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June 1993 eruption of Oldoinyo Lengai, Tanzania: Exceptionally viscous and large carbonatite lava flows and evidence for coexisting silicate and carbonate magmas.

Dawson, J. B. and Pinkerton, H. and Pyle, D. M. and Nyamweru, C. (1994) June 1993 eruption of Oldoinyo Lengai, Tanzania: Exceptionally viscous and large carbonatite lava flows and evidence for coexisting silicate and carbonate magmas. Geology, 22 (9). pp. 799-802.

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Abstract

Alkali carbonatite lavas and ashes that erupted from Oldoinyo Lengai, Tanzania, in June 1993 provide evidence for coexisting carbonatite and silicate magmas. The lavas and ashes contain immiscible silicate spheroids of ijolitic composition, which themselves contain carbonatite segregations. In contrast to earlier, very mobile flows, the 1993 lava flows were very viscous; the viscosity of one crystal-rich flow is within the range for rhyolites. They are also the largest carbonatite flows yet recorded from the volcano.

Item Type: Article
Journal or Publication Title: Geology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 22413
Deposited By: ep_ss_importer
Deposited On: 03 Feb 2009 09:29
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:00
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/22413

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