The Columbia supercontinent: Retrospective, status, and a statistical assessment of paleomagnetic poles used in reconstructions

Meert, Joseph G.; Santosh, M.

doi:10.1016/j.gr.2022.06.014

Cited by 17 publications

(6 citation statements)

References 168 publications

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“…2016; Wang et al . 2019; Meert & Santosh, 2022). A large number of literatures are available regarding the position of Indian subcontinent within the Columbia supercontinent.…”

Section: Discussionmentioning

confidence: 99%

“…On the basis of previous literatures, it can be deduced that Columbia supercontinent assembled during 1900-1600 Ma and fragmented at around 1500-1200 Ma (Evans, 2013). An even wider time span for tectonic history of the Columbia supercontinent, that is, ca 2100-1800 Ma for its amalgamation, 1800-1600 Ma for intracontinental rifting and 1300-1200 Ma for break-up, have been considered (Saha et al 2016;Wang et al 2019;Meert & Santosh, 2022) Australia, and Pisarevsky et al (2013) have positioned India next to the Sarmatia margin of Baltica. Thus, India's position in Columbia reconstructions has largely remained dubious due to inadequate geological and geochronological data.…”

Section: D Geodynamic Implicationsmentioning

confidence: 99%

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Geochemical constraints on the petrogenesis of mafic rocks (metadolerites) from the Proterozoic Shillong Basin, Northeast India: implications for growth of the Greater Indian Landmass

et al. 2023

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The Paleo-Mesoproterozoic Shillong Basin of the Assam-Meghalaya Gneissic Complex is exposed in parts of Northeast India. The studied metadolerites are from the volcano-sedimentary sequence of Shillong Basin from the Borjuri area in the Mikir Massif. This episode of mafic magmatism can be correlated with the Columbia supercontinent formation and bears significance to its reconstruction. The present work discusses the field, petrography and geochemical characteristics of the metadolerites, which occur in close association with the quartzites of the Shillong Group of rocks (metasedimentary rocks of the Shillong Basin). Our data show distinctive characteristics of subduction-related magmatism exhibiting high LREE/HREE, large ion lithophile element/high field strength element ratios and pronounced negative Nb anomaly. Elemental ratios such as Zr/Ba (0.21–0.46), La/Nb (1.23–2.32) and Ba/Nb (30.08–56.90) point to a fluid-enriched lithospheric mantle source in a subduction regime. Metadolerites plot in the field of ‘back-arc basin basalts’ in tectonic discrimination diagrams reinforcing a subduction zone tectonic setting. The mafic rocks correspond to a 6–10 % partial melting of a mantle source incorporating spinel+garnet lherzolite. The metamorphic P-T of the metadolerites estimated from plagioclase-hornblende geothermobarometer (7–8 kbar, 664 °C) is indicative of amphibolite facies metamorphism in a medium P-T zone. Based on the comparative analysis of field observation, petrography, geochemistry and geological ages given by previous workers, we infer that the Shillong Basin represents a back-arc rift region and is the eastern continuation of the Bathani volcano-sedimentary sequence of the Chotanagpur Granite Gneiss Complex marking continuation of the Central Indian Tectonic Zone to the Mikir Massif.

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“…2016; Wang et al . 2019; Meert & Santosh, 2022). A large number of literatures are available regarding the position of Indian subcontinent within the Columbia supercontinent.…”

Section: Discussionmentioning

confidence: 99%

Section: D Geodynamic Implicationsmentioning

confidence: 99%

Geochemical constraints on the petrogenesis of mafic rocks (metadolerites) from the Proterozoic Shillong Basin, Northeast India: implications for growth of the Greater Indian Landmass

et al. 2023

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“…The formation of collisional belts during 2.0–1.8 Ga on the globe is regarded as an important event that led to the amalgamation of the Columbia supercontinent (Meert, 2012; Meert & Santosh, 2017, 2022; Rogers & Santosh, 2002; Zhao et al, 2005; Zhao, Wilde, et al, 2002). The Palaeoproterozoic collision event along the TNCO has been proposed to mark the incorporation of the North China Craton into the Columbia supercontinent (Kusky et al, 2016; Santosh, 2010; Tang et al, 2022; Tang & Santosh, 2018b; Trap et al, 2012; Zhao et al, 2005, 2011; Zhao, Cawood, et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, the reconstruction model of the Columbia supercontinent also remains controversial, and most researchers believe that it has been amalgamated at 1.8 Ga based on the geological records of collision belts on the globe (Evans & Mitchell, 2011;Meert & Santosh, 2022;Rogers & Santosh, 2002;Zhao, Pang, et al, 2019). Therefore, the study of the TNCO, which marks the incorporation of the North China Craton into the Columbia supercontinent (Santosh, 2010;Tang & Santosh, 2018b;, is helpful to provide new insights for the reconstruction of the Columbia supercontinent.…”

Section: Introductionmentioning

confidence: 99%

“…However, the continent–continent collisional event along the TNCO has been proposed to have occurred at ~1.95 Ga, 1.96–1.90 Ga, or ~1.85 Ga (Chen et al, 2020; Qian et al, 2017; Tang et al, 2017, 2022; Wei, 2018; Wei et al, 2014). Moreover, the reconstruction model of the Columbia supercontinent also remains controversial, and most researchers believe that it has been amalgamated at ~1.8 Ga based on the geological records of collision belts on the globe (Evans & Mitchell, 2011; Meert & Santosh, 2022; Rogers & Santosh, 2002; Zhao, Cawood, et al, 2002; Zhao, Pang, et al, 2019). Therefore, the study of the TNCO, which marks the incorporation of the North China Craton into the Columbia supercontinent (Santosh, 2010; Tang & Santosh, 2018b; Zhao, Cawood, et al, 2002), is helpful to provide new insights for the reconstruction of the Columbia supercontinent.…”

Section: Introductionmentioning

confidence: 99%

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Metamorphic evolution of garnet amphibolites from the Fuping Complex: Implications for the Paleoproterozoic subduction–collision history of the Trans‐North China Orogen

Wang,

Tang,

Santosh

et al. 2023

Geological Journal

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The Trans‐North China Orogen (TNCO) is a major Palaeoproterozoic collisional orogen in the North China Craton and has experienced complex tectonic evolution during the assembly of the Eastern and Western Blocks. The vestiges of subducted oceanic crust preserved in this orogen can be used to gain insights into the subduction–collision process associated with the Palaeoproterozoic orogeny. In this study, we investigate garnet amphibolites from the Wanzi Group in the Fuping Complex along the TNCO through integrated petrography, mineral chemistry, phase equilibrium modelling and zircon U–Pb geochronology. Three stages of metamorphic mineral assemblages are identified as follows: (i) the prograde assemblage is preserved as plagioclase, amphibole, biotite and quartz inclusions in garnet porphyroblasts; (ii) the peak mineral assemblage includes coarse‐grained amphibole, garnet, plagioclase, ilmenite, biotite and quartz; and (iii) the retrograde assemblage is mainly represented by the corona of amphibole, plagioclase and biotite in the matrix. Petrological features and phase equilibrium modelling define a clockwise pressure–temperature path involving a prograde stage of 7.2–9.6 kbar and <670°C, peak conditions of 10.0–10.2 kbar and 690–810°C, and a retrograde stage with near‐isothermal decompression to ~7.4 kbar and cooling. Zircon U–Pb dating shows weighted mean ages of 1848 ± 22 Ma and 1836 ± 31 Ma, representing the growth of zircon in the retrograde stage during the uplift and cooling process. In combination with available data from the TNCO, the post‐peak decompression and cooling process is inferred to be long‐lived during 1.90–1.76 Ga, following collision along the TNCO that occurred during 1.97–1.90 Ga, ultimately leading to the final assembly of the North China Craton.

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Mineral Systems, Earth Evolution, and Global Metallogeny

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The Columbia supercontinent: Retrospective, status, and a statistical assessment of paleomagnetic poles used in reconstructions

Cited by 17 publications

References 168 publications

Geochemical constraints on the petrogenesis of mafic rocks (metadolerites) from the Proterozoic Shillong Basin, Northeast India: implications for growth of the Greater Indian Landmass

Geochemical constraints on the petrogenesis of mafic rocks (metadolerites) from the Proterozoic Shillong Basin, Northeast India: implications for growth of the Greater Indian Landmass

Metamorphic evolution of garnet amphibolites from the Fuping Complex: Implications for the Paleoproterozoic subduction–collision history of the Trans‐North China Orogen

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