Current Science

Open Access Open Access  Restricted Access Subscription Access

Modal data-based simple statistical analysis as an effective petrogenetic indicator: a study from Kadavur gabbro-anorthosite complex, Tamil Nadu, southern India


Affiliations
1 Department of Geology, University of Calcutta, 35, B.C. Road, Kolkata 700 019, India
 

Field and petrographic studies on the Neoproterozoic Kadavur intrusive complex (10°35¢N, 78°11¢E) (located in the Southern Granulite Terrane of the Indian shield) reveal three distinct types: (i) earliest phase of deformed schistose gabbro-anorthosite; (ii) most dominant laye­red gabbro-anorthosite, and (iii) locally developed pegmatoidal gabbro-anorthosite. A simple modal data-based statistical analysis of layered gabbro-anorthosite type yields highly significant or significant correlation coefficients for different mineralogical parameters and strongly supports differentiation from a common magma. Typical dispositions of the mineralogical parameters (as depicted by isopleths patterns) suggest maintenance of a magmatic lineage in varying hydration ambience that developed several petrographic variants within the layered type
User
Notifications
Font Size

  • Ashwal, L. D., Mineralogy of mafic and Fe–Ti oxide rich differentiates of the Marcy Anorthosite massif, Adirondacks, New York. Am. Mineral., 1982, 67, 14–27.

  • Singhinolfi, G. P. and Gorgoni, C., Genesis of massif-type anorthosites – the role of high grade metamorphism. Contrib. Mineral. Petrol., 1975, 51, 119–126.

  • Crosby, P., Petrogenetic and statistical implications of modal studies in Adirondack anorthosite. In Origin of Anorthosite and Related Rocks (ed. Isachsen, Y. W.), New York State Museum and Science Service Memoir, 1969, vol. 18, pp. 289–303.

  • Taylor, G. J., The composition of the lunar highlands: evidence from modal and normative plagioclase contents in anorthositic lithic fragments and glasses. Earth Planet. Sci. Lett., 1972, 16, 263–268.

  • Neymark, L. A., Amelin, V. Y. and Larrin, A. M., Pb–Nd–Sr isotopic and geochemical constraints on the origin of the 1.54–1.56 Ga Salmi Rapakivi Granite–Anorthosite Batholith (Karelia Russia). Mineral. Petrol., 1994, 50, 173–193.

  • Ram Mohan, M., Satyanarayanan, M., Santosh, M., Sylvester, P. J., Tubrett, M. and Rebecca, L., Neoarchean suprasubduction zone arc magmatism in southern India: Geochemistry, zircon U–Pb geochronology and Hf isotopes of the Sittampundi Anorthosite Complex. Gondwana Res., 2013, 23, 539–557.

  • Van Tongernen, J. A., Hirth, G. and Kelemen, P. B., Constraints on the accretion of the gabbroic lower oceanic crust from plagioclase lattice prefered orientation in the Samail ophiolites. Earth Planet. Sci. Lett., 2015, 427, 249–261.

  • Chetty, T. R. K. and Rao, Y. J. B., The Cauvery Shear Zone, Southern Granulite Terrain, India: a crustal-scale flower structure. Gondwana Res., 2006, 10, 77–85.

  • Santosh, M., The Southern Granulite Terrane: a synopsis. Episodes, 2020, 43, 109–123.

  • Subhramanyam, C. and Verma, R. K., Gravity field, structure and tectonics of Eastern Ghats. Tectonophysics, 1986, 126, 195–212.

  • Subramanian, A. P., Petrology of the anorthosite–gabbro mass at Kadavur, Madras, India. Geol. Mag., 1956, 93, 287–300.

  • Windley, B. F. and Selvan, T. A., Anorthosites and associated rocks of Tamil Nadu, Southern India. J. Geol. Soc. India, 1975, 16, 209–215.

  • Sarkar, A. and Bose, M. K., Observations on the Kadavur igneous complex, Tiruchirapalli, Tamil Nadu. India J. Earth Sci., 1978, 15, 194–199.

  • Sarkar, A. and Bose, M. K., Geology of the Kadavur complex, Tamil Nadu. Rec. Res. Geol., 1987, 13, 97–107.

  • Kumar, V. M., Kumar, R. S., Rajaprian, K. and Singh, K., Petrography and major geochemical studies of anorthosite, Kadavur and adjoining area, Tamil Nadu, India. Int. Res. J. Earth Sci., 2013, 1, 15–22.

  • Kooijman, E., Upadhyay, D., Mezger, K., Raith, M. M., Berndt, J. and Srikantappa, C., Response of the U–Pb chronometer and trace elements in zircon to ultrahigh-temperature metamorphism: the Kadavur anorthosite complex, southern India. Chem. Geol., 2011, 290, 177–188.

  • Skjernaa, L., Tubular folds and sheath folds: definitions and conceptual models for their development, with examples from Grapesvare area, northern Sweden. J. Struct. Geol., 1989, 11, 689–703.

  • Streckeisen, A., To each plutonic rock its proper name. Earth Sci. Rev., 1976, 12, 1–33.

  • Chayes, F., Numeralogical correlation and petrographic variation. J. Geol., 1962, 70, 440–452.

  • Chayes, F., Effect of a single non zero open covariance on the simple closure test. In Geostatistics (ed. Merrian, D.), Plenum Press, New York, USA, 1970, pp. 11–22.

  • Saha, A. K., Bhattacharya, C. and Lakshmipathy, S., Some problems of interpreting the correlation between the modal variables in granitic rocks. J. Int. Assoc. Math. Geol., 1974, 6, 245–258.

  • Dasgupta, S., Ray, J., Mazumder, A., Sarkar, N. K., Das, S. and Dasgupta C., Correlation characteristics among mineralogical parameters in Porphyritic granite bodies around Raghunathpur, Purulia district, West Bengal. J. Geol. Soc. India, 2000, 54, 263–270.

  • Hazra, S., Saha, P., Ray J. and Podder, A., Simple statistical and mineralogical studies as petrogenetic indicator for Neoproterozoic Mylliem porphiritic granites of East Khasi hills, Meghalaya, North eastern India. J. Geol. Soc. India, 2010, 75, 760–768.

  • Chakraborti, T. M., Ray, A. and Deb, G. K., Crystal size distribution analysis of plagioclase from gabbro-anorthosite suite of Kuliana, Orissa, eastern India: implication for textural coarsening in a static magma chamber. Geol. J., 2015, 52, 234–248.

  • Chayes, F., A simple point counter for thin section. Am. Mineral., 1949, 34, 1–11.

  • Snedecor, G. W. and Cochran, W. G., Statistical Methods, Oxford and IBH Publication, 1967, p. 593.

  • Ashwal, L. D., Anorthosites, Springer–Verlag, Berlin, Germany, 1993, p. 422.

  • Weaver, B. L., Tarney, J. and Windley, B., Geochemistry and petrogenesis of the Fiskenaesset anorthosite complex, southern West Greenland: nature of the parent magma. Geochim. Cosmochim. Acta, 1981, 45(5), 711–725.

  • Girardi, V. A. G., Rivalenti, G. and Sinigoi, S., The petrogenesis of the Niquelandia layered, basic–ultrabasic complex, Central Goias, Brazil. J. Petrol., 1986, 27, 715–744.

  • Polat, A., Brian, J. F., Peter, W. U. A., Kalvig, P., Kerrich, R., Dilek, Y. and Yang, Z., Geochemistry of anorthositic differentiated sills in the Archean (~2970 Ma) Fiskenæsset Complex, SW Greenland: implications for parental magma compositions, geodynamic setting, and secular heat flow in arcs. Lithos, 2011, 123, 50–72.

  • Berger, J. et al., Petrogenesis of Archean PGM bearing chromitites and associated ultramafic–mafic–anorthositic rocks from the Guelb el Azib layered complex (West African craton, Mauritania). Precambrian Res., 2013, 224, 612–628.

  • Pinto, V. M. et al., Petrogenesis of the mafic–ultramafic Canindé layered intrusion, Sergipano Belt, Brazil: constraints on the metallogenesis of the associated Fe–Ti oxide ores. Ore Geol. Rev., 2020; https://doi.org/10.1016/j.oregeorev.2020.103535.

  • Longhi, J. and Ashwal, L. D., Two-stage models for lunar and terrestrial anorthosites: petrogenesis without a magma ocean. J. Geophys. Res., 1985, 90(2), C571–C584.

  • Scoates, J. S. and Frost, C. D., A strontium and neodymium isotopic investigation of the Laramie anorthosites, Wyoming, USA: implications for magma chamber processes and the evolution of magma conduits in Proterozoic anorthosites. Geochim. Cosmochim. Acta, 1996, 60(1), 95–107.

  • Huang, H., Polat, A., Fryer, B. J., Peter, W. U. A. and Windley, B. F., Geochemistry of the Mesoarchean Fiskenæsset Complex at Majorqap qâva, SW Greenland: evidence for two different magma compositions. Chem. Geol., 2012, 314–317, 66–82.

  • Bybee, G. M. et al., Proterozoic massif-type anorthosites as the archetypes of long-lived (≥100 Myr) magmatic systems – new evidence from the Kunene Anorthosite Complex (Angola). Precambrian Res., 2019; https://doi.org/10.1016/j.precamres.2019.105393.


Abstract Views: 155

PDF Views: 97




  • Modal data-based simple statistical analysis as an effective petrogenetic indicator: a study from Kadavur gabbro-anorthosite complex, Tamil Nadu, southern India

Abstract Views: 155  |  PDF Views: 97

Authors

Debaleena Sarkar
Department of Geology, University of Calcutta, 35, B.C. Road, Kolkata 700 019, India
Jyotisankar Ray
Department of Geology, University of Calcutta, 35, B.C. Road, Kolkata 700 019, India
Papiya Banerjee
Department of Geology, University of Calcutta, 35, B.C. Road, Kolkata 700 019, India
Suranjana Kayal
Department of Geology, University of Calcutta, 35, B.C. Road, Kolkata 700 019, India

Abstract


Field and petrographic studies on the Neoproterozoic Kadavur intrusive complex (10°35¢N, 78°11¢E) (located in the Southern Granulite Terrane of the Indian shield) reveal three distinct types: (i) earliest phase of deformed schistose gabbro-anorthosite; (ii) most dominant laye­red gabbro-anorthosite, and (iii) locally developed pegmatoidal gabbro-anorthosite. A simple modal data-based statistical analysis of layered gabbro-anorthosite type yields highly significant or significant correlation coefficients for different mineralogical parameters and strongly supports differentiation from a common magma. Typical dispositions of the mineralogical parameters (as depicted by isopleths patterns) suggest maintenance of a magmatic lineage in varying hydration ambience that developed several petrographic variants within the layered type

References





DOI: https://doi.org/10.18520/cs%2Fv123%2Fi4%2F601-605