The crust-mantle transition and the Moho beneath the Vogtland/West Bohemian region in the light of different seismic methods
The crust-mantle transition and the Moho beneath the Vogtland/West Bohemian region in the light of different seismic methods
复制标题
不同地震方法下沃格特兰/西波希米亚地区壳幔转变和莫霍面
DOI:
10.1007/s11200-009-0018-6
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发表时间:
2009
影响因子:
0.9
通讯作者:
Geissler
中科院分区:
文献类型:
--
作者:
Hrubcova;Geissler
The structure of the crust and the crust-mantle boundary in the Vogtland/West Bohemian region have been a target of several seismic measurements for the last 25 years, beginning with the steep-angle reflection seismic studies (DEKORP-4/KTB, MVE-90, 9HR), the refraction and wide-angle experiments (GRANU’95, CELEBRATION 2000, SUDETES 2003), and followed by passive seismic studies (receiver functions, teleseismic tomography). The steep-angle reflection studies imaged a highly reflective lower crust (4 to 6 km thick) with the Moho interpreted in a depth between 30 and 32 km and a thinner crust beneath the Eger Rift. The refraction and wide-angle reflection seismic studies (CELEBRATION 2000) revealed strong wide-angle reflections in a depth of 26–28 km interpreted as the top of the lower crust. Long coda of these reflections indicates strong reflectivity in the lower crustal layer, a phenomenon frequently observed in the Caledonian and Variscan areas. The receiver function studies detected one strong conversion from the base of the crust interpreted as the Moho discontinuity at a depth between 27 and 37 km (average at about 31 km). The discrepancies in the Moho depth determination could be partly attributed to different background of the methods and their resolution, but could not fully explain them. So that new receivers function modelling was provided. It revealed that, instead of a first-order Moho discontinuity, the observations can be explained with a lower crustal layer or a crust-mantle transition zone with a maximum thickness of 5 km. The consequent synthetic ray-tracing modelling resulted in the model with the top of the lower crust at 28 km, where highly reflective lower crustal layer can obscure the Moho reflection at a depth of 32–33 km.
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DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
T. Fischer;J. Michałek
通讯作者:
J. Michałek
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
E. Engdahl
通讯作者:
E. Engdahl
影响因子:
4.2
作者:
W. Geissler;H. Kämpf;R. Kind;K. Bräuer;K. Klinge;T. Plenefisch;J. Horalek;J. Zedník;V. Nehybka
通讯作者:
V. Nehybka
影响因子:
2.4
作者:
K. Mengel;H. Kern
通讯作者:
K. Mengel;H. Kern
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
M. Barazangi;Larry D. Brown
通讯作者:
Larry D. Brown