2026-10-07T06:50:09Z https://api.figshare.com/v2/oai

oai:figshare.com:article/31424843 2026-09-15T20:40:00Z category_25819 category_25831 category_25816 category_25864 item_type_3 month_year_09_2026

Multistratigraphic dataset for the Carnian–Norian at Pink Mountain, British Columbia (palaeomagnetic, mineral magnetic, mineralogical and carbon isotopes) Mark W Hounslow (17006850) Michael J Orchard (8009675) Martyn L Golding (23260844) Husson John M (23260880) Matthew Stephens (23260894) Rizzieri Balestra (23260897) Palaeontology (incl. palynology) Stratigraphy (incl. biostratigraphy, sequence stratigraphy and basin analysis) Mineralogy and crystallography Magnetism and palaeomagnetism Magnetostratigraphy conodont biostratigraphy remagnetisation carbon isotope chemostratigraphy Norian timescale magnetic extracts <p dir="ltr">The dataset here includes all palaeomagnetic, rock magnetic, carbon isotope, x-ray-diffraction data, which contributes to the following conclusions at Pink Mountain, British Columbia.</p><p dir="ltr"><br></p><p dir="ltr">Extension of Late Triassic geomagnetic polarity records to the conodont and ammonoid dated successions of the North American Cordillera has proved problematic due to widespread remagnetizations. This theme is addressed by utilising a conodont dated succession in two sections from Pink Mountain on the eastern edge of the Cordilleran deformation front. Significantly these display the transitional <i>transformis</i> Zone between typically Lacian (lower Norian) and Alaunian (middle Norian) conodont faunas of the <i>triangularis</i> and <i>multidentata</i> zones respectively. A newly recognized positive carbon-isotope excursion occurs coincident with the base of the <i>transformis </i>Zone. Extraction of a Carnian – Norian magnetostratigraphy was partially successful but is obscured by a stronger Late Cretaceous pre-folding magnetisation. Microscopy, magnetic extracts, X-ray diffraction and rock magnetic data indicate detrital Fe-Ti oxides were dominated by ilmenite but are now heavily pyritised and leucoxenised. Depositional remanence is largely carried by magnetite inclusions in silicates and detrital chromites. The remagnetisation is carried by diagenetic Mn-Fe ferrites and small amounts of relict ferrian ilmenite in the decayed ilmenites. A thermoviscous remanence acquired during maximum burial also likely contributes. Radioisotopic dating of the <i>transformis</i> Zone suggests two scenarios of magnetostratigraphic correlation and a revision of the early-middle Norian timescale.</p><p dir="ltr">XRD data is in Phillips UDF format and listed in the excel file for single crystal runs.</p> 2026-09-15T20:40:00Z Dataset Dataset 10.6084/m9.figshare.31424843.v1 https://figshare.com/articles/dataset/Multistratigraphic_dataset_for_the_Carnian_Norian_at_Pink_Mountain_British_Columbia_palaeomagnetic_mineral_magnetic_mineralogical_and_carbon_isotopes_/31424843 CC BY 4.0