Results 1 to 10 of about 824 (171)

Deciphering metasomatic events beneath Mindszentkálla (Bakony-Balaton Highland Volcanic Field, western Pannonian Basin) revealed by single-lithology and composite upper mantle xenoliths

open access: yesFrontiers in Earth Science, 2022
Single-lithology and composite xenoliths from Mindszentkálla (Bakony-Balaton Highland Volcanic Field) in the Carpathian-Pannonian region record geochemical evolution of the subcontinental lithospheric mantle.
Levente Patkó   +16 more
doaj   +1 more source

THE NATURE OF ULTRAMAFIC XENOLITHS IN THE BASALTS OF LANZAROTE ISLAND (CANARY ARCHIPELAGO)

open access: yesГеодинамика и тектонофизика, 2022
Mineralogical and geochemical study was performed on peridotite xenolith hosted by amygdaline basalts of Lanzarote Island (Canary archipelago). Their modal composition corresponds to harzburgite.
V. A. Krylova   +2 more
doaj   +1 more source

New evidence for upper Permian crustal growth below Eifel, Germany, from mafic granulite xenoliths [PDF]

open access: yesEuropean Journal of Mineralogy, 2021
Granulite xenoliths from the Quaternary West Eifel Volcanic Field in Germany record evidence of magmatism in the lower crust at the end of the Permian. The xenoliths sampled two distinct bodies: an older intrusion (ca.
C. S. J. Shaw
doaj   +1 more source

Whole rock and mineral chemistry of hornblenditic xenoliths in volcanic alkaline rocks from the northern part of Uromieh Dokhatar magmatic belt (NW Iran)

open access: yesComptes Rendus. Géoscience, 2021
An alkaline volcanic activity with a relative Plio-Quaternary age (based on the succession of layers on the field) occurred in the northern part of Uromieh Dokhatar magmatic belt, Iran.
Khezerlou, Ali Akbar   +5 more
doaj   +1 more source

Mantle Xenoliths

open access: yesEos, Transactions American Geophysical Union, 1989
Mantle Xenoliths, edited by Peter H. Nixon, provides a valuable summary of both the state of our knowledge of mantle xenoliths and the current interpretations of them. It is generally well edited and surprisingly well integrated for a large, multiauthored volume.Useful integrating features include introductory sections (by Nixon) an d a summary chapter
  +5 more sources

Transport and eruption of mantle xenoliths creates a lagging problem

open access: yesCommunications Earth & Environment, 2023
Mantle-derived xenoliths entrained by low viscosity magmas indicate transport through great thicknesses of orogenic (≲50-80 km) and cratonic ( $$\lesssim$$ ≲ 20 km) mantle lithosphere.
James K. Russell, Thomas J. Jones
doaj   +1 more source

Geology and geochemistry of the Redrock Granite and anorthosite xenoliths (Proterozoic) in the northern Burro Mountains, Grant County, New Mexico, USA [PDF]

open access: yesBulletin of the Geological Society of Finland, 2002
Mineral ages from the A-type granites and anorthosite xenoliths in the Redrock area in the northwestern Burro Mountains in southwestern New Mexico cluster around ~1220–1225 Ma and provide yet another example of bimodal igneous activity during this time ...
V.T. McLemore   +5 more
doaj   +1 more source

An ion microprobe U-Th-Pb study of zircon xenocrysts from the Lahtojoki kimberlite pipe, eastern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2001
Eleven relatively large (diameter 1–2 mm) zircon grains extracted from the Lahtojoki kimberlite pipe (Eastern Finland Kimberlite Province) have been analysed by the ion microprobe NORDSIM for their U- and Pb- isotopic composition.
P. Peltonen, I. Mänttäri
doaj   +1 more source

Preservation of water concentration in mantle xenoliths: a case study from Allègre and Ray Pic volcanoes (French Massif Central) [PDF]

open access: yesEuropean Journal of Mineralogy
Water in the form of hydrous point defects in the crystal structure of pyroxenes from mantle xenoliths is frequently used to trace the water content in the lithospheric mantle.
K. Thomaidis   +6 more
doaj   +1 more source

Pyroxene chemistry of xenoliths related to volcanic rocks in the Eslamieh Peninsula (Saray volcano): Implications for geothermobarometry and tectonic setting [PDF]

open access: yesعلوم زمین خوارزمی, 2023
The high K-volcanic rocks of the Eslamieh Peninsula (Saray) are exposed in the northwestern Urumieh-Dokhtar magmatic belt. They mainly include phonolitic lavas and related xenoliths.
Pouya Besharati   +2 more
doaj  

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