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Prograde polyphase regional metamorphism of pelitic rocks, NW of Jamshedpur, eastern India: constraints from textural relationship, pseudosection modelling and geothermobarometry

Published online by Cambridge University Press:  11 November 2019

D Prakash
Affiliation:
Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi221005, India
DK Patel*
Affiliation:
Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi221005, India
MK Yadav
Affiliation:
Centre of Advanced Study in Geology, University of Lucknow, Lucknow226007, India
B Vishal
Affiliation:
Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi221005, India
S Tewari
Affiliation:
Centre for Earth Sciences, Indian Institute of Science, Bangalore560012, India
R Yadav
Affiliation:
Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi221005, India
SK Rai
Affiliation:
Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi221005, India
CK Singh
Affiliation:
Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi221005, India
*
Author for correspondence: DK Patel, Email: dkpbhugeo@gmail.com

Abstract

The study area belongs to the Singhbhum metamorphic belt of Jharkhand, situated in the eastern part of India. The spatial distribution of the index minerals in the pelitic schists of the area shows Barrovian type of metamorphism. Three isograds, viz. garnet, staurolite and sillimanite, have been delineated and the textural study of the schists has revealed a time relation between crystallization and deformation. Series of folds with shifting values of plunges in the supracrustal rocks having axial-planar schistosity to the folds have been widely cited. Development of these folds could be attributed to the second phase of deformation. In total, two phases of deformation, D1 and D2, in association with two phases of metamorphism, M1 and M2, have been lined up in the study area. Chemographic plots of reactant and product assemblages corresponding to various metamorphic reactions suggest that the pattern of metamorphic zones mapped in space is in coherence with the temporal-sequential change during prograde metamorphism. The prograde PT evolution of the study area has been obtained using conventional geothermobarometry, internally consistent winTWQ program and Perple_X software in the MnNCKFMASHTO model system. Our observations suggest that the progressive metamorphism in the area is not related to granitic intrusion or migmatization but that it was possibly the ascending plume that resulted in the M1 phase of metamorphism followed by D1 deformation. The second and prime metamorphic phase, M2, with its possible heat source generated by crustal overloading, was preceded by D1 and it lasted until late- to post-D2 deformation.

Type
Original Article
Copyright
© Cambridge University Press 2019

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References

Acharyya, SK, Gupta, A and Orihashi, Y (2010) Neoarchaean-Palaeoproterozoic stratigraphy of the Dhanjori basin, Singhbhum Craton, eastern India: and recording of a few U-Pb zircon dates from its basal part. Journal of Asian Earth Science 39, 527–36.CrossRefGoogle Scholar
Banerjee, S and Matin, A (2013) Evolution of microstructures in Precambrian shear zones: an example from eastern India. Journal of Structural Geology 50, 199208.CrossRefGoogle Scholar
Berman, RG (1988) Internally-consistent thermodynamic data for minerals in the system Na2O-K2O-CaO-MgO-FeO-Fe2O3-Al2O3-SiO2-TiO2-H2O-CO2. Journal of Petrology 29, 445522.CrossRefGoogle Scholar
Berman, RG (1991) Thermobarometry using multi-equilibrium calculations; a new technique, with petrological applications. The Canadian Mineralogist 29, 833–55.Google Scholar
Berman, RG and Aranovich, LY (1996) Optimized standard state and mixing properties of minerals: I. model calibration for olivine, orthopyroxene, cordierite, garnet, and ilmenite in the system FeO–MgO–CaO–Al2O3–TiO2–SiO2. Contributions to Mineralogy and Petrology 126, 124.CrossRefGoogle Scholar
Bhattacharya, A, Mohanty, L, Maji, A, Sen, SK and Raith, M (1992) Non-ideal mixing in the phlogophite-annite binary: constraints from experimental data on Mg-Fe partitioning and a reformulation of the biotite-garnet geothermometers. Contributions to Mineralogy and Petrology 111, 8793.CrossRefGoogle Scholar
Bhattacharya, DS and Sanyal, P (1988) The Singhbhum orogeny – its structure and stratigraphy. Memoirs of the Geological Survey of India 8, 85111.Google Scholar
Bhattacharya, HN, Nelson, DR, Thern, ER and Altermann, W (2014) Petrogenesis and geochronology of the Arkasani Granophyre and felsic Dalma volcanic rocks: implications for the evolution of the Proterozoic North Singhbhum Mobile Belt, east India. Geological Magazine 152, 492503.CrossRefGoogle Scholar
Bose, MK and Chakraborti, MK (1981) Fossil marginal basin from the Indian shield: a model for the evolution of the Singhbhum Precambrian belt, eastern India. Geologische Rundschau 70, 514–18.CrossRefGoogle Scholar
Brown, M (1994) The generation, segregation, ascent and emplacement of granite magma: the migmatite-to-crustally-derived granite connection in thickened orogens. Earth-Science Reviews 36, 83130.CrossRefGoogle Scholar
Brown, M (2001a) Crustal melting and granite magmatism: key issues. Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy 26, 201–12.CrossRefGoogle Scholar
Brown, M (2001b) Orogeny, migmatites and leucogranites: a review. Journal of Earth System Science 110, 313–36.CrossRefGoogle Scholar
Brown, M and Sawyer, EW (2008) Granites, migmatites and residual granulites: relationships and processes. In Working with Migmatites (eds Sawyer, EW and Brown, M), pp. 97144. Quebec City: Mineralogical Association of Canada Short Course Series 38.Google Scholar
Bucher, K and Grapes, R (2011) Metamorphism of dolomites and limestones. In Petrogenesis of Metamorphic Rocks, pp. 225–55. Berlin and Heidelberg: Springer.CrossRefGoogle Scholar
Chakraborty, KR and Sen, SK (1967) Regional metamorphism of pelitic rocks around Kandra, Singhbhum, Bihar. Contributions to Mineralogy and Petrology 16, 210–32.CrossRefGoogle Scholar
Chakraborty, M, Sengupta, N, Biswas, S and Sengupta, P (2015) Phosphate minerals as a recorder of P-T-fluid regimes of metamorphic belts: example from the Palaeoproterozoic Singhbhum Shear Zone of the East Indian shield. International Geology Review 57, 1619–32.CrossRefGoogle Scholar
Clark, C and Hand, M (2010) Decoding Mesoproterozoic and Cambrian metamorphic events in Willyama Complex metapelites through the application of Sm–Nd garnet geochronology and P–T pseudosection analysis. Gondwana Research 17, 5974.CrossRefGoogle Scholar
Dasgupta, S, Sengupta, P, Guha, D and Fukuoka, M (1991) A refined garnet–biotite Fe–Mg exchange geothermometer and its application in amphibolites and granulites. Contributions to Mineralogy and Petrology 109, 130–7.CrossRefGoogle Scholar
Dickenson, MP and Hewitt, DA (1986) A garnet-chlorite geothermometer. Geological Society of America Abstracts with Programs 18, 584.Google Scholar
Dövényi, P, Horváth, F, Liebe, P, Gálfi, J and Erki, I (1983) Geothermal conditions of Hungary. Geophysical Transactions 29, 3114.Google Scholar
Drury, MJ (1991) Heat flow in the Canadian Shield and its relation to other geophysical parameters. In Terrestrial Heat Flow and the Lithosphere Structure, pp. 317–37. Berlin and Heidelberg: Springer.CrossRefGoogle Scholar
Dunn, JA (1929) The geology of north Singhbhum including parts of Ranchi and Manbhum districts. Memoirs of the Geological Survey of India 54, 166 pp.Google Scholar
Dunn, JA and Dey, AK (1942) The geology and petrology of eastern Singhbhum and surrounding areas. Memoirs of the Geological Survey of India 69, 281450.Google Scholar
Dwivedi, SB and Lal, SN (1992) Prograde Barrovian type of metamorphism of pelitic rocks around Kandra, District Singhbhum, Bihar. Proceedings – Indian National Science Academy, Part A 58, 195206.Google Scholar
Dwivedi, SB, Singh, TN and Prakash, D (1993) Precambrian metamorphites of the area around Kandra, district Singhbhum, Bihar. Indian Journal of Engineers 23, 83–8.Google Scholar
England, PC and Thomson, AB (1984) Pressure–temperature–time paths of regional metamorphism I. Heat transfer during the evolution of regions of thickened continental crust. Journal of Petrology 25, 894928.CrossRefGoogle Scholar
Eriksson, PG, Mazumder, R, Catuneanu, O, Bumby, AJ and Ilondo, B (2006) Precambrian continental freeboard and geological evolution: a time perspective. Earth Science Review 79, 165204.CrossRefGoogle Scholar
Eriksson, PG, Mazumder, R, Sarkar, S, Bose, PK, Altermann, W and Van der Merwe, R (1999) The 2.7–20 Ga volcano-sedimentary record of Africa, India and Australia: evidence for global and local changes in sea level and continental freeboard. Precambrian Research 97, 269302.CrossRefGoogle Scholar
Ferry, JM and Spear, FS (1978) Experimental calibration of the partitioning of Fe and Mg between biotite and garnet. Contributions to Mineralogy and Petrology 66, 113–17.CrossRefGoogle Scholar
Fuhrman, ML and Lindsley, DH (1988) Ternary-feldspar modeling and thermometry. American Mineralogist 73, 201–15.Google Scholar
Ganguly, J and Saxena, SK (1984) Mixing properties of aluminosilicate garnets: constraints from natural and experimental data, and applications to geothermobarometry. American Mineralogist – Mineralogical Society of America 69, 8897.Google Scholar
Ghent, ED and Stout, MZ (1981) Geothermometry and geobametry of plagioclasebiotite-garnet-muscovite assemblages. Contributions to Mineralogy and Petrology 76, 92–7.CrossRefGoogle Scholar
Ghent, ED, Stout, MZ, Black, PM and Brothers, RN (1987) Chloritoid- bearing rocks associated with blueschists and eclogites, northern Caledonia. Journal of Metamorphic Geology 5, 239–54.CrossRefGoogle Scholar
Goldman, AE and Albee, AL (1977) Correction of Mg/Fe partioning between garnet and biotite with 18O/16O partitioning between quartz and magnetite. American Journal of Science 277, 750–67.CrossRefGoogle Scholar
Grambling, JA (1990) Internally-consistent geothermometry and H2O barometry in metamorphic rocks: the example garnet-chloride-quartz. Contributions to Mineralogy and Petrology 105, 617–28.CrossRefGoogle Scholar
Green, NL and Usdansky, SI (1986) Ternary-feldspar mixing relations and thermobarometry. American Mineralogist – Mineralogical Society of America 71, 1100–8.Google Scholar
Guidotti, CV (1970) The mineralogy and petrology of the transition from the lower to upper sillimanite zone in the Oquossoc area, Maine. Journal of Petrology 11, 277336.CrossRefGoogle Scholar
Henry, DJ, Guidotti, CV and Thomson, JA (2005) The Ti-saturation surface for low-to-medium pressure metapelitic biotites: implications for geothermometry and Ti-substitution mechanisms. American Mineralogist 90, 316–28.CrossRefGoogle Scholar
Hodges, KV and Crowley, PD (1985) Error estimation and empirical geothermobarometry for pelitic systems. American Mineralogist – Mineralogical Society of America 70, 702–9.Google Scholar
Hoisch, TD (1990) Empirical calibration of six geobarometers for the mineral assemblage quartz + muscovite + biotite + plagioclase + garnet. Contributions to Mineralogy and Petrology 104, 225–34.CrossRefGoogle Scholar
Holdaway, MJ (1971) Stability of andalusite and the aluminium silicate phase diagram. American Journal of Sciences 271, 97131.Google Scholar
Holdaway, MJ and Lee, SM (1977) Fe-Mg cordierite stability in high grade pelitic rocks based on experimental, theoretical and natural observations. Contributions to Mineralogy and Petrology 6, 175–98.CrossRefGoogle Scholar
Holland, TJB and Powell, RTJB (1998) An internally consistent thermodynamic data set for phases of petrological interest. Journal of Metamorphic Geology 16, 309–43.CrossRefGoogle Scholar
Iyengar, SVP and Murthy, YGK (1982) The evolution of the Archean-Proterozoic crust in parts of Bihar and Orissa, eastern India. Records of the Geological Survey of India 112, 15.Google Scholar
James, HL (1955) Zones of regional metamorphism in the Precambrian of northern Michigan. Geological Society of America Bulletin 66, 1455–88.CrossRefGoogle Scholar
Jennings, ES and Holland, TJB (2015) A simple thermodynamic model for melting of peridotite in the system NCFMASOCr. Jounal of Petrology 56, 869–92.CrossRefGoogle Scholar
Jones, MQW (1988) Heat flow in the Witwatersrand Basin and environs and its significance for the South African shield geotherm and lithosphere thickness. Journal of Geophysical Research: Solid Earth 93, 3243–60.CrossRefGoogle Scholar
Kent, R (1991) Lithospheric uplift in eastern Gondwana: evidence for a long-lived mantle plume system? Geology 19, 1923.2.3.CO;2>CrossRefGoogle Scholar
Kröner, A (1979) Pan African plate tectonics and its repercussions on the crust of northeast Africa. Geologische Rundschau 68, 565–83.CrossRefGoogle Scholar
Kröner, A (1981) Precambrian plate tectonics. In Precambrian Plate Tectonics, vol. 4 (ed Kröner, A), pp. 5790. Amsterdam: Elsevier.Google Scholar
Lal, RK, Ackermand, D and Singh, JB (1987) Geothermobarometry in Barrovian type of metamorphism of pelitic schists, Sini, district Singhbhum. Recent Researches in Geology 13, 125–42.Google Scholar
Lal, RK and Singh, JB (1978) Prograde polyphase regional metamorphism and metamorphic reactions in pelitic schists at Sini, district Singhbhum, India. Neues Jahrbuch für Mineralogie 131, 304–33.Google Scholar
Mahadevan, TM (2002) Geology of Bihar and Jharkhand. Bangalore: Geological Society of India, 563 pp.Google Scholar
Mahato, S, Goon, S, Bhattacharya, A, Mishra, B and Bernhardt, HJ (2008) Thermo-tectonic evolution of the North Singhbhum Mobile Belt (eastern India): a view from the western part of the belt. Precambrian Research 162, 102–27.CrossRefGoogle Scholar
Matin, A, Banerjee, S, Gupta, CD and Banerjee, N (2012) Progressive deformation across a ductile shear zone: an example from the Singhbhum Shear Zone, eastern India. International Geology Review 54, 290301.CrossRefGoogle Scholar
Mazumder, R (2005) Proterozoic sedimentation and volcanism in the Singhbhum crustal province, India and their implications. Sedimentary Geology 176, 167–93.CrossRefGoogle Scholar
Mazumder, R, Bose, PK and Sarkar, S (2000) A commentary on the tectono-sedimentary record of the pre-2.0 Ga continental growth of India vis-a-vis pre-Gondwana Afro-Indian supercontinent. Journal of African Earth Science 30, 201–17.CrossRefGoogle Scholar
Mazumder, R, Van Loon, AJ, Mallik, L, Reddy, SM, Arima, M, Altermann, W, Eriksson, PG and De, S (2012a) Mesoarchaean-Palaeoproterozoic stratigraphic record of the Singhbhum crustal province, eastern India: A synthesis. In Palaeoproterozoic of India (eds R Mazunder and D Saha), pp. 3149. Geological Society of London, Special Publication no. 365.CrossRefGoogle Scholar
Mazumder, R, Eriksson, PG, De, S, Bumby, AJ and Lenhardt, N (2012b) Palaeoproterozoic sedimentation on the Singhbhum craton: global context and comparison with Kaapvaal. In Palaeoproterozoic of India (eds Mazumder, R and Saha, D), pp. 5176. Geological Society of London, Special Publication no. 365.Google Scholar
Mitra, R (1954) Pelitic metamorphites around Kandra, Singhbhum. Quarterly Journal of the Geological, Mining and Metallurgical Society of India 26, 149–68.Google Scholar
Molnar, P and Gray, D (1979) Subduction of continental lithosphere: some constraints and uncertainties. Geology 7, 5862.2.0.CO;2>CrossRefGoogle Scholar
Mukhopadhyay, D (2001) The Archaean nucleus of Singhbhum: the present state of knowledge. Gondwana Research 4, 307–18.CrossRefGoogle Scholar
Naha, K (1961) Precambrian sedimentation around Ghatshila in east Singhbhum, eastern India. Proceedings of the National Academy of Sciences, India 27, 361–72.Google Scholar
Naha, K (1965) A critique of “orogenic trends” in Archaean correlation in India. Tectonophysics 1, 431–8.CrossRefGoogle Scholar
Pal, DC and Rhede, D (2013) Geochemistry and chemical dating of uraninite in the Jaduguda uranium deposit, Singhbhum shear zone, India:– implications for uranium mineralization and geochemical evolution of uraninite. Economic Geology 108, 1499–515.CrossRefGoogle Scholar
Perchuk, LL (1989) Mutual coordination of some Fe-Mg geothermometry on the basis of the Nernst Law: a revision. Geokhomia 5, 611–22.Google Scholar
Perchuk, LL, Aranovich, LY, Podlesskii, KK, Lavrenteva, IV, Gerasimov, VY, FedKin, VV, Kitsul, VI, Karasakov, LP and Berdnikov, NV (1985) Precambrian granulites of the Aldan shield, Eastern Siberia, USSR. Journal of Metamorphic Geology 3, 265310.CrossRefGoogle Scholar
Perchuk, LL and Lavrenteva, IV (1983) Experimental investigation of exchange equilibria in the system cordierite- garnet- biotite. In Kinetics and Equilibrium in Mineral Reactions (ed. Saxena, SK). pp. 199239. New York: Springer-Verlag.CrossRefGoogle Scholar
Powell, R and Holland, TJB (1988) An internally consistent thermodynamic dataset with uncertainties and correlations: 3. Applications to geobarometry worked examples and a computer program. Journal of Metamorphic Geology 6, 173204.CrossRefGoogle Scholar
Prakash, D, Patel, DK, Tewari, S, Yadav, MK and Yadav, R (2017) Metamorphic zonal sequences of pelitic schists and gneisses from the area around Kandra (Jharkhand): constraints from field and textural relationship. Journal of the Geological Society of India 89, 139–44.CrossRefGoogle Scholar
Ray, L, Kumar, PS, Reddy, GK, Roy, S, Rao, GV, Srinivasan, R and Rao, RUM (2003) High mantle heat flow in a Precambrian granulite province: evidence from southern India. Journal of Geophysical Research: Solid Earth, 108, 2084. doi: 10.1029/2001JB000688.CrossRefGoogle Scholar
Ray, S and Gangopadhyay, PK (1971) Metamorphic belts in Singhbhum, Manbhum and Chhota Nagpur, E. India. Journal of the Geological Society of India 12, 286–94.Google Scholar
Reddy, SM, Clarke, C and Mazumder, R (2009) Temporal constraints on the evolution of the Singbhum Crustal Province from U–Pb SHRIMP data. In Paleoproterozoic Supercontinents and Global Evolution (eds Saha, D and Mazumder, R), pp. 17–18. International Association for Gondwana Research, Conference Series 9. Kolkata: Indian Statistical Institute.Google Scholar
Reddy, SM and Evans, DAD (2009) Palaeoproterozoic supercontinents and global evolution: correlations from core to atmosphere. In Palaeoproterozoic Supercontinents and Global Evolution (eds Reddy, SM, Mazumder, R, Evans, DAD and Collins, A), pp. 126. Geological Society of London, Special Publication no. 323.Google Scholar
Robinson, D, Reverdatto, VV, Bevins, RE, Polyansky, OP and Sheplev, VS (1999) Thermal modeling of convergent and extensional tectonic settings for the development of low-grade metamorphism in the Welsh Basin. Journal of Geophysical Research: Solid Earth 104, 23069–80.CrossRefGoogle Scholar
Roy, A (1966) The method of continuation in mining geophysical interpretation. Geoexploration 4, 6583.CrossRefGoogle Scholar
Roy, A, Sarkar, S, Jeyakumar, S, Aggrawal, SK and Ebihara, M (2002a) Mid-Proterozoic plume-related thermal event in Eastern Indian craton: evidence from trace elements, REE geochemistry and Sr–Nd isotope systematic of basic–ultrabasic intrusives from Dalma volcanic belt. Gondwana Research 5, 133–46 CrossRefGoogle Scholar
Roy, A, Sarkar, S, Jeyakumar, S, Aggrawal, SK and Ebihara, M (2002b) Sm–Nd age and mantle characteristics of the Dhanjori volcanic rocks, Eastern India. Geochemical Journal 36, 503–18.CrossRefGoogle Scholar
Saha, AK (1970) The present status of the Precambrian geology of the Singhbhum region. In Proceedings of the 2nd Symposium on Upper Mantle Project, 28–31 December, Hyderabad, India, pp. 259–78. Hyderabad: National Geophysical Research Institute.Google Scholar
Sarkar, AN (1982) Precambrian tectonic evolution of eastern India: a model of converging microplates. Tectonophysics 86, 363–97.CrossRefGoogle Scholar
Sarkar, SN, Ghosh, DK and Lambert, RJS (1985) Rubidium- Strontium and lead isotopic studies of the soda granites from Mosabani, Singhbhum copper belt, India. Indian Journal of Earth Sciences 13, 101–16.Google Scholar
Sarkar, SN, Ghosh, DK and Lambert, RJS (1986) Rubidium-strontium and lead isotopic studies of the Soda granites from Musaboni area, Singhbhum Copper Belt In Geology and Geochemistry of Sulphide Ore Bodies and Associated Rocks in Musaboni and Rakha Mines Section in the Singhbhum Copper Belt (ed. Sarkar, SN), pp. 101–10. Dhanbad: Diamond Jubilee Monograph, Indian School of Mines Dhanbad.Google Scholar
Sarkar, SN and Saha, AK (1962) A revision of the Pre-Cambrian stratigraphy and tectonics of Singhbhum and adjacent regions. Quarterly Journal of the Geological, Mineralogical and Metallurgical Society of India 34, 97136.Google Scholar
Sarkar, SN and Saha, AK (1977) The present status of the Precambrian stratigraphy, tectonics and geochronology of Singhbhum-Keonjhar-Mayurbhanj region, Eastern India. Indian Journal of Earth Sciences S. Ray volume, 3765.Google Scholar
Sengupta, S and Chattopadhyay, B (2004) Singhbhum mobile belt – how far it fits an ancient orogen. In Proceedings of the Workshop on (IGCP-453) Uniformitarianism Revised Edition on Orogens of India, pp. 2431. Hyderabad: Geological Survey of India, Special Publication no. 84.Google Scholar
Sengupta, S, Sarkar, G, Ghosh-Roy, AK, Bhaduri, SK, Gupta, SN and Mandal, A (2000) Geochemistry and Rb–Sr geochronology of acid tuffs from the northern fringe of the Singhbhum craton and their significance in the Precambrian evolution. Indian Minerals 54, 4356.Google Scholar
Spear, FS (1993) Metamorphic Phase Equilibria and Pressure-Temperature-Time Path. Mineralogical Society of America Monograph. Chelsea, MI: Book Crafters, 799 pp.Google Scholar
Thompson, AB (1976) Mineral reaction in pelitic rocks: I. Prediction of P-T-X (Fe-Mg) phase relations, American Journal of Science 276, 401–24.CrossRefGoogle Scholar
Tinkham, DK and Ghent, ED (2005) Estimating PT conditions of garnet growth with isochemical phase-diagram sections and the problem of effective bulk-composition. The Canadian Mineralogist 43, 3550.CrossRefGoogle Scholar
Turner, FJ (1968) Metamorphic Petrology: Mineralogical and Field Aspects. New York: McGraw-Hill, 403 pp.Google Scholar
White, RW, Powell, R and Clarke, GL (2003) Prograde metamorphic assemblage evolution during partial melting of metasedimentary rocks at low pressures: migmatites from Mt Stafford, Central Australia. Journal of Petrology 44, 1937–60.CrossRefGoogle Scholar
White, RW, Powell, R, Holland, JB, Johnson, TE and Green, ECR (2014) New mineral activity-composition relations for thermodynamic calculations in metapelitic systems. Journal of Metamorphic Geology 32, 261–86CrossRefGoogle Scholar
White, RW, Powell, R and Holland, TJB (2001) Calculation of partial melting equilibria in the system Na2O–CaO–K2O–FeO–MgO–Al2O3–SiO2–H2O (NCKFMASH). Journal of Metamorphic Geology 19, 139–53.CrossRefGoogle Scholar
White, RW, Powell, R and Holland, TJB (2007) Progress relating to calculation of partial melting equilibria for metapelites. Journal of Metamorphic Geology 25, 511–27.CrossRefGoogle Scholar
Windley, BF (1977) Timing of continental growth and emergence. Nature 270, 426–8.CrossRefGoogle Scholar
Zane, A, Sassi, R and Guidotti, CV (1998) New data on metamorphic chlorite as a petrogenetic indicator mineral, with special regard to greenschist-facies rocks. The Canadian Mineralogist 36, 713–26.Google Scholar