Crustal root beneath the Urals: Wide-angle seismic evidence

被引:74
作者
Carbonell, R
PerezEstaun, P
Gallart, J
Diaz, J
Kashubin, S
Mechie, J
Stadtlander, R
Schulze, A
Knapp, JH
Morozov, A
机构
[1] BAZHENOV GEOPHYS EXPEDIT, SCHEELITE 624051, RUSSIA
[2] GEOFORSCHUNGSZENTRUM, D-14473 POTSDAM, GERMANY
[3] CORNELL UNIV, INST STUDY CONTINENTS, ITHACA, NY 14853 USA
[4] ROSCOMNEDRA, MOSCOW 107140, RUSSIA
关键词
D O I
10.1126/science.274.5285.222
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Wide-angle reflection and refraction data acquired as part of the URSEIS '95 geophysical experiment across the southern Uralide orogen provide evidence for a 12- to 15-kilometer-thick crustal root, yielding a total crustal thickness of 55 to 58 kilometers, Strong reflections from the Mohorovicic discontinuity (Moho) at relatively small precritical distances suggest that the crust-mantle transition beneath the crustal root is a sharp feature, The derived P- and S-wave velocity models constrain key physical properties of the crust, including the depth oi the mafic rocks of the Magnitogorsk volcanic are and the existence of a lower crustal zone of possible basic rock enrichment beneath the East Uralian zone.
引用
收藏
页码:222 / 224
页数:3
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