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Evolution of natrocarbonatite from a wollastonite nephelinite parent: Evidence from the June, 1993 eruption of Oldoinyo Lengai, Tanzania

Abstract:

Lapilli and unusually thick, high viscosity lavas extruded from Oldoinyo Lengai in June, 1993 are composed of crystal-rich natrocarbonatite containing a small proportion of porphyritic silicate spheroids. The silicate spheroids are of wollastonite nephelinite mineralogy, but they also contain natrocarbonatite mineral grains and aggregates (a) in glass inclusions within nepheline and pyroxene phenocrysts, and (b) within the fine-grained silicate groundmass of the spheroids. The chemical relati...

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Publication status:
Published

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Publisher copy:
10.1086/629800

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Institution:
University of Oxford
Division:
MPLS
Department:
Earth Sciences
Role:
Author
Journal:
JOURNAL OF GEOLOGY More from this journal
Volume:
104
Issue:
1
Pages:
41-54
Publication date:
1996-01-01
DOI:
EISSN:
1537-5269
ISSN:
0022-1376
Pubs id:
pubs:165099
UUID:
uuid:71df4c5c-c6fa-4d45-8d2d-297a2d4aa6e8
Local pid:
pubs:165099
Source identifiers:
165099
Deposit date:
2012-12-19

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