Lateral Variations of the Mantle Transition Zone Structure beneath Eastern China

被引：6

作者：

Huang, Hui ^{[1
,2
]}

Wang, Pan ^{[1
,2
]}

Mi, Ning ^{[1
,2
]}

Huang, Zhouchuan ^{[1
,2
]}

Xu, Mingjie ^{[1
,2
]}

Wang, Liangshu ^{[1
,2
]}

Li, Hua ^{[1
,2
]}

Yu, Dayong ^{[1
,2
]}

机构：

[1] Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Sch Earth Sci & Engn, Inst Geophys & Geodynam, Nanjing 210046, Jiangsu, Peoples R China

来源：

BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA | 2014年 / 104卷 / 03期

基金：

中国国家自然科学基金;

关键词：

SOUTH CHINA; SUBDUCTION; WAVES;

D O I：

10.1785/0120130315

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The mantle transition zone (MTZ) structure beneath eastern China is studied by using P-wave receiver functions. The 410 km discontinuity is relatively flat whereas the depth of the 660 km discontinuity varies significantly under the study area. This indicates that the 660 is more influenced by laterally varying temperature. The 520 km discontinuity is continuously observed at similar to 520 km depth under a limited area. Within the South China Block, the MTZ thickness under the Yangtze Craton is larger than normal whereas that under the Cathaysia Block is nearly normal. This indicates colder temperature affecting the MTZ beneath the Yangtze Craton. Combined with seismic tomography, our result suggests that the stagnant ancient slab beneath eastern China is mainly trapped around the base of the MTZ beneath the Yangtze Craton in the study area.

引用

页码：1533 / 1539

页数：7

共 28 条

[1] The building of south China: Collision of Yangzi and Cathaysia blocks, problems and tentative answers [J].