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Contrasting molybdenum cycling and isotopic properties in euxinic versus non-euxinic sediments and sedimentary rocks: Refining the paleoproxies

Scott, Clint, Lyons, Timothy W.·2012·Chemical Geology

DOI 10.1016/j.chemgeo.2012.05.012

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Tong, Z., Zhang, J., Ou, G., Li, Z., Wang, D., Wu, Y., Li, X., & Chen, S. (2024) · Marine and Petroleum Geology · doi:10.1016/j.marpetgeo.2024.106976 · Cited by 3
Early Neoproterozoic oxygenation dynamics along the northern margin of the West African Craton, Anti-Atlas Mountains, Morocco
Fru, E. C., Bankole, O. M., Chraiki, I., Youbi, N., Millet, M., Rouxel, O. J., Albani, A. E., & Bouougri, E. H. (2021) · Chemical Geology · doi:10.1016/j.chemgeo.2021.120404 · Cited by 3
Paleoenvironmental redox evolution of Ediacaran-Cambrian restricted seas in the core of West Gondwana: Insights from trace-metal geochemistry and stratigraphy of the Bambuí Group, east Brazil
Guacaneme, C., Caetano-Filho, S., de Paula-Santos, G. M., Babinski, M., Ferreira, P. L. F., Bedoya-Rueda, C., Kuchenbecker, M., Reis, H., & Trindade, R. I. F. (2022) · Journal of South American Earth Sciences · doi:10.1016/j.jsames.2022.103998 · Cited by 4
Transect variations and controlling factors of redox-sensitive trace element compositions of surface sediments in the South China Sea
Cheng, J., Huang, Y., Wang, S., Miao, L., & Yan, W.-J. (2019) · Continental Shelf Research · doi:10.1016/j.csr.2019.103978 · Cited by 4
Redox fluctuations and organic accumulation on the outer shelf of the Early Cambrian (Ages 2–3) Yangtze sea: Geochemical records on a seaward submarine sill
Zhang, G., Chen, D., Ding, Y., & Huang, T. (2020) · Geological Journal · doi:10.1002/gj.4031 · Cited by 3
“Modern marine studies have shown that Mo concentrations in sediments are commonly < 25 ppm under non-euxinic conditions, and > 100 ppm for permanently euxinic conditions (see Scott & Lyons, 2012).”
Background
The organic, inorganic and isotope geochemistry of the holocene sapropel units in the sea of Marmara and their paleoceanographic significance
Liu, Y., Lu, X., Çağatay, M. N., Zhang, Y., Li, Y., Peng, Y., Ruffine, L., & Lu, H. (2021) · Marine and Petroleum Geology · doi:10.1016/j.marpetgeo.2021.105094 · Cited by 3
Tracking orbital and suborbital climate variability in the westernmost Mediterranean over the past 13,000 years: New insights from paleoperspectives on marine productivity responses
Monedero-Contreras, R. D., Martı́nez-Ruiz, F., Rodríguez‐Tovar, F. J., Mesa-Fernández, J. M., & Sangiorgi, F. (2024) · Quaternary Science Reviews · doi:10.1016/j.quascirev.2024.109001 · Cited by 2
Depositional environments of the organic-rich shales from the Lower Cretaceous Dalazi Formation in the Yanji and Luozigou Basins of Northeast China
Zhao, X., Wang, W., Liu, H., Hu, Y., Zhao, X., Song, C., Guan, C., Zheng, D., & Zhang, H. (2025) · Marine and Petroleum Geology · doi:10.1016/j.marpetgeo.2025.107437 · Cited by 2
Trace-metal hyper-enrichment in Tremadocian black shales of the Baltic Palaeobasin linked to transgression and ultra-slow sedimentation rates
Ndiaye, M., Graul, S., Liiv, M., Kallaste, T., Algeo, T. J., & Hints, R. (2025) · Chemical Geology · doi:10.1016/j.chemgeo.2025.122910 · Cited by 2
Bioturbation Shapes Marine Biogeochemical Cycling Following the End‐Permian Mass Extinction in Northern Pangea
Beaty, B., Foster, W. J., Zuchuat, V., Moller, S. R., Buchwald, S. Z., Brooks, H. L., Rauzi, S., Isson, T. T., Planke, S., Rodríguez-Tovar, F. J., et al. (2025) · Geobiology · doi:10.1111/gbi.70032 · Cited by 2
“In particular, Mo concentrations > 25 ppm have been proposed as indicative of at least intermittent euxinia overlying modern and ancient marine sediments (Scott and Lyons 2012).”
Decoding paleoredox environments and shale gas accumulation in the Niutitang Formation (South China): A pyrite morphology, Fe speciation, and Fe–S isotopes perspective
Shi, M., Cao, Q., Zhang, J., Yuan, Y., Lu, H., & Wang, X. (2025) · Ore Geology Reviews · doi:10.1016/j.oregeorev.2025.107021 · Cited by 2
Formation mechanism and global implications of the early Guadalupian phosphorite deposition along the eastern Palaeo-Tethys upwelling region (South China)
Hu, Z., Zhang, B., Lang, X., Cao, J., & Yao, S. (2025) · Gondwana Research · doi:10.1016/j.gr.2025.11.009 · Cited by 2
Differentiating persistent and intermittent euxinia from the molecular derivatives of green sulfur bacteria carotenoids
French, K. L., Hackley, P. C., & Sperling, E. A. (2025) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2025.12.033 · Cited by 2
Fe–Mn Crust δ 98 Mo Decline Records Tectonic Forcing on Marine Oxide Sink Reduction During the Early Eocene–Early Oligocene
Zhang, L., Ren, J., Chen, H., Wang, H., Sun, Z., Yang, Y., Zhang, H., Wei, Z., Zhang, L., Ren, Y., et al. (2026) · Geophysical Research Letters · doi:10.1029/2025gl120782 · Cited by 2
“However, because Mo preferentially adsorbs onto Mn oxides with minimal adsorption onto Fe oxides (Barling & Anbar, 2004; Kashiwabara et al., 2011; Scott & Lyons, 2012), while W and Tl are efficiently scavenged by both Fe and Mn oxides (Kashiwabara et al., 2017), Fe oxide reduction driven by organic…”
Heavy tungsten isotopes in sulfidic seep sediments linked to carbonate precipitation
Miao, X.-M., Wei, J., Oppo, D., Liu, X.-T., Li, J.-R., Nan, H., Yu, X., Fang, Z., He, Z., Li, J.-T., et al. (2026) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2026.04.033 · Cited by 2
Guidebook for Field Trips in Western Maine and Northern New Hampshire
Johnson, B., & Bates (2017) · doi:10.26780/2017.001.0001 · Cited by 2
Main controlling factors of organic matter enrichment of the Mesoproterozoic source rocks from the North China Craton
Cai, J., Luo, S., Guan, Y., & Dong, P. (2020) · Geological Journal · doi:10.1002/gj.3967 · Cited by 2
“…Mo, U, and V elemental geochemistry has been employed to distinguish suboxic and anoxic-sulphidic redox conditions (Algeo & Maynard, 2004; Scott & Lyons, 2012), using the covariation relationships between the TOC and trace elements (TEs): (a) modest TE enrichment and strong covariation…”
Method
Assessment of Different Digestion Procedures for Mo Isotope Measurements of Black and Grey Shales Using the Double Spike Technique
Li, J., Zhu, X., & Tang, S. (2022) · Journal of Earth Science · doi:10.1007/s12583-021-1520-1 · Cited by 3
“The Mo removal rate is 100× to 1 000× greater in euxinic waters than in oxic waters, leading to significant authigenic enrichment that can exceed 100 ppm (Dahl et al., 2013; Scott and Lyons, 2012; Scott et al., 2008).”
Background
Chemostratigraphic and lithostratigraphic framework of the Eocene Kreyenhagen Formation, Kettleman area, central San Joaquin Basin, California
Giannetta, L. G., & Behl, R. J. (2022) · Geological Society of America eBooks · doi:10.1130/2022.2556(12 · Cited by 2
Aluminium-normalised trace-element paleoredox proxies and their application to the study of the conditions of Burgess Shale-type preservation
Meehan, K. C., Powell, W., McKirdy, D., Hall, P. A., Nedin, C., Johnston, P. A., & Collom, C. (2022) · Australian Journal of Earth Sciences · doi:10.1080/08120099.2023.2137737 · Cited by 2
“Based on this observation, previous studies have proposed that sedimentary Mo concentrations >25 mg g 1 are indicative of at least intermittently euxinic conditions (Dahl et al., 2013; Scott & Lyons, 2012).”
Result
Geochemistry of the Upper Cretaceous - Miocene strata in the Tekman-Karayazı Basin (Turkey): Tectonic processes, sedimentation patterns, and the source rock quality along the northern branch of the Neo-Tethys Basins and northeastern Arabian plate
Ayyıldız, T., Varol, B., Özdemir, A., & Gündoğan, İ. (2023) · Geoenergy Science and Engineering · doi:10.1016/j.geoen.2023.211879 · Cited by 2
Redox Conditions of the Late Ediacaran Ocean on the Southern Margin of the North China Craton
Yang, J., Jin, W., Wang, G.-D., Wan, L., & Zeng, Z. (2023) · Minerals · doi:10.3390/min13091124 · Cited by 2
Heavy Metals in Sediments of Subarctic Meromictic Lakes of the White Sea as Possible Tracers of Environmental Changes
Budko, D. F., Demina, L. L., Krasnova, E. D., & Starodymova, D. P. (2023) · Journal of Marine Science and Engineering · doi:10.3390/jmse11091753 · Cited by 2
“The behavior of Mo in anoxic conditions was elucidated by the reduction of MoO4 oxyanions to MoOxS4-x, forming thiomolybdates that can be adsorbed onto sulfides and organic particles [68,69].”
Background
Lydites in the North Onega Synclinorium, Karelia: Trace Element Composition and Possible Genesis
Кондрашова, Н. И., & Медведев, П. В. (2023) · Lithology and Mineral Resources · doi:10.1134/s0024490223700219 · Cited by 2
“With allowance for the boundary Mo values (Scott and Lyons, 2012), different sedimentation conditions are inferred for the Tetyugino and Shunga sites: eux-inic conditions (absence of oxygen at simultaneous H 2 S presence) for the former and oxygen-free noneuxinic conditions, for the latter.”
BackgroundMethod
Differential Development Mechanisms of Pore Types under the Sequence Stratigraphic Constraints of the Wufeng–Longmaxi Formation Shale from the Upper Yangtze Platform
Wang, X., Xi, Z., Yan, Z., Zhang, S., Tang, S., & Lin, D. (2023) · Processes · doi:10.3390/pr11123436 · Cited by 2
Multiple controls on the preservation of organic matter in the lower Mississippian Luzhai Formation black shale in southern China
Liu, Z., Tian, H., Sageman, B. B., Wu, Y., Li, T., Wang, X., Cen, W., & Chen, J. (2024) · Palaeogeography Palaeoclimatology Palaeoecology · doi:10.1016/j.palaeo.2024.112508 · Cited by 2
Holocene evolution of Lake Faiyum (Egypt): Insights from elemental and molecular proxies
El‐Shafeiy, M., Hamdan, M. A., Birgel, D., Peckmann, J., Karimi, A. W., Zaky, A. S., Flower, R. J., Hassan, F. A., Vogel, H., Anselmetti, F. S., et al. (2024) · Palaeogeography Palaeoclimatology Palaeoecology · doi:10.1016/j.palaeo.2024.112677 · Cited by 2
Deoxygenation preceding the Carnian Pluvial Episode (Late Triassic) in the Qiangtang Basin (Tibetan Plateau): Implications for organic and inorganic geochemistry and petrography
Lin, F., Wang, J., Mansour, A., Fu, X., Su, S., Nie, Y., Ahmed, M. S., Zeng, S., & Li, X. (2025) · Marine and Petroleum Geology · doi:10.1016/j.marpetgeo.2025.107289 · Cited by 2
Unravelling the mechanisms underlying marine redox shifts during sedimentary manganese metallogenesis: insights from the Carboniferous Muhu deposit, China
Dong, Z., Zhang, B.-L., Zhang, L., Dong, F., Li, J., Peng, Z., Wan, B., & Wang, C. (2025) · Mineralium Deposita · doi:10.1007/s00126-024-01343-7 · Cited by 2
“Thresholds for panel B after Scott and Lyons (2012) and Bauer et al. (2022).”
Influential
Antarctic subglacial trace metal mobility linked to climate change across termination III
Piccione, G. G., Blackburn, T. J., Northrup, P. A., Tulaczyk, S. M., & Rasbury, E. T. (2025) · The Cryosphere · doi:10.5194/tc-19-2247-2025 · Cited by 2
Transient oxygenation of the Mediterranean after the Zanclean megaflood
Amarathunga, U., Brocks, J. J., Meijer, P., Hope, J. M., Zachariasse, W. J., Hennekam, R., van der Hoeven, I., Röhl, U., Rule, S., Troitzsch, U., et al. (2025) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2505429122 · Cited by 2
Cadmium isotopic evidence for a collapse of primary productivity during the Hirnantian glaciation and mass extinction
Wu, Y., Tian, H., Li, J., Hu, J., Wang, Y., Gan, C., & Fan, H. (2025) · Chemical Geology · doi:10.1016/j.chemgeo.2025.123017 · Cited by 3
Regional geochemical variations in a metamorphosed black shale: a reconnaissance study of the Silurian Smalls Falls Formation, Maine, USA
Slack, J. F., Baalen, M. R. V., & Reusch, D. N. (2020) · Atlantic Geology · doi:10.4138/atlgeol.2020.010 · Cited by 3
Paleoredox conditions, hydrothermal history, and target vectoring in the MacMillan Pass base-metal district, Yukon, Canada: 1 – Lithogeochemistry of proximal and distal shales
Leighton, C., Leybourne, M. I., Layton‐Matthews, D., Peter, J. M., Gadd, M. G., & Voinot, A. (2021) · The Canadian Mineralogist · doi:10.3749/canmin.2000075 · Cited by 2
Organic Compounds and Metals in the Sediments of Meromictic Lakes Separated from the Kandalaksha Gulf of the White Sea
Budko, D. F., & Nemirovskaya, I. A. (2023) · Geochemistry International · doi:10.1134/s0016702923020027 · Cited by 2
“Molybdenum oxy-anions in the H2S presence are subsequently reduced to thiomolybdates, which then are absorbed by sulfides and organic particles (Helz et al., 2011; Scott and Lyons, 2012).”
Background
Non-traditional Stable Isotope Geochemistry of Seep Deposits
Jin, M., & Feng, D. (2023) · Springer eBooks · doi:10.1007/978-981-99-1494-4_10 · Cited by 2
Reconstruction of Local and Global Marine Redox Conditions During Deposition of Late Ordovician and Early Silurian Organic-Rich Mudrocks in the Siljan Ring District, Central Sweden
Lu, X., Kendall, B., Li, C., Stein, H. J., Hannah, J. L., Gordon, G. W., & Ebbestad, J. O. R. (2015) · UWSpace (University of Waterloo) · Cited by 2

Authors: Scott, C., & Lyons, T. W.
Affiliations: University of California, Riverside (US)
Corresponding author: Scott, Clint
ORCID: Scott, Clint
Lyons, Timothy W.
Venue: Chemical Geology
Publisher: Elsevier BV
Published: 2012-09
Volume: 324-325
Pages: 19-27
ISSN: 0009-2541 (ISSN-L)
DOI: 10.1016/j.chemgeo.2012.05.012
OpenAlex: W2005604628
Cited by: 745
References: 80
Citations by year: 2026: 64 · 2025: 71 · 2024: 65 · 2023: 75 · 2022: 64 · 2021: 75 · 2020: 74 · 2019: 43 · 2018: 50 · 2017: 53 · 2016: 37 · 2015: 32 · 2014: 23 · 2013: 13 · 2012: 5
FWCI: 17.36
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Chemical Geology (publishedVersion)
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 › Earth and Planetary Sciences › Geochemistry and Petrology › Geological and Geochemical Analysis
Keywords: molybdenum isotopes, paleoredox proxies, black shales, total organic carbon, bottom water oxygenation, marine sediment, sedimentary rock

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Contrasting molybdenum cycling and isotopic properties in euxinic versus non-euxinic sediments and sedimentary rocks: Refining the paleoproxies

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