Results 151 to 160 of about 112,950 (202)

Mantle xenolith perspectives.

, 1987
There are records of approx 3500 basaltic xenolith localities and a similar number of kimberlitic occurrences, although actual figures are much greater. The xenoliths group into: spinel-bearing peridotites from alkali basalts from oceanic, circum-oceanic, and young continental (rift) regions; spinel-garnet peridotites from peralkaline basaltic rocks in
Nixon, P. H., Davies, G. R.
core   +3 more sources

Frozen melt–rock reaction in a peridotite xenolith from sub-arc mantle recorded by diffusion of trace elements and water in olivine [PDF]

Earth and Planetary Science Letters, 2015
Inferring the ambient state of the lithospheric mantle from xenoliths may be misleading if the magmatic activity responsible for the exhumation has modified the xenolith.
Joerg Hermann, H Şt C O'Neill
exaly   +2 more sources

Xenolith evidence for lithospheric melting above anomalously hot mantle under the northern Canadian Cordillera

Contributions To Mineralogy and Petrology, 1998
A comparison of mantle xenolith suites along the northern Canadian Cordillera reveals that the xenoliths from three suites exhibit bimodal populations whereas the xenoliths from the other four suites display unimodal populations.
Andrew Frederiksen, Don Francis
exaly   +2 more sources

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Zircon in mantle eclogite xenoliths: a review

Geological Magazine, 2021
AbstractVery few zircon-bearing, kimberlite-hosted mantle eclogite xenoliths have been identified to date; however, the zircon they contain is crucial for our understanding of subcratonic lithospheric mantle evolution and eclogite genesis. In this study, we constrain the characteristics of zircon from mantle eclogite xenoliths based on existing ...
Aleksey E. Melnik, Nester M. Korolev, Sergey G. Skublov, Dirk Müller, Qiu-Li Li, Xian-Hua Li   +5 more
openaire   +1 more source

MANTLE XENOLITHS IN THE MATSOKU KIMBERLITE PIPE

Physics and Chemistry of the Earth, 1975
Abstract The chemical compositions of selected xenoliths from the Matsoku pipe and many constituent minerals are discussed. It is concluded that the xenoliths form a closely related suite of rocks of differing mineralogy and chemistry which could have been produced during a single igneous event in the mantle. It is likely that at solidus temperatures
J.J. Gurney, B. Harte, K.G. Cox
openaire   +1 more source

Fluid inclusions in mantle xenoliths

Lithos, 2001
Abstract Fluid inclusions in olivine and pyroxene in mantle-derived ultramafic xenoliths in volcanic rocks contain abundant CO2-rich fluid inclusions, as well as inclusions of silicate glass, solidified metal sulphide melt and carbonates. Such inclusions represent accidentally trapped samples of fluid- and melt phases present in the upper mantle, and
Tom Andersen, Else-Ragnhild Neumann
openaire   +1 more source

The applicability of garnet–orthopyroxene geobarometry in mantle xenoliths

Lithos, 2011
Abstract The various existing garnet–orthopyroxene geobarometers calibrated based on the Al 2 O 3 or Cr 2 O 3 components in orthopyroxene buffered by coexisting garnet for mantle xenoliths, abbreviated as Al 2 O 3 -barometer and Cr 2 O 3 -barometer, respectively, have been extensively studied, to test their precision by applying them to phase ...
Zhao, G, Wu, CM
openaire   +3 more sources

Mantle(?) xenoliths in the carbonatites of northern Transbaikalia

Geochemistry International, 2007
The composition and nature of high-Cr minerals in lithic clasts from the carbonatites of the Veseloe occurrence, northern Transbaikalia, were considered. In order to determine their source, the Cr-bearing phases were compared with chromite, magnetite, and rutile from ultrabasic rocks, mantle xenoliths, and eclogites.
G. S. Ripp, A. G. Doroshkevich, M. V. Badmatsyrenov, N. S. Karmanov   +3 more
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Geochemistry and petrology of Victorian mantle xenoliths

2021
This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
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The carbon isotope geochemistry of mantle xenoliths

Earth-Science Reviews, 2002
Abstract Carbon occurs in mantle samples in several chemical, mineralogical and morphological forms. It has been observed as CO 2 , CH 4 and CO in fluid inclusions, as carbonate, graphite, diamond, moissanite, solid solution in silicates, and organic compounds.
openaire   +1 more source