Results 71 to 80 of about 13,004 (219)

A Microkrystite from the Australasian Tektite/Microtektite Strewn Field

Meteoritics &Planetary Science, EarlyView.
Abstract Microkrystites are glassy impact spherules. They contain primary crystallites carrying information on the physical and chemical conditions prevailing during vaporization, melting, and ejection in large impact cratering events. We report on the geochemistry and mineralogy down to nanometer scale of the first microkrystite (ODP1144A,14) from the
Matteo Del Rio, Luigi Folco, Matteo Masotta, Ana Černok, Enrico Mugnaioli   +4 more
wiley   +1 more source

Microstructural Relationship between Olivine and Clinopyroxene in Ultramafic Rocks from the Red Hills Massif, Dun Mountain Ophiolite

, 2023
The microstructural relationship between olivine and clinopyroxene is significant in recovering the mantle evolution under clinopyroxene-saturated melting conditions. This study focuses on olivine/clinopyroxene-related ultramafic rocks (dunite, wehrlite,
Rui Gao, Marianne Negrini, Cai Liu, Yilun Shao   +3 more
core   +1 more source

FLUORINE PARTITIONING BETWEEN QUADRILATERAL CLINOPYROXENES AND MELT

Geological Society of America Abstracts with Programs, 2020
Abstract Concentrations of fluorine and chlorine were measured in glasses (quenched melts) and coexisting clinopyroxene, orthopyroxene, olivine, and plagioclase in run products of experiments previously used to measure sulfur partitioning between these phases.
Don R. Baker, Sara Callegaro, Angelo De Min, Martin J. Whitehouse, Andrea Marzoli   +4 more
openaire   +4 more sources

(Table S4) Clinopyroxene compositions of Pito Deep samples

, 2008
(Table S4) Clinopyroxene compositions of Pito Deep ...
Karson, Jeffrey A, Kerri L Heft (6964520), Gillis, Kathryn M, Kathryn M Gillis (6960233), Pollock, Meagen A, Klein, Emily M, Heft, Kerri L, Meagen A Pollock (6960047), Jeffrey A Karson (6960053), Emily M Klein (6960050)   +9 more
core   +1 more source

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

The Lages diatremes: mineral composition and petrological implications

Anais da Academia Brasileira de Ciências, 2007
Chemical data of heavy minerals from Lages diatremes in southern Brazil have been studied with the aim of characterizing the sample source(s). Three groups of minerals are recognized: I) aluminian-chromian pyroxene, pyrope garnet and chromian spinel ...
Giancarlo Barabino, Celso B. Gomes, Gianbosco Traversa   +2 more
doaj   +1 more source

Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO2 Controls, Retentivity, and Implications for Electrical Conductivity and Deep H2O Recycling

Geochemistry, Geophysics, Geosystems, 2023
Kimberlite‐borne eclogite xenoliths having Precambrian oceanic crustal protoliths and entrained from ≥100 km depth can retain pristine geochemical features despite extended residence in the cratonic lithospheric mantle, making them valuable archives of ...
Sonja Aulbach, Roland Stalder, Malcolm Massuyeau, Richard A. Stern, Dmitri A. Ionov, Andrey V. Korsakov   +5 more
doaj   +1 more source

Experimental Evaluation and Optimisation of Sealed‐Tube Combustion Methods for Silicate Nitrogen Extraction

Rapid Communications in Mass Spectrometry, Volume 41, Issue 1, 15 January 2027.
ABSTRACT Rationale Nitrogen (N) abundance and isotopic compositions in silicate rocks are commonly measured by sealed‐tube continuous‐flow isotope ratio mass spectrometry (CF‐IRMS), but combustion protocols vary widely. It remains uncertain how the quality of data obtained from different published methods compares for differing sample types. Methods To
Fawn S. M. Holland, Sami Mikhail, Kirsten W. Y. Wong, Abu Saeed Baidya, Eva E. Stüeken   +4 more
wiley   +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

Mineral chemistry, thermobarometry and tectonomagmatic setting of Late-Cretaceous volcanic rocks from the Kojid area (south of Lahijan, northern Alborz) [PDF]

پترولوژی, 2018
The volcanic rocks of Kojid area (south of Lahijan) crop out in northern Alborz. They show mainly pillow structure with numerous cross-cutting dykes. Based on lithostratigraphic relationships and interpillow pelagic limestones, the volcanics are Late ...
morteza delavari, Razieh Moradi, Amir Ali Tabbakh Shabani   +2 more
doaj   +1 more source