +4.1‰ and Δ33S up to +0.30‰ suggest formation from low-temperature microbial sulfate reduction in sediments near but not directly in the vent fluid up-flow zone. The co-occurrence of pyrite with S isotope values characteristic of distinct formation processes, coupled with notable intra-crystal S isotope variations, suggests the venting locus is dynamic in time and space.",

keywords = "Hydrothermal dynamics, Pyrite, Pyrrhotite, SIMS, Sublacustrine, Sulfur isotopes, Yellowstone Lake",

author = "Fowler, {Andrew P.G.} and Liu, {Qiu li} and Yongshu Huang and Chunyang Tan and Volk, {Michael W.R.} and Shanks, {W. C.Pat} and William Seyfried",

note = "Funding Information: This work was funded by the National Key R&D Program of China ( 2016YFE0203000 ) and NSF grants EAR 1515377 and OCE 1434798 . The authors thank Dave Lovalvo, Todd Gregory, Bobby Mohr, and Josh Carlson from the Global Foundation for Ocean Exploration for their efforts in obtaining core materials utilized in this study. We thank Yang Li, Yu Liu, Guoqiang Tang for their help during the SIMS analyses. We also thank Dr. Rob Sohn and members of the HD-YLAKE research team for constructive advice. Part of this work was performed at the Institute for Rock Magnetism (IRM) at the University of Minnesota. The IRM is a U.S. National Multi-user Facility supported through the Instrumentation and Facilities program of the National Science Foundation, Earth Sciences Division, and by funding from the University of Minnesota. All work in Yellowstone National Park was completed under an authorized Yellowstone Research permit (YELL-2018-SCI-7018. ",

year = "2019",

month = nov,

day = "15",

doi = "10.1016/j.gca.2019.09.004",

language = "English (US)",

volume = "265",

pages = "148--162",

journal = "Geochimica et Cosmochimica Acta",

issn = "0016-7037",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Pyrite δ34S and Δ33S constraints on sulfur cycling at sublacustrine hydrothermal vents in Yellowstone Lake, Wyoming, USA

AU - Fowler, Andrew P.G.

AU - Liu, Qiu li

AU - Huang, Yongshu

AU - Tan, Chunyang

AU - Volk, Michael W.R.

AU - Shanks, W. C.Pat

AU - Seyfried, William

N1 - Funding Information: This work was funded by the National Key R&D Program of China ( 2016YFE0203000 ) and NSF grants EAR 1515377 and OCE 1434798 . The authors thank Dave Lovalvo, Todd Gregory, Bobby Mohr, and Josh Carlson from the Global Foundation for Ocean Exploration for their efforts in obtaining core materials utilized in this study. We thank Yang Li, Yu Liu, Guoqiang Tang for their help during the SIMS analyses. We also thank Dr. Rob Sohn and members of the HD-YLAKE research team for constructive advice. Part of this work was performed at the Institute for Rock Magnetism (IRM) at the University of Minnesota. The IRM is a U.S. National Multi-user Facility supported through the Instrumentation and Facilities program of the National Science Foundation, Earth Sciences Division, and by funding from the University of Minnesota. All work in Yellowstone National Park was completed under an authorized Yellowstone Research permit (YELL-2018-SCI-7018.

PY - 2019/11/15

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N2 - Sulfur isotope values (δ34S and Δ33S) of pyrite in sediment from steam-heated hydrothermal vents on the floor of Yellowstone Lake (WY) were measured using secondary ionization mass spectrometry (SIMS). The high resolution of the SIMS data place important constraints on sulfur cycling processes at/near the vent fluid-lake water interface. Pyrite with a distinct mantle-basalt (δ34S = 0‰) isotope composition (δ34S = +0.5 to +3.1‰) replaces pyrrhotite during incipient stages of alteration at moderately high temperature. Disseminated cubic pyrite (δ34S = +2.0 to +5.3‰) occurs in zones where more extensive oxidation is likely. Framboidal pyrite with δ34S values ranging from –5.2 to +4.1‰ and Δ33S up to +0.30‰ suggest formation from low-temperature microbial sulfate reduction in sediments near but not directly in the vent fluid up-flow zone. The co-occurrence of pyrite with S isotope values characteristic of distinct formation processes, coupled with notable intra-crystal S isotope variations, suggests the venting locus is dynamic in time and space.

AB - Sulfur isotope values (δ34S and Δ33S) of pyrite in sediment from steam-heated hydrothermal vents on the floor of Yellowstone Lake (WY) were measured using secondary ionization mass spectrometry (SIMS). The high resolution of the SIMS data place important constraints on sulfur cycling processes at/near the vent fluid-lake water interface. Pyrite with a distinct mantle-basalt (δ34S = 0‰) isotope composition (δ34S = +0.5 to +3.1‰) replaces pyrrhotite during incipient stages of alteration at moderately high temperature. Disseminated cubic pyrite (δ34S = +2.0 to +5.3‰) occurs in zones where more extensive oxidation is likely. Framboidal pyrite with δ34S values ranging from –5.2 to +4.1‰ and Δ33S up to +0.30‰ suggest formation from low-temperature microbial sulfate reduction in sediments near but not directly in the vent fluid up-flow zone. The co-occurrence of pyrite with S isotope values characteristic of distinct formation processes, coupled with notable intra-crystal S isotope variations, suggests the venting locus is dynamic in time and space.

KW - Hydrothermal dynamics

KW - Pyrite

KW - Pyrrhotite

KW - SIMS

KW - Sublacustrine

KW - Sulfur isotopes

KW - Yellowstone Lake

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JO - Geochimica et Cosmochimica Acta

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