Petrology of mugearite-hawaiite: Early extrusives in the 1973 Heimaey eruption, Iceland

S. P. Jakobsson, A.K. Pedersen, J.G. Rönsbo, L. Melchior Larsen

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

39 Citationer (Scopus)

Abstrakt

Rocks which erupted during the first few weeks are described and chemical analyses of rocks and microprobe analyses of minerals are presented. An outline of the eruption history and of the geology of the area is given. A gradational change in chemistry from mugearitic to hawaiitic composition is recorded. Xenoliths of hypersthene gabbro not cognate with magma were discovered in the mugearite. One xenolith has reacted with the mugearite magma at depth to form pargasitic hornblende and kaersutite. It is argued that the magma reacted with the xenoliths at a total pressure well below 8-9 kbar and at a gas pressure higher 1 kbar.

OriginalsprogEngelsk
Sider (fra-til)203-214
Antal sider12
TidsskriftLithos
Vol/bind6
Udgave nummer2
DOI
StatusUdgivet - 1973
Udgivet eksterntJa

Programområde

  • Programområde 4: Mineralske råstoffer

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