The paleomagnetism of the Talchir series of the lower Gondwana system, Central India

Abstract

Oriented samples were collected from two localities in the Upper Carboniferous Talchir Series in Central India. The material from one locality - slightly disturbed, almost unconsolidated, laminated sediments near Nagpur - revealed a stable direction of magnetization after a partial demagnetization in alternating fields. The magnetic behaviour of the samples after treatment with AC magnetic fields is discussed. The mean direction of magnetization of a selected number of 23 samples is D = 66.1° and I = +59.2° (pole position 31.5°S, 45.7°W, δp = 3.2° and δm = 2.6°). The value of the mean inclination implies that the paleolatitude of the Nagpur district was about 40°S during Upper Carboniferous times. It is argued that this latitude is not contrary to the glacial conditions prevailing at the time of the deposition of the sediments. Show more