Abstract
The Pan-African tectonothermal activities in areas near Sittampundi, south India, are characterized by metamorphic changes in an interlayered sequence of migmatitic metapelites, marble and calc-silicate rocks. This rock sequence underwent multiple episodes of folding, and was intruded by granite batholiths during and subsequent to these folding events. The marble and the calc-silicate rocks develop a variety of skarns, which on the basis of mineralogy; can be divided into the following types: Type I: wollastonite + clinopyroxene (mg# = 71–73) + grandite (16–21 mol% Adr) + quartz ± calcite, Type II: grandite (25–29 mol% Adr ) + clinopyroxene (mg# = 70) + calcite + quartz, and Type III: grandite (36–38 mol% Adr) + clinopyroxene (mg# = 55–65) + epidote + scapolite + calcite + quartz. Type I skarn is 2–10 cm thick, and is dominated by wollastonite (>70 vol%) and commonly occurs as boudinaged layers parallel to the regional foliation Sn1 related to the Fn1 folds. Locally, thin discontinuous lenses and stringers of this skarn develop along the axial planes of Fn2 folds. The Type II skarn, on the other hand, is devoid of wollastonite, rich in grandite garnet (40–70 vol%) and developed preferentially at the interface of clinopyroxene-rich calc-silicates layers and host marble during the later folding event. Reaction textures and the phase compositional data suggest the following reactions in the skarns: 1. calcite + SiO2 → wollastonite + V, 2. calcite + clinopyroxene + O2 → grandite + SiO2 + V, 3. scapolite + calcite + quartz + clinopyroxene + O2 → grandite + V and 4. epidote + calcite + quartz + clinopyroxene + O2 → grandite + V Textural relations and composition of phases demonstrate that (a) silica metasomatism of the host marble by infiltration of aqueous fluids (XCO2 < 0.15) led to production of large volumes of wollastonite in the wollastonite-rich skarn whereas mobility of FeO, SiO2 and CaO across the interface of marble and calc-silicate and infiltration of aqueous fluids (XCO2 < 0.35) were instrumental for the formation of grandite skarns. Composition of minerals in type II skarn indicates that Al2O3 was introduced in the host marble by the infiltrating fluid. Interpretation of mineral assemblages observed in the interlayered metapelites and the calcareous rocks in pseudosections, isothermal P-XCO2 and isobaric T-XCO2 diagrams tightly bracket the “peak” metamorphic conditions at c.9 ± 1 kbar and 750° ± 30°C. Subsequent to ‘peak’ metamorphic conditions, the rocks were exhumed on a steeply decompressive P–T path. The estimated ‘peak’ P–T estimates are inconsistent with the “extreme” metamorphic conditions (>11 kbar and >950°C) inferred for the Pan-African tectonothermal events from the neighboring areas. Field and petrological attributes of these skarn rocks are consistent with the infiltration of aqueous fluid predominantly during the Fn1 folding event at or close to the ‘peak’ metamorphic conditions. Petrological features indicate that the buffering capacity of the rocks was lost during the formation of type I and II skarns. However, the host rock could buffer the composition of the permeated fluids during the formation of type III skarn. Aqueous fluids derived from prograde metamorphism of the metapelites seem to be the likely source for the metasomatic fluids that led to the formation of the skarn rocks.
Similar content being viewed by others
References
Abu El-Enen MM, Okrusch M, Will TM (2004) Contact metamorphism and metasomatism at a dolerite-limestone contact in the Gebel Yelleq area, Northern Sinai, Egypt. Mineral Petrol 2681:135–164
Barton MD, Staude JM, Johnson DA, Snow EA (1991) Aureole systematics. In Kerrick DM (ed) Contact metamorphism, Reviews in Mineralogy 26:723–847
Baumgartner LP, Ferry JM (1991) A model coupled fluid-flow and mixed-volatile mineral reactions with applications to regional metamorphism. Contrib Mineral Petrol 106:273–285
Bhaskar Rao YJ, Chetty TRK, Janardhan AS, Gopalan K (1996) Sm–Nd and Rb–Sr ages and P–T history of the Archean Sitampundi and Bhavani layered meta-anorthosite complexes in Cauvery Shear Zone, South India: evidence for Late Proterozoic reworking of Archean crust. Contrib Mineral Petrol 125:237–250
Bhaskar Rao YJ, Janardan AS, Vijaya Kumar T, Narayana BL, Dayal AM, Taylor PN, Chetty TRK (2003) Sm–Nd model ages and Rb–Sr isotopic systematics of charnockites and gneisses across the Cauvery shear zone, southern India: implications for the Archean–Neoproterozoic Terrane boundary in the Southern Granulite Terrain. In: M. Ramakrishnan (eds) Tectonics of Southern Granulite Terrain: Kuppam–Palani Geotransect, Geol Soc India Memoir 50:297–317
Brady JB (1977) Metasomatic zones in metamorphic rocks. Geochim Cosmochim Acta 41:113–125
Braun I, Kriegsman LM (2003) Proterozoic crustal evolution of southernmost India and Sri Lanka. In: Yoshida M, Windley B, Dasgupta S (eds) Proterozoic East Gondwana: supercontinent assembly and breakup. Geol Soc Lond Spec Publ:169–202
Buick IS, Harley SL, Cartwright IC (1993) Granulite facies metamorphism: zoned calc-silicate boudins from the Rauer Group, East Antarctica. Contrib Mineral Petrol 113:557–571
Buick IS, Cartwright M, Hand M, Powell R (1994) Evidence for pre-regional metamorphic fluid infiltration of the lower calc-silicate unit, Reynolds Range Group (Central Australia). J Metamorph Geol 12:789–810
Cartwright I, Buick IS (1995) Formation of wollastonite bearing marbles during late regional metamorphic channeled fluid flow in the upper calc-silicate unit of the Reynolds Range complex, Central Australia. J Metamorph Geol 13:397–413
Chetty TRK (1996) Proterozoic shear zones in southern granulite terrain, India. In: Santosh M, Yoshoda M (eds) The Archean and Proterozoic terrains in Southern India within east Gondwana. Gondwana Research Group Memoir 3:77–89
Chetty TRK, Bhaskar Rao YJ, Narayana BL (2003) A structural cross section along Krishnagiri-Palani corridor, Southern Granulite terrain of India. In: Ramakrishna M (eds) Tectonics of Southern Granulite terrain. Geol Soc India Memoir 50:225–253
Collins AS, Windley BF (2002) The tectonic evolution of central and northern Madagascar and its place in the Final Assembly of Gondwana. J Geol 110:325–340
Collins AS, Clark C, Sajeev K, Santosh M, Kelsey DE, Hand M (2007) Passage through India: the Mozambique Ocean suture, high-pressure granulites and the Palghat–Cauvery shear zone system. Terra Nova 19:141–147
Connolly JAD (2005) Computation of phase equilibria by linear programming: a tool for geodynamic modeling and its application to subduction zone decarbonation. Earth Planet Sci Lett 236:524–541
Droop GTR (1987) A general equation for estimating Fe3+ concentrations in ferromagnesian silicates and oxides from microprobe analyses, using stoichiometric criteria. Mineral Mag 51:431–435
Drury SA, Holt Rw (1980) The tectonic framework of the South Indian craton: a reconnaissance involving LANDSAT imagery. Tectonophys 65:1–15
Drury SA, Harris NB, Holt RW, Reeves Smith GW, Wightman RT (1984) Precambrian tectonics and crustal evolution in South India. J Geol 92:1–20
Engi JM, Wersin P (1987) Derivation and application of a solution model for calcic garnet. Schweizer Mineralogie Petrographie Mittelunger 67:53–73
Ferry JM, Burt DM (1982) Characterization of metamorphic fluid composition through mineral equilibria. In: Ferry JM (Ed) Characterization of metamorphism through mineral equilibria. Mineral Soc Am Rev Mineral 10:207–262
Ferry JM, Gerdes ML (1998) Chemically reactive fluid flow during metamorphism. Ann Rev Earth Planet Sci 26:255–287
Fitzsimons ICW, Harley SL (1994) Garnet coronas in scapolite–wollastonite calc-silicates from East Antarctica: the applications and limitations of activity corrected grids. J Metamorph Geol 12:761–777
Grammatikopoulos TA, Clarke AH (2005) Petrogenesis of the Platinova skarn in the Belmont domain (Composite Arc Belt, SE Ontario, Canada). Mineral Petrol 85:141–161
Grammatikopoulos TA, Clarke AH (2006) A comparative study of wollastonite skarn genesis in the Central Metasedimentary Belt, Southeastern Ontario, Canada. Ore Geol Rev 29:146–161
Grammatikopoulos TA, Clarke AH, Pearce TH, Archibald DA (2005) Genesis of the Olden wollastonite skarn, Sharbot Lake domain, Central Metasedimentary Belt, Grenville Province, SE Ontario, Canada. Can J Earth Sci 42(8):1401–1417
Gerdes ML, Valley JW (1994) Fluid flow and mass transport at the valentine wollastonite deposit, Adirondack mountains, New York State. J Metamorph Geol 12:589–608
Ghosh JG, De Wit MJ, Zartman RE (2004) Age and tectonic evolution of Neoproterozoic ductile shear zones in the southern granulite terrain of India with implications for Gondwana studies. Tectonics 23:TC3006. doi:10.1029/2002TC001444
Harley SL (1989) The origin of granulites: a metamorphic perspective. Geol Mag 126:215–247
Harley SL (1998) On the occurrence and characterisation of ultrahigh-temperature crustal metamorphism. In: Treloar PJ, O’Brien PJ (eds) What drives metamorphism and metamorphic reactions? Geol Soc Lond Spec Publ 138:81–107
Harley SL (2003) Archean–Cambrian crustal development of East Antarctica: metamorphic characteristics and tectonic implications. In: Yoshida M, Windley BF, Dasgupta S (eds) Proterozoic East Gondwana. Supercontinent assembly and breakup. Geol Soc Spec Publ 206:203–230
Harley SL, Buick IS (1992) Wollastonite–scapolite assemblages as indicators of granulite pressure–temperature–fluid histories: the Rauer Group, East Antarctica. J Petrol 33:693–728
Harley SL, Fitzsimons ICW, Buick IS (1994) Reactions and textures in wollastonite–scapolite granulites and their significance for pressure–temperature–fluid histories of high grade terranes. In: Raith M, Hoernes S (eds) Tectonic, metamorphic and isotopic evolution of deep crustal rocks, with special emphasis on Sri Lanka. Precam Res 66:309–323
Holdaway MJ (2000) Application of new experimental and garnet Margules data to the garnet–biotite geothermometer. Am Mineral 85:881–892
Holland TJBH, Powell R (1998) An internally consistent thermodynamic data set for phases of petrological interest. J Metamorph Geol 16:309–343
John MM, Balakrishnan S, Bhadra BK (2005) Contrasting metamorphism across Cauvery shear zone, south India. J Earth Sys Sci 114:143–158
Kelsey DE, Clark C, Hand M, Collins AS (2006) Comment on “First report of garnet–corundum rocks from southern India: implications for prograde high-pressure (eclogite-facies?) metamorphism”. Earth Planet Sci Lett 249:529–534
Kerrick DM (1991) Contact metamorphism. Rev Mineral Geochem 26:1–847
Kretz R (1983) Symbols for rock-forming minerals. Am Mineral 68:277–279
McDade P, Harley SL (2001) A petrogenetic grid for aluminous granulite facies metapelites in the KFMASH system. J Metamorph Geol 19:45–59
Meissner B, Deters P, Srikantappa C, Kohler H (2002) Geological evolution of the Moyer, Bhavani and Palghat shear zones of southern India: implications for Gondwana correlation. Precambrian Res 114:149–175
Moecher DP, Essene EJ (1991) Calculations of CO2 activities using scapolite equilibria: constraints on the presence and the composition of a fluid phase during high grade metamorphism. Contrib Mineral Petrol 108:219–240
Mukhopadhyay D, Senthil Kumar P, Srinivasan R, Bhattacharya T (2003) Nature of Palghat-Cauvery lineament in the region south of Namakkal, Tamil Nadu: Implication for terrane assembly in the South Indian granulite province In: Ramakrishna M (ed) Tectonics of Southern Granulite terrain. Geol Soc India Memoir 50:279–296
Naha K, Srinivasan R, Deb GK (1997) Structural geometry of the early Precambrian terrane south of Coimbatore in the “Palghat Gap”, southern India. Proc Ind Acad Sci (Earth Planet Sci) 106:237–247
Newton RC, Charlu TV, Kleppa OJ (1980) Thermochemistry of the high structural state plagioclases. Geochem Cosmochem Acta 44:933–941
Oterdoom H, Gunter WD (1983) Activity models for plagioclase and CO2-scapolites: an analysis of field and laboratory data. Am J Sci 283-A:255–282
Raith MM, Srkantappa C (2008) Corundum–leucosome-bearing aluminous gneiss from Ayyarmalai, Southern Granulite Terrain, India: a textbook example of vapour phase-absent muscovite melting in silica-undersaturated pelitic rocks, 86th Annual meting of DMG:14–17
Rebbert CR, Rice JM (1997) Scapolite–plagioclase exchange: Cl–CO3 scapolite solution chemistry and implications for persterite plagioclase. Geochem Cosmochem Acta 61:555–567
Rumble D, Ferry JM, Hoering TC, Boucot AJ (1982) Fluid flow during metamorphism at the Beaver brook fossil locality, New Hampshire. Am J Sci 282:886–919
Santosh M, Collins AS (2003) Gemstone mineralization in the Palghat–Cauvery Shear Zone Systems (Karur–Kangayam Belt), southern India. Gondwana Res 6:911–918
Santosh M, Yokoyama K, Biju-Sekhar S, Rogers JJW (2003) Multiple tectonothermal events in the granulite blocks of southern India revealed from EPMA dating: implications on the history of supercontinents. Gondwana Res 6:29–63
Santosh M, Tsonogae T, Koshimoto S (2004) First report of sapphirine-bearing rocks from the Palghat–Cauvery shear zone system, south India. Gondwana Res 7:620–626
Santosh M, Collins AS, Morimoto I, Yokoyama K (2005) Depositional constraints and age of metamorphism in southern India: U–Pb chemical (EPMA) and isotopic (SIMS) ages from the Trivandrum Block. Geol Mag 142:1–14
Santosh M, Collins AS, Morimoto I, Koshimoto S, Tsutsumi Y, Yokoyama K (2006) The timing of ultrahigh-temperature metamorphism in Southern India: U–Th–Pb electron microprobe ages from zircon and monazite in sapphirine-bearing granulites. Gondwana Res 10:128–155
Schumacher JC, Robinson P (1987) Mineral chemistry and metasomatic growth of aluminous enclaves in gedrite–coedierite–gneiss from southwestern New Hampshire. Am J Sci 288:619–663
Sengupta P, Raith MM (2002) Garnet compositions as a petrogenetic indicator: an example from a marble-calc-granulite interface at Kondapalle, Eastern Ghats belt, India. Am J Sci 302:686–727
Sengupta P, Sanyal S, Dasgupta S, Fukuoka M, Ehl J, Pal S (1997) Controls of mineral reactions in high-grade garnet–wollastonite–scapolite bearing calc-silicate rocks: an example from Anakapalle, Eastern Ghats, India. J Metamorph Geol 15:551–564
Sengupta P, Sen J, Dasgupta S, Raith M, Bhui UK, Ehl J (1999) Ultra-high temperature metamorphism of metapelitic granulites from Kondapalle, Eastern Ghats belt: implications for the Indo-Antarctic correlation. J Petrol 40:1065–1087
Sengupta P, Raith MM, Levitsky VI (2004) Compositional characteristics and paragenetic relations of magnesiohögbomite in aluminous amphibolites from the Belomorian complex, Baltic Shield, Russia. Am Mineral 89:819–831
Shimpo M, Tsunogae T, Santosh M (2006) First report of garnet-corundum rocks from southern India: Implications for prograde high-pressure (eclogite-facies?) metamorphism. Earth Planet Sci Lett 242:111–129
Spear FS (1993) Metamorphic phase equilibria and pressure–temperature–time paths. Mineral Soc Am Mono Series, 799 pp
Srikantappa C, Srinivas G, Basavarajappa HT, Prakash Narasimha KN, Basavalingu B (2003) Metamorphic evolution and fluid regime in the deep continental crust along the N–S Geotransect from Vellar to Dharapuram, Southern India. In: Ramakrishna M (ed) Tectonics of Southern Granulite terrain. Geol Soc India Memoir 50:319–373
Stephenson NCN, Cook NDJ (1997) Metamorphic evolution of the calc-silicate granulites near Batteye Glacier, northern Prince Charles Mountain, East Antarctica. J Metamorph Geol 15:361–378
Subramaniam AP (1956) Mineralogy and petrology of the Sittampundi complex, Salem district, Madras state, India. Bull Geol Soc Am 67:317–389
Thompson AB (1975) Calc-silicate diffusion zones between marble and pelitic schist. J Petrol 16:314–346
Thompson JB, Hovis GL (1979) Entropy of mixing in sanidine. Am Mineral 64:57–65
Tsunogae T, Santosh M (2003) Sapphirine and corundum bearing granulites from Karur, Madurai block, southern India. Gondwana Res 6:925–930
Valley JW, Bohlen SR, Kistler RW (1990) Metamorphism in the Adirondacks: II. The role of fluids. J Petrol 31:555–596
Wu CM, Zhang J, Ren LD (2004) Empirical garnet–biotite–plagioclase–quartz (GBPQ) geobarometry in medium- to high-grade metapelites. J Petrol 45:1907–1921
Yoshida M, Rajesh HM, Santosh M (1999) Juxtaposition of India and Madagascar: a perspective. Gondwana Res 2:449–462
Zhang Z, Saxena SK (1991) Thermodynamic properties of andradite and application to skarn with coexisting andradite and hedenbergite. Contrib Mineral Petrol 107:255–263
Acknowledgements
Financial assistance for this study was received from the research grants of Department of Science and Technology (DST), India. DST-DAAD PPP project and CAS, Department of Geological Sciences, Jadavpur University. PS expresses his gratitude to the Alexander von Humboldt Foundation, Germany for a research fellowship during whose tenure the draft of the Ms. was prepared. PS, UD and UKB are thankful to Prof. I Braun for inviting them to visit the Mineralogy-Petrology Institute, University of Bonn during 2005-2006. We thank Prof. M.M. Raith for introducing us to the fascinating rocks of the Sittampundi complex and for many stimulating discussions on the subject. Prof. C. Ballhaus, director, Department of Mineralogy–Petrology, University of Bonn, Germany for providing PS, UKB and UD all the facilities of the institute and for many stimulating discussion. DM acknowledges support from Senior Scientist Project of the Indian National Science Academy. We are thankful to the journal reviewers J.C. Schumacher and T. Grammatikopoulos and to the editor H. Marschal for their valuable comments and extensive linguistic and editorial correction.
Author information
Authors and Affiliations
Corresponding author
Additional information
Editorial handling: H. Marshall
Rights and permissions
About this article
Cite this article
Sengupta, P., Dutta, U., Bhui, U.K. et al. Genesis of wollastonite- and grandite-rich skarns in a suite of marble-calc-silicate rocks from Sittampundi, Tamil Nadu: constraints on the P–T–fluid regime in parts of the Pan-African mobile belt of South India. Miner Petrol 95, 179–200 (2009). https://doi.org/10.1007/s00710-008-0037-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00710-008-0037-y