Results 1 to 10 of about 87,697 (345)

Dependence of the Hydration of the Lunar Surface on the Concentrations of TiO₂, Plagioclase, and Spinel [PDF]

Remote Sensing, 2021
We investigate the interrelation between the hydration of the lunar regolith and the mineral composition of the surface of the Moon with respect to the concentrations of plagioclase, TiO2 (highly correlated with the oxide mineral ilmenite), and Mg-spinel.
Marcel Hess, Christian Wöhler, Alexey A. Berezhnoy, Janice L. Bishop, Vladislav V. Shevchenko   +4 more
doaj   +2 more sources

In-situ Sr isotope disequilibrium in plagioclases from Late Cenozoic basalts in Leiqiong area: Evidence for the role of the Hainan plume and mantle metasomatism due to a paleo-subduction event

Frontiers in Earth Science, 2023
The origin of the EM2 (enriched mantle 2)-type reservoir beneath the Southeast Asia is controversial. In this study, we present new in-situ major and trace element (olivine, clinopyroxene, and plagioclase), and Sr isotopic compositions (plagioclase) for ...
Shuang-Shuang Chen, Shuang-Shuang Chen, Shuang-Shuang Chen, Shuang-Shuang Chen, Duo-Yang Wu, Duo-Yang Wu, Duo-Yang Wu, Rui Gao, Rui Gao, Rui Gao, Qiuming Cheng, Qiuming Cheng, Jia-Qi Liu   +12 more
doaj   +2 more sources

Plagioclase‐Saturated Melt Hygrothermobarometry and Plagioclase‐Melt Equilibria Using Machine Learning

Geochemistry, Geophysics, Geosystems
Compositions of plagioclase‐melt pairs are commonly used to constrain temperatures (T), dissolved water contents (H2O) and pressures (P) of pre‐eruptive magma storage and transport.
K. S. Cutler, M. Cassidy, J. D. Blundy
doaj   +3 more sources

Petrogenesis of Plagioclase Ultraphyric Basalts (PUB) From the Northeastern (NE) Pacific Ridge System: Evidence From Mineral Textures and Geochemical Characteristics

Geochemistry, Geophysics, Geosystems
Plagioclase crystals in plagioclase ultraphyric basalts (PUB) record changes in the major, trace, and isotopic compositions of evolving magmas. Those changes represent the record of specific processes in the crust and upper mantle that impart distinct ...
John B. Hewitt, Gokce K. Ustunisik, Roger L. Nielsen   +2 more
doaj   +2 more sources

CRYSTALLIZATION CONDITIONS OF PLAGIOCLASE IN VOLCANIC COMPLEXES OF SULAWESI ISLAND, PACIFIC OCEAN [PDF]

Минералогия, 2023
Mineralogical and thermobarogeochemical studies allowed us to reveal the crystallization conditions of plagioclase in volcanic complexes of Sulawesi Island (Pacific Ocean).
A.V. Kotlyarov, N.V. Dmitrieva, V.A. Simonov, I.Yu. Safonova, N.S. Karmanov, I.R. Nizametdinov   +5 more
doaj   +1 more source

Thermobar: An open-source Python3 tool for thermobarometry and hygrometry

Volcanica, 2022
We present Thermobar, a new open-source Python3 package for calculating pressures, temperatures, and melt compositions from mineral and mineral-melt equilibrium.
Penny Wieser, Maurizio Petrelli, Jordan Lubbers, Eric Wieser, Sinan Ozaydin, Adam Kent, Christy Till   +6 more
doaj   +1 more source

Micro-Textural Controls on Magma Rheology and Vulcanian Explosion Cyclicity

Frontiers in Earth Science, 2021
Understanding the relationship between degassing, crystallization processes and eruption style is a central goal in volcanology, in particular how these processes modulate the magnitude and timing of cyclical Vulcanian explosions in intermediate magmas ...
Amelia A. Bain, Jackie E. Kendrick, Jackie E. Kendrick, Anthony Lamur, Yan Lavallée, Eliza S. Calder, Joaquín A. Cortés, Gloria Patricia Cortés, Diego Gómez Martinez, Roberto A. Torres   +9 more
doaj   +1 more source

A literature review on thermodynamic sorption models of radionuclides with some selected granitic minerals

Frontiers in Nuclear Engineering, 2023
The literature for radionuclide sorption on four common granitic minerals have been surveyed. Mainly, such studies were modelling using Thermodynamic Sorption Models were investigated. Although the studies give a far from concerted results, they agree on
Stellan Holgersson, Pawan Kumar
doaj   +1 more source

The Polumir granite: Addititional data on its origin [PDF]

Geološki Anali Balkanskoga Poluostrva, 2002
The Polumir granite is exposed on several localities due to erosion, and its chemical and mineral composition is presented in this paper. It is built of K-feldspar, plagioclase, myrmekite, metasomatic albite, biotite, muscovite and quartz, while apatite,
Vukov Milenko S., Milovanović Dragan
doaj   +1 more source

Mineralogy of anorthosite veins and host gabbros in the Kal-e-Kafi intrusive body (northeast of Anarak, Isfahan Province, Central Iran)

Journal of Economic Geology, 2022
Introduction In the northeastern part of the Isfahan province and 65 km northeast of the Anarak city (Kal-e-Kafi area), an I-type granitoid pluton cross cut the Paleozoic metamorphic rocks and Eocene volcanic rocks. In the contact of this granitoid body
Hanan Salim, Ghodrat Torabi , Nargess Nosouhian   +2 more
doaj   +1 more source