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Dawson, J. B. (1993) A supposed sövite from Oldoinyo Lengai, Tanzania: result of extreme alteration of alkali carbonatite lava. Mineralogical Magazine, 57 (386) 93-101 doi:10.1180/minmag.1993.057.386.09

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Reference TypeJournal (article/letter/editorial)
TitleA supposed sövite from Oldoinyo Lengai, Tanzania: result of extreme alteration of alkali carbonatite lava
JournalMineralogical MagazineISSN0026-461X
AuthorsDawson, J. B.Author
Year1993 (March)Volume57
Issue386
PublisherMineralogical Society
Download URLhttps://rruff.info/doclib/MinMag/Volume_57/57-386-93.pdf+
DOIdoi:10.1180/minmag.1993.057.386.09Search in ResearchGate
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Mindat Ref. ID1891Long-form Identifiermindat:1:5:1891:7
GUID0
Full ReferenceDawson, J. B. (1993) A supposed sövite from Oldoinyo Lengai, Tanzania: result of extreme alteration of alkali carbonatite lava. Mineralogical Magazine, 57 (386) 93-101 doi:10.1180/minmag.1993.057.386.09
Plain TextDawson, J. B. (1993) A supposed sövite from Oldoinyo Lengai, Tanzania: result of extreme alteration of alkali carbonatite lava. Mineralogical Magazine, 57 (386) 93-101 doi:10.1180/minmag.1993.057.386.09
In(1993, March) Mineralogical Magazine Vol. 57 (386) Mineralogical Society
Abstract/NotesAbstractA calcite-rich block in nephelinitic agglomerate at Oldoinyo Lengai comprises Sr-calcite, apatite, fluorite, a Ba-Mn oxide akin to romanrchite, and a distinctive Mn-Fe spinel. Formerly reported as sövite, on textural, mineralogical and stable isotope grounds it is now re-interpreted as a highly-altered natrocarbonatite lava. An implication of this study is that natrocarbonatite is not just a modern phenomenon, but has been extruded from Oldoinyo Lengai for at least around 1250 years.

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Dawson, J. B. (1971) A preliminary note on eucolite from Oldoinyo Lengai, Tanzania. Mineralogical Magazine, 38 (295) 385 doi:10.1180/minmag.1971.038.295.19
Mitchell, R. H., Belton, F. A. (2008) Cuspidine-sodalite natrocarbonatite from Oldoinyo Lengai, Tanzania: a novel hybrid carbonatite formed by assimilation of ijolite. Mineralogical Magazine, 72 (6) 1261-1277 doi:10.1180/minmag.2008.072.6.1261
Dawson, J. B., Hill, P. G. (1998) Mineral chemistry of a peralkaline combeite-lamprophyllite nephelinite from Oldoinyo Lengai, Tanzania. Mineralogical Magazine, 62 (2) 179-196 doi:10.1180/002646198547567
Gittins, J., Harmer, R. E. (1997) Dawson's Oldoinyo Lengai calciocarbonatite: a magmatic sövite or an extremely altered natrocarbonatite?. Mineralogical Magazine, 61 (406) 351-355 doi:10.1180/minmag.1997.061.406.02
Mitchell, R. H., Dawson, J. B. (2007) The 24th September 2007 ash eruption of the carbonatite volcano Oldoinyo Lengai, Tanzania: mineralogy of the ash and implications for formation of a new hybrid magma type. Mineralogical Magazine, 71 (5) 483-492 doi:10.1180/minmag.2007.071.5.483
Dawson, J. B., Garson, M. S., Roberts, B. (1987) Altered former alkalic carbonatite lava from Oldoinyo Lengai, Tanzania: Inferences for calcite carbonatite lavas. Geology, 15 (8) 765 doi:10.1130/0091-7613(1987)15<765:afaclf>2.0.co;2
Dawson, J. B., Smith, J. V., Steele, I. M. (1992) 1966 ash eruption of the carbonatite volcano Oldoinyo Lengai: mineralogy of lapilli and mixing of silicate and carbonate magmas. Mineralogical Magazine, 56 (382) 1-16 doi:10.1180/minmag.1992.056.382.01
Wiedenmann, D., Zaitsev, A. N., Britvin, S. N., Krivovichev, S. V., Keller, J. (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine, 73 (3) 373-384 doi:10.1180/minmag.2009.073.3.373
Gittins, J., Jago, B. C. (1998) Differentiation of natrocarbonatite magma at Oldoinyo Lengai volcano, Tanzania. Mineralogical Magazine, 62 (6) 759-768 doi:10.1180/002646198548142
Milton, C. (1968) The "natro-carbonatite lava" of Oldoinyo Lengai, Tanzania. Geological Society of America Special Paper 121: 202 (abstract)
Dawson, J. B., Pinkerton, H., Norton, G. E., Pyle, D. M. (1990) Physicochemical properties of alkali carbonatite lavas:Data from the 1988 eruption of Oldoinyo Lengai, Tanzania. Geology, 18 (3) 260 doi:10.1130/0091-7613(1990)018<0260:ppoacl>2.3.co;2
 
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