New constraints on the Upper Permian and Lower Triassic geomagnetic polarity timescale from the Abadeh section (central Iran)

Autor(en)

Yves Gallet, Leopold Krystyn, Jean Besse, Abdolah Saidi, Luc Emmanuel Ricou

Abstrakt

We present the magnetostratigraphy of the Abadeh section (central Iran). Thermal demagnetization shows two magnetic components: one at low unblocking temperatures, which corresponds to a present day-field direction, and another at high temperatures. This second component, which contains both polarities, is interpreted as a primary magnetization acquired during sediment deposition at a paleolatitude of about 7.7° S. A sequence of 14 magnetic polarity zones is obtained in the intervals during the Upper Dzhulfian-Lower Changhsingian (Upper Permian) and during the Griesbachian (Lower Triassic). Combining data from south China, Canada, Pakistan, and Iran, we propose a composite (but still uncomplete) Upper Permian and Lower Triassic geomagnetic polarity timescale. Copyright 2000 by the American Geophysical Union.

Organisation(en)

Institut für Paläontologie

Externe Organisation(en)

Université de Paris, Université Paris VII - Paris-Diderot, Geological Survey of Iran

Journal

Journal of Geophysical Research - Solid Earth

Band

105

Seiten

2805-2815

Anzahl der Seiten

11

ISSN

2169-9313

DOI

https://doi.org/10.1029/1999JB900218

Publikationsdatum

2000

Peer-reviewed

Ja

ÖFOS 2012

105118 Paläontologie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/c847cf77-120a-4c92-859a-75d1cacc3116