New paleomagnetic results from Ceno-Mesozoic volcanic rocks along southernrim of the Tarim Basin, China

Paleomagnetic samples were collected from four localities located in the so uthern rim of the Tarim basin. The samples were taken from volcanic rocks e rupted between Jurassic and Quaternary. Detailed analysis of all samples ha s been carried out with progressive thermal demagnetization. A characterist ic remanence (ChRM) with higher unblocking temperature has been isolated fr om all samples. The pole position from the middle Jurassic is at 52.5 degre es N, 187.9 degrees E (dp = 3.7 degrees, dm = 6.5 degrees); the directions of the ChRM of Cretaceous correspond to a paleopole at 69.7 degrees N, 211. 6 degrees E ( dp = 9.8 degrees, dm = 15.9 degrees); the Quaternary pole fro m the Pulu site is at 79.9 degrees N, 183.1 degrees E ( dp = 1.6 inverted p erpendicular, dm = 2.4 degrees). On the basis of these new paleomagnetic da ta, tectonic evolution of Tarim block is presented.