A Rodinian suture in western India: New insights on India-Madagascar correlations

Ishwar-Kumar, C.; Windley, Brian F.; Horie, Kenji; Kato, Takenori; Hokada, Tomokazu; Itaya, Tetsumaru; Yagi, Koshi; Gouzu, Chitaro; Sajeev, K.

doi:10.1016/j.precamres.2013.07.023

Cited by 90 publications

(42 citation statements)

References 100 publications

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“…The Malagasy suture has little or no record of events before 0.53-0.51 Ga metamorphism, leading to many interpretations for its early history including a reworked Archean suture in the greater Dharwar Craton (Tucker et al, 2011a;Brandt et al, 2014), a two-stage suture closing at 0.74-0.63 Ga in the south and 0.53-0.51 Ga in the north , a diachronous suture closing progressively southwards between~1.38 and 0.75 Ga (Ishwar-Kumar et al, 2013) and a suture that closed at 0.53-0.51 Ga during terminal collision with no earlier history (Collins and Pisarevsky, 2005). Based on metamorphism and magmatism elsewhere in the orogen, it is likely to have closed before~0.65 Ga collision at the Mozambique suture.…”

Section: Discussionmentioning

confidence: 99%

Pan–African granulites of Madagascar and southern India: Gondwana assembly and parallels with modern Tibet

Fitzsimons

2016

Journal of Mineralogical and Petrological Sciences

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Granulites of the southern East African Orogen formed by continental collision during Gondwana assembly. The highest metamorphic gradients of 25-50°C km −1 were attained at 0.58-0.53 Ga in a microcontinental block that was sandwiched between two collisional sutures and is now exposed in Madagascar and southern India. The 50 Myr duration of extreme pressure-temperature (P-T) conditions and lack of coeval mantle magmatism suggest that metamorphism was driven by radiogenic heat accumulation beneath a long-lived orogenic plateau. Bounding sutures most likely record transfer of this microcontinent across the Neoproterozoic Mozambique Ocean, analogous to Gondwanan terranes that crossed Tethys before final India-Asia collision and, like Tibet, these sutures mark the edges of a plateau that formed following terminal ocean closure and collision. Both sutures record moderate metamorphic gradients of 15-25°C km −1 but with quite different ages. Metamorphism along the western suture at 0.65-0.61 Ga followed the end of magmatism in an adjacent 0.85-0.65 Ga ocean-arc terrane. It has an anti-clockwise P-T path that reflects preferential thickening of the hot arc during early stages of collision, and dates ocean closure at the western suture. Metamorphism along the eastern suture at 0.53-0.51 Ga has a clockwise P-T path and is widely assumed to date terminal collision in the East African Orogen. However, this event was coeval with rapid exhumation of granulites in the adjacent plateau and is more likely to reflect reactivation of a much older eastern suture during plateau collapse. Great care should be taken when using metamorphism to date ocean closure in ancient orogens. Rocks with hot metamorphic gradients give poor age constraints on initial collision because peak T is attained >50 Myr after ocean closure if radioactivity is a major part of the heat budget. Suture zone rocks with moderate metamorphic gradients can provide more reliable estimates for the time of ocean closure but are also prone to later reactivation in orogens with protracted histories.

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Section: Discussionmentioning

confidence: 99%

Pan–African granulites of Madagascar and southern India: Gondwana assembly and parallels with modern Tibet

Fitzsimons

2016

Journal of Mineralogical and Petrological Sciences

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“…According to Collins et al (2003) and others (Collins and Windley 2002;Cox et al 2004;Fitzsimons and Hulscher 2005;Collins 2006), the Neoarchean Antananarivo Block of present-day Figure 1. Juxtaposition of India and Madagascar at 120 Ma and suggested correlation of shear zones and tectonic units, as proposed by Ishwar Kumar et al (2013). The published ages of the crustal units in western India and northcentral Madagascar are shown (age data compiled from Balasubramanian et al 1978;Swami Nath and Ramakrishnan 1981;Naqvi and Rogers 1987;Gupta et al 1988;Agarwal et al 1992;Jayananda et al 1995Jayananda et al , 2000Peaucat et al 1995;Russel et al 1996;Tucker et al 1999bTucker et al , 2011bTucker et al , 2014Chawwick et al 2000;Paquette et al 2003;Ghosh et al 2004;French and Heaman 2010;Schofield et al 2010;Ishwar Kumar et al 2013;Rekha et al 2013).…”

Section: Introductionmentioning

confidence: 57%

“…Juxtaposition of India and Madagascar at 120 Ma and suggested correlation of shear zones and tectonic units, as proposed by Ishwar Kumar et al (2013). The published ages of the crustal units in western India and northcentral Madagascar are shown (age data compiled from Balasubramanian et al 1978;Swami Nath and Ramakrishnan 1981;Naqvi and Rogers 1987;Gupta et al 1988;Agarwal et al 1992;Jayananda et al 1995Jayananda et al , 2000Peaucat et al 1995;Russel et al 1996;Tucker et al 1999bTucker et al , 2011bTucker et al , 2014Chawwick et al 2000;Paquette et al 2003;Ghosh et al 2004;French and Heaman 2010;Schofield et al 2010;Ishwar Kumar et al 2013;Rekha et al 2013). A major part of the Peninsular Indian basement along the Konkan coast is covered and hidden by volcanic rocks of the Deccan Traps, making reliable correlations with Madagascar difficult.…”

Section: Introductionmentioning

confidence: 57%

“…120 Ma (e.g., Katz and Premoli 1979;Collins and Windley 2002;Meert 2003;O'Neill et al 2003;Ishwar Kumar et al 2013) just before their rifting juxtaposes the Antongil Block of Madagascar against the late Cretaceous to Paleocene (Lightfoot et al 1987;Vandamme et al 1991;Sheth et al 2001;Mahoney et al 2002;Pande 2002) Deccan Traps of India ( fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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The Basement of the Deccan Traps and Its Madagascar Connection: Constraints from Xenoliths

Upadhyay

Kooijman

Singh

et al. 2015

The Journal of Geology

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“…The general fit of these continents is well accepted, but precise correlations among these continental fragments are still debated. The Madagascar-India correlation has been widely discussed in several recent publications (e.g., Tucker et al, 2011aTucker et al, , 2011bIshwar-Kumar et al, 2013;Rekha et al, 2013Rekha et al, , 2014Tucker et al, 2014;Ishwar-Kumar et al, 2015). This discussion has been driven by the increased use of sophisticated analytical techniques leading to an improved understanding of the chronology and evolution of various rock-types.…”

Section: Tectonic Implicationsmentioning

confidence: 99%

UHT granulites of the Highland Complex, Sri Lanka II: Geochronological constraints and implications for Gondwana correlation

Osanai

Sajeev²,

Nakano

et al. 2016

Journal of Mineralogical and Petrological Sciences

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The regional ultrahigh-temperature (UHT) metamorphism of the Highland Complex, Sri Lanka is well established and has an important role in our understanding of the tectonic history of the Gondwana supercontinent. U-Pb zircon dating of sapphirine-bearing Mg-Al granulites yielded two major metamorphic age populations at approximately 620-590 and 563-525 Ma with no evidence of older zircon cores. Pelitic granulite samples with a Grt-Sil-Spl-Crd assemblage have similar metamorphic ages with concordant data clusters at~602, 563, and 526 Ma and inherited zircon cores aged from 2040 to 1600 Ma. The pelitic granulites also underwent two stages of metamorphism (565-520 and 622-580 Ma). Some of these pelitic granulite samples have inherited zircon cores ranging from 3060 to 760 Ma. Zircons in mafic granulite samples have age ranges of 566-533 and 620-578 Ma. A calc-silicate granulite sample also has similar age populations at 591, 541, and 524 Ma. Combining these new results with previously published ages from Sri Lanka and formerly adjacent continental fragments of Gondwana, we propose that the terranes in southern Madagascar (south of Ranotsara Shear Zone), Northern and Southern Madurai and the Trivandrum Blocks of southern India, the Highland Complex of Sri Lanka, and the Skallen Group in the Lützow-Holm Complex of East Antarctica represent a unique metamorphic belt that regionally experienced the Ediacaran-Cambrian UHT event during the amalgamation of the Gondwana supercontinent.

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A Rodinian suture in western India: New insights on India-Madagascar correlations

Cited by 90 publications

References 100 publications

Pan–African granulites of Madagascar and southern India: Gondwana assembly and parallels with modern Tibet

Pan–African granulites of Madagascar and southern India: Gondwana assembly and parallels with modern Tibet

The Basement of the Deccan Traps and Its Madagascar Connection: Constraints from Xenoliths

UHT granulites of the Highland Complex, Sri Lanka II: Geochronological constraints and implications for Gondwana correlation

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