An expanding list of reliable paleomagnetic poles for Precambrian tectonic reconstructions

Evans, David A.D.; Pesonen, L. J.; Eglington, B. M.; Elming, Sten-åke; Gong, Zheng; Li, Zheng‐Xiang; McCausland, Phil J.A.; Meert, Joseph G.; Mertanen, S.; Pisarevsky, S.; Pivarunas, Anthony F.; Salminen, Johanna; Sanson-Hysell, Nicholas L.; Torsvik, Trond H.; Trindade, Ricardo Iván Ferreira da; Veikkolainen, Toni; Zhang, Shihong

doi:10.1016/b978-0-12-818533-9.00007-2

Cited by 25 publications

(25 citation statements)

References 295 publications

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“… Note . (1) Grade is the quality of the pole as assessed by the Nordic Paleomagnetism Workshops (Evans et al., 2021). “A” refers to poles that are considered to provide essential constraints given their high quality.…”

Section: Discussionmentioning

confidence: 99%

A Consistently High‐Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large‐Scale True Polar Wander

et al. 2021

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Section: Discussionmentioning

confidence: 99%

A Consistently High‐Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large‐Scale True Polar Wander

et al. 2021

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“…1140 Ma Abitibi diabase dikes and lamprophyre dikes of the Lake Superior region, and the earliest ca. 1108 Ma lavas and intrusions of the Midcontinent Rift all constrain Laurentia to have been at high latitudes during and after the time of Shawinigan orogenesis (Lake Superior region at ∼60°N;Evans et al, 2021; 1140 Ma reconstruction in Fig.5). The relatively low latitudinal velocity of Laurentia during this period prior to development of the Midcontinent Rift is in stark contrast to the record of paleomagnetic poles from the Midcontinent Rift in the ensuing ∼25 Myr interval from ca.…”

mentioning

confidence: 94%

The late Mesoproterozoic to early Neoproterozoic Grenvillian orogeny and the assembly of Rodinia: Turning point in the tectonic evolution of Laurentia

Swanson‐Hysell

Rivers

Lee

2023

Laurentia: Turning Points in the Evolution of a Continent

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The amalgamation of Laurentia’s Archean provinces ca. 1830 Ma was followed by ~700 m.y. of accretionary orogenesis along its active southeastern margin, marked by subduction of oceanic lithosphere, formation of arcs and back-arcs, and episodic accretion. This prolonged period of active-margin tectonic processes, spanning the late Paleoproterozoic and Mesoproterozoic eras, resulted in major accretionary crustal growth and was terminated by closure of the Unimos Ocean (new name). Ocean closure was associated with rapid motion of Laurentia toward the equator and resulted in continental collision that led to profound reworking of much of the accreted Proterozoic crust during the ca. 1090–980 Ma Grenvillian orogeny. The Grenvillian orogeny resulted in formation of a large, hot, long-duration orogen with a substantial orogenic plateau that underwent extensional orogenic collapse before rejuvenation and formation of the Grenville Front tectonic zone. The Grenvillian orogeny also caused the termination and inversion of the Midcontinent Rift, which, had it continued, would likely have split Laurentia into distinct continental blocks. Voluminous mafic magmatic activity in the Midcontinent Rift ca. 1108–1090 Ma was contemporaneous with magmatism in the Southwestern Laurentia large igneous province. We discuss a potential link between prolonged subduction of oceanic lithosphere beneath southeast Laurentia in the Mesoproterozoic and the initiation of this voluminous mafic magmatism. In this hypothesis, subducted water in dense, hydrous Mg-silicates transported to the bottom of the upper mantle led to hydration and increased buoyancy, resulting in upwelling, decompression melting, and intraplate magmatism. Coeval collisional orogenesis in several continents, including Amazonia and Kalahari, ties the Grenvillian orogeny to the amalgamation of multiple Proterozoic continents in the supercontinent Rodinia. These orogenic events collectively constituted a major turning point in both Laurentian and global tectonics. The ensuing paleogeographic configuration, and that which followed during Rodinia’s extended breakup, set the stage for Earth system evolution through the Neoproterozoic Era.

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“…Here we adopt the slightly less stringent Q-factors because of the paucity of Ediacaran data. Figure 1 shows the temporal distribution of the Ediacaran extracts of the Evans et al (2021) data set. These paleopoles are from the five target continents (i.e., Baltica, Congo, Laurentia, Rio de la Plata, and West Africa), and their age spectra have positive intersecting values with the Ediacaran period (635-541 Ma).…”

Section: Paleomagnetic Datamentioning

confidence: 99%

“…These paleopoles are from the five target continents (i.e., Baltica, Congo, Laurentia, Rio de la Plata, and West Africa), and their age spectra have positive intersecting values with the Ediacaran period (635-541 Ma). Evans et al (2021) divided the data into two classes: highest-quality grade-A and grade-B paleopoles. Grade-A results are "judged to provide essential constraints on tectonic reconstructions," whereas Grade-B poles are "judged to be suggestive of high-quality, but not yet demonstrated to be primary, or perhaps lacking precise geochronologic or other constraints.…”

Section: Paleomagnetic Datamentioning

confidence: 99%

“…Instead, we believe this method will aid in the testing and refinement of existing paleogeographic models, stimulate the creation of new models, and focus attention on critical new data that need to be acquired to reduce paleomagnetic bias and test rival reconstructions. We also provide the code (https://github.com/leiwuGeo/pmag_bias/) that will enable researchers to use this method to perform their own objective tests using the Evans et al (2021) database.…”

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Evaluation of Paleomagnetic Bias in Ediacaran Global Paleogeographic Reconstructions

Murphy

Nance

2022

Geophysical Research Letters

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Global paleogeographic reconstructions provide a first-order constraint on the lithospheric framework for specific time intervals of Earth's history and are a prerequisite for interpretations of the relationship between tectonic events and the many pivotal changes in other Earth systems. Paleomagnetic data provide the only means for quantitatively reconstructing Precambrian paleogeography, but there is a lack of consensus on the objective evaluation of these data, the overall spatial and temporal coverage of which is sparse (e.g., Evans et al., 2021). As a result, important inconsistencies exist between published paleogeographic models for much of the Precambrian. Authors of these paleogeographic models frequently contend that their models are permitted by paleomagnetic data and therefore represent plausible tectonic scenarios. Yet many of these models are mutually exclusive, exemplifying the need for objective metrics to discriminate between them.

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An expanding list of reliable paleomagnetic poles for Precambrian tectonic reconstructions

Cited by 25 publications

References 295 publications

A Consistently High‐Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large‐Scale True Polar Wander

A Consistently High‐Latitude South China From 820 to 780 Ma: Implications for Exclusion From Rodinia and the Feasibility of Large‐Scale True Polar Wander

The late Mesoproterozoic to early Neoproterozoic Grenvillian orogeny and the assembly of Rodinia: Turning point in the tectonic evolution of Laurentia

Evaluation of Paleomagnetic Bias in Ediacaran Global Paleogeographic Reconstructions

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