Protopangaea: Palaeomagnetic definition of Earth's oldest (mid-Archaean-Palaeoproterozoic) supercontinent

Piper, J. D. A.

doi:10.1016/j.jog.2010.01.002

Cited by 48 publications

(29 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Åhäll & Connelly 1998, Anderson & Morrison 1992, Bettencourt et al 1999, Hoffman 1989, Karlstrom et al 2001, Rämö et al 2003, Vigneresse 2005. Piper (2010) proposes that the demise of Columbia occurred through a series of small intracratonic rotations that are consistent with U-Pb ages (and Nd model ages), obtained for rocks between 1200 and 1000 Ma. Such period is characterized by a small peak in the formation of juvenile crust, when compared with periods related to the formation of other supercontinents (Hawkesworth et al 2010).…”

Section: Introductionmentioning

confidence: 56%

“…Rogers 1996, Rogers & Santosh 2002, Zhao et al 2002, 2003, 2004, Meert 2002, Pesonen et al 2003, Hou et al 2008a, 2008b, Johansson 2009, 2014, Yakubchuck 2010, Piper 2010, Evans & Mitchell 2011, Zhang et al 2012. This supercontinent has received different names: NENA (Gower et al 1990), NUNA (Hoffman 1997), Columbia (Rogers & Santosh 2002), or Paleopangea (Piper 2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Paleomagnetism of the Amazonian Craton and its role in paleocontinents

et al. 2016

View full text Add to dashboard Cite

In the last decade, the participation of the Amazonian Craton on Precambrian supercontinents has been clarified thanks to a wealth of new paleomagnetic data. Paleo to Mesoproterozoic paleomagnetic data favored that the Amazonian Craton joined the Columbia supercontinent at 1780 Ma ago, in a scenario that resembled the South AMerica and BAltica (SAMBA) configuration. Then, the mismatch of paleomagnetic poles within the Craton implied that either dextral transcurrent movements occurred between Guiana and Brazil-Central Shield after 1400 Ma or internal rotation movements of the Amazonia-West African block took place between 1780 and 1400 Ma. The presently available late-Mesoproterozoic paleomagnetic data are compatible with two different scenarios for the Amazonian Craton in the Rodinia supercontinent. The first one involves an oblique collision of the Amazonian Craton with Laurentia at 1200 Ma ago, starting at the present-day Texas location, followed by transcurrent movements, until the final collision of the Amazonian Craton with Baltica at ca. 1000 Ma. The second one requires drifting of the Amazonian Craton and Baltica away from the other components of Columbia after 1260 Ma, followed by clockwise rotation and collision of these blocks with Laurentia along Grenvillian Belt at 1000 Ma. Finally, although the time Amazonian Craton collided with the Central African block is yet very disputed, the few late Neoproterozoic/Cambrian paleomagnetic poles available for the Amazonian Craton, Laurentia and other West Gondwana blocks suggest that the Clymene Ocean separating these blocks has only closed at late Ediacaran to Cambrian times, after the Amazonian Craton rifted apart from Laurentia at ca. 570 Ma.

show abstract

Section: Introductionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Paleomagnetism of the Amazonian Craton and its role in paleocontinents

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Primitive positions of Australia, India and south-central Africa follow closely those used hitherto (Piper, 2003) which have aimed to (i) preserve the close proximities of the late Archaean-Early Proterozoic nuclei as defined by common geological histories (e.g. Rogers, 1996;Wingate, 1998;Zegers et al, 1998;Rogers and Santosh, 2004), and (ii) accord with the Late Archaean-Palaeoproterozoic palaeomagnetic evidence (Piper, 2010). The central-southern Africa division comprises the Kaapvaal, Zimbabwe and Tanzania cratonic nuclei with an integral tectonic framework following Kibaran-Iriumide orogeny at ∼1.3-1.1 Ga.…”

Section: Geometrical Elements Of the Reconstructionmentioning

confidence: 75%

“…The configuration of Laurentia and the central-southern African shields sustained since at least 2.6 Ga (Piper, 1982, 2010 is at last spectacularly destroyed as poles from the two regions move into widely divergent parts of the projection in Fig. 6(a).…”

Section: The End Of Palaeopangaea: Continental Break-up Prior To the mentioning

confidence: 99%

“…The continental shape was comparable to the form of the later and shorter-lived Phanerozoic supercontinent Pangaea (referred to hereafter as 'Neopangaea' to distinguish it from earlier but comparable cycles of supercontinent growth). A crustal form of more limited size but comparable shape ("Protopangaea") is also defined from Archaean and early Proterozoic times from the 2.9-2.0 Ga palaeomagnetic data (Piper, 2010). These supercontinents have geometrical forms confined within global hemispheres and perimeters lying near to a great circle (Fig.…”

Section: Geodynamic Implications and Speculationsmentioning

confidence: 99%

See 1 more Smart Citation

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

Piper

2010

Journal of Geodynamics

Self Cite

View full text Add to dashboard Cite

Early Precambrian mafic dyke swarms from the Central Archaean Bastar Craton, India: geochemistry, petrogenesis and tectonic implications

Srivastava

Gautam

2011

Geological Journal

View full text Add to dashboard Cite

The Archaean Bastar craton is known for the presence of different generations of mafic dykes. Less studied many NW-SE trending mafic dykes (intruded into the Archaean supracrustal rocks), encountered from the central part of the Bastar craton, are studied for their petrological and geochemical characteristics. There are many geological evidences which suggest emplacement of these mafic dykes in an intracratonic setting. Two distinct types of mafic dykes are recognized. Petrographically it is difficult to discriminate these two types. Many samples show metamorphic textures and amphibolites facies mineral assemblage but a few samples preserved original igneous texture and mineralogy. Major oxides show sub-alkaline thoeliitic basalt/basaltic andesite nature. High-Fe and high-Mg contents classify them as high-iron and highmagnesium tholeiites. They fall in the gabbronorite field on R1-R2 plot. Geochemical characteristics, particularly high-field strength and rareearth elements, clearly distinguished them into two types: Group 1 and Group 2 mafic dykes. When compared with well-studied mafic dyke swarms of the Southern Bastar craton, the Group 1 is recognized as Meso-Neoarchaean sub-alkaline mafic dykes (BD1-CBC) and the Group 2 as Neoarchaean-Palaeoproterozoic boninite-norite mafic dykes (BN-CBC). The boninite-norite nature of the second group is also corroborated through immobile trace element ratios. BD1-CBC dykes are characterized by a relatively higher concentration of HFSE and REE in comparison to BN-CBC dykes. Some extent of crustal contamination is observed in BN-CBC dykes but BD1-CBC dykes do not show any indication of crustal contamination. Trace element modelling suggest that BD1-CBC mafic dykes are derived from a melt originated through $20% melting of a depleted mantle source, whereas BN-CBC mafic dykes are probably derived from a high-Mg magma generated through $25% melting of a refractory mantle source. Both melts have undergone 30-40% olivine fractionation before the emplacement. Geochemistry also points out involvement of a plume in the genesis of these mafic dykes.

show abstract

Protopangaea: Palaeomagnetic definition of Earth's oldest (mid-Archaean-Palaeoproterozoic) supercontinent

Cited by 48 publications

References 71 publications

Paleomagnetism of the Amazonian Craton and its role in paleocontinents

Paleomagnetism of the Amazonian Craton and its role in paleocontinents

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

Early Precambrian mafic dyke swarms from the Central Archaean Bastar Craton, India: geochemistry, petrogenesis and tectonic implications

Contact Info

Product

Resources

About