Seismic image of the Tarim basin and its collision with Tibet

Citation
H. Kao et al., Seismic image of the Tarim basin and its collision with Tibet, GEOLOGY, 29(7), 2001, pp. 575-578
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
GEOLOGY
ISSN journal
0091-7613 → ACNP
Volume
29
Issue
7
Year of publication
2001
Pages
575 - 578
Database
ISI
SICI code
0091-7613(200107)29:7<575:SIOTTB>2.0.ZU;2-J
Abstract
A broadband seismic deployment in 1998-1999 in southwestern Tarim provided data for imaging the crust and upper mantle across the contact between the Tarim block and the Tibetan Plateau. A profile composed of migrated telesei smic receiver functions clearly shows lateral structural changes. The crust under the Tarim basin is relatively simple, The Moho discontinuity is mapp ed at a depth of 42 km near the northern end of the array and dips gently t oward the south to similar to 50 km under the Kunlun foreland. The Tarim ba sin appears to be rigid, with little shortening. Farther to the south, the imaging reveals a complex of reflectors in the lower crust and the upper ma ntle. There are both north- and south-dipping upper mantle structures under the Kunlun foreland and Kunlun Shan region. We found the observations to b e more consistent with a model of lithospheric collision in which the crust and the upper mantle on both sides interpenetrate and deform.