<Emphasis Type="Italic">Q</Emphasis> value structure of geoscience transect from Korla to Jimsar and its geodynamic implication |
| |
Authors: | Email author" target="_blank">Junmeng?ZhaoEmail author Jichang?Fan Zhichun?Li |
| |
Institution: | (1) Institute of Geology, China Seismological Bureau, 100029 Beijing, China;(2) Center for Geophysical Exploration, China Seismological Bureau, 450000 Zhengzhou, China;(3) Institute of Occupational Disease Protection for Laboring Hygiene of Hunan Province, 410000 Changsha, China |
| |
Abstract: | In this paper, the methods for Q value inversion in 2-D lateral inhomogeneous medium have been introduced. The 2-D Q value
inversion has been conducted using seismic wide-angle reflection/refraction data of the profile from Korla to Jimsar. The
result shows that the 2-D Q value structure of the transect from Korla to Jimsar is characterized by vertical stratifying
and lateral zoning. Vertically, the crust can be divided into upper crust, middle crust and lower crust with the Q value increasing
downwards. Horizontally, the total transect can be classified as three regions— the northern margin of the Tarim Basin, the
Tianshan orogenic belt (TOB) and the southern margin of the Junggar Basin. At the northern margin of the Tarim Basin the Q
value increases northwards, indicating a northward subduction of the Tarim Basin into the The Q value within the TOB jumps
near Kumux, making a stage-like difference in Q value. The Q value distribution at the southern margin of the JB suggests
a southward subduction of the Junggar Basin (JB) into the
The double subduction pattern of the and JB into the TOB revealed by the transect from Korla to Jimsar has a big difference
from the model “lithospheric subduction with intrusion of the layers into the crust” developed according to the results of
the geoscience transect from Xayar to Burjing. The differences between the two provide some dynamic evidence at lithospheric
scale for the segmentation of the
Zhang Xiankang, Zhang Chengke, Jia Shixu et al., A summary report on exploration and research on GGT (in Chinese), 1999
Xu Xinzhong, A summary report on the results of seismic exploration on the comprehensive geophysical profile from Kktuohai
to Aksai (in Chinese), 1990 |
| |
Keywords: | Q value structure Tarim Basin Tianshan orogenic belt Junggar Basin subduction geodynamics |
本文献已被 SpringerLink 等数据库收录! |
|