Results 11 to 20 of about 43,981 (268)

Phase Diagrams of Carbonate Materials at High Pressures, with Implications for Melting and Carbon Cycling in the Deep Earth

open access: yesGeophysical Monograph Series, Page 137-165., 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 ...
Konstantin Litasov   +3 more
wiley  

+3 more sources

PHYSICO-CHEMICAL CONDITIONS OF CRYSTALLIZATION OF MINERALS-PHENOCRYSTS IN BASALTIC COMPLEXES HOSTING MASSIVE SULFIDE DEPOSITS OF THE URALS AND SIBERIA [PDF]

open access: yesМинералогия, 2020
The paper discusses the physico-chemical formation conditions of minerals-phenocrysts in basaltic complexes, which host massive sulfide deposits of the Urals and Siberia. It is found as a result of study of melt inclusions that clinopyroxene from basalts
V.A. Simonov, V.V. Maslennikov
doaj   +1 more source

Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton [PDF]

open access: yes, 2004
Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
Abidin, M.S.Z.   +11 more
core   +4 more sources

Environmental Effects of Volcanic Volatile Fluxes From Subaerial Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 103-116., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Tamsin A. Mather, Anja Schmidt
wiley  

+1 more source

Mafic macrocrysts of ultrabasic alkaline dikes from the Mantiqueira Range, SE, Brazil: tracers of a complex plumbing system

open access: yesBrazilian Journal of Geology, 2020
Macrocryst assemblages of porphyritic alkaline dikes in the Mantiqueira range (SE Brazil) are mainly composed of clinopyroxene and olivine with different origins.
Júlio César Lopes da Silva   +4 more
doaj   +1 more source

Machine Learning Thermo‐Barometry: Application to Clinopyroxene‐Bearing Magmas

open access: yesJournal of Geophysical Research: Solid Earth, 2020
We introduce a new approach, based on machine learning, to estimate pre‐eruptive temperatures and storage depths using clinopyroxene‐melt pairs and clinopyroxene‐only chemistry.
M. Petrelli, L. Caricchi, D. Perugini
semanticscholar   +1 more source

An olivine-clinopyroxene geothermometer

open access: yesContributions to Mineralogy and Petrology, 1976
The olivine-clinopyroxene (Fe-Mg partition) geothermometer of Powell and Powell (1974) was derived on the basis of clinopyroxene mixing parameters which imply a large miscibility gap in CaFeSi2O6-CaMgSi2O6-CaAl2SiO6 clinopyroxenes at 950° C. Application of the Powell and Powell thermometer in an empirical way (ignoring likely errors in mixing ...
Powell, Roger, Powell, Marjorie
openaire   +1 more source

Crystallization conditions of two adjacent epidote + diopside-bearing granitic stocks, northeastern Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2021
The Tamboril and Olho d’Água granitic stocks are part of the abundant calc-alkalic magmatic epidote-bearing granitic rocks in the Cachoeirinha–Salgueiro Terrane (CST) in the Transversal Zone Domain, northeastern Brazil. The equigranular Olho d’Água stock
RENAN SIQUEIRA   +2 more
doaj   +1 more source

Retrogression of ultrahigh-pressure eclogite, Western Gneiss Region, Norway [PDF]

open access: yesEuropean Journal of Mineralogy, 2023
The Western Gneiss Region (WGR) in western Norway exposes ultrahigh-pressure (UHP) eclogites that occur repeatedly, within an area of high-pressure (HP) eclogites, without evidence of being separated by tectonic shear or ductile flow structures.
D. Spengler   +4 more
doaj   +1 more source

The formation of boundary clinopyroxenes and associated glass veins in type B1 CAIs [PDF]

open access: yes, 2009
We used focused ion beam thin section preparation and scanning transmission electron microscopy (FIB/STEM) to examine the interfacial region between spinel and host melilite for spinel grains in type B1 inclusions from the Allende and Leoville ...
Abreu   +83 more
core   +1 more source

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