Results 11 to 20 of about 3,752 (234)

Tracking deep crust by zircon xenocrysts within igneous rocks from the northern Alxa, China: Constraints on the southern boundary of the Central Asian Orogenic Belt [PDF]

open access: yesJournal of Asian Earth Sciences, 2015
The southern boundary of the central segment of the Central Asian Orogenic Belt (CAOB) with the Precambrian Alxa Block is not well constrained due to poor recognition of deep crust.
Jianjun Zhang, Jian-Xin Zhao
exaly   +3 more sources

Xenocrysts and megacrysts of alkali olivine-basalt-basanite-nephelinite association makhtesh ramon (israel): interaction with transporting magmas and morphological adjustment [PDF]

open access: yesЛитосфера, 2018
Xenocrysts and megacrysts hosted in the rocks of Early Cretaceous olivine-basalt-basanite-nephelinite association that outcropped in erosion crater of Makhtesh Ramon (Natural Reserve of Mishmar ha-Nagev, Israel) are the topic of the current research ...
Zinovi Yudalevich, Yevgeny Vapnik
doaj   +2 more sources

Thermal State, Thickness, and Composition of the Lithospheric Mantle beneath the Upper Muna Kimberlite Field (Siberian Craton) Constrained by Clinopyroxene Xenocrysts and Comparison with Daldyn and Mirny Fields

open access: yesMinerals, 2020
To gain better insight into the thermal state and composition of the lithospheric mantle beneath the Upper Muna kimberlite field (Siberian craton), a suite of 323 clinopyroxene xenocrysts and 10 mantle xenoliths from the Komsomolskaya-Magnitnaya (KM ...
Anna M. Dymshits   +8 more
semanticscholar   +2 more sources

Toledoite, TiFeSi, a New Mineral from Inclusions in Corundum Xenocrysts from Mount Carmel, Israel [PDF]

open access: yesCrystals
During our nanomineralogical investigation of melt inclusions in corundum xenocrysts from the Mount Carmel area, Israel, seven new oxide and alloy minerals have been discovered since 2021.
Chi Ma   +3 more
doaj   +2 more sources

Metasomatic origin of garnet xenocrysts from the V. Grib kimberlite pipe, Arkhangelsk region, NW Russia [PDF]

open access: yes, 2017
This paper presents new major and trace element data from 150 garnet xenocrysts from the V. Grib kimberlite pipe located in the central part of the Arkhangelsk diamondiferous province (ADP).
E. Shchukina, A. Agashev, N. Pokhilenko
semanticscholar   +2 more sources

The Sytykanskaya kimberlite pipe: Evidence from deep-seated xenoliths and xenocrysts for the evolution of the mantle beneath Alakit, Yakutia, Russia [PDF]

open access: yes, 2015
Mantle xenoliths (>150) and concentrates from late autolithic breccia and porphyritic kimberlite from the Sytykanskaya pipe of the Alakit field (Yakutia) were analyzed by EPMA and LAM ICP methods.
I. Ashchepkov   +11 more
semanticscholar   +2 more sources

Petrological features of picrobasaltic melts on Lanzarote, Canary Islands [PDF]

open access: yesE3S Web of Conferences, 2021
The paper discusses issues related to the petrology of picrobasaltic melts forming lava flows on Lanzarote, Canary Islands. During ascientific and educational expedition on the aforementioned island, lava flows of picro basalt of the third phase of the ...
Canhimbue L.S.   +2 more
doaj   +1 more source

Zircon Xenocrysts from the Shaka Ridge Record Ancient Continental Crust: New U-Pb Geochronological and Oxygen Isotopic Data

open access: yesJournal of earth sciences, 2022
Over the past two decades, a significant number of discoveries of ancient zircon xenocrysts in ocean-floor magmatic rocks have been reported. These findings provide compelling evidence for the presence of ancient continental crust within young oceanic ...
S. Skublov   +5 more
semanticscholar   +1 more source

High‐Pressure Carbonaceous Phases as Minerals

open access: yesGeophysical Monograph Series, Page 11-23., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Oliver Tschauner
wiley  

+2 more sources

FURTHER STUDY OF GARNET XENOCRYSTS IN NEW YORK CITY MIGMATITES [PDF]

open access: yesGeological Society of America Abstracts with Programs, 2017
The authors have previously published an article at the 2004 Geological Society of America Annual Meeting, Petrogenetic Significance of Garnets in the Bedrock of New York City, in which they suggested that the garnet xenocrysts observed in the ...
Stanley Schleifer, Nazrul I. Khandaker
core   +4 more sources

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