TY - JOUR N2 - Palaeomagnetic investigation of the Upper Carboniferous clastic Hyrnefjellet Formation from opposite limbs of the Hyrnefjellet Anticline in southern Spitsbergen (Svalbard Archipelago) uncovered two components of NRM. Direction C1 (D = 224.6°; I = –27.9°; κ = 22.40; α95% = 5.6°) is of prefolding origin and most probably of near-primary origin. High Tb spectra above 575°C indicate hematite as the carrier of C1. Acquisition of the C1 component may be related to an early diagenetic crystallization of hematite, not excluding a detrital origin of the NRM. A paleopole calculated for the C1 component (F = 23.3°N; L= 147.7°E) falls into the Late Devonian–Early Carboniferous sector of APWP for Baltica. This result suggests that Svalbard remained in the present day orientation with respect to Baltica since the Carboniferous time. A second component with intermediate unblocking temperatures, determined in the Hyrnefjellet Formation deposits, is labelled C2. Its mean orientation for in situ position is D = 11.2°; I = 69.2° (κ = 44.05; α95% = 6.3°), thus being similar to Late Mesozoic directions for Baltica. After 100% tectonic correction for tilting of anticline limbs and axis, the C2 component orientation is D = 265.7°; I = 59.7°, thus being distant from any directions for Baltica. Detailed analysis suggest that the C2 component is most probably of synfolding origin, and it was formed during the Tertiary Alpine Tectonic Event. L1 - http://journals.pan.pl/Content/110654/PDF-MASTER/ppr25-169.pdf L2 - http://journals.pan.pl/Content/110654 PY - 2004 IS - No 2 EP - 182 KW - Arctic KW - Spitsbergen KW - Palaeozoic KW - palaeomagnetism KW - palaeogeography KW - tectonics A1 - Michalski, Krzysztof A1 - Lewandowski, Marek PB - Polish Academy of Sciences PB - Committee on Polar Research VL - vol. 25 DA - 2004 T1 - Palaeomagnetic results from the Middle Carboniferous rocks of the Hornsund region, southern Spitsbergen: preliminary report SP - 169 UR - http://journals.pan.pl/dlibra/publication/edition/110654 T2 - Polish Polar Research ER -