Results 1 to 10 of about 1,482,837 (256)

Crystal and melt inclusion timescales reveal the evolution of magma migration before eruption [PDF]

Nature Communications, 2018
Volatile contents in melt inclusions can be used to unravel magma migration and degassing. Here, the authors use olivine chronometry and melt inclusion data from the 2008 Llaima eruption and find that magma intrusion occurred 4 years before the eruption ...
Dawn C. S. Ruth, Fidel Costa, Caroline Bouvet de Maisonneuve, Luis Franco, Joaquin A. Cortés, Eliza S. Calder   +5 more
doaj   +3 more sources

Melt- and fluid-inclusions studies in the Wunugetushan porphyry Cu–Mo deposit, NE China: Constraints on the separation of Cu and Mo

Frontiers in Earth Science, 2023
The Wunugetushan large porphyry Cu–Mo deposit in NE China is hosted by Mesozoic quartz monzonite porphyry and has a Mo-rich core and Cu-rich rim in space.
Wei Lu, Yuecheng Zhang, Jingguo Du, Jingguo Du, Zhiwei Song   +4 more
doaj   +1 more source

Volatile Content Implications of Increasing Explosivity of the Strombolian Eruptive Style along the Fracture Opening on the NE Villarrica Flank: Minor Eruptive Centers in the Los Nevados Group 2

Geosciences, 2021
Potential flank eruptions at the presently active Villarrica, Southern Andes Volcanic Zone (33.3–46 °S) require the drawing of a comprehensive scenario of eruptive style dynamics, which partially depends on the degassing process.
Philippe Robidoux, Daniela Pastén, Gilles Levresse, Gloria Diaz, Dante Paredes   +4 more
doaj   +1 more source

The Ins and Outs of Water in Olivine-Hosted Melt Inclusions: Hygrometer vs. Speedometer

Frontiers in Earth Science, 2021
The amount of water dissolved in magmas at depth beneath volcanoes is fundamental to a wide range of magmatic and eruptive processes due to water’s dominant control on magma generation, viscosity, and buoyancy.
Anna Barth, Terry Plank
doaj   +1 more source

The Missing Magmas of MOR: Insights From Phase Equilibrium Experiments on Plagioclase Ultraphyric Basalts

Geochemistry, Geophysics, Geosystems, 2022
Plagioclase ultraphyric basalts (PUBs) are a class of mid‐ocean ridge (MOR) lavas found in a variety of ocean floor environments, are characterized by abundant (15–40 volume %) plagioclase megacrysts and a diverse trace element and isotopic signature ...
Gokce K. Ustunisik, Roger L. Nielsen, David Walker   +2 more
doaj   +1 more source

Simultaneous In Situ Determination of Pb Isotope Ratios and Trace Element Concentrations in Melt Inclusions by LASS‐ICP‐MS

Geochemistry, Geophysics, Geosystems, 2021
Melt inclusions provide unique insights into magmatic sources and processes. This study presents a method for simultaneously measuring Pb isotopes and trace elements in melt inclusions using a 193 nm excimer laser ablation system coupled to a multiple ...
Le Zhang, Sheng‐Ping Qian, Nan Li, Lu‐Bing Hong, Yan‐Qiang Zhang, Zhong‐Yuan Ren   +5 more
doaj   +1 more source

Testing the Recycled Gabbro Hypothesis for the Origin of “Ghost Plagioclase” Melt Signatures Using 87Sr/86Sr of Individual Olivine‐Hosted Melt Inclusions From Hawai'i

Geochemistry, Geophysics, Geosystems, 2021
Melt inclusions with large, positive Sr anomalies have been described in multiple tectonic settings, and the origins of this unusual geochemical feature are debated.
O. E. Anderson, M. G. Jackson, E. F. Rose‐Koga, J. P. Marske, M. E. Peterson, A. A. Price, B. L. Byerly, A. A. Reinhard   +7 more
doaj   +1 more source

Effects of Vacuum-Stirring Purification Process on Al-6Mg Alloy Melt

Crystals, 2022
Aiming for hydrogen and oxidation easily produced in the melting process of Al-Mg alloys, three processes, including non-vacuum static melt treatment, non-vacuum rotary-injection purification and vacuum-stirring purification, were used to purify the Al ...
Shilin Li, Yuelong Bai, Zhifeng Zhang, Long Jiang   +3 more
doaj   +1 more source

Melt-melt immiscibility and implications for the origin of Madeira albite-rich granite, Pitinga mine, Amazonas, Brazil: A melt inclusion study

Brazilian Journal of Geology, 2022
Presented here are the results of the first studies of silicate melt inclusions hosted in quartz crystals from the two late granitic facies of the Paleoproterozoic Madeira pluton in the Pitinga mine, State of Amazonas, Brazil. The study of these magmatic
Régis Munhoz Krás Borges, Lucas Eustáquio Dias Amorim, Francisco Javier Rios, Gabrielle Cristine Silva dos Santos, Monica Elizetti Freitas, Tatiana Aparecida Fernandes de Lima, Armindo Santos, Tércio Assunção Pedrosa   +7 more
doaj   +1 more source

Aerospace Titanium Alloy Melt Process Quality Improvements [PDF]

MATEC Web of Conferences, 2020
This Jet Engine Titanium Quality Committee (JETQC) paper describes industry quality improvements since 1990. Quality refers to freedom from melt-related hard-alpha and high-density inclusions (HDI). JETQC, formed under the auspices of the U.S.
Woodfield Andrew, Lemaitre Gérard
doaj   +1 more source