Mathematics – Logic
Scientific paper
Jun 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgrb..108.2298z&link_type=abstract
Journal of Geophysical Research Solid Earth, Volume 108, Issue B6, pp. ECV 7-1, CiteID 2298, DOI 10.1029/2002JB002140
Mathematics
Logic
8
Planetary Sciences: Volcanism (8450), Volcanology: Eruption Mechanisms, Volcanology: Magma Migration
Scientific paper
Pure CO2 fluid inclusions are observed in quartz xenoliths from four lava flows in the Island of Vulcano, corresponding to distinct activity stages during the last 120 kyr. Xenoliths, which consist of aggregates of quartz grains, are present in lavas of contrasting composition ranging from basaltic-andesites to rhyolites. Two main generations of CO2 inclusions are observed: early (type I) inclusions were trapped prior to the ascent of the host xenoliths, while type II inclusions were trapped during the ascent into the host magma. Fluid inclusions show a bimodal distribution of homogenisation temperatures, corresponding to two distinct density intervals: 0.89-0.52 g/cm3(type I) and 0.42-0.13 g/cm3(type II). Type I inclusions indicate pressures of 0.56-0.33 GPa (21-13 km), relating to the levels of xenolith entrapment in the host lavas. Type II fluid inclusions show considerably lower pressures ranging from 0.14 to 0.03 GPa (5.5-3 km). Present data suggest ponding of mantle-derived magmas in at least two distinct reservoirs, located at lower crustal depths and at shallow levels, respectively. Combined fluid inclusion and petrological data suggest that the deep reservoirs were the sites of extensive fractional crystallization, mixing with source-derived magmas, and various degrees of crustal assimilation. Evolutionary processes also occurred inside shallow magma chambers, in which deep magma mixed with residing melts and rested for short periods of time before being erupted to the surface.
Frezzotti Maria-Luce
Peccerillo Angelo
Zanon Vittorio
No associations
LandOfFree
Magmatic feeding system and crustal magma accumulation beneath Vulcano Island (Italy): Evidence from CO2 fluid inclusions in quartz xenoliths does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magmatic feeding system and crustal magma accumulation beneath Vulcano Island (Italy): Evidence from CO2 fluid inclusions in quartz xenoliths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magmatic feeding system and crustal magma accumulation beneath Vulcano Island (Italy): Evidence from CO2 fluid inclusions in quartz xenoliths will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1867368