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

We present the magnetostratigraphy of the Abadeh section (central Iran), Th ermal demagnetization shows two magnetic components: one at low unblocking temperatures, which corresponds to a present day-field direction, and anoth er: at:high temperatures. This second component, which contains both polari ties, is interpreted,as a primary magnetization acquired during sediment de position at a paleolatitude of about 7.7 degrees S. A sequence of 14 magnet ic polarity zones is obtained in the intervals during the Upper Dzhulfian-L ower Changhsingian (Upper Permian) and during the Griesbachian: (Lower Tria ssic). Combining data from south China, Canada, Pakistan, and Iran, we prop ose a composite (but still uncomplete) Upper Permian and Lower Triassic geo magnetic polarity timescale.