Palaeopangaea in Meso-Neoproterozoic times: The palaeomagnetic evidence and implications to continental integrity, supercontinent form and Eocambrian break-up

Piper, J. D. A.

doi:10.1016/j.jog.2010.04.004

Cited by 22 publications

(21 citation statements)

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“…The conformity of Proterozoic palaeomagnetic data to a single APW between Mid-Archaean and Ediacaran times is described in detail elsewhere (Piper, 2007(Piper, , 2010a and is summarised here in Figs. 2e7.…”

Section: Palaeopangaean Reconstruction Parametersmentioning

confidence: 90%

“…1 as derived from Eulerian rotations summarised in Table 1 after Piper (2007Piper ( , 2010a with some refinements amplified elsewhere (Piper, in press) that incorporate data from South American cratons (e.g. D' Agrella-Filho et al, 1984, Tarim (Chen et al, 2004;Huang et al, 2005) and Antarctica (Jones et al, 2003).…”

Section: Palaeopangaean Reconstruction Parametersmentioning

confidence: 99%

“…Prolonged intervals of little or no polar movement are recognised between w2.7e2.2, 1.5e1.2 and 0.75e0.6 Ga, whilst the bulk of the intervening data conform to APW loops radiating from a continental-centric position. Because this conformity is evident through imperfections of the database (Piper, 1982(Piper, , 2010a, it demonstrates that palaeomagnetic data are of more interpretative value than widely appreciated. It highlights a style of tectonics that is markedly different from the Plate Tectonics that has operated during Phanerozoic times.…”

Section: Introductionmentioning

confidence: 98%

“…In general terms this uniformitarian approach is flawed because it fails to accommodate the much lower rates of lunar recession in Proterozoic times, and contrasting (Korenaga, 2006) and episodic (Silver and Behn, 2008;Condie et al, 2009a, b) heat release from the Earth's interior, presumably at much lower levels to avoid "thermal catastrophe" in Mid-Proterozoic times (Davies, 1980;Korenaga, 2003). In specific terms it fails to explain why unique shield reconstructions repeatedly configure palaeomagnetic poles into a single APWP over intervals in excess of 2 Ga (Piper, 1982(Piper, , 2007(Piper, , 2010a and why there is an anomalous concentration of Proterozoic magnetic inclinations into low values (Kent and Smethurst, 1998); the Palaeopangaean solution identifies this latter anomaly as a sampling bias and not due to unrealistic departures from a Geocentric Axial Dipole (GAD) source which would otherwise frustrate the use of palaeomagnetic data for resolving Precambrian palaeogeography (Piper, 2010b).…”

Section: Introductionmentioning

confidence: 99%

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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: Palaeopangaean Reconstruction Parametersmentioning

confidence: 90%

Section: Palaeopangaean Reconstruction Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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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 radical revision to its palaeogeography was proposed (Evans 2009). All the while, Piper (2000Piper ( , 2007 continued to espouse his alternative 'Palaeopangaea' model, largely unchanged since its original inception in the 1970s but beginning to incorporate modest mobility to accommodate discordant palaeomagnetic data (Piper 2010). Exclusion of Gondwanan cratons was partly based on a consistently high-palaeolatitude location of Congo-São Francisco during the interval 1080 -1010 Ma, in contrast to the low palaeolatitudes of cratons bordering Laurentia through the same period .…”

Section: Third Cycle: Rodinia To Pannotia/gondwanamentioning

confidence: 99%

Four-dimensional context of Earth's supercontinents

Evans

Murphy

2016

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The supercontinent-cycle hypothesis attributes planetary-scale episodic tectonic events to an intrinsic self-organizing mode of mantle convection, governed by the buoyancy of continental lithosphere that resists subduction during closure of old ocean basins, and consequent reorganization of mantle convection cells leading to opening of new ocean basins. Characteristic timescales of the cycle are typically 500-700 myr. Proposed spatial patterns of cyclicity range from hemispheric (introversion) to antipodal (extroversion), to precisely between those end-members (orthoversion). Advances in our understanding can arise from theoretical or numerical modelling, primary data acquisition relevant to continental reconstructions, and spatiotemporal correlations between plate kinematics, geodynamic events and palaeoenvironmental history. The palaeogeographic record of supercontinental tectonics on Earth is still under development. The contributions in this special publication provide snap-shots in time of these investigations and indicate that Earth's palaeogeographic record incorporates elements of all three endmember spatial patterns.

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The Paleomagnetic Record of the São Francisco-Congo Craton

D’Agrella-Filho

Cordani

2016

Regional Geology Reviews

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Palaeopangaea in Meso-Neoproterozoic times: The palaeomagnetic evidence and implications to continental integrity, supercontinent form and Eocambrian break-up

Cited by 22 publications

References 148 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

Four-dimensional context of Earth's supercontinents

The Paleomagnetic Record of the São Francisco-Congo Craton

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