Estimation of the age of the Chad ultramafite Massif from paleomagnetic data, the Khabarovsk Territory
Paleomagnetic study of ultramafite rocks (dunites and clinopyroxenites) of the Chad Massif has been carried out. The arguments have been advanced indirectly supporting a thermoremanent nature and primary formation of the characteristic remanent magnetizations (ChRMs) that have been distinguished for these rocks. The calculated paleopole coordinates are as follows: a) for dunites - Рlat = 67.0°, Plong = 200.4°, dp = 3.0°, dm = 2.7°; b) for clinopyroxenites - Рlat = 67.5°, Plong = 204.5°, dp = 3.4°, dm = 3.0°. Based on these data it is suggested the Early Cretaceous age of the Chad dunites and clinopyroxenites.