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Magmatic differenti...
Magmatic differentiation processes at Merapi Volcano : inclusion petrology and oxygen isotopes
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- Troll, Valentin (författare)
- Uppsala universitet,Berggrundsgeologi
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- Deegan, Frances (författare)
- Uppsala universitet,Berggrundsgeologi
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- Jolis, Ester Muños (författare)
- Uppsala universitet,Berggrundsgeologi
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- Harris, C. (författare)
- Dept. of Geological Science, University of Cape Town, Rondebosch 7701, South Africa
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- Chadwick, J.P. (författare)
- Dept of Petrology (FALW), De Boelelaan 1085, Amsterdam, The Netherlands
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- Gertisser, R. (författare)
- School of Physical and Geographical Sciences, Keele University, Keele, ST5 5BG, UK
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- Scharzkopf, L.M. (författare)
- GeoDocCon, Unterpferdt 8, 95176 Konradsreuth, Germany
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- Borisova, A.Y. (författare)
- Observatoire Midi-Pyrénées, Université Toulouse, 14 Avenue E. Belin, 31400 Toulouse, France
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- Bindeman, I.N. (författare)
- Dept. of Geological Sciences, 1272 University of Oregon, Eugene, OR 97403, United States
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- Sumarti, S. (författare)
- Volcano Investigation and Technology Development Institution, Yogyakarta, Indonesia
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- Preece, K. (författare)
- School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK
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(creator_code:org_t)
- Elsevier, 2013
- 2013
- Engelska.
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Ingår i: Journal of Volcanology and Geothermal Research. - : Elsevier. - 0377-0273 .- 1872-6097. ; 261:SI, s. 38-49
- Relaterad länk:
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Indonesian volcano Merapi is one of the most hazardous volcanoes on the planet and is characterised by periods of active dome growth and intermittent explosive events. Merapi currently degasses continuously through high temperature fumaroles and erupts basaltic-andesite dome lavas and associated block-and-ash-flows that carry a large range of magmatic, coarsely crystalline plutonic, and meta-sedimentary inclusions. These inclusions are useful in order to evaluate magmatic processes that act within Merapi's plumbing system, and to help an assessment of which phenomena could trigger explosive eruptions. With the aid of petrological, textural, and oxygen isotope analysis we record a range of processes during crustal magma storage and transport, including mafic recharge, magma mixing, crystal fractionation, and country rock assimilation. Notably, abundant calc-silicate inclusions (true xenoliths) and elevated δ18O values in feldspar phenocrysts from 1994, 1998, 2006, and 2010 Merapi lavas suggest addition of limestone and calc-silicate materials to the Merapi magmas. Together with high δ13C values in fumarole gas, crustal additions to mantle and slab-derived magma and volatile sources are likely a steady state process at Merapi. This late crustal input could well represent an eruption trigger due to sudden over-pressurisation of the shallowest parts of the magma storage system independently of magmatic recharge and crystal fractionation. Limited seismic precursors may be associated with this type of eruption trigger, offering a potential explanation for the sometimes erratic behaviour of Merapi during volcanic crises.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Nyckelord
- Merapi Volcano; Magmatic and crustal inclusions; Oxygen isotopes; Crustal contamination
- Endogenous earth sciences
- Endogen geovetenskap
- Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
- Geovetenskap med inriktning mot mineralogi, petrologi och tektonik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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- Av författaren/redakt...
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Troll, Valentin
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Deegan, Frances
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Jolis, Ester Muñ ...
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Harris, C.
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Chadwick, J.P.
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Gertisser, R.
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visa fler...
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Scharzkopf, L.M.
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Borisova, A.Y.
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Bindeman, I.N.
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Sumarti, S.
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Preece, K.
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visa färre...
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NATURVETENSKAP
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Uppsala universitet