Search results for " xenoliths"

showing 2 items of 12 documents

Cognate xenoliths in Mt. Etna lavas: witnesses of the high-velocity body beneath the volcano

2013

Various xenoliths have been found in lavas of the 1763 (“La Montagnola”), 2001, and 2002–03 eruptions at Mt. Etna whose petrographic evidence and mineral chemistry exclude a mantle origin and clearly point to a cognate nature. Consequently, cognate xenoliths might represent a proxy to infer the nature of the high-velocity body (HVB) imaged beneath the volcano by seismic tomography. Petrography allows us to group the cognate xenoliths as follows: i) gabbros with amphibole and amphibole-bearing mela-gabbros, ii) olivine-bearing leuco-gabbros, iii) leuco-gabbros with amphibole, and iv) Plg-rich leuco gabbros. Geobarometry estimates the crystallization pressure of the cognate xenoliths between …

geographygeography.geographical_feature_categoryCognate xenoliths Gabbro Geobarometry Rock density P-wave velocity Mt. EtnaGabbroGeochemistrySettore GEO/07 - Petrologia E PetrografiaMantle (geology)PetrographyVolcanoGeochemistry and PetrologySeismic tomographyXenolithSedimentologyAmphiboleGeology
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Micro-thermometry and minerochemical composition of ultramafic xenoliths and minerals from Mt. Vulture volcano (southern Italy)

2022

Here minerochemical composition and micro-thermometric data of ultramafic xenoliths (wehrlite) and loose xenocrysts (olivine and Cr-diopside) from the last melilitite-carbonatite explosive volcanic activity of Mt. Vulture volcano. In addition, some geometrical parameters of pelletal lapilli are reported.

mantle xenolithsMinerochemistry Mt. Vulture volcanoSettore GEO/07 - Petrologia E PetrografiaMicro-thermometrySettore GEO/08 - Geochimica E Vulcanologia
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