Magnetobiostratigraphy of the Spathian to Anisian (Lower to Middle Triassic) Kçira section, Albania

Abstract

Magnetobiostratigraphic data are presented from three Early/Middle Triassic HanBulog Limestone successions from Kqira, northern Albania. A total of 206 standard palaeomagnetic samples were obtained for thermal demagnetization and statistical analysis from the 42, 10 and 5 m thick sections. The reversal-bearing characteristic component, carried by haematite and magnetite, defines a composite sequence of six main polarity intervals (Kqln to Kq3r) in which are embedded four short polarity intervals, one at the base of Kqln and three towards the top of Kqlr. The early acquisition of the characteristic remanence is supported by the lateral correlation of magnetozones between sections. The Early/Middle Triassic boundary, approximated by the first occurrence of the conodont Chiosella timorensis, falls close to the Kqlr/Kq2n polarity transition. This is in good agreement with recently published magnetobiostratigraphic data from the coeval Chios (Greece) sections. The palaeomagnetic pole calculated from the Kqira characteristic directions lies close to the Triassic portion of the apparent polar wander path for Laurussia (in European coordinates). However, a 40-45" clockwise rotation of the external zone of the Albano-Hellenic Belt to the south of the Scutari-Pec Line is thought to have occurred since the Early-Middle Miocene. The Kqira pole acquires a West Gondwana affinity when restored for the Neogene clockwise rotation. If the clockwise rotation was entirely related to Neogene tectonics, the Kqira area was evidently associated with West Gondwana and located at 12-16"N of the western Tethys margin.

Recovery dynamics of foraminifers and algae following the Permian-Triassic extinction in Qingyan, South China

“…2). Earlandia gracilis has been already documented from the uppermost Olenekian in South China (Song et al, 2011b), from Anisian rocks in Albania (Muttoni et al, 1996), and from Ladinian rocks in Dinarides (Pantic, 1972). Endoteba bithynica is known from Olenekian strata in South China (Song et al, 2011b) and Turkey ; from Anisian rocks in South China (Song et al, 2011b), Turkey and Italy ; from Ladinian rocks in Italy and Northern Thailand (Kobayashi et al, 2006); and from Upper Triassic strata in Northern Thailand (Kobayashi et al, 2006) and Southwestern Cyprus .…”

Latest Permian to Middle Triassic cyclo-magnetostratigraphy from the Central European Basin, Germany: Implications for the geomagnetic polarity timescale

“…Kozur, 1999;Geluk, 2005), which in the Polish nomenclature (Kozur, 1999;Bachmann and Kozur, 2004) and magnetostratigraphy (on the left) with biostratigraphically calibrated magnetic records from the Boreal (Hounslow et al, 2006) and Tethyan realms (Li and Wang, 1989;Muttoni et al, 1996;Scholger et al, 2000), in which the biostratigraphy of the Southern Alps sections is taken from Farabegoli and Perri (1998). 1 age of 252.6 Ma for the PTB (Mundil et al, 2004) was used to anchor the Buntsandstein cyclostratigraphy (estimated ages are shown in italics within the Buntsandstein column), 2 radioisotopic age from (Ovtcharova et al, 2006), 3 radioisotopic age from (Lehrmann et al, 2006).…”

“…In the last two decades, significant progress has been made in constructing an integrated biomagnetostratigraphy for the marine Lower Triassic and, particularly, the Permian-Triassic boundary (PTB) interval (e.g. Heller et al, 1988;Li and Wang, 1989;Ogg and Steiner, 1991;Muttoni et al, 1996;Scholger et al, 2000;Gallet et al, 2000;Tong et al, 2004). With the objective to enable also detailed global correlation of the Germanic Triassic, a considerable number of studies focused on Buntsandstein magnetostratigraphy (e.g.…”

The Permian and Triassic in the Albanian Alps

“…Pelagic deposition started in the Spathian (late Olenekian) (Muttoni et al 1996;Germani 1997), and there was an outpouring of volcanics from the middle Anisian. Evidence of new oceanic crust starts from the late Anisian (Chiari et al 1996;Gawlick et al 2008).…”

“…In the marginal part of the Mirdita Zone, within the blocks forming the sole of the nappe, fragments of Olenekian-Middle Triassic succession are recognized (Kçira, Qerreti, Rubiku, Miraka among others) (Shallo 1992;Kellici and de Wever 1994;Kodra et al 1995;Muttoni et al 1996;Chiari et al 1994Chiari et al , 1996Germani 1997;Gawlick et al 2008). Pelagic deposition started in the Spathian (late Olenekian) (Muttoni et al 1996;Germani 1997), and there was an outpouring of volcanics from the middle Anisian.…”