Contemporaneous assembly of Western Gondwana and final Rodinia break-up: Implications for the supercontinent cycle

Oriolo, Sebastián; Oyhantçabal, Pedro; Wemmer, Klaus; Siegesmund, Siegfried

doi:10.1016/j.gsf.2017.01.009

Cited by 137 publications

(43 citation statements)

References 141 publications

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“…Formation of supercontinents and their breakup seem to have been cyclic through Earth's history (e.g., Nance et al, 1988Nance et al, , 2014Rogers & Santosh, 2022;Zhao et al, 2004;Oriolo et al, 2017;. Among the several supercontinents recognized, Pangea (~ 250 Ma) and Rodinia (~ 800 Ma) are best studied and understood to have included almost all the landmasses on Earth (Li et al, 2009;Torsvik, 2003;Zhao et al, 2018;Fig.…”

Section: Introductionmentioning

confidence: 99%

On the cause of continental breakup: A simple analysis in terms of driving mechanisms of plate tectonics and mantle plumes

Niu

2020

Journal of Asian Earth Sciences

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Section: Introductionmentioning

confidence: 99%

On the cause of continental breakup: A simple analysis in terms of driving mechanisms of plate tectonics and mantle plumes

Niu

2020

Journal of Asian Earth Sciences

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“…Pan‐African orogeny has been divided into two parts, namely, circa 870 to 630 Ma, which is characterized by terrane accretion as seen in Arabian‐Nubian shield, and 630 to 540 Ma, which shows collision and escape tectonics in many parts of East African orogen (Fritz et al, ; Kröner & Stern, ; Stern, ). Another interpretation was that the Pan‐African orogeny belongs to <650 Ma (Oriolo et al, ). In these perspectives, the South Delhi orogeny could be part of early part of Pan‐African orogeny or it is transitional between Grenvillian and Pan‐African orogeny.…”

Section: Discussionmentioning

confidence: 99%

Dynamics, EPMA Th‐U‐Total Pb Monazite Geochronology and Tectonic Implications of Deformational Fabric in the Lower‐Middle Crustal Rocks: A Case Study of Ambaji Granulite, NW India

Tiwari

Biswal

2019

Tectonics

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Strain fabric and monazite microstructure were studied and dated by Electron Probe Microanalyser (EPMA) in situ Th‐U‐total Pb monazite geochronology in the Ambaji granulite, South Delhi terrane, NW India. The Ambaji granulite comprises pelitic, calcareous, and mafic granulites with several phases of granite intrusions, G0‐3. The granulites were deformed by three phases of folding, F1–3, during South De lhi orogeny and marked by a subhorizontal pervasive fabric, S1, axial planar to isoclinal‐recumbent F1 folds that developed during granulite facies metamorphism. S1 is overprinted by discrete sets of subvertical shear zones associated with a mylonitic fabric, S2, that were developed axial planar to NE‐SW striking upright F2 folds and facilitated exhumation of granulite facies rocks to the upper crust. The shear zones show early history of high‐temperature thrust sense shear and late stage low‐temperature sinistral shear. The NW‐SE striking F3 folds also affected the granulite facies rocks resulting in interference patterns and variations in regional structural trends. Brittle strike slip, and normal fault (Sf fabric) that developed post F3, led the final exhumation of the granulite facies rocks to the surface. The S1 monazites are Y‐depleted and recrystallized through dislocation creep, and the S2‐Sf monazites are Y‐enriched and recrystallized through dissolution‐precipitation creep. Different monazite population yielded distinct ages of circa 875‐857, 834‐778, and 764‐650 Ma for S1, S2, and Sf strain, respectively, indicating that the South Delhi orogeny spanned 875‐650 Ma overlapping with the early phase of the Pan‐African orogeny or representing a transition between Grenvillian and Pan‐African orogeny.

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“…Consequently, we assumed that the west and east Iapetus and Tornquist oceans between west Gondwana, Laurentia, and Baltica had not yet opened at 615 Ma. At 615 Ma, most of the blocks constituting the central Gondwana (Sao Francisco, Congo, Rio de la Plata, Arabia-Nubia shield, Sahara, and Hoggar) are already accreted (Oriolo et al, 2017, and references there in). The paleomagnetic poles from west Gondwana, Laurentia, and Baltica (AD, LR, and ED, respectively, in Figure 1b and Table 1) are also consistent with this assumption.…”

Section: Paleogeographic Model For the Ediacaranmentioning

confidence: 99%

True Polar Wander: A Key Indicator for Plate Configuration and Mantle Convection During the Late Neoproterozoic

Robert

Greff-Lefftz

Besse

2018

Geochem Geophys Geosyst

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Large polar motions are observed in the apparent polar wander paths of several continents during the Ediacaran. Among various hypotheses proposed in the literature, one consists of the occurrence of two successive fast and large true polar wander (TPW) episodes, from 615 to 590 Ma and then between 575 and 565 Ma. In this study, we explored the effect of the reactivation of a girdle of subduction to produce such TPW. First, we performed a reconstruction of the main continents between 615 and 520 Ma including Laurentia, Baltica, west and central Gondwana, and Australia‐Antarctica. We then implemented this paleogeography into a simple mantle dynamic model to calculate the TPW during the Ediacaran. Our results show that the reactivation of a girdle of subduction surrounding the continents along with a reduced effect of the return flow rising from the lower mantle can produce two TPW episodes consistent with the paleomagnetic observations. This mechanism is possible if the sinking velocities associated with the girdle of subduction drastically decrease between 635 and 730 Ma. Such a large geodynamic event is consistent with the detrital zircon age distribution of the Neoproterozoic supporting a low subduction activity during the Cryogenian and a boost during the Ediacaran. Decrease of subduction‐related stress induced on the lithosphere may have interrupted the rifting of the supercontinent Rodinia for 100 Ma. Finally, the weakening in subduction magmatism might have strongly reduced the CO2 flux into the atmosphere and played a major role in driving the Neoproterozoic global‐scale glaciations.

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Contemporaneous assembly of Western Gondwana and final Rodinia break-up: Implications for the supercontinent cycle

Cited by 137 publications

References 141 publications

On the cause of continental breakup: A simple analysis in terms of driving mechanisms of plate tectonics and mantle plumes

On the cause of continental breakup: A simple analysis in terms of driving mechanisms of plate tectonics and mantle plumes

Dynamics, EPMA Th‐U‐Total Pb Monazite Geochronology and Tectonic Implications of Deformational Fabric in the Lower‐Middle Crustal Rocks: A Case Study of Ambaji Granulite, NW India

True Polar Wander: A Key Indicator for Plate Configuration and Mantle Convection During the Late Neoproterozoic

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