Paleomagnetism of the Carboniferous Gresford Block, Tamworth Belt, southern New England Orogen: minor counter-clockwise rotation of a primary arc segment

Klootwijk, Chris

doi:10.1080/08120099.2020.1674381

Cited by 4 publications

(4 citation statements)

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“…The palaeomagnetic studies in the forearc basin, that is the Tamworth Belt of the New England Orogen (Geeve et al 2002;Klootwijk 2002Klootwijk ,2003Klootwijk , 2016Klootwijk , 2019, provides a unique set of stratigraphically wellconstrained, sampling sites, which allow these to be combined with the more magnetostratigraphicstyle study of Opdyke et al (2000) from the northern part of the Tamworth Belt. The Mississippian and Pennsylvanian successions in most of the Tamworth Belt are divided by a late Visean to Serpukhovian uplift and hiatus, with the Pennsylvanian successions seeing glaciogenic sediments deposited with volcanogenic and fluvial units (Glen & Roberts 2012;Phillips et al 2016).…”

Section: New England Orogen Tamorth Belt E Australiamentioning

confidence: 99%

“…The Mississippian in the SE of the Tamworth belt in the Rouchel, Gresford and Myall blocks has the most extensive polarity dataset ( Fig. 4), based on the work of Geeve et al (2002) and Klootwijk (2016Klootwijk ( , 2019). This appears to show at minimum five normal polarity magnetozones ( Fig.…”

Section: New England Orogen Tamorth Belt E Australiamentioning

confidence: 99%

“…4. Polarity (N=normal, R=reverse) of palaeomagnetic sampling sites from the Tamworth Belt of the New England Orogen from Geeve et al (2002) and Klootwijk (2016Klootwijk ( , 2019, placed onto the adapted Fig. 3.…”

Section: Figure Captionsmentioning

confidence: 99%

“…Klootwijk (2016) data through the mid Visean Gilmore volcanic are sufficiently close for a mini-magnetostratigraphy. Klootwijk (2016) sites 2-6 in the Foybrook Andesite (Waverly Fm), where moved to near the base of the Waverly Fm in Klootwijk (2019). The normal polarity magnetozones through the Visean have been labelled (TB for Tamworth Belt).…”

Section: Figure Captionsmentioning

confidence: 99%

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A geomagnetic polarity timescale for the Carboniferous

Hounslow

2021

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The geomagnetic polarity pattern for the Carboniferous is incompletely known, but with the best resolved parts in the Serpukhovian and Bashkirian. Hence, data from both igneous and sedimentary units are also used in an additional polarity bias evaluation. In the Tournaisian to mid Visean interval polarity is mainly derived from palaeopole-type palaeomagnetic studies, allowing identification of polarity bias chrons. Seven polarity bias chrons exist in the Mississippian (MI1nB to MI4nB) with an additional 33 conventional magnetochrons and submagnetochrons (MI4r to MI9r). The Moscovian and Gzhelian polarity is best resolved in magnetostratigraphic studies from the Donets Basin and the southern Urals. Dispute about the reliability of these data is ill-founded, since an assessment of supporting data from palaeopole-type studies suggests that these datasets currently provide the best magnetic polarity data through the Pennsylvanian. Polarity bias assessment indicates a normal polarity bias zone in the Kasimovian. In the Pennsylvanian there are 27 conventional magnetochrons and submagnetochrons (PE1n to CI1r) and one normal polarity bias chron (PE8nB). The Kiaman Superchron begins in the mid Bashkirian, with clear data indicating brief normal polarity submagnetochrons within the Superchron. The magnetochron timescale is calibrated using 31 U-Pb zircon dates and a quantitative Bayesian-based age-scaling procedure.

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