Abstract
The Sargipali sulphide deposit, hosted by a sequence of metasediments of the Precambrian Gangpur Series, represents the stratiform and stratabound Pb-Cu mineralization. Lead-isotope analyses obtained from six galena samples of different forms and stratigraphical levels, yielded a model Pb age of 1665 Ma, which predates the episodes of deformation and metamorphism (∼ 850 Ma) as well as syn-to late-tectonic magmatism. The model Pb age, on the contrary, shows a relationship to the closing phase of the Gangpur sedimentation (1700 Ma) in a shallow-water marine environment. The notable paucity of the interlayered volcanic rock in the deposit and its Pb-rich nature possibly point to its being the sedimentary exhalative (SEDEX) type. Documentary evidence for the Pb component from the geological environment of the “upper continental crust” is revealed by an exceptionally high μ(= 238U/204Pb) and the slightly above average W(= 232Th/238U) values. These indicate that the source rock was initially rich in U-Th-Pb concentration. For the Sargipali ore Pb, the parent is assumed to be late Archean-lower Proterozoic soda granite.
Similar content being viewed by others
References
Appel, P.W.U., Moorbath, S., Taylor, P.N.: Least radiogenic terrestrial lead from Isua, West Greenland. Nature 272:524–526 (1978)
Banerjee, P.K.: Revision of the stratigraphy, structure and metamorphic history of the Gangpur Series, Sundargarh district, Orissa. Rec. Geol. Surv. India 95:327–347 (1968)
Doe, B.R., Stacey, J.S.: The application of lead isotopes to the problems of ore genesis and ore prospect evaluation: A review, Econ. Geol. 69:757–776 (1974)
Fletcher, I.R., Farquhar, R.M.: Lead isotopic compositions of Balmat ores and their genetic implications. Econ. Geol. 77:472 (1982)
Gale, G.H.: Proterozoic exhalative massive sulphide deposits. Geol. Soc. Am. Memoir 161:200 (1983)
Govett, G.J.S.: Regional scale exploration for stratiform deposits of volcanic and sedimentary association. In: Govett., G. J. S. (ed) Hand Book of Exploration Geochemistry. Vol. 3, Elsevier: 178 (1983)
Gulson, B.L.: Shale-hosted lead-zinc deposits in Northern Australia: Lead isotope variations, Econ. Geol. 80:2001–2012 (1985)
Kar Ray, M.K., Ramachandran, T.V., Chakrabarti, N.C.: Geology and economic aspect of Sargipali base metal deposit, Sundaragarh district, Orissa, Indian Minerals. 25:326–339 (1971)
Köppel, V.: Lead isotope studies of stratiform ore deposits of the Namagualand, NW Cape Province, South Africa, and their implications on the age of the Bushmanland sequence. Proc. 5th IAGOD Symp., E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart; 195–207 (1980)
Loveless, A.J.: Lead isotopes — a guide to major mineral deposits. Geoexploration. 13:13–27 (1975)
Mahadevan, T.M.: Metallogeny-concepts, constraints and prospects, in India. Indian Jour. Geol. 59:81–116 (1987)
Narayanaswami, S.: Tectonic-Metallogenic provinces of the Precambrian schield of India. Geol. Surv. India. Misc. Publ. (III), 34:14–30 (1978)
Rajarajan, K.: Tectonic and metallogeny of the lead ore deposit near Sargipali, Orissa, India. Geol. Surv. India Publ. 3:38–43 (1978)
Richards, J.R.: Some thoughts on the time-dependence of lead isotope ratios. Geochemistry International: 8–24 (1981a)
Richards, J.R.: Lead isotopic signatures: Further examination of comparison between South Africa and Western Australia. Trans. Geol. Soc. S. Afr. 89:285–304 (1986)
Roy, A.: Petrographic-Mineralogic studies of Sargipalli lead-zinc sulfide deposit and their genetic implications. Indian Minerals. 37:8–32 (1983)
Roy, A.: Lineament analysis from air and satellite photographs in elucidating tectonic controls of Sargipali lead-zinc sulphide mineralization and its implication for mineral exploration. Trans. Min. Geol. Metallurgy Inst. 71:93–113 (1983a)
Sarkar, S.C.: Sulfide mineralization at Sargipali, Orissa, India. Econ. Geol. 69:206–217 (1974)
Sarkar, S.N., Saha, A.K., Miller, J.A.: Geology of the Pre-cambrian rocks of Singhbhum and adjacent regions, Eastern India. Geol. Mag. 106:15–45 (1969)
Sarkar, S.N.: Present status of Precambrian Geochronology of peninsular India. Rept. 24th Internat. Geol. Cong. Sec. 1:260–272 (1972)
Sarkar, S.N.: Precambrian stratigraphy and geochronology of peninsular India: A review. Indian Jour. Earth Sci. 7:12–26 (1980)
Sinha, D.S., Paul, P.C.: Geophysical activity for base metals in Sundergarh district, Orissa-A review, Indian Minerals, 27:63–68 (1973)
Stacey, J.S., Kramers, J.D.: Approximation of terrestrial lead isotope evaluation by a two-stage model: Earth Plan Sci Letters. 26:207–221 (1975)
Stanton, R.L., Russell, R.D.: Anomalous leads and the emplacement of lead sulfide ores. Econ. Geol. 54:588–607 (1959)
Zartman, R.E., Doe, B.R.: Plumbotectonics — the model. Tectonophysics 75:135–162 (1981)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Vishwakarma, R.K., Ulabhaje, A.V. Sargipali galenas: Unusual lead-isotope data from eastern India. Mineral. Deposita 26, 26–29 (1991). https://doi.org/10.1007/BF00202360
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00202360