Seismic receiver functions and the lithosphere–asthenosphere boundary
Seismic receiver functions and the lithosphere–asthenosphere boundary
复制标题
地震接收函数和岩石圈-软流圈边界
DOI:
10.1016/j.tecto.2012.03.005
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发表时间:
2012
期刊:
影响因子:
2.9
通讯作者:
中科院分区:
文献类型:
--
作者:
The lower boundary of the lithospheric plates has remained as an enigmatic boundary for seismologists, since it is relatively poorly observed by seismic means. There is traditionally a broad consensus that the asthenosphere is observable as a low velocity zone by seismic surface waves. Seismic techniques which use shorter period P-to-S or S-to-P converted body waves are now far enough developed to be successful in observing such a low velocity zone with a higher resolution. The principle of this technique (the so-called receiver function technique) is that a strong teleseismic mother phase (e.g. P, S, PP or SKS) incident from below on any seismic discontinuity beneath a station produces a converted phase (Ps or Sp) which indicates its depth and properties. We discuss details of this technique. A sufficient number of such observations exist already to indicate that the top of the low velocity zone is a globally observable discontinuity and it is sharper than previously thought. An intriguing observation is that in some cratons the new seismic data indicate that the low velocity zone exists already at shallower depths than obtained from surface waves. This confirms earlier results from controlled source observations (Thybo and Perchuc, 1997). We discuss possible interpretations of this shallow low velocity zone in cratonic regions.
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影响因子:
--
作者:
Prakash Kumar;R. Kind;K. Priestley;T. Dahl
通讯作者:
T. Dahl
影响因子:
2.9
作者:
H. Thybo
通讯作者:
H. Thybo
影响因子:
2.8
作者:
X. Yuan;M. Bianchi;R. Kind;J. Gossler
通讯作者:
J. Gossler
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
X. Yuan;Xueqing Li;I. Wölbern;R. Kind
通讯作者:
R. Kind
影响因子:
5.3
作者:
H. Ford;K. Fischer;D. L. Abt;C. Rychert;L. Elkins‐Tanton
通讯作者:
H. Ford;K. Fischer;D. L. Abt;C. Rychert;L. Elkins‐Tanton