India's changing place in global Proterozoic reconstructions: A review of geochronologic constraints and paleomagnetic poles from the Dharwar, Bundelkhand and Marwar cratons

Pradhan, Vimal R.; Meert, Joseph G.; Pandit, Manoj K.; Kamenov, George D.; Gregory, L. C.; Malone, Shawn J.

doi:10.1016/j.jog.2009.11.008

Cited by 113 publications

(28 citation statements)

References 121 publications

(181 reference statements)

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“…Poles assigned to the 1.2e1.0 Ga interval relevant to this transition are highlighted in Table 3. Poles from India (Malone et al, 2008;Pradhan et al, 2010) conform reasonably well to APWP defined elsewhere using the 'B' configuration with the exception of the result from the younger Anantapur dykes (1027 AE 13 Ma). Possible correlations of Australian data (e.g.…”

Section: Tablesupporting

confidence: 73%

Continental velocity through Precambrian times: The link to magmatism, crustal accretion and episodes of global cooling

Piper

2013

Geoscience Frontiers

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a b s t r a c tQuasi-integrity of continental crust between Mid-Archaean and Ediacaran times is demonstrated by conformity of palaeomagnetic poles to near-static positions between w2.7e2.2 Ga, w1.5e1.2 Ga and w0.75e0.6 Ga. Intervening data accord to coherent APW loops turning at "hairpins" focused near a continental-centric location. Although peripheral adjustments occurred during Early Proterozoic (w2.2 Ga) and Grenville (w1.1 Ga) times, the crust retained a low order symmetrical crescent-shaped form constrained to a single global hemisphere until break-up in Ediacaran times. Conformity of palaeomagnetic data to specific Eulerian parameters enables definition of a master Precambrian APW path used to estimate the root mean square velocity (v RMS ) of continental crust between 2.8 and 0.6 Ga. A long interval of little polar movement between w2.7 and 2.2 Ga correlates with global magmatic shutdown between w2.45 and 2.2 Ga, whilst this interval and later slowdown at w0.75e0.6 Ga to velocities of <2 cm/year correlate with episodes of widespread glaciation implying that these prolonged climatic anomalies had an internal origin; the reduced input of volcanically-derived atmospheric greenhouse gases is inferred to have permitted freeze-over conditions with active ice sheets extending into equatorial latitudes as established by low magnetic inclinations in glaciogenic deposits. v RMS variations through Precambrian times correspond to the distribution of U-Pb ages in orogenic granitoids and detrital zircons and demonstrate that mobility of continental crust has been closely related to crustal tectonism and incrementation. Both periods of near-stillstand were followed by rapid v RMS recording massive heat release from beneath the continental lid at w2.2 and 0.6 Ga. The first coincided with the Lomagundi-Jatuli isotopic event and led to prolonged orogenesis accompanied by continental flooding and reconfiguration of the crust on the Earth's surface; the second led to continental break-up and instigated the comprehensive Plate Tectonics that has characterised Phanerozoic times. The Mesoproterozoic interval characterised by anorogenic magmatism correlates with low v RMS between w1.5 and 1.1 Ga. Insulation of the sub-continental mantle evidently permitted high temperature melting and weakening of the crustal lid to enable buoyant emplacement of large plutons at high crustal levels during this magmatic event unique to Mesoproterozoic and early Neoproterozoic times.Ó 2012, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

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Section: Tablesupporting

confidence: 73%

Continental velocity through Precambrian times: The link to magmatism, crustal accretion and episodes of global cooling

Piper

2013

Geoscience Frontiers

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“…Moreover, the petrochemical features of the amphibolites reported in this study are comparable to those of Neoproterozoic mafic intrusive rocks from the Seychelles, Andriamena region of north-central Madagascar, and Malani Igneous Suite of northwest India (Tucker et al, 2001;Gregory et al, 2009;Bybee et al, 2010;Pradhan et al, 2010). Thus, we propose that the Seychelles, Madagascar and Lhasa terranes were adjacent to the western and northern margins of Greater India, in a slightly revised configuration of Rodinia supercontinent as proposed by Torsvik et al (1996), Meert and Torsvik (2003), Rino et al (2008) and Bybee et al (2010).…”

Section: Tectonic Implicationssupporting

confidence: 72%

Late Neoproterozoic thermal events in the northern Lhasa terrane, south Tibet: Zircon chronology and tectonic implications

Dong

Zhang

Santosh

et al. 2011

Journal of Geodynamics

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“…Precise geochronologic and paleomagnetic studies in some Precambrian terranes have helped in constraining the paleogeographic position of various crustal blocks within different supercontinental assemblies (e.g. Pradhan et al, 2010;Piper, 2010-b). Remnants of the ocean basins that opened during the disruption of former supercontinents which were incorporated during the assembly of subsequent landmasses have also been described from Precambrian terranes.…”

Section: Supercontinent Assembly and Mantle Dynamicsmentioning

confidence: 99%

A synopsis of recent conceptual models on supercontinent tectonics in relation to mantle dynamics, life evolution and surface environment

Santosh

2010

Journal of Geodynamics

135

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India's changing place in global Proterozoic reconstructions: A review of geochronologic constraints and paleomagnetic poles from the Dharwar, Bundelkhand and Marwar cratons

Cited by 113 publications

References 121 publications

Continental velocity through Precambrian times: The link to magmatism, crustal accretion and episodes of global cooling

Continental velocity through Precambrian times: The link to magmatism, crustal accretion and episodes of global cooling

Late Neoproterozoic thermal events in the northern Lhasa terrane, south Tibet: Zircon chronology and tectonic implications

A synopsis of recent conceptual models on supercontinent tectonics in relation to mantle dynamics, life evolution and surface environment

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