Results 51 to 60 of about 24,088 (309)
Geologica Carpathica, 2015 In this paper we present the petrography and geochemistry of a recently collected lherzolite-websterite xenolith series and of clinopyroxene xenocrysts, hosted in Upper Cretaceous–Paleogene basanites of Poiana Ruscă (Romania), whose xenoliths show ...
Nédli Zsuzsanna +2 more
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Frontiers in Earth Science, 2022 The mantle beneath coastal SE China evolved from enriched to depleted between the Cretaceous and the Neogene, although the precise timing of this change remains unclear.
Chuanshun Li +7 more
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Trace-element abundances in the shallow lithospheric mantle of the North Atlantic Craton margin: implications for melting and metasomatism beneath Northern Scotland [PDF]
, 2015 Bulk rock geochemistry and major- and trace-element compositions of clinopyroxene have been determined for three suites of peridotitic mantle xenoliths from the North Atlantic Craton (NAC) in northern Scotland, to establish the magmatic and metasomatic ...
Bonadiman +18 more
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Highly depleted cratonic mantle in West Greenland extending into diamond stability field in the Proterozoic [PDF]
, 2013 This study presents electron microprobe data for dunite xenoliths from a lamprophyre dyke located on the island of Qeqertaa, West Greenland. The minimum age of this dyke is Palaeoproterozoic and it experienced amphibolite facies metamorphism and ...
Bernstein, Stefan +2 more
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Sheared lherzolite xenoliths revisited [PDF]
Journal of Geophysical Research: Solid Earth, 2008 The microstructures of sheared lherzolite xenoliths from South African kimberlites are investigated using new microstructural analysis techniques and new rheological data. By applying electron backscatter diffraction (EBSD) methods and the M‐index technique for quantifying the strength of lattice preferred orientation (LPO), it is demonstrated that ...
Philip Skemer, Shun‐ichiro Karato
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An Assessment of ^(40)Ar-^(39)Ar Dating of Incompletely Degassed Xenoliths [PDF]
, 1982 The possibility of measuring the age of eruption of Pleistocene lavas by ^(40)Ar-^(39)Ar analysis of entrapped ancient potassic xenoliths is demonstrated by a study of model systems.
Gillespie, A. R. +2 more
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Temperatures in a sinking xenolith [PDF]
Eos, Transactions American Geophysical Union, 1937 The manuscript for this paper was not submitted.
openaire +2 more sources
Geosciences, 2019 Ultramafic magmas (MgO ≥ 18 wt%) are generally thought to be primary mantle melts formed at temperatures in excess of 1600 °C. Volatile contents are expected to be low, and accordingly, high-Mg magmas generally do not yield large explosive ...
Alessandra Correale +2 more
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Cognate xenoliths in Mt. Etna lavas: witnesses of the high-velocity body beneath the volcano [PDF]
, 2013 Various xenoliths have been found in lavas of the 1763 (“La Montagnola”), 2001, and 2002–03 eruptions at Mt. Etna whose petrographic evidence and mineral chemistry exclude a mantle origin and clearly point to a cognate nature.
COCINA, O +3 more
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, 2002 EarthScope applies modern observational, analytical, and telecommunications technologies to investigate the structure and evolution of the North American continent and the physical processes controlling earthquakes and volcanic eruptions.
Michelle Hall-Wallace
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