mantle source
A primitive mantle source for the Neoarchean mafic rocks from the Tanzania Craton
... heterogeneous mantle source, consisting of a mixture of depleted mantle, similar to present-day MORB source, and LREE-enriched and HFSE- depleted mantle source, similar to that ...
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Contributions of scientific ocean drilling to understanding the emplacement of submarine large igneous provinces and their effects on the environment
... Broken Ridge (KP/BR) represent three large igneous provinces (LIPs) located in oce- anic settings. The basement lavas have been investigated through scientific ocean drill- ing and, in the case of the OJP, fieldwork on ...
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Depression Among Pregnant Latinas In South Carolina
... Indian-MORB mantle source that was sampled extensively by volcanism associated with the early IBM arc and which continues to be sampled by arc and back-arc volcanism of the modern IBM ...
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Diamonds and the Mantle Geodynamics of Carbon
... Lithospheric diamonds are ancient and form during episodes of fl uid in fi ltration into the lithospheric mantle keel in response to large-scale geotectonic processes. Studies of lithospheric diamonds provide the ...
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Geochemistry and Petrogenesis of Tertiary Volcanic Rocks of the Eastern Roodbar, Alborz Mountain, North of Iran
... nospheric mantle source in petrogenesis of the rocks in the ...MORB source towards upper continental crust (Figure ...different source regions in the petroge- nesis of ...
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The Mantle Plume Debates
... About mantle plumes, there are a lot of definitions, two of which are in the ...a mantle plume—a thin, hot column of mantle material moves up the core-mantle ...the mantle source ...
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From ocean to mantle: new evidence for U cycling with implications for the HIMU source and the secular Pb isotope evolution of Earth's mantle
... zone mantle (green-blue region in ...slab mantle serpentinite likely only accounts for a few percent of the total U budget of the supercritical liquid escaping the slab; hence, for Pb-isotope models, ...
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New Identity of the Kimberlite Melt: Constraints from Unaltered Diamondiferous Udachnaya East Pipe Kimberlite, Siberia, Russia
... parental mantle source of the Udachnaya-East kimberlite, my study explores stable isotope compositions of the kimberlite groundmass (O, C and S isotopes), chloride-carbonate nodules (O and C isotopes) and ...
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A large mantle water source for the northern San Andreas fault system: a ghost of subduction past
... shallow mantle of the Cascadia subduction margin under near-coastal Pacific Northwest, USA is cold and partially serpentinized, storing large quantities of water in this wedge-shaped ...the mantle wedge ...
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Post-collisional Ultrapotassic Mafic Magmatism in South Tibet: Products of Partial Melting of Pyroxenite in the Mantle Wedge Induced by Roll-back and Delamination of the Subducted Indian Continental Lithosphere Slab
... of mantle source components and petrogenetic processes in the generation of subduction8related ...the mantle source of the ultrapotassic mafic magmas in south ...the mantle ...
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Non-Destructive Determination of Magnetic Audio Tape Degradation for Various Tape Chemistries Using Spectroscopy and Chemometrics
... in mantle geochemistry, as they are sensitive to both the lithology of the convecting mantle, and to source hybridization in the upper mantle prior to ...convecting mantle is inferred ...
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The origin of mantle xenoliths in Tertiary alkaline basalts, British Columbia, Canada: Implications for convergent plate margin geodynamic and petrogenetic processes
... Temdjim, 2011; Liu et al., 2012; Li et al., 2014). Nkouandou and Temdjim (2011) studied the geochemistry of both spinel lherzolite and alkaline lavas associated with the Adamawa Massif, Cameroon Line, Cameroon, Africa. ...
122
From Source to Surface: The dynamics of heterogeneous mantle plumes
... lowermost mantle is driven to Earth’s surface by mantle plumes, providing a volcanic record of its structure and ...ancient mantle reservoir to that of plume ...deep- mantle source ...
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Empirical evidence for the fractionation of carbon isotopes between diamond and iron carbide from the Earth’s mantle
... There are two samples in this study from the Jagersfontein kimberlite, Kaapvaal Craton, SA [Jones et al., 2008]. They are fragmented octahedral diamond and show prominent dark metallic inclusions within opa- que diamond ...
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Pediment form and evolution in the East Kimberleys : granite, basalt, and sandstone case-studies
... that mantle-controlled planation may also operate in the East ...the mantle, and small-scale regrading to lower ...that mantle-controlled planation involves (a) surface lowering following selective ...
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Shell organic matrices in some pearl oysters and other bivalves
... It is ubiquitous in those species investigated which have no junction of Valve with External Mantle or Mantle Margin distal to the Adductor Muscle and which have a calcitic Simple Prisma[r] ...
372
Broadband modeling of earthquake source and mantle structures
... Tomographic travel-time models of the La Ristra transect produce excellent waveform fits if we amplify the blurred images into distinct structures. We observe systematic waveform distortions across the western edge of ...
147
I. Application of normal mode theory to seismic source and structure problems. II. Seismic investigations of upper mantle lateral heterogeneity.
... After a study of the physical properties of spheroidal modes leading to a rational classification, two specific problems are addressed: the observability of deep [r] ...
258
The system potassium carbonate-magnesium carbonate as an analogue to mantle carbonate melts: Experimental determination of phase relations and selected physical properties at high pressure
... Alongside | the discovery of natural evidence for mantle carbonatite melts, experimental studies have increasingly concentrated on phase relations in carbonated peridotite. Production of low percentage ...
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Potential trade offs between biomineralization and immunity revealed by shell properties and gene expression profiles of two closely related Crassostrea species
... only certain fractions of hemocytes are responsible for mineral sequestration and transport. Higher investment in biomineralization function is also apparent from the elevated expression of biomineralization-related ...
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