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Compositional variations in the Mesoarchean chromites of the Nuggihalli schist belt, Western Dharwar Craton (India): potential parental melts and implications for tectonic setting

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Abstract

The chromite deposits in the Archean Nuggihalli schist belt are part of a layered ultramafic–mafic sequence within the Western Dharwar Craton of the Indian shield. The 3.1-Ga ultramafic–mafic units occur as sill-like intrusions within the volcano-sedimentary sequences of the Nuggihalli greenstone belt that are surrounded by the tonalite–trondhjemite–granodiorite (TTG) suite of rocks. The entire succession is exposed in the Tagdur mining district. The succession has been divided into the lower and the upper ultramafic units, separated by a middle gabbro unit. The ultramafic units comprise of deformed massive chromitite bodies that are hosted within chromite-bearing serpentinites. The chromitite bodies occur in the form of pods and elongated lenses (~60–500 m by ~15 m). Detailed electron microprobe studies reveal intense compositional variability of the chromite grains in silicate-rich chromitite (~50% modal chromite) and serpentinite (~2% modal chromite) throughout the entire ultramafic sequence. However, the primary composition of chromite is preserved in the massive chromitites (~60–75% modal chromite) from the Byrapur and the Bhaktarhalli mining district of the Nuggihalli schist belt. These are characterized by high Cr-ratios (Cr/(Cr + Al) = 0.78–0.86) and moderate Mg-ratios (Mg/(Mg + Fe2+) = 0.38–0.58). The compositional variability occurs due to sub-solidus re-equilibration in the accessory chromite in the serpentinite (Mg-ratio = 0.01–0.38; Cr-ratio = 0.02–0.99) and in silicate-rich chromitite (Mg-ratio = 0.06–0.48; Cr-ratio = 0.60–0.99). In the massive chromitites, the sub-solidus re-equilibration for chromite is less or absent. However, the re-equilibration is prominent in the co-existing interstitial and included olivine (Fo96–98) and pyroxene grains (Mg-numbers = 97–99). Compositional variability on the scale of a single chromite grain occurs in the form of zoning, and it is common in the accessory chromite grains in serpentinite and in the altered grains in chromitite. In the zoned grains, the composition of the core is modified and the rim is ferritchromit. In general, ferritchromit occurs as irregular patches along the grain boundaries and fractures of the zoned grains. In this case, ferritchromit formation is not very extensive. This indicates a secondary low temperature hydrothermal origin of ferritchromit during serpentinization. In some occurrences, the ferritchromit rim is very well developed, and only a small relict core appears to remain in the chromite grain. However, complete alteration of the chromite grains to ferritchromit without any remnant core is also present. The regular, well-developed and continuous occurrence of ferritchromit rims around the chromite grain boundaries, the complete alteration of the chromite grains and the modification of the core composition indicate the alteration in the Nuggihalli schist belt to be intense, pervasive and affected by later low-grade metamorphism. The primary composition of chromite has been used to compute the nature of the parental melt. The parental melt calculations indicate derivation from a high-Mg komatiitic basalt that is similar to the composition of the komatiitic rocks reported from the greenstone sequences of the Western Dharwar Craton. Tectonic discrimination diagrams using the primary composition of chromites indicate a supra-subduction zone setting (SSZ) for the Archean chromitites of Nuggihalli and derivation from a boninitic magma. The composition of the komatiitic basalts resembles those of boninites that occur in subduction zones and back-arc rift settings. Formation of the massive chromitites in Nuggihalli may be due to magma mixing process involving hydrous high-Mg magmas or may be related to intrusions of chromite crystal laden magma; however, there is little scope to test these models because the host rocks are highly altered, serpentinized and deformed. The present configurations of the chromitite bodies are related to the multistage deformation processes that are common in Archean greenstone belts.

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References

  • Abzalov MZ (1998) Chrome spinels in gabbro-wehrlite intrusions of the Pechenga area, Kola Peninsula, Russia: emphasis on alteration features. Lithos 43:109–134

    Article  Google Scholar 

  • Allègre CJ (1982) Genesis of Archean komatiites in a wet ultramafic subducted plate. In: Arndt NT, Nisbet EG (eds) Komatiites. George Allen and Unwin, London, pp 495–500

    Google Scholar 

  • Bannister V, Roeder P, Poustovetov A (1998) Chromite in the Paricutin lava flows (1943–1952). J Volcanol Geotherm Res 87:151–171

    Article  Google Scholar 

  • Barnes SJ (1989) Are Bushveld U-type parent magmas boninites or contaminated Komatiites? Contrib Mineral Petrol 101:447–457

    Article  Google Scholar 

  • Barnes SJ (2000) Chromite in Komatiites. II. Modification during greenschist to mid-amphibolite facies metamorphism. J Petrol 41:387–409

    Article  Google Scholar 

  • Barnes SJ (2006) Komatiites: petrology, volcanology, metamorphism, and geochemistry. Econ Geol Special Publication 13, pp 13–49

  • Barnes SJ, Roeder PL (2001) The range of spinel compositions in terrestrial mafic and ultramafic rocks. J Petrol 42:2279–2302

    Article  Google Scholar 

  • Bidyananda M, Mitra S (2005) Chromitites from komatiitic affinity from the Archean Nuggihalli greenstone belt in South India. Mineral Petrol 84:169–187

    Article  Google Scholar 

  • Bidyananda M, Deomurari MP, Goswami JN (2003) 207Pb-206Pb ages of zircon from the Nuggihalli schist belt, Dharwar craton, southern India. Curr Sci 85:1482–1485

    Google Scholar 

  • Bliss NW, MacLean WH (1975) The paragenesis of zoned chromite from central Manitoba. Geochim Cosmochim Acta 39:973–990

    Article  Google Scholar 

  • Burkhard DJM (1993) Accessory chromian spinels: their coexistence and alteration in serpentinites. Geochim Cosmochim Acta 57:1297–1306

    Article  Google Scholar 

  • Cameron EN (1977) Chromite in the central sector of the eastern Bushveld Complex, South Africa. Am Mineral 62:1082–1096

    Google Scholar 

  • Cameron EN, Desborough GA (1969) Occurrence and characteristics of chromite deposits, eastern Bushveld Complex. Econ Geol Monogr 4:23–40

    Google Scholar 

  • Crawford AJ, Falloon TJ, Green DH (1989) Classification, petrogenesis and tectonic setting of boninites. In: Crawford AJ (ed) Boninites. Unwin and Hyman, London, pp 2–44

    Google Scholar 

  • Damodaran KT, Somasekar B (1976) Chrome chlorite (kotschubeite) from the Nuggihalli schist belt. Clays Clay Miner 24:31–35

    Article  Google Scholar 

  • De Wit MJ, Ashwal LD (1995) Greenstone belts: what are they? S Afr J Geol 98(4):505–520

    Google Scholar 

  • Devaraju TC, Alapieti TT, Kaukonen RJ, Sudhakara TL (2007) Chemistry of Cr-spinels from ultramafic complexes of western Dharwar craton and its petrogenetic implications. J Geol Soc India 69:1161–1175

    Google Scholar 

  • Devaraju TC, Viljoen RP, Sawkar RH, Sudhakara TL (2009) Mafic and ultramafic magmatism and associated mineralization in the Dharwar craton, southern India. J Geol Soc India 73:73–100

    Article  Google Scholar 

  • Dick HJB, Bullen T (1984) Chromian spinel as a petrogenetic indicator in abyssal and alpine-type peridotites and spatially associated lavas. Contrib Mineral Petrol 86:54–76

    Article  Google Scholar 

  • Droop GTR (1987) A general equation for estimating Fe3+ concentrations in ferromagnesian silicates and oxides from microprobe analysis, using stoichiometric criteria. Mineral Mag 51:431–435

    Article  Google Scholar 

  • Eales HV (2000) Implications of the chromium budget of the Western Limb of the Bushveld Complex. S Afr J Geol 103:141–150

    Article  Google Scholar 

  • Evans BW, Frost BR (1975) Chrome-spinel in progressive metamorphism—a preliminary analysis. Geochim Cosmochim Acta 39:959–972

    Article  Google Scholar 

  • Falloon TJ, Danyushevsky LV, Crawford AJ, Meffre S, Woodhead JD, Bloomer SH (2008) Boninites and adakites from the northern termination of the Tonga Trench: implications for adakite petrogenesis. J Petrol 49:697–715

    Article  Google Scholar 

  • Fan J, Kerrich R (1997) Geochemical characteristics of aluminum depleted and undepleted komatiites and HREE-enriched low-Ti tholeiites, western Abitibi greenstone belt: a heterogeneous mantle plume-convergent margin environment. Geochim Cosmochim Acta 61:4723–4744

    Article  Google Scholar 

  • Ford CE, Bigger GM, Humphries DJ, Wilson G, Dixon D, O’Hara MJ (1972) Role of water in the evolution of the lunar crust; an experimental study of sample 14310; an indication of lunar calc-alkaline volcanism. In: Proceedings of third lunar science conference, geochimica et cosmochimica acta supplement 1, pp 207–229

  • Gaetani GA, Grove TL, Bryan WB (1994) Experimental phase relations of basaltic andesite from hole 839B under hydrous and anhydrous conditions. In: Hawkins J, Parson L, Allan J (eds) Proceedings of the ocean drilling Program, scientific results 135, pp 557–563

  • Grove TL, Parman SW (2004) Thermal evolution of the earth as recorded by komatiites. Earth Planet Sci Lett 219:173–187

    Article  Google Scholar 

  • Grove TL, Parman SW, Dann JC (1999) Conditions of magma generation for Archean komatiites from the Barberton Mountainland, South Africa. In: Fei Y, Bertka CM, Mysen BO (eds) Mantle petrology; field observations and high-pressure experimentation; A tribute to Francis R (Joe) Boyd. Geochemical Society Publication 6, pp 155–167

  • Gupta S, Rai SS, Prakasam KS, Srinagesh D (2003) The nature of the crust in southern India: implications for Precambrian crustal evolution. Geophys Res Lett 30:1419. doi:10.1029/2002GL016770

    Article  Google Scholar 

  • Hamlyn PR, Keays RR (1979) Origin of chromite compositional variation in the Panton Sill, Western Australia. Contrib Mineral Petrol 69:75–82

    Article  Google Scholar 

  • Hicky RL, Frey FA (1982) Geochemical characteristics of boninite series volcanics: implications for their source. Geochim Cosmochim Acta 46:2099–2115

    Article  Google Scholar 

  • Irvine TN (1965) Chromian spinel as a petrogenetic indicator. Part I, Theory. Can J Earth Sci 2:648–671

    Google Scholar 

  • Irvine TN (1967) Chromian spinel as a petrogenetic indicator. Part II, Petrographic applications. Can J Earth Sci 4:71–103

    Article  Google Scholar 

  • Irvine TN (1975) Crystallization sequences in the Muskox intrusion and other layered intrusions-II. Origin of chromitite layers and similar deposits of other magmatic ores. Geochim Cosmochim Acta 39:991–1020

    Article  Google Scholar 

  • Irvine TN (1977) Origin of chromitite layers in the Muskox intrusion and other layered intrusions: a new interpretation. Geology 5:273–277

    Article  Google Scholar 

  • Jackson ED (1969) Chemical variation in coexisting chromite and olivine in chromitite zones of the Stillwater complex. Econ Geol Monogr 4:41–71

    Google Scholar 

  • Jafri SH, Khan N, Ahmed SM, Saxena R (1983) Geology and geochemistry of Nuggihalli schist belt, Dharwar craton, Karnataka, India. In: Naqvi SM, Rogers JJW (eds) Precambrian of South India. Memoir Geol Soc India No 4, pp 110–120

  • Jayananda M, Kano T, Peucat JJ, Channabasappa S (2008) 3.35 Ga komatiite volcanism in the western Dharwar craton, southern India: constraints from Nd isotopes and whole-rock geochemistry. Precambrian Res 162:160–179

    Article  Google Scholar 

  • Kamenetsky VS, Crawford AJ, Meffre S (2001) Factors controlling chemistry of magmatic spinel: an empirical study of associated olivine, Cr-spinel and melt inclusions from primitive rocks. J Petrol 42:655–671

    Article  Google Scholar 

  • Kerrich R, Wyman D, Fan J, Bleeker W (1998) Boninite series; low Ti-tholeiite associations from the 2.7 Ga Abitibi greenstone belt. Earth Planet Sci Lett 164:303–316

    Article  Google Scholar 

  • Leelananadam C, Burke K, Ashwal LD, Webb SJ (2006) Proterozoic mountain building in Peninsular India: an analysis based primarily on alkaline rock distribution. Geol Mag 143:1–18

    Google Scholar 

  • Lenaz D, Andreozzi GB, Mitra S, Bidyananda M, Princivalle F (2004) Crystal chemical and 57Fe Mössbauer study of chromite from the Nuggihalli schist belt (India). Mineral Petrol 80:45–57

    Article  Google Scholar 

  • Lipin BR (1993) Pressure increases in the formation of chromite seams and the development of the ultramafic series in the Stillwater complex, Montana. J Petrol 34:955–976

    Google Scholar 

  • Loferski PJ (1986) Petrology of metamorphosed chromite bearing rocks from the Red Lodge District, Montana. US Geol Surv Bull 1626-B:B1–B34

    Google Scholar 

  • Loferski PJ, Lipin BR (1983) Exsolution in metamorphosed chromite from the Red Lodge district, Montana. Am Mineral 68:777–789

    Google Scholar 

  • Manikyamba C, Naqvi SM, Rao DVS, Mohan MR, Khanna TC, Rao TG, Reddy GLN (2005) Boninites from the Neoarchaean Gadwal Greenstone belt, eastern Dharwar Craton, India: implications for Archaean subduction processes. Earth Planet Sci Lett 230:65–83

    Article  Google Scholar 

  • Marsh B (1996) Solidification fronts and magmatic evolution. Mineral Mag 60:5–40

    Article  Google Scholar 

  • Mathez EA, Mey JL (2005) Character of the UG2 chromitite and host rocks and petrogenesis of its pegmatoidal footwall, northeastern Bushveld complex. Econ Geol 100:1617–1630

    Article  Google Scholar 

  • Maurel C, Maurel P (1982) Etude expérimentale de la solubilité du chrome dans les bains silicatés basiques et sa distribution entre liquide et minéraux coexistants: conditions d’existence du spinelle chromifére. Bull Minéral 105:197–202

    Google Scholar 

  • Mitra S, Bidyananda M (2001) Crystallochemical characteristics of chlorites from the greenstone belt of south India and their geothermometric significance. Clay Sci 11:479–501

    Google Scholar 

  • Mitra S, Bidyananda M (2003) Evaluation of metallogenic potential of the Nuggihalli greenstone belt, South India. C R Geosci 335:185–192

    Article  Google Scholar 

  • Mitra S, Pal T, Maity PK, Moon HS (1992) Ferritchromit and its opto-chemical behavior. Mineral J 16:173–186

    Article  Google Scholar 

  • Mondal SK (2009) Chromite and PGE deposits of Mesoarchaean ultramafic-mafic suites within the greenstone belts of the Singhbhum craton, India: implications for mantle heterogeneity and tectonic setting. J Geol Soc India 73:36–51

    Article  Google Scholar 

  • Mondal SK, Mathez EA (2007) Origin of the UG2 chromitite layer, Bushveld complex. J Petrol 48:495–510

    Article  Google Scholar 

  • Mondal SK, Zhou M-F (2010) Enrichment of PGE through interaction of evolved boninitic magmas with early formed cumulates in a gabbro-breccia zone of the Mesoarchean Nuasahi massif (eastern India). Miner Depos 45:69–91

    Article  Google Scholar 

  • Mondal SK, Baidya TK, Rao KNG, Glascock MD (2001) PGE and Ag mineralization in a breccia zone of the Precambrian Nuasahi ultramafic-mafic complex, Orissa, India. Can Mineral 39:979–996

    Article  Google Scholar 

  • Mondal SK, Ripley EM, Li C, Ahmed AH, Arai S, Liipo J, Stowe C (2003) Oxygen isotopic compositions of Cr-spinels from Archean to Phanerozoic chromite deposits. Goldschmidt conference at Japan, Abstract with program, Abstract published in Geochim Cosmochim Acta, vol 18S, p A301

  • Mondal SK, Ripley EM, Li C, Frei R (2006) The genesis of Archean chromitites from the Nuasahi and Sukinda massifs in the Singhbhum craton, India. Precambrian Res 148:45–66

    Article  Google Scholar 

  • Mondal SK, Mukherjee R, Rosing MT, Frei R, Waight T (2008) Petrologic, geochemical and isotopic study of 3.1 Ga peridotite-chromitite suite from the western Dharwar craton (India): evidence for recycling of oceanic crust in the Mesoarchean. Eos Trans AGU 89(53), Fall Meet Suppl, Abstract V33C-2237

  • Murck BN, Campbell IH (1986) The effects of temperature, oxygen fugacity and composition on the behavior of chromium in basic and ultramafic melts. Geochim Cosmochim Acta 50:1871–1887

    Article  Google Scholar 

  • Murthy NGK (1987) Mafic dyke swarms of the Indian shield, Mafic swarms. Geol Assoc Canada special paper 34, pp 393–400

  • Naqvi SM (2005) Geology and evolution of the Indian plate (Hadean to Holocene—4 Ga to 4Ka). Capital, New Delhi, p 450

    Google Scholar 

  • Nicholson DM, Mathez EA (1991) Petrogenesis of the Merensky Reef in the Rustenburg section of the Bushveld complex. Contrib Mineral Petrol 107:293–309

    Article  Google Scholar 

  • Nijagunappa R, Naganna C (1983) Nuggihalli schist belt in the Karnataka craton: an Archaean layered complex as interpreted from chromite distribution. Econ Geol 79:507–513

    Article  Google Scholar 

  • Papp JF (2008) Chromium-2006. In: USGS minerals yearbook 2006, pp 17.1–17.22

  • Parman SW, Grove TL, Dann JC (2001) The production of Barberton komatiites in an Archean subduction zone. Geophys Res Lett 28:2513–2516

    Article  Google Scholar 

  • Parman SW, Grove TL, Dann JC (2004) A subduction model for komatiites and cratonic lithosphere mantle. S Afr J Geol 107:107–118

    Article  Google Scholar 

  • Polat A, Hofmann AW, Rosing MT (2002) Boninite-like volcanic rocks in the 3.7–3.8 Ga Isua greenstone belt, West Greenland: geochemical evidence for intra-oceanic subduction zone processes in the early earth. Chem Geol 184:231–254

    Article  Google Scholar 

  • Prendergast MD (2008) Archean komatiitic sill-hosted chromite deposits in the Zimbabwe Craton. Econ Geol 103:981–1004

    Article  Google Scholar 

  • Radhakrishna BP (1983) Archean granite-greenstone terrain of the south Indian shield. In: Naqvi SM, Rogers JJW (eds) Precambrian of South India. Memoir Geol Soc India No 4, pp 1–46

  • Radhakrishna BP (1996) Mineral resources of Karnataka. Geol Soc India, Bangalore, p 471

    Google Scholar 

  • Radhakrishna BP, Naqvi SM (1986) Precambrian continental crust of India and its evolution. J Geol 94:145–166

    Article  Google Scholar 

  • Radhakrishna BP, Vaidyanadhan R (1994) Geology of Karnataka. Geol Soc India, Bangalore, p 298

    Google Scholar 

  • Ramakrishnan M (1981) Nuggihalli and Krishnarajpet belts. In: Swami Nath J, Ramakrishnan M (eds) Early Precambrian supracrustals of southern Karnataka. Geol Surv India Mem No 112, pp 61–70

  • Ramakrishnan M (2009) Precambrian mafic magmatism in the western Dharwar craton, Southern India. J Geol Soc India 73:101–116

    Article  Google Scholar 

  • Roeder PL, Campbell IH, Jamieson HE (1979) A re-evaluation of the olivine-spinel geothermometer. Contrib Mineral Petrol 68:325–334

    Article  Google Scholar 

  • Rollinson H (1995a) Composition and tectonic settings of chromite deposits through time. Econ Geol 90:2091–2092

    Article  Google Scholar 

  • Rollinson H (1995b) The relationship between chromite chemistry and the tectonic setting of Archean ultramafic rocks. In: Blenkinsop TG, Tromps P (eds) Sub-Saharan Econ Geol Amsterdam, Balkema, pp 7–23

  • Rollinson H (1997) The Archaean komatiite-related Inyala chromitite, Southern Zimbabwe. Econ Geol 92:98–107

    Article  Google Scholar 

  • Scowen PAH, Roeder PL, Helz RT (1991) Reequilibration of chromite within Kilauea Iki lava lake, Hawaii. Contrib Mineral Petrol 107:8–20

    Article  Google Scholar 

  • Sinton JM, Detrick RS (1992) Mid-ocean ridge magma chambers. J Geophys Res 97(B):197–216

    Article  Google Scholar 

  • Sisson TW, Grove TL (1993) Experimental investigations of the role of H2O in calc-alkaline differentiation and subduction zone magmatism. Contrib Mineral Petrol 113:143–166

    Article  Google Scholar 

  • Stowe CW (1987) Chromite deposits of the Shurugwi greenstone belt, Zimbabwe. In: Stowe CW (ed) Evolution of chromium ore fields. Van Nostrand Reinhold, New York, pp 71–88

    Google Scholar 

  • Stowe CW (1994) Compositions and tectonic settings of chromite deposits though time. Econ Geol 89:528–546

    Article  Google Scholar 

  • Sun SS, Nesbitt RW, McCulloch MT (1989) Geochemistry and petrogenesis of Archaean and early Proterozoic siliceous high-magnesian basalts. In: Crawford AJ (ed) Boninites and related rocks. Unwin and Hyman, London, pp 148–173

    Google Scholar 

  • Ulmer GC (1969) Experimental investigations of chromite spinels. Econ Geol Monogr 4:114–131

    Google Scholar 

  • Wilson AH, Shirey SB, Carlson RW (2003) Archean ultradepleted komatiites formed by hydrous melting of cratonic mantle. Nature 423:858–861

    Article  Google Scholar 

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Acknowledgments

Karnataka State Mining Corporation, India, is acknowledged for logistical support and all help to RM and SKM during field work. M. Lingadevaru, T. C. Devaraju and K. S. Anantha Murthy are acknowledged for guidance and support during field work. SKM is grateful to Tod Waight and Alfons Berger for help during EPMA work and Hanne Lambert, GEUS (GEOCENTER, Copenhagen) for help during section preparation. We are grateful to Ahmed H. Ahmed and an anonymous reviewer for constructive and thoughtful comments on this article. John Bowles and Ed Mathez are acknowledged for informal review of this article with thoughtful comments and editorial suggestions on the text. We are thankful to Tim Grove for his editorial comments on this article.

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  1. Department of Geological Sciences, Jadavpur University, Kolkata, 700032, India

    Ria Mukherjee & Sisir K. Mondal

  2. Nordic Center for Earth Evolution, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, 1350, Copenhagen, Denmark

    Sisir K. Mondal, Minik T. Rosing & Robert Frei

  3. Department of Earth and Planetary Sciences, American Museum of Natural History, Central Park West@79th Street, New York, NY, 10024, USA

    Sisir K. Mondal

  4. Institute of Geography and Geology, University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen, Denmark

    Robert Frei

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Mukherjee, R., Mondal, S.K., Rosing, M.T. et al. Compositional variations in the Mesoarchean chromites of the Nuggihalli schist belt, Western Dharwar Craton (India): potential parental melts and implications for tectonic setting. Contrib Mineral Petrol 160, 865–885 (2010). https://doi.org/10.1007/s00410-010-0511-5

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