scholarly journals Textural and Compositional Changes in the Lithospheric Mantle Atop the Hawaiian Plume: Consequences for Seismic Properties

2020 ◽  
Vol 21 (8) ◽  
Author(s):  
Andréa Tommasi ◽  
Lucan Mameri ◽  
Marguerite Godard
Keyword(s):  
Lithospheric Mantle ◽  
Seismic Properties ◽  
Hawaiian Plume ◽  
Compositional Changes

Petrofabric and seismic properties of lithospheric mantle xenoliths from the Calatrava volcanic field (Central Spain)

2016 ◽  
Vol 683 ◽  
pp. 200-215 ◽  
Author(s):  
P. Puelles ◽  
B. Ábalos ◽  
J.I. Gil Ibarguchi ◽  
F. Sarrionandia ◽  
M. Carracedo ◽  
...  
Keyword(s):  
Lithospheric Mantle ◽  
Volcanic Field ◽  
Mantle Xenoliths ◽  
Central Spain ◽  
Seismic Properties

Geochemistry of late Caledonian minettes from Northern Britain: implications for the Caledonian sub-continental lithospheric mantle

1996 ◽  
Vol 60 (398) ◽  
pp. 221-236 ◽  
Author(s):  
Jason C. Canning ◽  
P. J. Henney ◽  
M. A. Morrison ◽  
J. W. Gaskarth
Keyword(s):  
Trace Elements ◽  
Partial Melting ◽  
Fractional Crystallization ◽  
Lithospheric Mantle ◽  
Sr Isotope ◽  
Crustal Assimilation ◽  
Continental Lithospheric Mantle ◽  
Compositional Changes ◽  
Tectonic Dislocations

AbstractThe geochemistry of late Caledonian minettes from across the orogenic belt is compared in order to constrain the composition of the Caledonian sub-continental lithospheric mantle (SCLM). All the minettes are similar petrographically and chemically and several samples have characteristics typical of near primary mantle melts. Samples from the Northern Highlands and the Caledonian foreland show enrichment in many trace elements (notably LILE and LREE) relative to those from the Grampians, the Southern Uplands and northern England, coupled with distinct Nd and Sr isotope characteristics. Processes such as fractional crystallization, crustal assimilation, and partial melting played a negligible role in creating the differences between the two groups which reflect long-term, time-integrated differences in the compositions of their SCLM sources. The Great Glen Fault appears to represent the boundary between these two lithospheric mantle domains. Other currently exposed Caledonian tectonic dislocations cannot be correlated directly with compositional changes within the SCLM. The chemical provinciality displayed by the minettes shows some resemblance to that within other late Caledonian igneous suites, including the newer granites, suggesting that the minettes may represent the lithospheric mantle contributions to these rocks.

Seismic properties of peridotite xenoliths as a clue to imaging the lithospheric mantle beneath NE Tasmania, Australia

2012 ◽  
Vol 522-523 ◽  
pp. 218-223 ◽  
Author(s):  
K. Michibayashi ◽  
Y. Kusafuka ◽  
T. Satsukawa ◽  
S.J. Nasir
Keyword(s):  
Lithospheric Mantle ◽  
Seismic Properties ◽  
Peridotite Xenoliths

scholarly journals Deformation, Annealing, Melt‐Rock Interaction, and Seismic Properties of an Old Domain of the Equatorial Atlantic Lithospheric Mantle

Tectonics ◽  
2019 ◽  
Vol 38 (4) ◽  
pp. 1164-1188 ◽  
Author(s):  
Shiran Liu ◽  
Andréa Tommasi ◽  
Alain Vauchez ◽  
Maurizio Mazzucchelli
Keyword(s):  
Lithospheric Mantle ◽  
Equatorial Atlantic ◽  
Rock Interaction ◽  
Seismic Properties

HREM observations of internetallic alloy formation in Pt-Sn thin films

1992 ◽  
Vol 50 (1) ◽  
pp. 52-53
Author(s):  
D.C. Dufner
Keyword(s):  
Thin Films ◽  
Cross Sections ◽  
Carbon Films ◽  
Solid State Reactions ◽  
Alloy Formation ◽  
Reaction Behavior ◽  
Interdiffusion Process ◽  
Compositional Changes ◽  
General Goal ◽  
Film Method

The general goal of this research is to clarify mechanisms of solid state reactions at the atomic level as a step in the rationalization of macroscopic reaction behavior in solids. A study of intermetallic alloy formation resulting from interdiffusion of metals in thin films can be made by HREM. In this work, reactions between Pt and Sn in thin films are studied to elucidate mechanisms for structural and compositional changes during the interdiffusion process.Thin films of Pt and Sn used in this study were prepared by the two-film method introduced by Shiojiri. Few hundred angstroms of Pt were vacuum-deposited onto holey carbon films mounted on TEM grids. Sn films with an average thickness of 200Å were created by evaporation at rates of 15-30 Å/sec onto air-cleaved KBr substrates. The Sn films were wet-stripped and collected on the holey Pt grids. Figure 1 shows a cross-section schematic of a Pt-Sn couple. While this two-film arrangement did not allow observations of the actual reaction interface, microtomy was used to produce cross-sections.

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