منابع مشابه
The Crustal Structure
This thesis consists of three papers examining problems related to the crustal structure, isostasy and subsidence history of aseismic ridges and mid-plate island chains. Analysis of gravity and bathymetry data across the Ninetyeast and eastern Walvis Ridges indicates these features are locally compensated by an overthickening of the oceanic crust. Maximum crustal thicknesses are 15-30 km. The w...
متن کاملCrustal - Contaminated Melts ?
CRUSTAL-CONTAMINATED MELTS ? J. A. Barrat 1 , A. Yamaguchi, R.C. Greenwood, M. Bohn, J. Cotten, M. Benoit and I. A. Franchi, UBO-IUEM, CNRS-UMR 6538, Place Nicolas Copernic, F-29280 Plouzané Cedex ([email protected]), Antarctic Meteorite Research Center, National Institute of Polar Research, 1-9-10 Kaga, Itabashi, Tokyo 173-8515, Japan. PSSRI, Open University, Walton Hall, Milton Keynes MK7 ...
متن کاملEarly Crustal Evolution of Mars1
■ Abstract The bulk of the ∼50-km-thick Martian crust formed at ∼4.5 Gyr B.P., perhaps from a magma ocean. This crust is probably a basaltic andesite or andesite and is enriched in incompatible and heat-producing elements. Later additions of denser basalt to the crust were volumetrically minor, but resurfaced significant portions of the Northern hemisphere. A significant fraction of the total t...
متن کاملCrustal Structure of the Earth
The boundary between the crust and the mantle was discovered by Mohorovicic in 1909 under the European continent. Subsquent research in this century established the major differences between the continental and oceanic crust; a typical thickness for the continental crust is 30-50 km while a typical thickness for me oceanic crusts is 6 km. In terms of history the continental crust contains a muc...
متن کاملNeutron Star Crustal Interface Waves
The eigenfrequencies of nonradial oscillations are a powerful probe of a star’s interior structure. This is especially true when there exist discontinuities such as at the neutron star (NS) ocean/crust boundary, as first noted by McDermott, Van Horn & Hansen. The interface mode associated with this boundary has subsequently been neglected in studies of stellar nonradial oscillations. We revisit...
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ژورنال
عنوان ژورنال: Episodes
سال: 2018
ISSN: 0705-3797,2586-1298
DOI: 10.18814/epiiugs/2018/v41i1/008