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Kerimasi

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Journal Article
Published: 01 December 2011
Mineralogical Magazine (2011) 75 (6): 2813-2822.
...A. N. Zaitsev; A. R. Chakhmouradian; O. I. Siidra; J. Spratt; C. T. Williams; C. J. Stanley; S. V. Petrov; S. N. Britvin; E. A. Polyakova Abstract Cerianite-(Ce), ideally CeO 2 , occurs as rounded grains up to 5 μm across in a block of highly altered calcite carbonatite lava from the Kerimasi...
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Journal Article
Published: 01 October 2010
Mineralogical Magazine (2010) 74 (5): 803-820.
...} \(\mathrm{Fe}_{2}^{3+}\) \end{document} Si)O 12 , is a new calcium zirconium silicate-ferrite member of the garnet group from the extinct nephelinitic volcano Kerimasi and surrounding explosion craters in northern Tanzania. The mineral occurs as subhedral crystals up to 100 μm in size in calcite...
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Journal Article
Published: 01 August 2008
The Canadian Mineralogist (2008) 46 (4): 879-900.
...Ekaterina P. Reguir; Anton R. Chakhmouradian; Norman M. Halden; Panseok Yang; Anatoly N. Zaitsev Abstract Nous avons examiné la distribution, la zonation et la composition de la magnétite et autres minéraux du groupe du spinelle dans trois types de calciocarbonatite provenant du volcan Kerimasi...
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Journal Article
Journal: Geology
Published: 01 October 1983
Geology (1983) 11 (10): 599-602.
...Richard L. Hay Abstract Carbonatite tephra was discharged in the final eruptive phase of Kerimasi, an extinct nephelinite volcano in the eastern rift valley of northern Tanzania. The tephra was dominantly of alkali carbonatite composition, thus providing the first well-documented example...
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A: Raman image of fluid bubble (from <b>Kerimasi</b> volcano, Tanzania) before exp...
in > Geology
Published: 15 April 2019
Figure 2. A: Raman image of fluid bubble (from Kerimasi volcano, Tanzania) before exposure by focused ion beam–scanning electron microscopy (FIB-SEM); silm—silicate melt; natrite ss —natrite solid solution. B: Secondary electron image of exposed fluid bubble acquired during FIB-SEM. Note
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A: Relationship of studied carbonate melts (from <b>Kerimasi</b> volcano, Tanzania...
in > Geology
Published: 15 April 2019
Figure 4. A: Relationship of studied carbonate melts (from Kerimasi volcano, Tanzania) to calcite liquidus as a function of fluorine concentration of melt, shown in (Na 2 CO 3 +K 2 CO 3 )–CaCO 3 ( T - X 1 ) pseudo-binary diagram. Black solid and dotted lines are phase field boundaries at 0.1
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Panoramic view of <b>Kerimasi</b> volcano, Loolmurwak crater and Oldoinyo Lengai v...
Published: 01 October 2010
F ig . 1. Panoramic view of Kerimasi volcano, Loolmurwak crater and Oldoinyo Lengai volcano. The direction of view is to the west (photo by S.V. Petrov).
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Simplified geological map of <b>Kerimasi</b> volcano (after  Hay 1983 ), showing s...
Published: 01 August 2008
F ig . 1. Simplified geological map of Kerimasi volcano (after Hay 1983 ), showing sample locations: (1) K5 and K6, (2) K 94–29. Loolmurwak, Kiseta and Embagai are maar-type explosion craters, and Loluni is a cratered tuff ring.
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REPRESENTATIVE COMPOSITIONS OF MAGNETITE FROM <b>KERIMASI</b> CARBONATITES
Published: 01 August 2008
TABLE 3. REPRESENTATIVE COMPOSITIONS OF MAGNETITE FROM KERIMASI CARBONATITES
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REPRESENTATIVE COMPOSITIONS OF MAGNETITE FROM <b>KERIMASI</b> CARBONATITES
Published: 01 August 2008
TABLE 3. REPRESENTATIVE COMPOSITIONS OF MAGNETITE FROM KERIMASI CARBONATITES
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REPRESENTATIVE COMPOSITIONS OF MAGNETITE FROM <b>KERIMASI</b> CARBONATITES
Published: 01 August 2008
TABLE 3. REPRESENTATIVE COMPOSITIONS OF MAGNETITE FROM KERIMASI CARBONATITES
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REPRESENTATIVE COMPOSITIONS OF MAGNETITE FROM <b>KERIMASI</b> CARBONATITES
Published: 01 August 2008
TABLE 3. REPRESENTATIVE COMPOSITIONS OF MAGNETITE FROM KERIMASI CARBONATITES
Journal Article
Journal: Geology
Published: 15 April 2019
Geology (2019) 47 (6): 527-530.
...Figure 2. A: Raman image of fluid bubble (from Kerimasi volcano, Tanzania) before exposure by focused ion beam–scanning electron microscopy (FIB-SEM); silm—silicate melt; natrite ss —natrite solid solution. B: Secondary electron image of exposed fluid bubble acquired during FIB-SEM. Note...
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Journal Article
Published: 01 May 2015
Journal of the Geological Society (2015) 172 (3): 368-389.
... and 40 Ar/ 39 Ar ages, new 40 Ar/ 39 Ar ages, and geochemical and Sr–Nd–Pb isotopic analyses on samples collected from several volcanoes distributed across the NTD: Burko, Monduli, Tarosero, Ketumbeine, Gelai, Kerimasi and Meru. The locus of volcanism over this period progressed from the southwestern...
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Journal Article
Published: 01 April 2013
Mineralogical Magazine (2013) 77 (3): 213-226.
... indicate that the Tinderet carbonatites are similar to natrocarbonatites from the Oldoinyo Lengai and Kerimasi volcanoes that have altered and recrystallized to form calcite carbonatites. These data support the hypothesis that some of the Tinderet carbonatites were originally alkali-rich rocks which...
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REPRESENTATIVE COMPOSITIONS OF REACTION-INDUCED RIMS AND SPINEL MANTLES ON ...
Published: 01 August 2008
TABLE 4. REPRESENTATIVE COMPOSITIONS OF REACTION-INDUCED RIMS AND SPINEL MANTLES ON MAGNETITE FROM CARBONATITES, KERIMASI, TANZANIA
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Geological map of the central and northern parts of the Gregory rift and it...
Published: 01 April 2013
F ig . 1. Geological map of the central and northern parts of the Gregory rift and its vicinity, showing the locations of the Tinderet, Oldoinyo Lengai and Kerimasi volcanoes [after Williams ( 1969 )]. For a geological map of Tinderet see Deans and Roberts ( 1984 ).
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Stable carbon and oxygen isotope compositions for the carbonatites from Tin...
Published: 01 April 2013
F ig . 5. Stable carbon and oxygen isotope compositions for the carbonatites from Tinderet (this work), Kerimasi (this work; Vinogradov et al. , 1970 , 1971 ), Oldoinyo Lengai ( Keller and Zaitsev, 2006 ) and Buru ( Onuonga et al. , 1997 ). Lines join fractions from the same samples.
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Calcite composition, plotted as Na 2 O  vs . SrO, from Tinderet (this study...
Published: 01 April 2013
F ig . 6. Calcite composition, plotted as Na 2 O vs . SrO, from Tinderet (this study), Kerimasi (this study; Zaitsev, 2010 ) and Oldoinyo Lengai ( Keller and Zaitsev, 2006 ; Zaitsev and Keller, 2006 ; Zaitsev et al. , 2008 ).
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Inclusion of nyerereite (dark grey) in magnetite (light grey); arrows show ...
Published: 01 August 2008
F ig . 13. Inclusion of nyerereite (dark grey) in magnetite (light grey); arrows show veinlets and veins of calcite; other minerals are pyrochlore (white cubic crystal) and pyrrhotite (white triangular crystal). Kerimasi volcano, sample K 1 [BM 1995,P6(1)]. BSE.