The petrology and geochemistry of Nyiragongo lavas of 2002, 2016, 1977 and 2017 AD, and the trace element partitioning between melilitite glass and melilite, nepheline, leucite, clinopyroxene, apatite, olivine and Fe-Ti oxides: a unique scenario
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DOI: 10.1016/j.lithos.2019.02.023
Abstract: Abstract The Nyiragongo lava of 2002, and the new one flowing from the spatter cone grown up in 2016 close to the lava lake, are melilitites (melilite-nephelinites). They have low MgO (4 wt%), are chemically almost… read more here.
Keywords: geochemistry; petrology; melilite nepheline; nepheline leucite ... See more keywords
Cr-poor and Cr-rich clinopyroxene and garnet megacrysts from southern African Group 1 and Group 2 kimberlites: Clues to megacryst origins and their relationship to kimberlites
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DOI: 10.1016/j.lithos.2021.106231
Abstract: Abstract Controversies surround the origin of kimberlite megacrysts, including whether and how they are genetically related to their host kimberlites, the relationship between the Cr-poor and Cr-rich suites and the dominant processes responsible for elemental… read more here.
Keywords: rich megacrysts; poor megacrysts; group; element ... See more keywords
The Lead-up to Mount Etna’s Most Destructive Historic Eruption (1669). Cryptic Recharge Recorded in Clinopyroxene
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DOI: 10.1093/petrology/egaa025
Abstract: An understanding of destructive historic eruptions has important implications for the assessment of active plumbing systems and the processes that might precede future hazardous eruptions. At Mount Etna (Sicily, Italy), magma production and eruption frequency… read more here.
Keywords: clinopyroxene; eruption; destructive historic; mount etna ... See more keywords
Eruptive Activity on the Western Flank of Piton de la Fournaise (La Réunion Island, Indian Ocean): Insights on Magma Transfer, Storage and Evolution at an Oceanic Volcanic Island
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DOI: 10.1093/petrology/egz045
Abstract: Petrological and geochemical (major element, trace element, Sr–Nd isotope) data for recent ( read more here.
Keywords: clinopyroxene; piton fournaise; flank piton; western flank ... See more keywords
Clinopyroxene/Melt Trace Element Partitioning in Sodic Alkaline Magmas
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DOI: 10.1093/petrology/egz052
Abstract: Clinopyroxene is a key fractionating phase in alkaline magmatic systems, but its impact on metal enrichment processes, and the formation of REE + HFSE mineralisation in particular, is not well understood. To constrain the control… read more here.
Keywords: clinopyroxene; clinopyroxene melt; alkaline magmas; element partitioning ... See more keywords
Quartz and orthopyroxene exsolution lamellae in clinopyroxene and the metamorphic P–T path of Belomorian eclogites
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Metamorphic Geology"
DOI: 10.1111/jmg.12280
Abstract: The Shirokaya Salma eclogite-bearing complex is located in the Archean-Paleoproterozoic Belomorian Province (Russia). Its eclogites and eclogitic rocks show multiple clinopyroxene breakdown textures, characterized by quartz-amphibole, orthopyroxene, and plagioclase lamellae. Representative samples, a fresh eclogite,… read more here.
Keywords: clinopyroxene; metamorphism; orthopyroxene; path ... See more keywords
A new clinopyroxene-liquid barometer, and implications for magma storage pressures under Icelandic rift zones
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DOI: 10.2138/am-2017-5968
Abstract: Abstract Pressure is one of the key variables that controls magmatic phase equilibria. However, estimating magma storage pressures from erupted products can be challenging. Various barometers have been developed over the past two decades that… read more here.
Keywords: clinopyroxene; text text; kbar; magma storage ... See more keywords
Phase diagram and thermal expansion of orthopyroxene-, clinopyroxene-, and ilmenite-structured MgGeO3
Sign Up to like & getrecommendations! Published in 2020 at "American Mineralogist"
DOI: 10.2138/am-2021-7685ccby
Abstract: Abstract The MgGeO3 system is a low-pressure analog for the Earth-forming (Mg,Fe)SiO3 system and exhibits recoverable orthopyroxene, clinopyroxene, and ilmenite structures below 6 GPa. The pressure-temperature conditions of the clinopyroxene to ilmenite phase transition are… read more here.
Keywords: phase; clinopyroxene ilmenite; temperature; clinopyroxene ... See more keywords