Thin intergranular melt films and melt pockets in spinel peridotite xenoliths from the Rhön area (Germany): early stage of melt generation by grain boundary melting

1997 ◽  
Vol 129 (4) ◽  
pp. 268-283 ◽  
Author(s):  
Leander Franz ◽  
Richard Wirth
Keyword(s):  
Grain Boundary ◽  
Early Stage ◽  
Spinel Peridotite ◽  
Peridotite Xenoliths ◽  
Melt Generation ◽  
Melt Pockets

Proterozoic lithosphere in Marie Byrd Land, West Antarctica: Re–Os systematics of spinel peridotite xenoliths

2003 ◽  
Vol 196 (1-4) ◽  
pp. 131-145 ◽  
Author(s):  
Monica R. Handler ◽  
Richard J. Wysoczanski ◽  
John A. Gamble
Keyword(s):  
Spinel Peridotite ◽  
West Antarctica ◽  
Peridotite Xenoliths

Spinel-peridotite xenoliths from Kapfenstein (Graz Basin, Eastern Austria): A geochemical and petrological study

1996 ◽  
Vol 57 (1-2) ◽  
pp. 23-50 ◽  
Author(s):  
O. Vasellil ◽  
H. Downes ◽  
M. F. Thirlwall ◽  
R. Vannucci ◽  
N. Coradossi
Keyword(s):  
Spinel Peridotite ◽  
Peridotite Xenoliths ◽  
Eastern Austria

Minor elements in olivine from spinel lherzolite xenoliths: implications for thermobarometry

1997 ◽  
Vol 61 (405) ◽  
pp. 257-269 ◽  
Author(s):  
Suzanne Y. O'Reilly ◽  
D. Chen ◽  
W. L. Griffin ◽  
C. G. Ryan
Keyword(s):  
Trace Element ◽  
Garnet Peridotite ◽  
Spinel Peridotite ◽  
Spinel Lherzolite ◽  
Proton Microprobe ◽  
Minor Elements ◽  
Spinel Lherzolites ◽  
Peridotite Xenoliths ◽  
Trace Element Contents ◽  
Element Contents

AbstractThe proton microprobe has been used to determine contents of Ca, Ti, Ni, Mn and Zn in the olivine of 54 spinel lherzolite xenoliths from Australian and Chinese basalts. These data are compared with proton-probe data for Ni, Mn and Zn in the olivine of 180 garnet peridotite xenoliths from African and Siberian kimberlites. Fe, Mn, Ni and Zn contents are well-correlated; because the spinel lherzolite olivines have higher mean Fe contents than garnet peridotite olivines (average Fo89.6vs. Fo90–92) they also have lower Ni and higher Mn contents. Zn and Fe are well-correlated in garnet peridotite olivine, but in spinel peridotites this relationship is perturbed by partitioning of Zn into spinel. None of these elements shows significant correlation with temperature. Consistent differences in trace-element contents of olivines in the two suites is interpreted as reflecting the greater degree of depletion of Archean garnet peridotites as compared to Phanerozoic spinel lherzolites. Ca and Ti contents of spinel-peridotite olivine are well correlated with one another, and with temperature as determined by several types of geothermometer. However, Ca contents are poorly correlated with pressure as determined by the Ca-in-olivine barometer of Köhler and Brey (1990). This reflects the strong T-dependence of this barometer: the uncertainty in pressure (calculated by this method) which is produced by the ±50°C uncertainty expected of any geothermometer is ca ± 8 kbar, corresponding to the entire width of the spinel-lherzolite field at 900–1200°C.

Trace-element and isotopic characteristics of spinel peridotite xenoliths from Saudi Arabia

1995 ◽  
Vol 123 (1-4) ◽  
pp. 53-65 ◽  
Author(s):  
J. Blusztajn ◽  
S.R. Hart ◽  
N. Shimizu ◽  
A.V. McGuire
Keyword(s):  
Saudi Arabia ◽  
Trace Element ◽  
Spinel Peridotite ◽  
Peridotite Xenoliths

Microband-To-Microshear Band Transition near Grain Boundaries in BCC Steel

2007 ◽  
Vol 558-559 ◽  
pp. 873-878 ◽  
Author(s):  
Dorothée Dorner ◽  
Yoshitaka Adachi ◽  
Kaneaki Tsuzaki
Keyword(s):  
Grain Boundary ◽  
Crystal Orientation ◽  
Electron Backscatter Diffraction ◽  
Early Stage ◽  
Compression Tests ◽  
Grain Boundary Characteristics ◽  
Band Transition ◽  
Boundary Characteristics ◽  
Backscatter Diffraction ◽  
Initial Crystal

Compression tests were performed on Fe-3%Si specimens with few grains. The deformation microstructure and microtexture were investigated by electron backscatter diffraction (EBSD) and related to the initial crystal orientation and grain boundary characteristics. Groups of microbands were found that are characterised by a periodic change in crystal orientation, shear at the grain boundary, and the formation of new grains. It is supposed that these microband groups represent an early stage of microshear band development.

In Situ EBSP Observations of Recrystallization in Commercial Purity Aluminum

2007 ◽  
Vol 558-559 ◽  
pp. 223-228 ◽  
Author(s):  
Katsura Kajihara
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Early Stage ◽  
Boundary Motion ◽  
Commercial Purity ◽  
Solute Content ◽  
In Situ Observations ◽  
Commercial Purity Aluminum ◽  
Grain Boundary Motion

This study presents in-situ EBSP observations of recrystallization in commercial purity aluminum sheets with different concentrations of solutes and different states of precipitation. The in-situ observations demonstrate clearly the behaviors of the nucleation and growth of recrystallized grains, and the movements of grain boundaries at an early stage of recrystallization. The high mobility of grain boundaries neighboring the deformed matrix was generally observed presumably due to strain-induced grain boundaries migration. The grain boundary motion was also found to strongly depend to the solute content level. These in-situ observations provide important evidence to show that the behaviors of grain boundary motion at an early stage of recrystallization leads to the grain size distribution and the curvature of grain boundaries after the primary recrystallization.

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