New palaeomagnetic results from the Oslo Graben, a Permian Superchron lava province

Haldan, M.M.; Meijers, Maud J.M.; Langereis, C.G.; Larsen, B. T.; Heyer, Herbert

doi:10.1093/gji/ggu351

Cited by 13 publications

(25 citation statements)

References 65 publications

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“…In recent years, several studies aiming to evaluate the PSV pattern through geological time have been presented in literature (Biggin et al, 2008a(Biggin et al, , 2008bHaldan et al, 2009Haldan et al, , 2014Johnson et al, 2008). However, they are still incipient, taking into account the little knowledge that is available on PSV behavior during the longer (10 7 Ma), single geomagnetic polarity periods called ''superchrons''-which have been considered as a possible result of special geodynamo states (Gubbins & Herrero-Bervera, 2007).…”

Section: Supporting Informationmentioning

confidence: 99%

“…There are still very few studies focusing on the PCRS, which may be partially due to the difficulties in obtaining reliable paleomagnetic data for this period. The few attempts were mostly focused on the Lower Permian, ranging only low (paleo)latitudes (0°N–25°N; e.g., Haldan et al, ). These authors pointed out that the S (the total angular dispersion of N VGPs; see section 2.2 for further details) is significantly smaller at low latitudes in comparison with those of the last 5 Ma, as found by McElhinny and McFadden () and Johnson et al (), and similar to the discussion about the CNS by Biggin et al ().…”

Section: Introductionmentioning

confidence: 99%

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Behavior of the Paleosecular Variation During the Permian‐Carboniferous Reversed Superchron and Comparisons to the Low Reversal Frequency Intervals Since Precambrian Times

Oliveira

Franco

Brandt

et al. 2018

Geochem Geophys Geosyst

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We investigated the (paleo)latitudinal dependence of angular dispersion sets of virtual geomagnetic poles (VGPs) for the Permian‐Carboniferous Reversed Superchron (PCRS: 262–318 Ma). In order to analyze the paleosecular variation during this period, we prepared different paleomagnetic data sets from scientific databases and recent literature, based on selection criteria which provided high degree of refinement. Model G of McFadden et al. (1988) was fitted to the VGP dispersion data, providing the shape parameters a and b, which were further compared with similar results for the Cretaceous Normal Superchron (CNS) and other periods of different geomagnetic reversal rates throughout the last 3 Ga. Our results indicate high similarity between the angular VGP dispersion from the PCRS and CNS (a low VGP dispersion at low paleolatitudes, and strong paleolatitudinal dependence), in contrasting difference for periods of higher reversal rates (the last 5 Ma). Despite the geodynamic differences related to both Phanerozoic superchrons, such evidence could point out similar heat flux conditions in the CMB, which may favor compatible stability conditions throughout these magnetozones. Notably, two additional observations which arose from the shape parameters relations for both Phanerozoic superchrons and Precambrian data sets demand further investigation: (i) a pattern of increase for the b/a ratio throughout the 0.5–1.6 Ga interval was observed, which could be partially explained by the Maya Superchron, recently proposed by Gallet et al. (2012) and (ii) the b × a relationship for both Phanerozoic superchrons and the 2.45–2.82 Ga interval pointed to the presence of one or more long‐term magnetozones throughout the Paleoproterozoic.

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Section: Supporting Informationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Behavior of the Paleosecular Variation During the Permian‐Carboniferous Reversed Superchron and Comparisons to the Low Reversal Frequency Intervals Since Precambrian Times

Oliveira

Franco

Brandt

et al. 2018

Geochem Geophys Geosyst

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“…The lack of consistency in the poles for Laurentia and Gondwana in Wegener's classic Pangea led Jaeger and Irving [1957] and Carey [1958] to raise a problem that was referred to as the Intra-Pangean Paleomagnetic (IPP) anomaly. Once the debate was opened, in the late 1950s, the introduction by Irving [1977] of the B-type Pangea led to a discussion that is yet a matter of hot debate [Muttoni et al, 2003;Bilardello and Kodama, 2010a;Meijers et al, 2010;Yuan et al, 2011;Aubele et al, 2012;Domeier et al, 2012;Haldan et al, 2014].…”

Section: Introductionmentioning

confidence: 99%

A pure dipole analysis of the Gondwana apparent polar wander path: Paleogeographic implications in the evolution of Pangea

Gallo

Tomezzoli

Cristallini

2017

Geochem Geophys Geosyst

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The paleogeography of prebreakup Pangea at the beginning of the Atlantic Spreading has been a subject of debate for the past 50 years. Reconciling this debate involves theoretical corrections that cast doubt on available data and paleomagnetism as an effective tool for performing paleoreconstructions. This 50 year old debate focuses specifically on magnetic remanence and its ability to correctly record the inclination of the paleomagnetic field. In this paper, a selection of paleopoles was made to find the great circles containing the paleomagnetic pole and the respective sampling site. The true dipole pole (TDP) was then calculated by intersecting these great circles, effectively avoiding nondipolar contributions and inclination shallowing, in an innovative method. The great circle distance between each of these TDPs and the paleomagnetic means show the accuracy of paleomagnetic determinations in the context of a dominantly geocentric, axial, and dipolar geomagnetic field. The TDPs calculated allowed a bootstrap analysis to be performed to further consider the flattening factor that should be applied to the sedimentary‐derived paleopoles. It is argued that the application of a single theoretical correction factor for clastic sedimentary‐derived records could lead to a bias in the paleolatitude calculation and therefore to incorrect paleogeographic reconstructions. The unbiased APWP makes it necessary to slide Laurentia to the west in relation to Gondwana in a B‐type Pangea during the Upper Carboniferous, later evolving, during the Early Permian, to reach the final A‐type Pangea configuration of the Upper Permian.

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“…It is not so with the other two cases (## 13 and 20), with rather low latitudes of ~ 20° and N ~ 100. The somewhat anomalous parameters of the data from the Oslo graben (# 20) have been noted by their authors (Haldan et al, 2014) and accounted for by ca. 7° relative rotations, but this explanation looks less likely for the platformal Etendeka traps (# 13).…”

Section: Form Parameters: Predicted and Observedmentioning

confidence: 77%

“…Even for the largest collections studied the confidence intervals are still very wide (e.g., Fig. 11 in Haldan et al, 2014).…”

Section: Form Parameters: Predicted and Observedmentioning

confidence: 99%

Paleomagnetism and dating of a thick lava pile in the Permian Bakaly formation of eastern Kazakhstan: Regularities and singularities of the paleomagnetic record in thick lava series

Bazhenov

Voo

Menzo

et al. 2016

Physics of the Earth and Planetary Interiors

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New palaeomagnetic results from the Oslo Graben, a Permian Superchron lava province

Cited by 13 publications

References 65 publications

Behavior of the Paleosecular Variation During the Permian‐Carboniferous Reversed Superchron and Comparisons to the Low Reversal Frequency Intervals Since Precambrian Times

Behavior of the Paleosecular Variation During the Permian‐Carboniferous Reversed Superchron and Comparisons to the Low Reversal Frequency Intervals Since Precambrian Times

A pure dipole analysis of the Gondwana apparent polar wander path: Paleogeographic implications in the evolution of Pangea

Paleomagnetism and dating of a thick lava pile in the Permian Bakaly formation of eastern Kazakhstan: Regularities and singularities of the paleomagnetic record in thick lava series

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