Earth’s upper mantle
Surface wave studies of the Australian upper mantle
... of Earth models to the surface wave dispersion observed in ...Earth's upper mantle, suggesting a thickness of ...real Earth is caused by a thin low velocity channel, it will not be possible to ...
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Geodynamical interpretation of crustal and upper mantle electrical conductivity anomalies in Sayan Baikal province
... Based on the available geological, geophysical and tec- tonic data, we hypothesis that the excitating source of heat occurs not under the rift zone but beneath the thick insulat- ing continental lithosphere of the ...
11
Petrology of the earth's deep crust and upper mantle and the origins of magmas in the earth and moon
... Based on the results of the 10 kbar melting study on MORB pyrolite, Tinaquillo lherzolite, Hawaiian pyrolite and KLB-1, primitive MORB glasses with Mg# 0.68 are not primary magmas at 10 [r] ...
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Determination of three dimensional distribution of electrical conductivity in the Earth’s mantle from Swarm satellite data: Time domain approach
... The resulting model is shown in the left panel of Fig. 2. The recovery of the uppermost 400 km is poor with spu- rious 3-D oscillations present below the oceans, and im- mediately above the large target heterogeneity. ...
8
Numerical models of convection in a rheologically stratified oceanic upper mantle: Early results
... Earth’s mantle can be ap- proximated as viscous when we consider various phenomena in a geological time scale, and a viscous fluid is commonly used in modeling a subsolidus convection in the ...the mantle, ...
8
Upper mantle structure from long-period SH
... low S-wave velocities exist beneath the Alps to depths of 300 ...an upper limit on the depth to which the anisotropy exists, but suggest that as little as 10 km of material possessing 7% velocity anisotropy ...
271
Computational petrology: Subsolidus equilibria in the upper mantle
... Earth’s mantle are not accessible to direct ...of mantle material that have been transported to the surface as xenoliths provide useful information on phase relations and compositions of phases at the ...
294
Earth Science Review Part 1.pdf
... of the Earth’s crust which includes the upper and lower mantle as well as the transition zone.... THE CRUST.[r] ...
98
Tippers at island geomagnetic observatories constrain electrical conductivity of oceanic lithosphere and upper mantle
... More than 150 INTERMAGNET geomagnetic obser- vatories around the world readily provide high-quality magnetic field data with a sampling rate of up to 1 Hz (St-Louis 2012). In principle, the recorded field vari- ations ...
9
Petrology of the earth's deep crust and upper mantle and the origins of magmas in the earth and moon
... Role of crystal fractionation at or near the lunar surface in Petrogenesis of Apollo 12 basalts The atmospheric pressure melting studies, together with the chemical and mineralogical dat[r] ...
701
Crustal and Upper Mantle Density Structure Beneath the Qinghai-Tibet Plateau and Its Surrounding Areas Derived from EGM2008 Geoid Anomalies
... The absence of underground gravity observations in this region inhibits the density research progresses. However, with the development of various observation methods[13, 14], the high sensitivity, high resolution and ...
15
Short time scale heating of the Earth’s mantle by ice sheet dynamics
... From convection studies (Larsen et al., 1997, 1999) and also from shear-zone deformation modeling (Regenauer- Lieb and Yuen, 1998) there is much more viscous heating generated in a non-Newtonian rheology than in the New- ...
8
Viscosities of the crust and upper mantle constrained by three dimensional GPS rates in the Sichuan–Yunnan fragment of China
... the upper crustal deformation is decoupled from the motion of the underlying upper mantle (Clark and Royden 2000; Royden et ...the upper crust and lower crust are cou- pled, the upper ...
11
Upper mantle imaging beneath the Japan Islands by Hi net tiltmeter recordings
... the upper mantle beneath the Japanese Islands has been well mapped by receiver function (RF) analysis based on broadband seismograms (see Li et ...km upper mantle discontinuities (hereafter ...
6
A simple model for mantle driven flow at the top of Earth’s core
... of mantle control on core surface flows we use a simple model starting from thermal wind theory, which relies on a vorticity balance at the top of the core dominated by effects of rotation (Section ...the ...
10
Structure of the upper mantle in the north-western and central United States from USArray S-receiver functions
... the S phase making it difficult to obtain good S ...after S agree well with the data in ...the S signal ...radiating S waves ...stacked S-receiver functions ...an ...
14
Upper mantle velocity structure in the western Pacific rim estimated from short period recordings at Matsushiro Seismic Array System
... Existence of a low-velocity zone beneath the matured oce- anic basin has been the focus of several decades of researches in the northwestern Pacific region. While some models in this region have well-established ...
8
Probing the Earth’s Deep Interior Through Geochemistry
... unmodified mantle wedge was the same as the MORB source and that the degree of melting was on average the same as beneath mid-ocean ...rare earth, was among the least mobile of the elements we considered, ...
168
Studying local earthquakes in the area Baltic-Bothnia Megashear using the data of the POLENET/LAPNET temporary array
... The northern part of the Fennoscandian Shield is a region where the main part of the Earth’s crust was formed during Precambrian (Fig. 1b). The Palaeoproterozoic (2.5–1.6 Ga) is the most important crust-forming period. ...
14
Attenuation in the mantle, from spectral analysis of short-period seismic waves
... determined for the P and S phases of the events listed in Table 2.2. After the instrument responses (Equations 4.5 squared) were removed from each of the raw spectra the maximum values (or peak values) of the ...
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