 | | Journal (article/letter/editorial) | | April 2013, Vol. 77(3), pp. 213–226 Tinderet volcano, Kenya: an altered natrocarbonatite locality? A...Editor: Ray Macdonald] ABSTRACT The Tinderet volcano (19.9 to 5.5 Ma), located within the Kavirondo...include Mn-rich magnetite, magnesioferrite and jacobsite. Oxygen isotope data for bulk carbonatite samples...natrocarbonatites from the Oldoinyo Lengai and Kerimasi volcanoes that have altered and recrystallized...carbonatite, natrocarbonatite, calcite, fluorite, jacobsite, magnesioferrite, Tinderet, Oldoinyo Lengai. |  | | Report (chapter) | | have resulted from later regional mapping by the Tanzania Geological Survey, together with radiometric dating...Extrusive basaltic centres. The term ‘peralkaline volcano’ is used here to indicate that the structure is...(unpublished) state that the oldest lavas from this volcano are melanephelinites and melilitites of the Bast...Bast Hills and Birera, to the west of the main volcano. These, as with early lavas from some other centres...Ngorongoro, Oldeani, Gelai, Ketumbeine, Tarosero, Monduli and the Shira and Mawenzi centres of Kilimanjaro) |  | Zaitsev, A. N., Keller, J., Spratt, J., Perova, E. N., Kearsley, A. (2008) NYEREREITE - PIRSSONITE - CALCITE - SHORTITE RELATIONSHIPS IN ALTERED NATROCARBONATITES, OLDOINYO LENGAI, TANZANIA. The Canadian Mineralogist, 46 (4) 843-860 doi:10.3749/canmin.46.4.843 | Journal (article/letter/editorial) | | IN ALTERED NATROCARBONATITES, OLDOINYO LENGAI, TANZANIA Anatoly N. ZAITSEV§ Department of Mineralogy,...1917 explosive eruption at Oldoinyo Lengai volcano, in Tanzania. The carbonatite samples contain two mineral...calcite, shortite, nahcolite, trona, thermonatrite, jacobsite and barytocalcite. Observed relationships between...replacement, brines, solutions, Oldoinyo Lengai, Tanzania. Sommaire Des échantillons de natrocarbonatite...calcite, shortite, nahcolite, trona, thermonatrite, jacobsite et barytocalcite. Les relations observées entre |  | Reguir, E. P., Chakhmouradian, A. R., Halden, N. M., Yang, P., Zaitsev, A. N. (2008) EARLY MAGMATIC AND REACTION-INDUCED TRENDS IN MAGNETITE FROM THE CARBONATITES OF KERIMASI, TANZANIA. The Canadian Mineralogist, 46 (4) 879-900 doi:10.3749/canmin.46.4.879 | Journal (article/letter/editorial) | | TRENDS IN MAGNETITE FROM THE CARBONATITES OF KERIMASI, TANZANIA Ekaterina P. REGUIR§, Anton R. CHAKHMOURADIAN...types of calciocarbonatite from the Kerimasi volcano, in Tanzania. In all samples, magnetite is one of...%, respectively) and <15 mol.% of spinel and jacobsite. One sample of pyroclastic carbonatite also contains...addition to the magmatic evolutionary trend, the Kerimasi magnetite exhibits a previously unrecognized trend...evolutionary trend, trace elements, LA–ICP–MS, Kerimasi, Tanzania. Sommaire Nous avons examiné la distribution |  | | Journal (article/letter/editorial) | | from Calcite Carbonatite at the Kerimasi Volcano, Northern Tanzania A. N. Zaitsev Department of Mineralogy...Quaternary Kerimasi volcano located in the southern part of the Gregory Rift, north ern Tanzania, contains...some of the extrusive carbonatites at the Kerimasi volcano were originally alkaline rich and contained...Lengai volcano, which is located in the southern part of the Gregory Rift, northern Tanzania (Dawson...Woolley, 2001), including the large Keri masi volcano, Loluni cone, Loolmurwak and Kisete craters and |  | Guzmics, Tibor, Mitchell, Roger H., Szabó, Csaba, Berkesi, Márta, Milke, Ralf, Abart, Rainer (2011) Carbonatite melt inclusions in coexisting magnetite, apatite and monticellite in Kerimasi calciocarbonatite, Tanzania: melt evolution and petrogenesis. Contributions to Mineralogy and Petrology, 161 (2) 177-196 doi:10.1007/s00410-010-0525-z | Journal (article/letter/editorial) | | magnetite, apatite and monticellite in Kerimasi calciocarbonatite, Tanzania: melt evolution and petrogenesis...29 April 2010 Ó Springer-Verlag 2010 Abstract Kerimasi calciocarbonatite consists principally of calcite...Calciocarbonatite Peralkaline silicate melt Kerimasi Tanzania Electronic supplementary material The online...minerals occurring in calciocarbonatite from Kerimasi volcano (Tanzania). These rocks consist principally of...natrocarbonatites. Kerimasi is a stratovolcano located in the Gregory Rift Valley, Northern Tanzania (2°510 S; |  | Káldos, Réka, Guzmics, Tibor, Mitchell, Roger H., Dawson, John Barry, Milke, Ralf, Szabó, Csaba (2015) A melt evolution model for Kerimasi volcano, Tanzania: Evidence from carbonate melt inclusions in jacupirangite. Lithos, 238. 101-119 doi:10.1016/j.lithos.2015.09.011 | Journal (article/letter/editorial) | | A melt evolution model for Kerimasi volcano, Tanzania: Evidence from carbonate melt inclusions...Szabó, Csaba, A melt evolution model for Kerimasi volcano, Tanzania: Evidence from carbonate melt inclusions...MANUSCRIPT A melt evolution model for Kerimasi volcano, Tanzania: Evidence from carbonate melt IP T...compositions are similar to the parental melt of Kerimasi calciocarbonatite. Silicate-carbonate liquid immiscibility...A melt evolution model has been developed for Kerimasi. ACCEPTED MANUSCRIPT Abstract This study presents |  | | Journal (article/letter/editorial) | | (2006) CALCIOCARBONATITE DYKES AT OLDOINYO LENGAI, TANZANIA: THE FATE OF NATROCARBONATITE Jörg KELLER§ Institut...from the active natrocarbonatite volcano Oldoinyo Lengai, Tanzania. The dykes are fine grained, with...mineralogy, chemical balance, stable isotopes, Tanzania. Sommaire Nous décrivons pour la première fois...valley, is the world’s only active carbonatite volcano and is well known for the unusually alkali-rich...natrocarbonatite (Dawson 1993). At Kerimasi, Lengai’s southern neighbor volcano, both intrusive and extrusive |  | Guzmics, Tibor, Mitchell, Roger H., Szabó, Csaba, Berkesi, Márta, Milke, Ralf, Ratter, Kitti (2012) Liquid immiscibility between silicate, carbonate and sulfide melts in melt inclusions hosted in co-precipitated minerals from Kerimasi volcano (Tanzania): evolution of carbonated nephelinitic magma. Contributions to Mineralogy and Petrology, 164 (1) 101-122 doi:10.1007/s00410-012-0728-6 | Journal (article/letter/editorial) | | hosted in co-precipitated minerals from Kerimasi volcano (Tanzania): evolution of carbonated nephelinitic...nepheline-rich rock (afrikandite) from Kerimasi volcano (Tanzania). Temperatures are estimated to be 1...Carbonatite Natrocarbonatite Nephelinite Kerimasi Tanzania Introduction Carbonatite and associated...lite rock (afrikandite) collected at Kerimasi Volcano, Tanzania. The melt inclusions show that during...the parental melt of calciocarbonatite found at Kerimasi (Guzmics et al. 2011) and other localities (Wooley |  | | Journal (article/letter/editorial) | | large Kisingiri nephelinite-carbonatite volcano, Homa Bay District, western Kenya (0º34’S; 34º09’E) contains...relationship with the nephelinites of the Kisingiri volcano. Two hypotheses are discussed. A rising silicate...the Oldoinyo Lengai G. ROSATELLI ETAL. volcano (Tanzania) erupts carbonatite lavas today (Dawson, 1962...much effort has been devoted to the study of this volcano, but the lavas it produces are natrocarbonatite...~16 Ma Rangwa Caldera Complex of the Kisingiri volcano, consisting of over 350 hand specimens collected |  | | Book | | Carbonatites - Tanzania - Oldoinyo Lengai Region - Congresses. ism - Tanzania - Oldoinyo Lengai Region - Congresses...Congresses. 3. Oldoinyo Lengai (Tanzania) I. Bell, Keith, 1938- . II. Keller, J. (J6rg), 1938III. Series...on June 3rd, 1991, in a nuee ardente from Unzen Volcano in Japan. The Kraffts' interest in volcanoes was...carbonatitic nature of its lavas was recognized, that the volcano took on special significance in volcanology and...the East African rift in northern Tanzania near the Kenya-Tanzania border, south of Lake Natron, and |  | Hurai, Vratislav, Huraiová, Monika, Slobodník, Marek, Thomas, Rainer (2015) Geofluids - Developments in Microthermometry, Spectroscopy, Thermodynamics, and Stable Isotopes. Elsevier. doi:10.1016/c2014-0-03099-7 | Book | | fluid and ultimately crystallizes at 123 °C. The region between 42 and 123 °C is a “no-man’s land,” within...the vapor-saturated halite liquidus. The L + G region is subdivided into smaller parts by isoplethal...thus encompassing the outer surface of the L + G region. The isoplethal loops are subdivided into boiling... The fluid B remains homogeneous in the shaded region. majority of natural brine inclusions correspond...composition. Hence, each point within the twophase L + G region has its own unique combination of the coexisting |
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