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Mechanism of molybdenum removal from the sea and its concentration in black shales: EXAFS evidence
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“in the presence of abundant (10 -3 -10 -4 M) free hydrogen sulfide, Mo is converted to a series of particle-reactive thiomolybdates and is efficiently removed from seawater (the so-called Mo”
From Trace elements at the intersection of marine biological and geochemical evolution (2016) · cites this paper as Helz et al., 1996
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Trace metals as paleoredox and paleoproductivity proxies: An update
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“Helz et al. (1996) introduced the concept of a geochemical switch, through which H2S/HS − transforms Mo from a conservative element to particle-reactive species, in marine depositional environments.”
BackgroundInfluentialTrace-element behavior and redox facies in core shales of Upper Pennsylvanian Kansas-type cyclothems
Algeo, T. J., & Maynard, J. B. (2004) · Chemical Geology · doi:10.1016/j.chemgeo.2003.12.009 · Cited by 1,736
“2b; Table 4), suggesting limited Mo uptake by both organic carbon and Fe-sulfides (Fig.”
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Algeo, T. J., & Tribovillard, N. (2009) · Chemical Geology · doi:10.1016/j.chemgeo.2009.09.001 · Cited by 1,631
“Trace-metal concentrations have long been used to draw inferences concerning paleoredox conditions (Brumsack, 1980; Wignall and Myers, 1988; Dean et al., 1999; Tribovillard et al., 2006), in which samples are generally classified as oxic (>2.0 ml O2 L−1), dysoxic or suboxic (∼0.2–2.0 ml O2 L−1), anoxic–nonsulfidic (<0…”
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“, absorption onto humic substances [Brumsack, 1989; Helz et al., 1996] or particulate Mn-oxyhydroxides [Berrang and Grill, 1974; Magyar et al.”
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“…there is debate over the mechanisms involved in Mo enrichment is that, whereas some larger, identifiable molybdenum sulfide forms may occur much of the molybdenum in black shales and sediments deposited in euxinic environments is submicron, dispersed, and of uncertain form (Helz et al., 1996).”
BackgroundTribovillard, N., Algeo, T. J., Baudin, F., & Riboulleau, A. (2011) · Chemical Geology · doi:10.1016/j.chemgeo.2011.09.009 · Cited by 825
“Thiomolybdate formation occurs only in the presence of free hydrogen sulfide (H2S) (Helz et al., 1996, 2011) and, thus, at a lower redox potential than that for sedimentary uptake of U, creating the potential for enhanced uptake of U relative toMowhere suboxic conditions prevail (Algeo and Tribovillard, 2009).”
BackgroundInfluentialScott, C., & Lyons, T. W. (2012) · Chemical Geology · doi:10.1016/j.chemgeo.2012.05.012 · Cited by 745
Sageman, B. B., Murphy, A. E., Werne, J. P., Straeten, C. A. V., Hollander, D. J., & Lyons, T. W. (2003) · Chemical Geology · doi:10.1016/s0009-2541(02)00397-2 · Cited by 711
“Accumulation of a series of redox-sensitive metals reflects the succession of microbial regimes under which OM is degraded (Berner, 1980): Mn accumulation typically indicates oscillating redox conditions (Calvert and Pedersen, 1996); similarly, oscillation through the zone of denitrification may result in relative inc…”
BackgroundMolybdenum isotope evidence for widespread anoxia in mid-Proterozoic oceans
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Molybdenum(VI) speciation in sulfidic waters:
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Molybdenum isotope records as a potential new proxy for paleoceanography
Siebert, C., Nägler, T. F., von Blanckenburg, F., & Kramers, J. D. (2003) · Earth and Planetary Science Letters · doi:10.1016/s0012-821x(03)00189-4 · Cited by 580
“to particle-reactive thiomolybdates in aqueous solution or at mineral surfaces is a prerequisite for scavenging of Mo [10,31, 35 ].”
BackgroundCalvert, S., & Pedersen, T. (2007) · Developments in marine geology · doi:10.1016/s1572-5480(07)01019-6 · Cited by 479
A re-assessment of elemental proxies for paleoredox analysis
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Trace element content of sedimentary pyrite as a new proxy for deep-time ocean–atmosphere evolution
Large, R. R., Halpin, J. A., Danyushevsky, L. V., Maslennikov, V. V., Bull, S. W., Long, J. A., Gregory, D. D., Lounejeva, E., Lyons, T. W., Sack, P. J., et al. (2014) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2013.12.020 · Cited by 545
“Molybdenum (Trend 1) is a conservative TE in the current ocean, present as the soluble MoO4= species (Helz et al., 1996).”
BackgroundSerpentinization as a source of energy at the origin of life
RUSSELL, M. J., HALL, A. J., & MARTIN, W. (2010) · Geobiology · doi:10.1111/j.1472-4669.2010.00249.x · Cited by 527
“Such molybdenum and tungsten complexes might have precipitated in clusters, some of them large, as pH dropped on meeting with acidulous ocean water percolating the hydrothermal mound (Helz et al., 1996; Erickson & Helz, 2000).”
BackgroundPaleoceanographic applications of trace-metal concentration data
Algeo, T. J., & Rowe, H. (2012) · Chemical Geology · doi:10.1016/j.chemgeo.2011.09.002 · Cited by 537
“…systems in which deepwaters were predominantly oxic or suboxic accumulate little authigenic Mo (e.g., Chaillou et al., 2008) because the concentrations of H2S required to convert molybdate anions (MoO4−2) to particle-reactive thiomolybdates (MoOxS4−x−2 , x=0 to 3) are lacking (Helz et al., 1996).”
BackgroundNatural fractionation of 238U/235U
Weyer, S., Anbar, A. D., Gerdes, A., Gordon, G. W., Algeo, T. J., & Boyle, E. A. (2008) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2007.11.012 · Cited by 509
Ross, D., & Bustin, R. M. (2008) · Chemical Geology · doi:10.1016/j.chemgeo.2008.10.027 · Cited by 498
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Siebert, C., Nägler, T. F., & Kramers, J. D. (2001) · Geochemistry Geophysics Geosystems · doi:10.1029/2000gc000124 · Cited by 456
Natural mass-dependent variations in the isotopic composition of molybdenum
Barling, J., Arnold, G. L., & Anbar, A. D. (2001) · Earth and Planetary Science Letters · doi:10.1016/s0012-821x(01)00514-3 · Cited by 460
Murphy, A. E., Sageman, B. B., Hollander, D. J., Lyons, T. W., & Brett, C. E. (2000) · Paleoceanography · doi:10.1029/1999pa000445 · Cited by 437
Lyons, T. W., Werne, J. P., Hollander, D. J., & Murray, R. W. (2003) · Chemical Geology · doi:10.1016/s0009-2541(02)00392-3 · Cited by 432
“…Canfield et al., 1996; Lyons, 1997; Raiswell and Canfield, 1996, 1998; Hurtgen et al., 1999; Wijsman et al., 2001) and Mo cycling (Francois, 1988; Emerson and Huested, 1991; Colodner et al., 1995; Crusius et al., 1996; Helz et al., 1996; Dean et al., 1999; Zheng et al., 2000; Adelson et al., 2001).”
BackgroundGeochemistry of Peruvian near-surface sediments
Böning, P., Brumsack, H., Böttcher, M. E., Schnetger, B., Kriete, C., Kallmeyer, J., & Borchers, S. L. (2004) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2004.04.027 · Cited by 430
“For OMZ sites an authigenic Mo contribution may be important (presumably as a scavenged Mo-phase, as proposed by Helz et al., 1996).”
BackgroundMolybdenum and uranium geochemistry in continental margin sediments: Paleoproxy potential
McManus, J., Berelson, W. M., Severmann, S., Poulson, R. L., Hammond, D. E., Klinkhammer, G. P., & Holm, C. (2006) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2006.06.1564 · Cited by 399
“Under these conditions, soluble Mo is converted to particle reactive thiomolybdates (e.g., MoOxS4 x 2 ; Helz et al., 1996; Erickson and Helz, 2000; Zheng et al., 2000; Vorlicek and Helz, 2002; Vorlicek et al., 2004).”
BackgroundTracking Euxinia in the Ancient Ocean: A Multiproxy Perspective and Proterozoic Case Study
Lyons, T. W., Anbar, A. D., Severmann, S., Scott, C., & Gill, B. C. (2009) · Annual Review of Earth and Planetary Sciences · doi:10.1146/annurev.earth.36.031207.124233 · Cited by 373
Metal Stable Isotopes in Paleoceanography
Anbar, A. D., & Rouxel, O. J. (2007) · Annual Review of Earth and Planetary Sciences · doi:10.1146/annurev.earth.34.031405.125029 · Cited by 373
“Mo is highly reactive in reduced settings, particularly when dissolved [H2S] > 11 μmol kg−1 and MoO42− is transformed to particle-reactive oxythiomolybdates, MoO4−xSx2− (Erickson & Helz 2000, Helz et al. 1996, Zheng et al. 2000).”
BackgroundMolybdenum in natural waters: A review of occurrence, distributions and controls
Smedley, P. L., & Kinniburgh, D. G. (2017) · Applied Geochemistry · doi:10.1016/j.apgeochem.2017.05.008 · Cited by 374
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New model for molybdenum behavior in euxinic waters
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Neubert, N., Nägler, T. F., & Böttcher, M. E. (2008) · Geology · doi:10.1130/g24959a.1 · Cited by 333
THE STABLE ISOTOPE GEOCHEMISTRY OF MOLYBDENUM
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“…in the late 1990s and 2000s when understanding of Mo geochemical behavior in modern environments improved significantly (e.g., Crusius et al. 1996; Helz et al. 1996, 2011; Morford and Emerson 1999; Erickson and Helz 2000; Barling et al. 2001; Siebert et al. 2003, 2005; Arnold et al. 2004;…”
BackgroundInfluentialMo isotope fractionation during adsorption to Fe (oxyhydr)oxides
Goldberg, T., Archer, C., Vance, D., & Poulton, S. W. (2009) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2009.08.004 · Cited by 329
McArthur, J., Algeo, T., van de Schootbrugge, B., Li, Q., & Howarth, R. (2008) · Paleoceanography · doi:10.1029/2008pa001607 · Cited by 323
“…thiomolybdate complexes (MoOxS4-x 2 ) in the presence of free H2S and subsequent sequestration in either sedimenting organic matter, sedimenting pyrite formed in the water column, or both [Helz et al., 1996; Erickson and Helz, 2000; Vorlicek and Helz, 2002; Tribovillard et al., 2004a, 2006, 2008].”
BackgroundA marine biogeochemical perspective on black shale deposition
Piper, D. Z., & Calvert, S. E. (2009) · Earth-Science Reviews · doi:10.1016/j.earscirev.2009.03.001 · Cited by 311
Kendall, B., Komiya, T., Lyons, T. W., Bates, S. M., Gordon, G. W., Romaniello, S. J., Jiang, G., Creaser, R. A., Xiao, S., McFadden, K., et al. (2015) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2015.02.025 · Cited by 286
Pi, D.-H., Liu, C.-Q., Shields-Zhou, G. A., & Jiang, S.-Y. (2013) · Precambrian Research · doi:10.1016/j.precamres.2011.07.004 · Cited by 285
“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).”
Suboxic trace metal geochemistry in the Eastern Tropical North Pacific
Nameroff, T., Balistrieri, L., & Murray, J. (2002) · Geochimica et Cosmochimica Acta · doi:10.1016/s0016-7037(01)00843-2 · Cited by 281
“Other workers have proposed that different forms of authigenic Mo can precipitate at two critical dissolved sulfide concentrations (Helz et al., 1996; Erickson and Helz, 2000; Zheng et al., in press).”
BackgroundMethodMolybdenum Stable Isotopes: Observations, Interpretations and Directions
Anbar, A. D. (2004) · Reviews in Mineralogy and Geochemistry · doi:10.2138/gsrmg.55.1.429 · Cited by 275
“The reduction of Mo(VI) to form insoluble MoS2 appears to play less of a role than might be intuitively expected, as a result of kinetic hindrances (Helz et al. 1996).”
BackgroundInfluentialMao, J., Lehmann, B., Du, A., Zhang, G., Ma, D., Wang, Y.-T., Zeng, M., & Kerrich, R. (2003) · Economic Geology · doi:10.2113/gsecongeo.97.5.1051 · Cited by 247
“We therefore favor a model of water-column scavenging similar to that of present-day sulfate-reducing environments such as the Black Sea and the Cariaco trench, where Mo-enriched sediments underlie Mo-depleted water columns (Jacobs et al., 1987; Emerson and Huested, 1991; Helz et al., 1996).”
BackgroundInfluentialScholz, F., Hensen, C., Noffke, A., Rohde, A., Liebetrau, V., & Wallmann, K. (2011) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2011.08.007 · Cited by 262
Kendall, B., Creaser, R. A., Gordon, G. W., & Anbar, A. D. (2009) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2009.02.013 · Cited by 259
Meyers, S. R., Sageman, B. B., & Hinnov, L. A. (2001) · Journal of Sedimentary Research · doi:10.1306/012401710628 · Cited by 258
Reconstructing the rise of recent coastal anoxia; molybdenum in Chesapeake Bay sediments
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Tossell, J. A. (2005) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2005.01.016 · Cited by 248
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New insights into the evolutionary history of biological nitrogen fixation
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“(Helz et al., 1996).”
Smrzka, D., Zwicker, J., Bach, W., Feng, D., Himmler, T., Chen, D., & Peckmann, J. (2019) · Facies · doi:10.1007/s10347-019-0581-4 · Cited by 260
“The dominant Mo species in oxic seawater is molybdate (MoO4), which is efficiently reduced and subsequently enriched in sediments in the presence of dissolved sulfide (Helz et al. 1996; Vorlicek et al. 2004; Helz et al. 2011).”
BackgroundMärz, C., Poulton, S. W., Beckmann, B., Küster, K., Wagner, T., & Kasten, S. (2008) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2008.04.025 · Cited by 238
Li, Y., Zhang, T., Ellis, G. S., & Shao, D. (2016) · Palaeogeography Palaeoclimatology Palaeoecology · doi:10.1016/j.palaeo.2016.11.037 · Cited by 237
Werne, J. P. (2002) · American Journal of Science · doi:10.2475/ajs.302.2.110 · Cited by 233
Authigenic molybdenum isotope signatures in marine sediments
Poulson, R. L., Siebert, C., McManus, J., & Berelson, W. M. (2006) · Geology · doi:10.1130/g22485.1 · Cited by 231
Capture of molybdenum in pyrite-forming sediments: role of ligand-induced reduction by polysulfides
Vorlicek, T. P., Kahn, M. D., Kasuya, Y., & Helz, G. R. (2004) · Geochimica et Cosmochimica Acta · doi:10.1016/s0016-7037(03)00444-7 · Cited by 233
Trace elements at the intersection of marine biological and geochemical evolution
Robbins, L. J., Lalonde, S. V., Planavsky, N. J., Partin, C. A., Reinhard, C. T., Kendall, B., Scott, C., Hardisty, D. S., Gill, B. C., Alessi, D. S., et al. (2016) · Earth-Science Reviews · doi:10.1016/j.earscirev.2016.10.013 · Cited by 227
“of particle-reactive thiomolybdates and is efficiently removed from seawater (the socalled Mo “geochemical switch”; Helz et al., 1996).”
BackgroundGeological constraints on the origin of oxygenic photosynthesis
Farquhar, J., Zerkle, A. L., & Bekker, A. (2011) · Photosynthesis Research · doi:10.1007/s11120-010-9594-0 · Cited by 223
“The most significant sinks for Mo in modern environments are in euxinic settings, where molybdate reacts with sulfide to produce particle-reactive thiomolybdates (MoOxS4-x 2-) (Helz et al. 1996; Lyons et al. 2003), and removed primarily by sorption onto organic matter.”
BackgroundMolybdenum isotope fractionation in pelagic euxinia: Evidence from the modern Black and Baltic Seas
Nägler, T. F., Neubert, N., Böttcher, M. E., Dellwig, O., & Schnetger, B. (2011) · Chemical Geology · doi:10.1016/j.chemgeo.2011.07.001 · Cited by 233
Differential Adsorption of Molybdate and Tetrathiomolybdate on Pyrite (FeS 2 )
Bostick, B. C., Fendorf, S. E., & Helz, G. R. (2002) · Environmental Science & Technology · doi:10.1021/es0257467 · Cited by 225
Geochemistry of Fine-grained Sediments and Sedimentary Rocks
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Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia
Zhang, X., Sigman, D. M., Morel, F. M. M., & Kraepiel, A. M. L. (2014) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1402976111 · Cited by 215
“Geochim Cosmochim Acta 71(22):5384–5404.”
Paleo-redox conditions during OAE 2 reflected in Demerara Rise sediment geochemistry (ODP Leg 207)
Hetzel, A., Böttcher, M. E., Wortmann, U. G., & Brumsack, H. (2008) · Palaeogeography Palaeoclimatology Palaeoecology · doi:10.1016/j.palaeo.2008.11.005 · Cited by 221
Trace-metal covariation as a guide to water-mass conditions in ancient anoxic marine environments
Algeo, T. J., & Maynard, J. B. (2008) · Geosphere · doi:10.1130/ges00174.1 · Cited by 219
“Mo is markedly enriched (to several hundred ppm) over background detrital levels (~3 ppm), providing evidence that sulfi dic conditions must have been common (Helz et al., 1996; Vorlicek and Helz, 2002).”
BackgroundInfluentialZhao, J., Jin, Z., Jin, Z., Geng, Y., Wen, X., & Yan, C. (2016) · International Journal of Coal Geology · doi:10.1016/j.coal.2016.06.015 · Cited by 214
Molybdenum isotope signatures in continental margin marine sediments
Siebert, C., McManus, J., Bice, A., Poulson, R. L., & Berelson, W. M. (2006) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2005.11.010 · Cited by 201
“solubility in ocean water, Mo is relatively insoluble under the reducing conditions that exist in sediments that line the ocean basin boundaries or marginal basins ([3–14], and others).”
BackgroundMolybdenum behavior during early diagenesis: Insights from Mo isotopes
Poulson, R. L., McManus, J., Severmann, S., & Berelson, W. M. (2009) · Geochemistry Geophysics Geosystems · doi:10.1029/2008gc002180 · Cited by 199
“Here Mo is sequestered into sediments through complexation with sulfide (Figure 1), forming thiomolybdates (MoOxS4-x 2 ) that are scavenged by organic matter or Fe sulfide phases such as pyrite [Helz et al., 1996, 2004; Zheng et al., 2000; Algeo and Lyons, 2006; Tribovillard et al., 2004, 2006].”
BackgroundChanges in marine productivity and redox conditions during the Late Ordovician Hirnantian glaciation
Zhou, L., Algeo, T. J., Shen, J., Hu, Z.-F., Gong, H., Xie, S., Huang, J., & Gao, S. (2015) · Palaeogeography Palaeoclimatology Palaeoecology · doi:10.1016/j.palaeo.2014.12.012 · Cited by 191
“However, under euxinic conditions where the H2S concentration is N10−3 M, the formation of thiomolybdates is thermodynamically favored, generating a particle-reactive form of Mo that is rapidly removed from seawater or sediment porewaters (Crusius et al., 1996; Helz et al., 1996).”
BackgroundOceanic molybdenum isotope fractionation: Diagenesis and hydrothermal ridge‐flank alteration
McManus, J., Nagler, T., Siebert, C., Wheat, C., & Hammond, D. (2002) · Geochemistry Geophysics Geosystems · doi:10.1029/2002gc000356 · Cited by 174
Schröder, S., & Grotzinger, J. P. (2007) · Journal of the Geological Society · doi:10.1144/0016-76492005-022 · Cited by 190
“Immobilization occurs when ambient HS activity exceeds threshold values, causing particle-reactive behaviour of Mo and scavenging by organic material and/or Fe-bearing particles (e.g. sulphides; Helz et al. 1996; Zheng et al. 2000).”
BackgroundXu, L., Lehmann, B., Mao, J., Nägler, T. F., Neubert, N., Böttcher, M. E., & Escher, P. (2012) · Chemical Geology · doi:10.1016/j.chemgeo.2012.05.016 · Cited by 186
“, 2009), while euxinic conditions with [H2S]aq>11 μM produce quantitative Mo removal (Helz et al., 1996) with no or very small isotopic fractionation (Siebert et al.”
BackgroundInfluentialRowe, H., Loucks, R. G., Ruppel, S. C., & Rimmer, S. M. (2008) · Chemical Geology · doi:10.1016/j.chemgeo.2008.08.006 · Cited by 185
Does pyrite act as an important host for molybdenum in modern and ancient euxinic sediments
Chappaz, A., Lyons, T., Gregory, D., Reinhard, C., Gill, B. C., Li, C., & Large, R. (2014) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2013.10.028 · Cited by 157
Zeng, S., Wang, J., Fu, X., Chen, W., Feng, X., Wang, D., Song, C., & Wang, Z. (2015) · Marine and Petroleum Geology · doi:10.1016/j.marpetgeo.2015.02.031 · Cited by 181
Wei, H., Chen, D., Wang, J., Yu, H., & Tucker, M. E. (2012) · Palaeogeography Palaeoclimatology Palaeoecology · doi:10.1016/j.palaeo.2012.07.005 · Cited by 180
“10D), suggesting a more direct coupling between organic matter and Mo burial through reactions between Mo-bearing dissolved species and organic matter (Helz et al., 1996).”
BackgroundRiquier, L., Tribovillard, N., Averbuch, O., Devleeschouwer, X., & Riboulleau, A. (2006) · Chemical Geology · doi:10.1016/j.chemgeo.2006.02.021 · Cited by 178
Scholz, F., McManus, J., & Sommer, S. (2013) · Chemical Geology · doi:10.1016/j.chemgeo.2013.07.006 · Cited by 181
“This observation is consistent with the model of Mo scavenging 364 from sulfidic solutions after transformation of MoO4 2- to MoS4 2- (Helz et al., 1996; Erickson and Helz, 365 2000).”
BackgroundResultInfluentialMolybdenum isotope variations in magmatic rocks
Willbold, M., & Elliott, T. R. (2016) · Chemical Geology · doi:10.1016/j.chemgeo.2016.12.011 · Cited by 178
Evidence for a redox stratified Cryogenian marine basin, Datangpo Formation, South China
Li, C., Love, G. D., Lyons, T. W., Scott, C. T., Feng, L., Huang, J., Chang, H., Zhang, Q., & Chu, X. (2012) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2012.03.018 · Cited by 173
A late methanogen origin for molybdenum-dependent nitrogenase
BOYD, E. S., ANBAR, A. D., MILLER, S., HAMILTON, T. L., LAVIN, M., & PETERS, J. W. (2011) · Geobiology · doi:10.1111/j.1472-4669.2011.00278.x · Cited by 161
“It is likely that this proliferation occurred during the earliest stages of environmental oxygenation, before the oceans became thoroughly oxygenated and where Mo was at least episodically available [e.g. anoxic, but non-sulphidic conditions (Helz et al., 1996)].”
BackgroundInfluentialNoordmann, J., Weyer, S., Montoya-Pino, C., Dellwig, O., Neubert, N., Eckert, S., Paetzel, M., & Böttcher, M. (2015) · Chemical Geology · doi:10.1016/j.chemgeo.2014.12.012 · Cited by 164
Algeo, T., Lyons, T., Blakey, R., & Over, D. (2007) · Palaeogeography Palaeoclimatology Palaeoecology · doi:10.1016/j.palaeo.2007.02.035 · Cited by 165
“Mo uptake occurs primarily at or below the sediment-water interface via downward diffusion of MoO4 2−, even in euxinic environments (Helz et al., 1996; Zheng et al., 2000; Algeo and Maynard, 2004).”
BackgroundInfluentialSubarctic Pacific evidence for a glacial deepening of the oceanic respired carbon pool
Jaccard, S. L., Galbraith, E. D., Sigman, D. M., Haug, G. H., François, R., Pedersen, T. F., Dulski, P., & Thierstein, H. R. (2008) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2008.10.017 · Cited by 171
Molybdenum isotope evidence for mild environmental oxygenation before the Great Oxidation Event
Duan, Y., Anbar, A. D., Arnold, G. L., Lyons, T. W., Gordon, G. W., & Kendall, B. (2010) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2010.08.035 · Cited by 172
Kashiwabara, T., Takahashi, Y., Tanimizu, M., & Usui, A. (2011) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2011.07.022 · Cited by 178
Biological nitrogen fixation by alternative nitrogenases in terrestrial ecosystems: a review
Bellenger, J., Darnajoux, R., Zhang, X., & Kraepiel, A. M. L. (2020) · Biogeochemistry · doi:10.1007/s10533-020-00666-7 · Cited by 184
“However, under sulfidic conditions ([ 11 lM H2S(aq)), such as those sometimes found in marine and coastal sediments, Mo can react with sulfides to form thiomolybdates (MoOxS(4-x) 2-, with 1\ x\ 4) (Erickson and Helz 2000; Helz et al. 1996).”
BackgroundBrown, G. E., & Sturchio, N. C. (2002) · Reviews in Mineralogy and Geochemistry · doi:10.2138/gsrmg.49.1.1 · Cited by 174
Dahl, T. W., Anbar, A. D., Gordon, G. W., Rosing, M. T., Frei, R., & Canfield, D. E. (2009) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2009.09.018 · Cited by 174
Schoepfer, V. A., & Burton, E. D. (2021) · Earth-Science Reviews · doi:10.1016/j.earscirev.2021.103811 · Cited by 170
Cycling of trace metals (Mn, Fe, Mo, U, V, Cr) in deep pore waters of intertidal flat sediments
Beck, M., Dellwig, O., Schnetger, B., & Brumsack, H. (2008) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2008.04.013 · Cited by 162
The deep, hot biosphere: Twenty-five years of retrospection
Colman, D. R., Poudel, S., Stamps, B. W., Boyd, E. S., & Spear, J. R. (2017) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1701266114 · Cited by 167
A pathway for biological methane production using bacterial iron-only nitrogenase
Zheng, Y., Harris, D. F., Yu, Z., Fu, Y., Poudel, S., Ledbetter, R. N., Fixen, K. R., Yang, Z., Boyd, E. S., Lidstrom, M. E., et al. (2018) · Nature Microbiology · doi:10.1038/s41564-017-0091-5 · Cited by 165
Czaja, A. D., Johnson, C. M., Roden, E. E., Beard, B. L., Voegelin, A. R., Nägler, T. F., Beukes, N. J., & Wille, M. (2012) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2012.03.007 · Cited by 162
“It has been suggested that below a critical H2Saq concentration of 11 lM, this scavenging is incomplete, which leads to fractionation of the residual Mo (Helz et al., 1996; Erickson and Helz, 2000; Neubert et al., 2008a; Nägler et al., 2011).”
BackgroundXu, N., Christodoulatos, C., & Braida, W. (2006) · Chemosphere · doi:10.1016/j.chemosphere.2005.06.025 · Cited by 175
“, DO < 1 mg l ) and in the presence of dissolved hydrogen sulfide, MoO 4 can be sulfurized to MoS 4 (Luther et al., 1986; Helz et al., 1996; Erickson and Helz, 2000).”
Background
Metadata
- 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)
- Venue
- Geochimica et Cosmochimica Acta
- Publisher
- Elsevier BV
- Published
- 1996-10
- Volume
- 60
- Issue
- 19
- Pages
- 3631-3642
- ISSN
- 0016-7037 (ISSN-L)
- 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
- 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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