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Mechanism of molybdenum removal from the sea and its concentration in black shales: EXAFS evidence

Helz, G.R., Miller, C.V., Charnock, J.M., Mosselmans, J.F.W., Pattrick, R.A.D., Garner, C.D., Vaughan, D.J.·1996·Geochimica et Cosmochimica Acta

DOI 10.1016/0016-7037(96)00195-0

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“It should be noted that the accumulation of authigenic Mo, which occurred in the TOC-poor OM formed under oxic conditions, may be affected by oxic conditions due to the lack of H2S required to convert MoO4 2 to MoOxS4-x 2 or MoS4 2 (Helz et al., 1996; Algeo and Rowe, 2012).”
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“highly activated thiomolybdate, which is eventually captured by ferromangous hydroxide or forms metal complexes with humic acid (Helz et al., 1996; Helz et al., 2011).”
Background
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Background
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“Its removal from the water column to sediments requires a reduction reaction through which H2S/HS transforms stable molybdate to particle-reactive thiomolybdates (Helz et al., 1996).”
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“thiomolybdates (Mo4S 2− 4−x, x=0 to 3) (Helz et al., 1996; Zheng et al., 2000) and finally scavenged as particle-reactive thiomolybdate (MoS 4 ) by Fe sulfides and/or sulfur-rich organic materials (Tribovillard et al.”
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“Thiomolybdate then reacts with either Fe sulfides through thiomolybdate–Fe sulfide interactions or organic matter (OM) through Mo–OM interactions, resulting in Mo enrichment in sediments (Helz et al., 1996; Helz et al., 2011).”
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Authors: Helz, G. R., Miller, C. V., Charnock, J. M., Mosselmans, J. F. W., Pattrick, R. A. D., Garner, C. D., & Vaughan, D. J.
Affiliations: University of Maryland, College Park (US)
Daresbury Laboratory (GB)
University of Manchester (GB)
ORCID: Helz, G.R.
Miller, C.V.
Mosselmans, J.F.W.
Pattrick, R.A.D.
Vaughan, D.J.
Venue: Geochimica et Cosmochimica Acta
Publisher: Elsevier BV
Published: 1996-10
Volume: 60
Issue: 19
Pages: 3631-3642
ISSN: 0016-7037 (ISSN-L)
DOI: 10.1016/0016-7037(96)00195-0
OpenAlex: W2042505381
Cited by: 921
References: 58
Citations by year: 2026: 28 · 2025: 46 · 2024: 46 · 2023: 65 · 2022: 52 · 2021: 69 · 2020: 54 · 2019: 48 · 2018: 45 · 2017: 56 · 2016: 43 · 2015: 50 · 2014: 29 · 2013: 41 · 2012: 29
FWCI: 5.39
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Geochimica et Cosmochimica Acta (publishedVersion)
Research Explorer (The University of Manchester) (submittedVersion)
Topics: Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
Physical Sciences › Physics and Astronomy › Radiation › X-ray Spectroscopy and Fluorescence Analysis
Keywords: molybdenum removal, black shales, molybdenum speciation, MoS2, humic acid, sulfidic waters, hydrogen sulfide, molybdenum oxidation state

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Mechanism of molybdenum removal from the sea and its concentration in black shales: EXAFS evidence

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