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Sink or swim: The fate of crustal xenoliths in shallow magma chambers
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Berggrundsgeologi.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Berggrundsgeologi.
Faculty of Earth Sciences, J. W. Goethe Universität, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Berggrundsgeologi.
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(Engelska)Ingår i: Artikel i tidskrift (Övrigt vetenskapligt) Submitted
Nyckelord [en]
xenolith, magmatic stoping, assimmilation, magma contamination, pluton emplacement, magma chamber dynamics
Nationell ämneskategori
Geologi
Identifikatorer
URN: urn:nbn:se:uu:diva-171485OAI: oai:DiVA.org:uu-171485DiVA, id: diva2:511084
Tillgänglig från: 2012-03-19 Skapad: 2012-03-19 Senast uppdaterad: 2017-01-25
Ingår i avhandling
1. Understanding Crustal Volatiles: Provenance,  Processes and Implications
Öppna denna publikation i ny flik eller fönster >>Understanding Crustal Volatiles: Provenance,  Processes and Implications
2012 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Knowledge of the provenance of crustal volatiles and the processes by which they are released is extremely important for the dynamics of magmatic systems. Presented here are the results of multiple investigations, which aim to understand magmatic volatile contamination from contrasting but complementary perspectives. The main methodologies used include He and C isotope values and CO2/3He ratios of volcanic gases and fluids; simulation of magma-carbonate interaction using high-pressure high-temperature experimental petrology; X-ray microtomography of vesiculated xenoliths and computer modeling.

Findings show that the contribution from upper crustal volatiles can be substantial, and is dependant on the upper crustal lithology on which a volcano lies, as well as the composition of the magma supplied. Carbonate dissolution in particular is strongly controlled by the viscosity of the host magma. The details of the breakdown of vesiculated xenoliths is complex but has wide reaching implications, ranging from the dissemination of crustally derived materials through a magma body to highlighting that crustal volatiles are largely unaccounted for in both individual volcano and global volatile budgets. In synthesizing the conclusions from each of the individual perspectives presented, I propose the contribution of volatiles from crustal sources to play a significant role in many geological systems. This volatile component should be taken into consideration in future research efforts.

Ort, förlag, år, upplaga, sidor
Uppsala: Acta Universitatis Upsaliensis, 2012. s. 37
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 912
Nyckelord
crustal volatiles, helium, carbon, volcanic gases and fluids, xeno-pumice, magma-carbonate interaction, upper crustal contamination
Nationell ämneskategori
Geokemi Geologi
Identifikatorer
urn:nbn:se:uu:diva-171486 (URN)978-91-554-8311-1 (ISBN)
Disputation
2012-05-04, Hambergsalen, Geocentrum, Villavägen 16, 752 36 Uppsala, 10:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2012-04-11 Skapad: 2012-03-19 Senast uppdaterad: 2012-04-19

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