A geomagnetic polarity timescale for the Carboniferous
نویسندگان
چکیده
Abstract The geomagnetic polarity pattern for the Carboniferous is incompletely known with best-resolved parts in Serpukhovian and Bashkirian. Hence, data from both igneous sedimentary units are also used an additional bias evaluation. In Tournaisian to mid Visean interval mainly derived palaeopole-type palaeomagnetic studies, allowing identification of chrons. Seven chrons exist Mississippian (MI1n B MI4n ) 33 conventional magnetochrons submagnetochrons (MI4r MI9r). Moscovian Gzhelian best resolved magnetostratigraphic studies Donets Basin southern Urals. Dispute about reliability these ill-founded, since assessment supporting suggests that datasets currently provide magnetic through Pennsylvanian. Polarity indicates a normal zone Kasimovian. Pennsylvanian there 27 (PE1n CI1r) one chron (PE8n ). Kiaman Superchron begins Bashkirian, clear indicating brief within Superchron. magnetochron timescale calibrated using 31 U–Pb zircon dates quantitative Bayesian-based age-scaling procedure.
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ژورنال
عنوان ژورنال: Geological Society, London, Special Publications
سال: 2021
ISSN: ['2041-4927', '0305-8719']
DOI: https://doi.org/10.1144/sp512-2020-102