• No results found

Crust and Mantle Models with a Single Discontinuity

Influence of the Iceland mantle plume on oceanic crust generation in the North Atlantic

Influence of the Iceland mantle plume on oceanic crust generation in the North Atlantic

... tomographic models is shown in ...acceptable models in this depth interval increases markedly, even though the overall change in traveltimes may be very ...

21

The seismic velocity structure of the crust and uppermost mantle in Sudan and East Africa

The seismic velocity structure of the crust and uppermost mantle in Sudan and East Africa

... comparable models with similarly good fits to the data are obtained for each group and for each station, indicating little variability in crustal structure around the ...

149

Computational Approaches to Localized Deformation Within the Lithosphere and for Crust Mantle Interactions

Computational Approaches to Localized Deformation Within the Lithosphere and for Crust Mantle Interactions

... numerical models for mutually approaching ridge segments with two types of loads: spreading and thermal stresses due to ...two-layer models in the previous chapter, models in Chapter 4 represent a ...

151

Determination of the Crust and  Upper Mantle Structure in Anatolia by  Surface Wave Data

Determination of the Crust and Upper Mantle Structure in Anatolia by Surface Wave Data

... classical single-station method, but now we are able to combine single- and two-station measurements as well as the ambient noise and/or group speed analysis will al- low us to better constrain both the ...

11

Regional Flow in the Lower Crust and Upper Mantle under the Southeastern Tibetan Plateau

Regional Flow in the Lower Crust and Upper Mantle under the Southeastern Tibetan Plateau

... Vs models are consistent with each other (Figure ...lower crust and no local earthquakes occurred in the upper mantle under the study region, numerous rays of head waves (Pn, Sn) from the crustal ...

9

Variations in the thickness of the crust of the Kaapvaal craton, and mantle structure below southern Africa

Variations in the thickness of the crust of the Kaapvaal craton, and mantle structure below southern Africa

... earth’s mantle form more densely-packed structures that are stable at higher ...wave models were then refined by matching results with synthetic seismograms cal- culated by the WKBJ method (Chapman, ...

13

Field T rips. Geological Vol. 6 (1.3) Crust-mantle interactions during subduction of oceanic & continental crust. Società Geologica Italiana

Field T rips. Geological Vol. 6 (1.3) Crust-mantle interactions during subduction of oceanic & continental crust. Società Geologica Italiana

... a single crystal of Cr-omphacite ± tremolite ± talc (=”smaragdite”), often surrounded by an aggregate of fine-grained omphacite; (ii) the plagioclase by jadeitic pyroxene + zoisite; (iii) the olivine by an ...

73

Crust and uppermost mantle structure beneath central Japan inferred from receiver function analysis

Crust and uppermost mantle structure beneath central Japan inferred from receiver function analysis

... It seems that the differences between the depths esti- mated by the two methods indicate complicated structures around the Moho discontinuity. Our receiver function anal- ysis basically estimated S wave structures ...

7

Using Earth Deformation Caused by Surface Mass Loading to Constrain the Elastic Structure of the Crust and Mantle

Using Earth Deformation Caused by Surface Mass Loading to Constrain the Elastic Structure of the Crust and Mantle

... The current chapter provides a basic introduction to tidal theory, including a derivation of the equilibrium tide and a decomposition of the tidal potential into individual harmonic terms. Ch. 2 reviews one of the most ...

400

Silicon isotopes reveal recycled altered oceanic crust in the mantle sources of ocean island basalts

Silicon isotopes reveal recycled altered oceanic crust in the mantle sources of ocean island basalts

... oceanic crust and lithospheric mantle lies in the difference in Si isotope composition between lavas from the Canary Islands of La Palma and El ...oceanic crust and lithospheric mantle in the ...

47

Backarc basin oceanic crust and uppermost mantle seismic velocity structure of the Shikoku Basin, south of Japan

Backarc basin oceanic crust and uppermost mantle seismic velocity structure of the Shikoku Basin, south of Japan

... velocity models show the presence of a very large horizontal irregularity related to the seamounts on the extinct spreading center, transition zones from the Shikoku Basin to Kyushu-Palau Ridge, and from the ...

5

The kinetics of the reaction of majorite plus ferropericlase to ringwoodite: Implications for mantle upwellings crossing the 660 km discontinuity

The kinetics of the reaction of majorite plus ferropericlase to ringwoodite: Implications for mantle upwellings crossing the 660 km discontinuity

... High-pressure experiments were performed in a 1000-ton split- cylinder multi-anvil press at the Bayerisches Geoinstitut using a standard 10/5 cell assembly described elsewhere (e.g. Dobson et al., 2002). Starting ...

9

Seismic study of the crust and upper mantle structure in eastern Asia using ambient noise correlation and earthquake data

Seismic study of the crust and upper mantle structure in eastern Asia using ambient noise correlation and earthquake data

... Moho discontinuity region by giving more freedom to the model where it is better constraint by short period dispersion data and receiver function, ...lower crust and deeper mantle, which are less ...

139

Heterogeneous crust and upper mantle across southern Kenya and the relationship to surface deformation as inferred from magnetoteluric imaging

Heterogeneous crust and upper mantle across southern Kenya and the relationship to surface deformation as inferred from magnetoteluric imaging

... the crust and upper mantle in southern Kenya using 2-D magnetotelluric data ...The models reconstructed using different inversion approaches show many common ...resistivity models and other ...

19

High resolution receiver function imaging of the seismic velocity discontinuities in the crust and the uppermost mantle beneath southwest Japan

High resolution receiver function imaging of the seismic velocity discontinuities in the crust and the uppermost mantle beneath southwest Japan

... 3.1 Profile a In Fig. 3(a), three portions of consecutive positive am- plitudes indicated by red in RFs can be clearly traced and we can draw three lines in Fig. 4(a). These positive ampli- tude portions are interpreted ...

6

High resolution receiver function imaging of the seismic velocity discontinuities in the crust and the uppermost mantle beneath southwest Japan

High resolution receiver function imaging of the seismic velocity discontinuities in the crust and the uppermost mantle beneath southwest Japan

... 3.1 Profile a In Fig. 3(a), three portions of consecutive positive am- plitudes indicated by red in RFs can be clearly traced and we can draw three lines in Fig. 4(a). These positive ampli- tude portions are interpreted ...

6

Understanding Lithosphere and Mantle Dynamics with Numerical Models Constrained by Observations

Understanding Lithosphere and Mantle Dynamics with Numerical Models Constrained by Observations

... Our models incorporate a true free surface, phase changes and elasto-visco-plastic ...oceanic crust all strongly influ- ence the stress state and deformation within plates, water weakening decouples the ...

161

Subduction to the lower mantle – a comparison between geodynamic and tomographic models

Subduction to the lower mantle – a comparison between geodynamic and tomographic models

... any single pa- per to address this problem globally, so improvements here should be made region by region, possibly still within a global model, but with regionally-refined plate reconstruc- tions and focusing on ...

18

The lithospheric mantle and lower crust mantle relationships under Scotland: a xenolithic perspective

The lithospheric mantle and lower crust mantle relationships under Scotland: a xenolithic perspective

... (2011) The lithospheric mantle and lower crust- mantle relationships under Scotland: a xenolithic perspective.. ISSN 0016-7649.[r] ...

49

The amount of recycled crust in sources of mantle derived melts

The amount of recycled crust in sources of mantle derived melts

... of mantle melting by adding to its heterogeneity. Mantle heterogeneity is well-established from several lines of evidence provided by isotopic and trace-element analyses of modern basaltic lavas erupted in ...

20

Show all 10000 documents...

Related subjects