The 3-D structure of shear wave in South China and the southward extensionof Tanlu fault

Citation
Jw. Teng et al., The 3-D structure of shear wave in South China and the southward extensionof Tanlu fault, CHIN SCI B, 46(4), 2001, pp. 284-289
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
CHINESE SCIENCE BULLETIN
ISSN journal
1001-6538 → ACNP
Volume
46
Issue
4
Year of publication
2001
Pages
284 - 289
Database
ISI
SICI code
1001-6538(200102)46:4<284:T3SOSW>2.0.ZU;2-T
Abstract
By processing the CSND Rayleigh wave data with the matched filter FTAN tech nique, Rayleigh wave dispersion for southeast China is obtained, The 4 degr ees x 4 degreesS wave dispersion of the pure path is calculated using rando m inversion scheme, and 3-D S wave velocity structure is set up. Incorporat ing the above-mentioned results with wide angle seismic sounding data, we s tudied structure framework and the extending of faults in this area, which demonstrates that the depth of Moho in South China varies from 30 to 40 km, shallower from west to east. The depth of Moho varies from 25 to 28 km for the offshore. The depth of the asthenosphere in upper mantle varies from 6 0 to 100 km, The depth difference of layers at the two sides of Tanlu fault is more than 10 km at the south part of the Yangtze River, and the fault e xtends downward more than 170 km. The fault exceeds the main land at Hainan Island and slips into the southern China Sea, Both Tanlu fault and the hug e bend of gravity gradient anomaly are influenced by deep latent tectonics.