Multiple tectonometamorphic imprints in the lower crust: first evidence of<i>ca</i>. 950 Ma (zircon U‐Pb SHRIMP) compressional reworking of UHT aluminous granulites from the Eastern Ghats Belt, India

Das, Kaushik; Bose, Sankar; Karmakar, Subrata; Dunkley, Daniel J.; Dasgupta, Somnath

doi:10.1002/gj.1246

Cited by 81 publications

(59 citation statements)

References 88 publications

(116 reference statements)

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“…Location Studies 2 Pikwitonei granulite terrane/Sipiwesk Lake, Canada Kooijman et al (2012) 9 Lewisian Complex, Mainland Scotland ; Johnson et al (2012); Zirkler et al (2012) 10 Rogaland Anorthosite Complex, Norway Drüppel et al (2013) 11 Bamble Sector, Norway Kihle et al (2010) 12 Gruf Complex, Italy Galli et al (2011Galli et al ( , 2012 Central Kola Granulite-Gneiss area (Kola Peninsula, Russia) Dolivo-Dobrovol'skii et al (2013) 14 KurskeBesedino block, Voronezh Crystalline Massif, Russia Pilugin et al (2009) 18 North China Craton, China Santosh et al (2007aSantosh et al ( , 2009bSantosh et al ( , 2012Santosh et al ( , 2013; Liu et al (2010Liu et al ( , 2011Liu et al ( , 2012; Peng et al (2010); ; Jiao et al ( , 2013a; ; Guo et al (2012); Wan et al (2013); Yang et al (2014) 19 Odesan area (Gyeonggi Massif), South Korea Oh and Kusky (2007) 20 Higo metamorphic terrane, Japan Osanai et al (1998Osanai et al ( , 2006; Oh and Kusky (2007) 21 Kontum Massif, central Vietnam Nakano et al (2007a,b, 2013 Eastern Ghats Province, India Bose et al (2006); Bose and Das (2007); Das et al (2011); Dharma Rao and Chmielowski (2011); Korhonen et al (2011Korhonen et al ( , 2013aKorhonen et al ( ,b, 2014; Dharma Rao et al (2012) 22 Eastern Ghats belt (Ongole Domain of Krishna Province) ; …”

Section: Nomentioning

confidence: 98%

“…The combined or integrated Ca content of ternary feldspar (mesoperthite) has also been widely used to either independently identify or circumstantially support extreme thermal conditions in metasedimentary granulites (Sandiford, 1985a;Pilugin et al, 2009;Santosh et al, 2009c;Das et al, 2011;Jöns and Schenk, 2011;Belyanin et al, 2012b;Guo et al, 2012;Liu et al, 2012;Ague et al, 2013;. More recently, the trace element concentration of Zr in rutile and Ti in zircon and quartz have been proposed as thermometers (Zack et al, 2004;Watson and Harrison, 2005;Wark and Watson, 2006;Watson et al, 2006;Ferry and Watson, 2007;Tomkins et al, 2007;Fu et al, 2008;Kawasaki and Osanai, 2008;Thomas et al, 2010;Huang and Audétat, 2012;Hofmann et al, 2013), and these have been applied to UHT granulites with mixed success (Baldwin et al, 2007a;Baldwin and Brown, 2008;Clark et al, 2009;Liu et al, 2010;Kawasaki et al, 2011;Ague and Eckert, 2012;Altenberger et al, 2012;Kooijman et al, 2012;Liu et al, 2012;Ague et al, 2013;.…”

Section: Mineral Chemistrymentioning

confidence: 99%

“…Berg and Wheeler, 1976;Berg, 1977;Caporuscio and Morse, 1978;Kars et al, 1980;Arima and Gower, 1991;Dasgupta et al, 1997;Westphal et al, 2003;Peng et al, 2010;Kooijman et al, 2011;Guo et al, 2012;Mitchell et al, 2014), as well as on a regional scale (e.g. Ellis et al, 1980;Grew, 1980;Sheraton et al, 1980;Grew, 1982b;Lal et al, 1987;Dasgupta et al, 1994;Brown and Raith, 1996;Ouzegane and Boumaza, 1996;Sengupta et al, 1999;Hollis and Harley, 2002;Sarkar et al, 2003a;Schmitz and Bowring, 2003;Bose and Das, 2007;Braun et al, 2007;Harley and Kelly, 2007a;Brandt et al, 2011;Das et al, 2011;Smithies et al, 2011;Adjerid et al, 2013;Korhonen et al, 2013a;Collins et al, 2014;Walsh et al, 2014). Extensive exposures of UHT granulites are an exciting phenomenon as they imply that Earth's crust is mechanically capable of attaining and tolerating extreme thermal conditions on a regional scale (Harley, 2004), perhaps during 'normal' tectonic events (e.g.…”

Section: Introductionmentioning

confidence: 97%

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On ultrahigh temperature crustal metamorphism: Phase equilibria, trace element thermometry, bulk composition, heat sources, timescales and tectonic settings

Kelsey

Hand

2015

Geoscience Frontiers

376

285

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a b s t r a c tUltrahigh temperature (UHT) metamorphism is the most thermally extreme form of regional crustal metamorphism, with temperatures exceeding 900 C. UHT crustal metamorphism is recognised in more than 50 localities globally in the metamorphic rock record and is accepted as 'normal' in the spectrum of regional crustal processes. UHT metamorphism is typically identified on the basis of diagnostic mineral assemblages such as sapphirine þ quartz, orthopyroxene þ sillimanite AE quartz and osumilite in MgeAlrich rock compositions, now usually coupled with pseudosection-based thermobarometry using internally-consistent thermodynamic data sets and/or Al-in-Orthopyroxene and ternary feldspar thermobarometry. Significant progress in the understanding of regional UHT metamorphism in recent years includes: (1) development of a ferric iron activityecomposition thermodynamic model for sapphirine, allowing phase diagram calculations for oxidised rock compositions; (2) quantification of UHT conditions via trace element thermometry, with Zr-in-rutile more commonly recording higher temperatures than Ti-in-zircon. Rutile is likely to be stable at peak UHT conditions whereas zircon may only grow as UHT rocks are cooling. In addition, the extent to which Zr diffuses out of rutile is controlled by chemical communication with zircon; (3) more fully recognising and utilising temperature-dependent thermal properties of the crust, and the possible range of heat sources causing metamorphism in geodynamic modelling studies; (4) recognising that crust partially melted either in a previous event or earlier in a long-duration event has greater capacity than fertile, unmelted crust to achieve UHT conditions due to the heat energy consumed by partial melting reactions; (5) more strongly linking UePb geochronological data from zircon and monazite to PeT points or path segments through using Y þ REE partitioning between accessory and major phases, as well as phase diagrams incorporating Zr and REE; and (6) improved insight into the settings and factors responsible for UHT metamorphism via geodynamic forward models. These models suggest that regional UHT metamorphism is, principally, geodynamically related to subduction, coupled with elevated crustal radiogenic heat generation rates.Ó 2014, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

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Section: Nomentioning

confidence: 98%

Section: Mineral Chemistrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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On ultrahigh temperature crustal metamorphism: Phase equilibria, trace element thermometry, bulk composition, heat sources, timescales and tectonic settings

Kelsey

Hand

2015

Geoscience Frontiers

376

285

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“…1a) records a remarkable Archean growth history (Saha, 1994). Its southern margin is composed of high-grade granulites along with mediumgrade metasedimentary and metavolcanic rocks, collectively termed as the Rengali Province (Crowe et al, 2001(Crowe et al, , 2003Dobmeier and Raith, 2003) that separate the PaleoeMesoarchean granitegreenstone terrane of the SC (e.g., Saha, 1994;Mukhopadhyay et al, 2012) from the essentially high-grade PaleoeMesoproterozoic Eastern Ghats Mobile Belt (EGMB) Das et al, 2011;Korhonen et al, 2011;Gupta, 2012;Dasgupta et al, 2013 and references therein). Although the Rengali Province constitutes a part of the EGMB, its rock types, metamorphic style and isotopic signatures are different from the major part of the EGMB, known as the Eastern Ghats Province or EGP (Dobmeier and Raith, 2003).…”

Section: Introductionmentioning

confidence: 99%

Tectonic juxtaposition of crust and continental growth during orogenesis: Example from the Rengali Province, eastern India

Bose¹,

Guha²,

Ghosh³

et al. 2015

Geoscience Frontiers

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a b s t r a c tThe southern boundary of the Singhbhum Craton witnessed multiple orogenies that juxtaposed thin slice of granulite suite of the Rengali Province against the low-grade granite-greenstone belt of the craton along the EeW trending Sukinda Thrust. The strong southerly dipping mylonitic foliation within the granulites along with the prominent down-dip mineral lineation, suggest a northerly-verging thrusting. Mylonitized charnockite at the contact zone contains enclaves of mafic and ultramafic granulite, whereas granitoid gneiss contains enclaves of pelitic granulite. Mafic granulite enclaves preserve an early (S 1M ) foliation that formed during D 1M deformation. This rock, along with the host charnockite, were intensely deformed by the D 2M thrusting event and resulting S 2M foliation development in both rock suites. Geothermobarometric and pseudosection analyses show that the garnet-clinopyroxene-plagioclaseorthopyroxene-ilmenite-quartz assemblage in mafic granulite was stabilized at high-pressure and temperature conditions (10À12 kbar, 860 C) and was overprinted by a fine-grained assemblage of clinopyroxene-plagioclase AE hornblende that developed during decompression (down to 5.5e7.5 kbar). Matrix hornblende shows incipient breakdown to garnet-clinopyroxene-quartz intergrowth due to a granulite facies reworking. A contrasting P-T history is preserved in the pelitic granulite. The peak assemblage garnet-orthopyroxene-cordierite-quartz-rutile was stabilized at w6.0 kbar, 730 C which resulted from heating of the mid crust magma during the D 2M thrusting. The contrasting P-T histories could result from the tectonic juxtaposition of lower-and mid-crustal section during the D 2M event. Evidences of an early orogenic imprint within the mafic granulite imply involvement of deep continental crust during southward growth of the Singhbhum Craton.Ó 2014, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/3.0/).

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“…Das et al (2011) examine a suite of UHT granulites from the central part of EGB in an integrated structural, petrological and geochronological study. They document metamorphic conditions of ca.…”

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Preface: Extreme metamorphism and continental dynamics

Santosh

2011

Geological Journal

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The formation, exhumation and distribution of ultrahighpressure (UHP), high-pressure (HP) and ultrahigh-temperature (UHT) metamorphic orogens in convergent plate margins have important implications in understanding the dynamics of the continental crust, as well as the assembly and dispersion of continental fragments on the globe. Crustal metamorphism at extreme pressure-temperature (P-T) conditions generates characteristic UHP, HP and UHT mineral assemblages. The petrologic, phase equilibria, geochemical, structural and geochronologic studies of these rocks are important in understanding the history of the continental crust in the evolving Earth. This Special Issue of Geological Journal assembles ten selected contributions on this topic, covering the various aspects of extreme metamorphism in relation to continental dynamics.The first four contributions in this Special Issue relate to ultrahigh-pressure processes. In the opening paper, Massonne (2011) present results from phase equilibria studies based on pseudosection analysis on siliceous marbles which were subjected to ultrahigh pressure (UHP) conditions. The study focuses on siliceous calcite-dolomite marble from the Kokchetav Massif, Kazakhstan and a dolomite marble from the UHP unit of the Sulu terrane, China. The results show that lawsonite-clinopyroxene (T < 7508C) and garnet-clinopyroxene (T > 7008C) are the typical assemblages of UHP siliceous marbles. The XCO 2 of the mixed H 2 O-CO 2 fluid phase, coexisting with UHP siliceous marbles, increases with rising T and shows low values at UHP and T < 8008C. The results are consistent with the metamorphic conditions estimated in previous studies. The study demonstrates the application of the pseudosection technique to deduce the metamorphic history of UHP carbonate rocks.Palmeri et al. (2011) address the high-to ultrahighpressure (HP/UHP) rocks from the northern Victoria Land, Antarctica -a Palaeozoic fold belt formed at the palaeo-Pacific margin of Gondwana. The mafic and ultramafic rocks occurring within a metasedimentary sequence of gneisses and quartzites are exposed at the Lanterman Range. Geological, petrological and geochronological data suggest that the mafic, ultramafic and felsic host rocks underwent a common metamorphic evolution with an UHP eclogite-facies stage at ca. 500 Ma. The estimated metamorphic temperatures are up to 8508C and pressures up to 3.3 GPa, with exhumation characterized by a nearly isothermal path from UHP conditions. This is the only known UHP locality in Antarctica and is therefore significant in addressing the tectonics along the palaeo-Pacific margin of Gondwana.The next paper by Amaral et al. (2011) reports the occurrence and geochemistry of metamafic rocks from the Forquilha Eclogite Zone in NE Brazil. The ca. 30 km-long UHP belt comprises garnet amphibolites, retrograded eclogites and clinopyroxene-garnet amphibolites. In terms of their geochemical characters, the garnet amphibolites are the most depleted rocks and constitute a highly fractionated group, ranging from picr...

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Multiple tectonometamorphic imprints in the lower crust: first evidence ofca. 950 Ma (zircon U‐Pb SHRIMP) compressional reworking of UHT aluminous granulites from the Eastern Ghats Belt, India

Cited by 81 publications

References 88 publications

On ultrahigh temperature crustal metamorphism: Phase equilibria, trace element thermometry, bulk composition, heat sources, timescales and tectonic settings

On ultrahigh temperature crustal metamorphism: Phase equilibria, trace element thermometry, bulk composition, heat sources, timescales and tectonic settings

Tectonic juxtaposition of crust and continental growth during orogenesis: Example from the Rengali Province, eastern India

Preface: Extreme metamorphism and continental dynamics

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