Results 81 to 90 of about 9,703 (232)

Provenance Reassessment of Eocene Turbidites, New Caledonia: Inferences for Obduction Models

Geochemistry, Geophysics, Geosystems
Provenance of pre‐obduction Eocene turbidites from New Caledonia is used to better constrain their geodynamic context and inform debate on subduction polarity.
Dominique Cluzel, France Pattier, Renjie Zhou, Sébastien Meffre, Jonathan C. Aitchison, Pierre Maurizot, Maximilien Mathian, Jean‐Luc Devidal   +7 more
doaj   +1 more source

Pyroxenites and Megacrysts From Alkaline Melts of the Calatrava Volcanic Field (Central Spain): Inferences From Trace Element Geochemistry and Sr-Nd Isotope Composition

Frontiers in Earth Science, 2020
Alkaline volcanic rocks from explosive monogenetic centers often carry an unusual cargo of crystals and rock fragments, which may provide valuable constraints on magma source, ascent and eruption.
Carlos Villaseca, Carlos Villaseca, Javier García Serrano, David Orejana   +3 more
doaj   +1 more source

An evaluation of garnet-clinopyroxene geothermometry in granulites [PDF]

Contributions to Mineralogy and Petrology, 1983
Four new formulations of the garnet-clinopyroxene geothermometer (Ellis and Green 1979; Ganguly 1979; Saxena 1979; Dahl 1980) have been evaluated in the Adirondacks and five other granulite terranes using results from 94 mineral pairs. The Saxena and Ganguly formulations give temperatures that are generally 100–150° C above those constrained by phase ...
Bohlen, S. R., Johnson, C. A., Essene, E J.   +2 more
openaire   +2 more sources

Crystallographic orientations and timing relationships of clinopyroxene inclusions in diamond [PDF]

, 2022
Diamonds are the deepest “fragments” of the primordial Earth that reach the Earth’s surface after traveling a long path through the interior of our planet.
Antignani, Pia
core  

Trace element thermometry of garnet-clinopyroxene pairs

, 2016
We present major and trace element data on coexisting garnet and clinopyroxene from experiments carried out between 1.3 and 10 GPa and 970 and 1400 °C.
JD Blundy (15955763), JR Pickles (21851174), RA Brooker (15964637)   +2 more
core   +2 more sources

Petrogenesis of Tarq-Mazdeh volcanic rocks based on clinopyroxene chemistry (South of Natanz, Urumieh Dokhtar volcanic belt)

Journal of Economic Geology, 2019
Introduction Clinopyroxene is one of the most common of the rock forming minerals. Its long formation period (from the earliest crystallization of magma in the core of phenocrysts to the final microcrystalline crystallization in the rock background) can
Marzieh Ghadirpour, Jamshid Ahmadian, Shahzad Sherafat, Mohammad Ali Mackizadeh   +3 more
doaj   +1 more source

Distinctive Crystal-chemistry and Site Configuration of the Clinopyroxene From Alkali Basaltic Rocks - the Nyambeni Clinopyroxene Suite, Kenya

, 1986
A crystal chemical investigation of clinopyroxenes from a suite of nepheline-bearing lavas located in the Nyambeni Range of Kenya has delineated the polyhedral site configurations and related intracrystalline relationships.
MOLIN, GIANMARIO, D. ULIANA, E. M. PICCIRILLO, A. CUNDARI, DAL NEGRO, ALBERTO   +4 more
core   +1 more source

Partitioning of trace elements between plagioclase, clinopyroxene and melt [PDF]

, 2017
This study focusses on the partitioning of trace elements between plagioclase, clinopyroxene and equilibrium melt. Such mineral/melt partition coefficients are widely used to model petrogenetic processes in igneous systems. However,
Schoneveld, Louise Elizabeth
core   +1 more source

Progressively Fenitised Schist and Carbonatitic Clasts From a Metasomatic Aureole Beneath the Alkalic Dunedin Volcano, Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Clasts of albite‐porphyroblastic quartzofeldspathic schist, derived from the Otago Schist basement, occur within the Port Chalmers Breccia, a diatreme at the centre of the Dunedin stratovolcano, New Zealand. Schists have undergone varying degrees of replacement reactions (at temperatures of 300° to >500°C) producing hornfelses, with Ca‐ and K‐enriched ...
Alan F. Cooper
wiley   +1 more source

Clinopyroxene based glasses and glass-ceramics for functional applications

, 2009
Doutoramento em Ciência e Engenharia de MateriaisAs piroxenas são um vasto grupo de silicatos minerais encontrados em muitas rochas ígneas e metamórficas.
Goel, Ashutosh
core