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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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A 36 kyr geochemical record from the Sea of Japan of organic matter flux variations and changes in intermediate water oxygen concentrations
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Geochemistry of deep sea sediments at cold seep sites in the Nankai Trough: Insights into the effect of anaerobic oxidation of methane
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An evaluation of sedimentary molybdenum and iron as proxies for pore fluid paleoredox conditions
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Heterogeneous redox conditions and a shallow chemocline in the Mesoproterozoic ocean: Evidence from carbon–sulfur–iron relationships
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U/Mo ratios and δ95/95Mo as local and global redox proxies during mass extinction events
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Oxygen, facies, and secular controls on the appearance of Cryogenian and Ediacaran body and trace fossils in the Mackenzie Mountains of northwestern Canada
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“Molybdenum enrichments require the presence of sulfide to convert soluble molybdate to particle-reactive thiomolybdates (Helz et al., 1996), and vanadium enrichments under ferruginous conditions are not well studied.”
Background
A Review of Molybdenum Adsorption in Soils/Bed Sediments: Speciation, Mechanism, and Model Applications
Xu, N., Braida, W., Christodoulatos, C., & Chen, J.-P. (2013) · Soil and Sediment Contamination An International Journal · doi:10.1080/15320383.2013.770438 · Cited by 93
“, DO < 1 mg l−1) and in the presence of dissolved hydrogen sulfide, MoO42− can be sulfurized to tetrathiomolybdate (MoS42−) (Harmer and Sykes, 1980; Luther, 1986; Helz et al., 1996; Erickson and Helz, 2000).”
BackgroundInfluential
Syndepositional diagenetic control of molybdenum isotope variations in carbonate sediments from the Bahamas
Romaniello, S. J., Herrmann, A. D., & Anbar, A. D. (2016) · Chemical Geology · doi:10.1016/j.chemgeo.2016.05.019 · Cited by 92
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“In sulfidic waters, Mo-sulfide precipitates out of solution, leading to strong sedimentary Mo enrichments (S. Emerson and Huested, 1991; Helz et al., 1996).”
Background
Iron isotope and trace metal records of iron cycling in the proto‐North Atlantic during the Cenomanian‐Turonian oceanic anoxic event (OAE‐2)
Owens, J. D., Lyons, T. W., Li, X., MacLeod, K. G., Gordon, G., Kuypers, M. M. M., Anbar, A. D., Kuhnt, W., & Severmann, S. (2012) · Paleoceanography · doi:10.1029/2012pa002328 · Cited by 89
“Molybdenum enrichments are controlled by ambient redox conditions in the water column and sediment, in particular the availability of hydrogen sulfide and organic carbon and the starting concentration of Mo in the basin or ocean [e.g., Helz et al., 1996; Algeo and Lyons, 2006; Lyons et al., 2009].”
Background
Geochemical and isotopic evidence for post-glacial palaeoceanographic changes in Saanich Inlet, British Columbia
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What regulates rhenium deposition in euxinic basins
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Marine redox variations and nitrogen cycle of the early Cambrian southern margin of the Yangtze Platform, South China: Evidence from nitrogen and organic carbon isotopes
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Ocean Circulation in the Toarcian (Early Jurassic): A Key Control on Deoxygenation and Carbon Burial on the European Shelf
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Trace metals in Holocene coastal peats and their relation to pyrite formation (NW Germany)
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“Furthermore, the conservative MoO2y anion shows a parti-4 cle reactive behavior after reaction with soft ligands like humic-bound thiols and the resulting compounds Ž .are more susceptible to reduction Helz et al., 1996 .”
Background
Trace-element deposition in the Cariaco Basin, Venezuela Shelf, under sulfate-reducing conditions: A history of the local hydrography and global climate, 20 ka to the present
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Molybdenum Burial Mechanism in Sulfidic Sediments: Iron-Sulfide Pathway
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Controls on organic matter accumulation on the early-Cambrian western Yangtze Platform, South China
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High-Precision Mass-Dependent Molybdenum Isotope Variations in Magmatic Rocks Determined by Double-Spike MC-ICP-MS
Willbold, M., Hibbert, K. E. J., Lai, Y.-J., Freymuth, H., Hin, R. C., Coath, C. D., Vils, F., & Elliott, T. R. (2015) · Geostandards and Geoanalytical Research · doi:10.1111/j.1751-908x.2015.00388.x · Cited by 103
“During surface processing, the speciation and thus solubility of Mo in aqueous systems strongly depends on the ambient redox conditions (e.g. Emerson and Huested 1991, Helz et al. 1996).”
Background
Mo–Cr isotope evidence for a reducing Archean atmosphere in 3.46–2.76Ga black shales from the Pilbara, Western Australia
Wille, M., Nebel, O., Van Kranendonk, M. J., Schoenberg, R., Kleinhanns, I. C., & Ellwood, M. J. (2013) · Chemical Geology · doi:10.1016/j.chemgeo.2012.12.018 · Cited by 86
Marine redox conditions in the middle Proterozoic ocean and isotopic constraints on authigenic carbonate formation: Insights from the Chuanlinggou Formation, Yanshan Basin, North China
Li, C., Planavsky, N. J., Love, G. D., Reinhard, C. T., Hardisty, D. S., Feng, L., Bates, S. M., Huang, J., Zhang, Q., Chu, X., et al. (2014) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2014.12.005 · Cited by 87
“S phase (e.g., Helz et al., 1996, 2011; Scott and Lyons, 2012).”
Tungsten enriched in submarine hydrothermal fluids
Kishida, K., Sohrin, Y., Okamura, K., & Ishibashi, J.-I. (2004) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2004.03.034 · Cited by 86
Evaluation of Lower Cambrian Shale in Northern Guizhou Province, South China: Implications for Shale Gas Potential
Han, S., Zhang, J., Li, Y., Horsfield, B., Tang, X., Jiang, W., & Chen, Q. (2013) · Energy & Fuels · doi:10.1021/ef400141m · Cited by 85
What the ~1.4 Ga Xiamaling Formation can and cannot tell us about the mid‐Proterozoic ocean
Diamond, C., Planavsky, N. J., Wang, C., & Lyons, T. W. (2018) · Geobiology · doi:10.1111/gbi.12282 · Cited by 85
Episodic euxinia in the Changhsingian (late Permian) of South China: Evidence from framboidal pyrite and geochemical data
Wei, H., Algeo, T. J., Yu, H., Wang, J., Guo, C., & Shi, G. (2015) · Sedimentary Geology · doi:10.1016/j.sedgeo.2014.11.008 · Cited by 86
Geochemical characteristics of Chilean upwelling sediments at ∼36°S
Böning, P., Cuypers, S., Grunwald, M., Schnetger, B., & Brumsack, H. (2005) · Marine Geology · doi:10.1016/j.margeo.2005.07.005 · Cited by 83
Cadmium-isotopic evidence for increasing primary productivity during the Late Permian anoxic event
Georgiev, S., Horner, T. J., Stein, H. J., Hannah, J. L., Bingen, B., & Rehkämper, M. (2014) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2014.11.010 · Cited by 83
Stable isotope fractionation of tungsten during adsorption on Fe and Mn (oxyhydr)oxides
Kashiwabara, T., Kubo, S., Tanaka, M., Senda, R., Iizuka, T., Tanimizu, M., & Takahashi, Y. (2017) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2017.01.031 · Cited by 86
Effect of thermal maturity on remobilization of molybdenum in black shales
Ardakani, O., Chappaz, A., Sanei, H., & Mayer, B. (2016) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2016.06.004 · Cited by 73
Background concentrations of gold in different rock types
Pitcairn, I. (2011) · Applied Earth Science Transactions of the Institutions of Mining and Metallurgy Section B · doi:10.1179/1743275811y.0000000021 · Cited by 81
“The higher concentration of Au in black shales is considered to be due to organic complexation of Au from seawater in anoxic organicrich mud which is eventually incorporated into diagenetic sulphide minerals (Helz et al., 1996).”
Background

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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