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Redox Structure of Vindhyan Hydrosphere:Clues from Total Organic Carbon, Transition Metal (Mo, Cr) Concentrations and Stable Isotope (δ13 C) Chemistry


Affiliations
1 Birbal Sahni Institute of Palaeosciences, Lucknow 226 007, India
2 Department of Geology, University of Delhi, Delhi 110 007, India
3 Department of Geological Sciences, Jadavpur University, Kolkata 700 032, India
 

Trace metal concentration in black shales can hold valuable information regarding ancient deep-ocean redox state. The size of marine reservoir of redoxsensitive elements (particularly molybdenum and chromium) is principally controlled by the extent of anoxicity in marine conditions following the onset of oxidative weathering post Great Oxygenation Event (~2.5-2.3 Ga). Hence, it is considered that coupled analysis involving redox-sensitive element/s and primary organic productivity (total organic carbon) may provide a clue for redox behaviour of ancient deep ocean. Here, we use the redox behaviour of Mo and total organic carbon values of Vindhyan shales to show that the Vindhyan hydrosphere although initiated as a stratified sea with anoxic and sulphidic deep water as exemplified by the geochemical character of the Arangi Shale, the extent and veracity of anoxicity and euxinicity was never pervasive. It further suggests that the Vindhyan hydrosphere developed euxinic deep water only during deposition of Arangi, Rampur and Bijaygarh black shale and was anoxic but certainly not euxinic during Koldaha and Rewa sedimentation. The low concentration of Mo and Cr, in general, in argillaceous intervals suggests that the Vindhyan Sea behaved as a moderate Mo and depleted Cr reservoir. The consistent low concentration of Cr within the Vindhyan shales also suggests restriction in the availability of Cr in the water column in the absence of any significant detrital supply of Cr at very low atmospheric oxygen level (<0.1% PAL; present atmospheric level).

Keywords

Hydrosphere, Primary Organic Productivity, Total Organic Carbon, Transition Metals, Stable Isotope Chemistry.
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  • Canfield, D. E., A new model for Proterozoic ocean chemistry. Nature, 1998, 396(6710), 450-453.

  • Poulton, S. W., Fralick, P. W. and Canfield, D. E., Spatial variability in oceanic redox structure 1.8 billion years ago. Nature Geosci., 2010, 3(7), 486-490.

  • Scott, C., Lyons, T. W., Bekker, A., Shen Y., Poulton, S. W., Chu, X. and Anbar, A. D., Tracing the stepwise oxygenation of the Proterozoic ocean. Nature, 2008, 452(7186), 456-460.

  • Kaczmarek, M.-A., Reddy, S. M., Nutman, A. P., Friend, C. R. L. and Bennett, V. C., Earth’s oldest mantle fabrics indicate Eoarchaean subduction. Nature Commun., 2016, 7, 10665.

  • Karhu, J. A. and Holland, H. D., Carbon isotopes and the rise of atmospheric oxygen. Geology, 1996, 24, 867-870.

  • Bose, P. K., Banerjee, S. and Sarkar, S., Slope-controlled seismic deformation and tectonic framework of deposition: Koldaha Shale, India. Tectonophysics, 1997, 269, 151-169.

  • Bose, P. K., Sarkar, S., Chakraborty, S. and Banerjee, S., Overview of the Meso- to Neoproterozoic evolution of the Vindhyan basin, central India. Sediment. Geol., 2001, 141(2), 395-419.

  • Chakraborty, P. P., Outcrop signatures of relative sea level fall on a siliciclastic shelf: Examples from the Rewa Group of Proterozoic Vindhyan basin. J. Earth. Syst. Sci., 2006, 115(1), 23-36.

  • Sarkar, S., Banerjee, S., Chakraborty, S. and Bose, P. K., Shelf storm flow dynamics: insight from the Mesoproterozoic Rampur Shale, central India. Sediment. Geol., 2002, 147, 89-104.

  • Chakraborty, P. P., Slides, soft-sediment deformations, and mass flows from Proterozoic Lakheri Limestone Formation, Vindhyan Supergroup, central India, and their implications towards basin tectonics. Facies, 2011, 57, 331-349.

  • Seilacher, A., Bose, P. K. and Pfluger, F., Triploblastic animals more than 1.0 billion years ago: trace fossil evidence from India. Science, 1998, 282, 80-83.

  • Rasmussen, B., Bose, P. K., Sarkar, S., Banerjee, S., Fletcher, I. R. and McNaughton, N. J., 1.6 Ga U-Pb zircon age for the Chorhat Sandstone, Lower Vindhyan, India: possible implications for the early evolution of animals. Geology, 2002, 20, 103-106.

  • Ray, J. S., Martin, M. W., Veizer, J. and Bowring, S. A., U-Pb zircon dating and Sr isotope systematics of the Vindhyan Supergroup, India. Geology, 2002, 30(2), 131-134.

  • Chakraborty, P. P., Banerjee, S., Das, N. G., Sarkar, S. and Bose, P. K., Volcaniclastics and their sedimentological bearing in Proterozoic Kaimur and Rewa Groups in central India. In Recent Advances in Vindhyan Geology (ed. Bhattacharya, A.), Memoir Geological Society of India, Bangalore, 1996, vol. 36, pp. 59-76.

  • Banerjee, S., Dutta, S., Paikaray, S. and Mann, U., Stratigraphy, sedimentology and bulk organic geochemistry of black shales from the Proterozoic Vindhyan Supergroup (central India). J. Earth. Syst. Sci., 2006, 115, 37-48.

  • Sarkar, S., Banerjee, S., Samanta, P., Chakraborty, N., Mukhopadhyay, S., Chakraborty, P. and Singh, A. K., Microbial mat records in siliciclastic rocks: examples from four Indian Proterozoic basins and their modern equivalents in Gulf of Cambay. J. Asian Earth. Sci., 2014, 91, 362-377.

  • Eriksson, P. G. et al., Precambrian clastic sedimentation systems. Sediment. Geol., 1998, 120, 5-53.

  • Reddy, S. M. and Evans, D. A. D., Palaeoproterozoic supercontinents and global evolution: correlations from core to atmosphere. Geol. Soc. London, Spec. Publ., 2009, 323(1), 1-26.

  • Canfield, D. E., The evolution of the earth surface sulfur reservoir. Am. J. Sci., 2004, 304, 839-861.

  • Canfield, D. E., Poulton, S. W. and Narbonne, G. M., LateNeoproterozoic deep ocean oxygenation and the rise of animal life. Science, 2007, 315, 92-94.

  • Canfield, D. E., Poulton, S. W., Knoll, A. H., Narbonne, G. M., Ross, G., Goldberg, T. and Strauss, H., Ferruginous conditions dominated later Neoproterozoic deep water chemistry. Science, 2008, 321, 949-952.

  • Johnston, D. T., Poulton, S. W., Fralick, P. W., Wing, B. A., Canfield, D. E. and Farquhar, J., Evolution of the oceanic sulfur cycle at the end of the Paleoproterozoic. Geochim. Cosmochim. Acta, 2006, 70(23), 5723-5739.

  • Canfield, D. E. and Raiswell, R., The evolution of the sulfur cycle. Am. J. Sci., 1999, 299(7-9), 697-723.

  • Sarkar, A., Chakraborty, P. P., Mishra, B., Bera, M. K., Sanyal, P. and Paul, S., Mesoproterozoic sulphidic ocean, delayed oxygenation and evolution of early life: sulphur isotope clues from Indian Proterozoic basins. Geol. Mag., 2010, 147, 206-218.

  • Bertine, K. K. and Turekian, K. K., Molybdenum in marine deposits. Geochim. Cosmochim. Acta, 1973, 37, 1415-1434.

  • Helz, G. R., Miller, C. V., Charnock, J. M., Mosselmans, J. F. W., Pattrick, R. A. D., Garner, C. D. and Vaughan, D. J., Mechanism of molybdenum removal from the sea and its concentration in black shales: EXAFS evidence. Geochim. Cosmochim. Acta, 1996, 60, 3631-3642.

  • Fendorf, S. E. and Li, G., Kinetics of chromate reduction by ferrous iron. Environ. Sci. Technol., 1996, 30(5), 1614-1617.

  • Graham, A. M. and Bouwer, E. J., Rates of hexavalent chromium reduction in anoxic estuarine sediments: pH effects and the role of acid volatile sulfides. Environ. Sci. Technol., 2010, 44(1), 136-142.

  • Malone, S. J. et al., Paleomagnetism and detrital zircon geochronology of the upper Vindhyan sequence, Son Valley and Rajasthan, India: a ca. 1000 Ma closure age for the Purana basins? Precambrian Res., 2008, 164, 137-159.

  • Kump, L. R. and Arthur, M. A., Interpreting carbon-isotope excursions: carbonates and organic matter. Chem. Geol., 1999, 161, 181-198.

  • Reinhard, C. T. et al., Proterozoic ocean redox and biogeochemical stasis. Proc. Natl. Acad. Sci. USA, 2013, 110, 5357-5362.

  • Algeo, T. J. and Lyons, T. W., Mo-total organic carbon covariation in modern anoxic marine environments: implications for analysis of paleoredox and paleohydrographic conditions. Paleoceanography, 2006, 21, 1016.

  • Raiswell, R., Buckley, R., Berner, R. A. and Anderson, T. F., Degree of pyritization of iron as a paleoenvironmental indicator of bottom-water oxygenation. J. Sediment. Petrol., 1988, 58, 812-819.

  • Zhang, S. et al., Sufficient oxygen for animal respiration 1,400 million years ago. Proc. Natl. Acad. Sci. USA, 2016, 113, 1731-1736.

  • Cole, D. B. et al., A shale-hosted Cr isotope record of low atmospheric oxygen during the Proterozoic. Geology, 2016, 44(7), 555-558.

  • Deines, P., The isotopic composition of reduced organic carbon. In Handbook of Environmental Isotope Geochemistry (eds Fritz, P. and Fontes, J. C.), Elsevier, New York, 1980, vol. 1A, pp. 329-406.

  • Buchardt, B. and Fritz, P., Environmental isotopes as environmental and climatological indicators. In Handbook of Environmental Isotope Geochemistry (eds Fritz, P. and Fontes, J. C.), Elsevier, New York, 1980, vol. 1A, pp. 473-504.

  • Clayton, J. L. and Swetland, P. J., Subaerial weathering of sedimentary organic matter. Geochim. Cosmochim. Acta, 1978, 42, 305-312.

  • Talbot, M. R. and Livingstone, D. A., Hydrogen index and carbon isotopes of lacustrine organic matter as lake level indicators. Palaeogeogr. Palaeoclimatol. Palaeoecol., 1989, 70, 121-137.

  • Krishnan, M. S. and Swaminath, J., The Great Vindhyan Basin of northern India. J. Geol. Soc. India, 1959, 1, 10-36.

  • Taylor, S. R. and McLennan, S. M., The geochemical evolution of the continental crust. Rev. Geophys., 1995, 33, 241-265.


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  • Redox Structure of Vindhyan Hydrosphere:Clues from Total Organic Carbon, Transition Metal (Mo, Cr) Concentrations and Stable Isotope (δ13 C) Chemistry

Abstract Views: 335  |  PDF Views: 128

Authors

Arvind K. Singh
Birbal Sahni Institute of Palaeosciences, Lucknow 226 007, India
Partha Pratim Chakraborty
Department of Geology, University of Delhi, Delhi 110 007, India
Subir Sarkar
Department of Geological Sciences, Jadavpur University, Kolkata 700 032, India

Abstract


Trace metal concentration in black shales can hold valuable information regarding ancient deep-ocean redox state. The size of marine reservoir of redoxsensitive elements (particularly molybdenum and chromium) is principally controlled by the extent of anoxicity in marine conditions following the onset of oxidative weathering post Great Oxygenation Event (~2.5-2.3 Ga). Hence, it is considered that coupled analysis involving redox-sensitive element/s and primary organic productivity (total organic carbon) may provide a clue for redox behaviour of ancient deep ocean. Here, we use the redox behaviour of Mo and total organic carbon values of Vindhyan shales to show that the Vindhyan hydrosphere although initiated as a stratified sea with anoxic and sulphidic deep water as exemplified by the geochemical character of the Arangi Shale, the extent and veracity of anoxicity and euxinicity was never pervasive. It further suggests that the Vindhyan hydrosphere developed euxinic deep water only during deposition of Arangi, Rampur and Bijaygarh black shale and was anoxic but certainly not euxinic during Koldaha and Rewa sedimentation. The low concentration of Mo and Cr, in general, in argillaceous intervals suggests that the Vindhyan Sea behaved as a moderate Mo and depleted Cr reservoir. The consistent low concentration of Cr within the Vindhyan shales also suggests restriction in the availability of Cr in the water column in the absence of any significant detrital supply of Cr at very low atmospheric oxygen level (<0.1% PAL; present atmospheric level).

Keywords


Hydrosphere, Primary Organic Productivity, Total Organic Carbon, Transition Metals, Stable Isotope Chemistry.

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DOI: https://doi.org/10.18520/cs%2Fv115%2Fi7%2F1334-1341