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Carbonatite ring-co...
Carbonatite ring-complexes explained by caldera-style volcanism
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- Andersson, Magnus (författare)
- Uppsala universitet,Geofysik
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- Malehmir, Alireza (författare)
- Uppsala universitet,Geofysik
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- Troll, Valentin R. (författare)
- Uppsala universitet,Berggrundsgeologi
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- Dehghannejad, Mahdieh (författare)
- Uppsala universitet,Geofysik
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- Juhlin, Christopher, 1956- (författare)
- Uppsala universitet,Geofysik,Geophysics
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- Ask, Maria (författare)
- Luleå tekniska universitet,Geovetenskap och miljöteknik,Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, Sweden
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(creator_code:org_t)
- 2013-04-17
- 2013
- Engelska.
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 3
- Relaterad länk:
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https://www.nature.c...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Carbonatites are rare, carbonate-rich magmatic rocks that make up a minute portion of the crust only, yet they are of great relevance for our understanding of crustal and mantle processes. Although they occur in all continents and from Archaean to present, the deeper plumbing system of carbonatite ring-complexes is usually poorly constrained. Here, we show that carbonatite ring-complexes can be explained by caldera-style volcanism. Our geophysical investigation of the Alnö carbonatite ring-complex in central Sweden identifies a solidified saucer-shaped magma chamber at ∼3 km depth that links to surface exposures through a ring fault system. Caldera subsidence during final stages of activity caused carbonatite eruptions north of the main complex, providing the crucial element to connect plutonic and eruptive features of carbonatite magmatism. The way carbonatite magmas are stored, transported and erupt at the surface is thus comparable to known emplacement styles from silicic calderas.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- Applied Geology
- Tillämpad geologi
- Geovetenskap med inriktning mot mineralogi, petrologi och tektonik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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