Petrology and Stable Isotope (S, C, O) Studies of Selected Sediment-Hosted Basemetal Ore Deposits in the Proterozoic Aravalli-Delhi Fold Belt, Rajasthan

Authors

  • Fareeduddin
     Geological Survey of India, PPOD Division, SR, Bangalore - 560 082
  • B. R. Venkatesh
     Geological Survey of India, Marine Wing, Mangalore
  • R. Hanumantha
     Geological Survey of India, PPOD Division, SR, Bangalore - 560 082
  • P. R. Golani
     Geological Survey of India, Operations Rajasthan, Jhalana Dungri, Jaipur 302004
  • B. B. Sharma
     Geological Survey of India, Operations Rajasthan, Jhalana Dungri, Jaipur 302004
  • S. Neogi
     Geological Survey of India, PPOD Division, SR, Bangalore - 560 082

Abstract

An integrated mineralogical-geochemical and stable isotopic study of Pb-Zn deposits located at Kayar-Ghugra (Zn-Pb ± Ag), Rampura-Agucha (Zn-Pb, Ag), Dariba-Bethumni (Zn-Pb) and Zawar (Pb-Zn ± Cd, Ag) in Rajasthan is presented in this paper.

The Kayar Zn-Pb deposit hosted by (i) phlogopite-tremolite bearing dolomitic carbonates and (ii) scapolite bearing calc-silicates, both belonging to Mesoproterozoic Delhi Supergroup exhibit distinctly different δ13C signatures being close to zero permil for the former reflecting deposition in pristine marine environment and much depleted isotopic values for the latter possibly related to post-depositional alterations.

The Zn-Pb sulphides of Agucha, hosted in amphibolite facies to lower granulite facies metasedimentary units belonging to the Bhilwara Supergroup have δ34S values that indicate (i) H2S dominated regime characterized by low fO2, low pH, wherein the δ34S(fluid) responsible for mineralisation approximates the δ34S(sulphide); (ii) the role of seawater in the generation of Agucha ores; (iii) the process of a low temperature oxidation of sulphides in the hydrothermal fluids resulting in the formation of sulphate, by the interaction of ground water; (iv) isotopic disequilibrium in sulphate-sulphide pairs that explain oxidation of H2S by acid groundwater (low pH) and deposition of sulphides at higher temperatures and (v) equilibrium isotopic fractionation of the coexisting sulphides reflecting in a higher concentration of H2S (>10-5m) in relation to the total metal content in the hydrothermal fluid (mH2S ≥ mSmetals). Accordingly the concentration of sulphide-sulphate in the hydrothermal solution responsible for the mineralization in Agucha exceeds that of total metals.

The sulphides of Bethumni-Rajpura-Dariba belt hosted in low to medium grade siliceous carbonates has a marginally positive (mean of +1.5"°) δ13C values. At Sindeswar, broad and widely scattered δ34S values indicate a polymodal sedimentary source of sulphur that recrystallised at rather low temperature of <50°C possibly during the processes of low temperature bacterial reduction. The C- and O-isotopic studies on mineralized and non-mineralized carbonates reveal (i) normal marine depositional signatures for non-mineralized carbonates with possible minor influence of biogenic carbon during deposition and (ii) ore zone carbonates exhibit depleted δ13C values presumably due either to the deeper mantle-like source of carbonates or due to post-depositional equilibration with isotopically light meteoric waters.

In Zawar belt, sulphides hosted in dolomitic carbonate indicated (i) near identical δ34S values of disseminated galena and pyrite veinlets and depleted values of -4.6 "°for late veins of massive galena of Zawar Mala (ii) pyrite-pyrrhotite veinlet having enhanced δ34S values when compared to the PbS-ZnS veinlet in Morchia-Magra, Balaria and Baroi mines. The carbon isotopic values for carbonates of Zawar Mala mine area are mostly depleted and those from Balaria and Baroi mines exhibit values of 13C close to zero. The generally depleted δ18O clustering around -15 "° tally well with the reported Paleoproterozoic carbonates and is attributed to the post-depositional equilibration reactions with isotopically light meteoric waters.

It is summarized that the host carbonates for Zn-Pb deposits occurring in different tectono-stratigraphic units in Rajasthan have largely similar but bimodal distribution of δ18O and δ13C isotopic ratios that suggest normal marine values and much depleted values. Whereas the former seems to be in general agreement with the nature of distribution in the Palaeoproterozoic carbonates the latter is attributed to (i) depositional conditions of the basins that includes absence or presence of biogenic activity (ii) isotopic re-equilibration under different metamorphic recrystallization events and/or (iii) interaction with isotopically lighter meteoric waters. In contrast to the uniformity in the C and O distribution pattern, the S-isotopic distribution in the deposits of Rampura-Agucha, Bethumni-Rajpura-Darbia and Zawar mine areas show marked variations reflecting complex deposit-specific ore-forming processes in the said deposits.

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Issue

Volume 83, Issue 2, February 2014

Section

Research Articles

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Published

2014-02-12

How to Cite

Fareeduddin, ., Venkatesh, B. R., Hanumantha, R., Golani, P. R., Sharma, B. B., & Neogi, S. (2014). Petrology and Stable Isotope (S, C, O) Studies of Selected Sediment-Hosted Basemetal Ore Deposits in the Proterozoic Aravalli-Delhi Fold Belt, Rajasthan. Journal of Geological Society of India, 83(2), 119–141. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/56858

References

BASU, P.K. (1976) Geology of stratabound native sulphur deposits in Zawar lead-zinc belt, Udaipur district, Rajasthan: Indian Minerals, v.30 (2), pp.30-35.

BHATNAGAR, S.N. and MATHUR,S.B. (1989) Geology of lead-zinc resources. Hindzin Tech., v.1-2, pp.15-28.

BURDETT, J.W., GROTZINGER, J.P. and ARTHUR, M.A. (1990) Did major changes in the stable-isotope composition of Proterozoic sea water occur? Geology, v.18, pp.227-230.

CHOUDHURY, A.K., GOPALAN, K. and SASTRY, C.A. (1984) Present status of the geochronology of the Precambrian rocks of Rajasthan. Tectonophysics, v.105, pp.131-140.

CZAMANSKE G.K. and RYE, D.M. (1974). Experimentally determined sulfur fractionations between sphalerite and galena in the temperature range 600°C to 275°C. Econ. Geol., v.69, pp.17-25.

DEB, M. (1990) Isotopic constitution of sulphur in the conformable base metal sulphide deposits in the Proterozoic Aravalli Delhi Orogenic Belt, NW India. In: S.M. Naqvi (Ed.), Developments in Precambrian Geology, v.8. Elsevier, Amsterdam, pp.631-651.

DEB, M. (2001) Metallogeny in the Aravalli-Delhi orogenic belt, Northwestern India. Geol. Surv. India, Spec. Publ. No.55, pp.333-350.

DEB, M. and SEHGAL, U. (1997) Petrology, geothermobarometry and C-O-H-S fluid compositions in the environs of Rampura-Agucha Zn-(Pb) ore deposits, Bhilwara District, Rajasthan. Proc. Indian Acad. Sci (Earth Planet. Sci), v.106, pp.343-356.

DEB, M. and PAL, T. (2004) Geology and genesis of the base metal sulphide deposits in the Dariba-Rajpura-Bethumni belt, Raajstha, India, in the light of basin evolution. In: M. Deb and W. D. Goodfellow (Eds.), Sediment-hosted lead-zinc sulphide deposits. Narosa Publishing House, New Delhi, India. Pp.305-327.

DEB, M. and GOODEFELLOW, W.D. (Eds.) (2004) Sediment-hosted lead-zinc sulphide deposits: attributes and models of some major deposits in India, Australia and Canada: Narosa Publishing House, New Delhi.

DEB, M. and THORPE, R.I. (2004) Geochronological constraints in the Precambrian Geology of Rajasthan and their metallogenic implications. In: M. Deb and R.I. Thorpe (Eds.), "Sediment-hosted lead-zinc sulphides with emphasis on the deposits in the northwestern Indian Shield". Narosa Publishing House, New Delhi, pp.246-263.

DEB, M., THORPE, R.I., CUMMING, G.L. and WAGNER, P.A. (1989) Age, source and stratigraphic implications of lead isotope data for conformable sediment-hosted base metal deposits in the Proterozoic Aravalli-Delhi orogenic belt, northwestern India. Precambrian Res., v.43, pp.1-22.

DEER, R.A., HOWIE, W.A. and ZUSSMAN, J. (1967) Rock forming minerals. Concise Volume. Longmann, 592p.

FAIRCHILD, I.J, I.J., MARSHALL, JH.D. and BERTRAND-SAFATI, J. (1990) Stratigraphic shifts in carbon isotopes from Proterozoic stromatolitic carbonates (Mauritina): Influence of primary mineralogy and diagenesis. Amer. Jour. Sci., v.290-A, pp.46-79.

FAREEDUDDIN and KRONER, A. (1998) Single zircon age constraints on the evolution of the Rajasthan granulites. In: B.S. Paliwal (Ed.), "Indian Precambrians". Sci. Publ. New Delhi.

FAREEDUDDIN, REDDY, M.S. and BOSE, U. (1995) Reappraisal of the Delhi stratigraphy in the Ajmer-Sambhar sector, north-central Rajasthan. Jour. Geol. Soc. India, v.45, pp.667-679.

GANDHI, S. M., PALIWAL, H.V. and BHATNAGAR, S.N. (1984) Geology and ore reserve estimates of Rampura-Agucha lead zinc deposit, Bhilwara District. Jour. Geol. Soc. India, v.25, pp.689-705.

GANDHI, S.M. (2003) Rampura-Agucha zinc-lead deposit. Mem. Geol. Soc. India, no.55, 154p.

GSI (2004) S-isotopic analysis of Sindeswar-Kurd Extension Block. Geol. Surv. India, Unpubld. Report.

GUPTA, S.N., ARORA, Y.K., MATHUR, R.K., IQBALUDDIN, PRASAD, B., SAHAI, T.N. and SHARMA, B. (1997) The Precambrian Geology of the Aravalli Region, Southern Rajasthan and Northwestern Gujarat. Mem. Geol. Surv. India, v.123, 262p.

HALDER, S.K. (2004) Grade and tonnage relationship in sedimenthosted lead-zinc sulphide deposits of Rajasthan, India. In: M. Deb and W.D. Goodefellow (Eds.), Sediment-hosted lead-zinc sulphide deposits: attributes and models of some major deposits in India, Australia and Canada: Narosa Publishing House, New Delhi, pp.264-272.

HERON, A.M. (1953) The Geology of Central Rajputana. Mem. Geol. Surv. India, v.79, pp.1-389.

HOLLER, W. and GANDHI, S.M. (1995) Silver-bearing sulfosalts from the metamorphosed Rampura-Agucha Zn-Pb–(Ag) deposit, Rajasthan, India. Canadian Mineral., v.33, pp.1047-1057.

KAUFMANN, A.J., KNOLL, A.H., HAYES, J.M. and AWRAMIK, S.M. (1992) Biostratigraphic and chemostratigraphic correlation of Neoproterozoic sedimentary successions: Upper Indir Group, northwestern Canada, as a test case. Geology, v.20, pp.181-185.

KAJIWARA, Y. and Krouse, H.R. (1971) Sulfur Isotope partitioning in Metallic sulphide systems. Can. Jour. Earth. Sci., v.8, pp.1397-1408.

MCCREA, J.M. (1950) On the isotope chemistry of carbonates and paleotemperature scale. Jour. Phys. Chem., v.18, pp.849-857.

MISHRA, B. (2000) Evolution of the Rajpura-Dariba polymetallic sulphide deposit: constraints from sulphide-sulfosalt phase equilibria and fluid inclusion studies. In: M. Deb (Ed.), Crustal Evolution and Metallogeny in the Northwestern Indian Shield. Narosa Publication, New Delhi, pp. 347-370.

MISHRA, B., UPADHYAY, D. and BERNHARDT, HEINZ-JUERGEn (2006) Metamorphism of the host and associated rocks at the Rajpura-Dariba massive sulphide deposit, Northwestern India. Jour. Asian Earth Sci., v.26, pp.21-37.

NAHA, K., MOOKHERJEE, A. and BASU SANYAL, K. (1987) Deformation structures in the Rajpura-Darbia area, Rajasthan, Western India and their significance. In "Crustal evolution and Orogeny (ed) S.P.H. Sychanthavong, Oxford and IBH Publ. Co., New Delhi. 275-291.

NAHA, K. and HALYBURTON, R.V. (1974) Early Precambrian stratigraphy of Central and Southern Rajasthan, India. Precambrian Res., v.1, pp.55-73.

Nielsen, H. (1979) S-isotopes. In: E. Jager and J.K. Hunziker (Eds.), Lectures in Isotope Geology. Springer-Verlag, Heielberg. pp.283-329.

OHMOTO, H. and RYE, R.O. (1979) Isotopes of S and C In: H.L. Berne (Ed.), Geochemistry of Hydrothermal ore deposits. Wiley, New York, pp.509-567.

OHMOTO H. (1972) Stable isotope geochemistry of ore deposits. In: J.W, Valley, H.P. Taylor, Jr., J.R. O'Neil (Eds.) Stable Isotopes in High Temperature Geological Processes, Reviews in Mineralogy, v.16, pp.491-559.

RANAWAT, P.S. and SHARMA, N.K. (1990) Petrology and geochemistry of the Precambrian Pb-Zn deposit Rampura-Agucha, India. In: P.G. Spry and L.T. Bryndxia (Eds.), Regional Metamorphism of Ore Deposits, Verlag, pp.197-227.

ROY, A.B. (1988) Stratigraphic and tectonic framework of the Aravalli Mountain Range. In: A.B. Roy (Ed.), Precambrian of Aravalli Mountain Range, Rajasthan, India. Mem. Geol. Soc. India, no.7, pp.3-31.

ROY, A.B. and KRONER, A. (1996) Single zircon evaporation ages constraining the growth of the Arcaean Aravalli craton, northwestern Indian shield. Geol. Mag., v.133, pp.333-342.

SACHAN, H.K. (1993) Early-replacement dolomitization and deep burial modfication and stabilization: a case study from the Late Precambrian of theZawar area, Rajasthan (India): Carbonates and evaporates, v.8, pp.191-198.

SAHAI, T.N., GUPTA, S.N. and MATHUR, R.K. (1997) Mineral Resources. In: S.N. Gupta et al. (Eds.), The Precambrian geology of the Aravalli region, Southern Rajasthan and northeastern Gujarat. Mem. Geol. Surv. India, v.123, pp.171-199.

SARKAR, S.C and BANERJEE, D. (2004) Carbonate-hosted lead-zinc deposits of Zawar, Rajasthan, in the context of the world scenario. In: M. Deb and W.D. Goodfellow (Eds.) Sediment-hosted lead-zinc sulphide deposits. Narosa Publishing House, New Delhi, India, pp.328-349.

SHIELD and VEIZER (2002) Precambrian marine carbonate isotope database: version 1.1, Geochemistry, Geophysics, Geosystems, v.3, No.6. 10.1029/2001GC000266.

SINHA-ROY, S. (2001) Plate tectonic controlled Precambrian metallotects in Rajasthan: Their role in predictive metallogeny. Geol. Surv. India, Spec. Publ. No. 72, pp.11-34.

SINHA-ROY, S. (1988) Proterozoic Wilson Cycles in Rajasthan. In: A.B. Roy (Ed.), Precambrians of the Aravalli Mountain Range. Mem. Geol. Soc. India, no.7, pp.95-108.

SISODIA,C.P., CHATTOPADHYAY, A.K, SURESH CHANDER and MALHOTRA, A.K. (2002) Airborne Geophysical Surveys in the exploration for basemetal and gold - Case studies from Rajasthan. Geol. Surv. India, Spec. Publ. No.75, pp.29-36.

SUGDEN,T., DEB, M. and WINDLEY B.F. (1990) Tectonic setting of mineralisation in the Proterozoic Aravalli-Delhi orogenic belt, northwestern India. In: S.M. Naqvi (Ed.), Precambrian Continental Crust and its Economic Resources. Developments of Precambrian Geology, Elsevier, Amsterdam, pp.367-390.