 | | Journal (article/letter/editorial) | | lavas at early stage of rift initiation (Hanang volcano, North Tanzanian Divergence) Céline Baudouin1 ·...Oldoinyo Lengai and Kerimasi volcanoes. Hanang volcano is the southernmost volcano in the North Tanzanian...the earliest stage of rift initiation. Hanang volcano erupted silica-undersaturated alkaline lavas with...andradite-schorlomite, titanite, apatite, and pyrrhotite. Lavas are low MgO-nephelinite with low Mg# and...Engineering, University of Dar Es Salaam, Dar Es Salaam, Tanzania open system with carbonate–silicate immiscibility |  | | 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 |  | Campeny, Marc, Kamenetsky, Vadim S., Melgarejo, Joan C., Mangas, José, Manuel, José, Alfonso, Pura, Kamenetsky, Maya B., Bambi, Aurora C.J.M., Gonçalves, Antonio O. (2015) Carbonatitic lavas in Catanda (Kwanza Sul, Angola): Mineralogical and geochemical constraints on the parental melt. Lithos, 232. 1-11 doi:10.1016/j.lithos.2015.06.016 | Journal (article/letter/editorial) | | carbonatite lavas have been identified in this region and considering the mineralogical, textural and...natrocarbonatite localities worldwide such as Tinderet or Kerimasi, leading to our ACCEPTED MANUSCRIPT conclusion...1984; Zaitsev et al., 2013) or Kerimasi and Oldoinyo Lengai in Tanzania (Hay, 1983; Church, 1996; Guzmics...Oldoinyo Lengai is the only active carbonatite volcano known, and ACCEPTED MANUSCRIPT where unique natrocarbonatite...western African MA margin, are in a tectonic region affected by the break-up of Gondwana (Issa Filho |  | | Journal (article/letter/editorial) | | forsterite–phlogopite ijolites at Oldoinyo Lengai Volcano, Tanzania: study of melt inclusions V.S. Sekisova a...minerals of ijolite xenoliths at Oldoinyo Lengai Volcano. Melt inclusions with different phase compositions...addition, diopside contains sulfide inclusions (pyrrhotite ± chalcopyrite ± djerfisherite ± galena ± pentlandite)...the Gulf of Aden through Ethiopia, Kenya, and Tanzania, is divided into two large tectonic zones: Western...example, Oldoinyo Lengai, which is located in Tanzania, ~16 km south of Lake Natron, near the Crater |  | | Journal (article/letter/editorial) | | in modern natrocarbonatites of Oldoinyo Lengai volcano (e.g., Dawson, 1962; Fleischer et al., 1975; Gittins...Ca-carbonatite minerals from Vulture (Stoppa et al, 2009), Kerimasi (Zaitsev, 2010b), and Tinderet CE P (Zaitsev...(iv) calciocarbonatite and jacupirangite from Kerimasi volcano (Guzmics et al. 2011; Káldos et al. 2015)...1998; Zaitsev et al., 2004; Sokolov et al., 2006), Kerimasi rocks (Guzmics et al., 2011; Káldos et al., 2015)...perovskite, Al-spinel, ilmenite, rutile, magnetite, pyrrhotite and pentlandite. However Na-K-Ca, Na-Ca carbonate |  | 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...replacement, brines, solutions, Oldoinyo Lengai, Tanzania. Sommaire Des échantillons de natrocarbonatite...Methods Oldoinyo Lengai volcano, situated in the Gregory rift, northern Tanzania, is well known for the...natrocarbonatites include barite, khanneshite, sphalerite, pyrrhotite, galena, monticellite, neighborite and niocalite–cuspidine |  | | Journal (article/letter/editorial) | | pyrochlore (up to 6%), magnetite (~5%), and pyrrhotite (~5%). Phlogopite is observed as a minor mineral...phlogopite, tetraferriphlogo pite, magnetite, and pyrrhotite (Table 1). Calcite con tains admixtures of SrO...and magnetite from carbonatite of the Kerimasi Volcano, Tanzania (900–1000°C) [6]. After cooling, inclusions...and magnetite from carbonatite of the Kerimasi Volcano, Tanzania [6]. 440 ANDREEVA The high concentration |  | Zaitsev, A.N., Marks, M.A.W., Wenzel, T., Spratt, J., Sharygin, V.V., Strekopytov, S., Markl, G. (2012) Mineralogy, geochemistry and petrology of the phonolitic to nephelinitic Sadiman volcano, Crater Highlands, Tanzania. Lithos, 152. 66-83 doi:10.1016/j.lithos.2012.03.001 | Journal (article/letter/editorial) | | phonolitic to nephelinitic Sadiman volcano, Crater Highlands, Tanzania A.N. Zaitsev a, b,⁎, M.A.W. Marks...Mineral stability fields Sadiman volcano a b s t r a c t Sadiman volcano is located in the Crater Highlands...Highlands area of northern Tanzania, which lies next to the western escarpment of the Gregory rift—a part...All rights reserved. 1. Introduction Sadiman volcano (3°11′S, 35°25′E), also known as Satiman, is part...forming the Crater Highlands area in northern Tanzania (Fig. 1a) (Dawson, 2008). This area lies next |  | | Journal (article/letter/editorial) | | observed tendency for initial melts within any given region to exhibit trace element characteristics consistent...over an extended interval, which close to the Tanzania craton, has resulted in a layered lithospheric...characteristics of magma suites from throughout the region form arrays that broadly converge on the composition... Journal Pre-proof linked to the presence of the Tanzania craton and it’s reworked margin (MacDonald et...silica-undersaturation in -p lavas associated with the Tanzania craton. However, the specific causes for these |  | Uher, Pavel, Milovská, Stanislava, Milovský, Rastislav, Koděra, Peter, Bačík, Peter, Bilohuščin, Vladimír (2015) Kerimasite, {Ca3}[Zr2](SiFe3+2)O12 garnet from the Vysoká-Zlatno skarn, Štiavnica stratovolcano, Slovakia. Mineralogical Magazine, 79 (3) 715-733 doi:10.1180/minmag.2015.079.3.15 | Journal (article/letter/editorial) | | carbonatite rocks of the Kerimasi volcano and surrounding explosion craters (Tanzania) in the East-Africa...The Cu-Au skarn-porphyry mineralization in this district is related to granodiorite and quartzdiorite porphyry...carbonates with magnetite, hematite, sulfide minerals (pyrrhotite, pyrite, chalcopyrite, sphalerite, molybdenite)...Sabazia, Italy (Schingaro et al., 2001) and Kerimasi, Tanzania (Zaitsev et al., 2010). A moderate surplus...kerimasite from its type locality (the Kerimasi carbonatite volcano and adjacent alluvial sediments), represents |  | | Journal (article/letter/editorial) | | cones 10-15 km in diam eter and up to 2 km high (Kerimasi, Oldoinyo Lengai, Toror, Jombo, Hanang, and Burko...Burko, Esimingor, Elgon, and Tinderet). Only Kerimasi volcano is almost entirely composed of carbonatite...Lengai, Njamlagira, Njirogongo Bunyaruguru, Katwe, Kerimasi, Fort Portal uttrabasic-alkali and carbonate...(Meru, Gelai, and Kenya) or of carbonatite type (Kerimasi, Oldoinyo Lengai, Mosonik, Hanang, and Quaraha)...the calcite by dolo mite, and the magnetite by pyrrhotite, while the apatite and pyrochlore dissolve and |  | | Journal (article/letter/editorial) | | Gregory Rift Valley (northern Tanzania) PT and is the only active volcano erupting natrocarbonatite lava...Woolley, 2003). Oldoinyo Lengai (Tanzania) is the sole active volcano that erupts carbonatites and provides...natrocarbonatite volcano in the world, is situated within the Gregory Rift Valley in northern Tanzania. Between...minerals identified within the groundmass are pyrrhotite, PT Fe-alabandite MnS, Mn-sphalerite (Zn,Fe)S...schorlomite, nepheline, clinopyroxene, titanite, and pyrrhotite. The chemical compositions of the kernels are |  | | Journal (article/letter/editorial) | | phlogopite, and titanomagnetite enclosing blabs of pyrrhotite. Rims of monticellite, gehlenite, and reinhardbraunsite...periclase, hydroxylapatite, perovskite, spinel, pyrrhotite, and barite. The lava was readily altered; where...sparse anhedral grains, to 5 pm i of barite and pyrrhotite. The mode of the groundmass, estimated from transmitted...apatite 10%, periclase 3%, perovskite 2%, barite, pyrrhotite, and spinel < 1%. Near vesicles and fractures...reported by Mariano and Roeder (1983, p. 455) in Kerimasi carbonatite. Hydroxylapatite (Table 3) closely |  | | Journal (article/letter/editorial) | | transformation of Oldoinyo Lengai natrocarbonatites, Tanzania Anatoly N. Zaitsev a,b,c,⁎, Jörg Keller c a Department...is common for the active northern crater of the volcano. Reaction of hot (54–141 °C) fumarolic gases with...natrocarbonatite lavas of the Oldoinyo Lengai volcano, East African Rift, Tanzania, consist of the water-soluble phenocryst...was the dominant phase at the summit area of the volcano (Dawson et al., 1995a, and references therein)...gas emission from the northern active crater and volcano flanks (fumaroles and lava emissions). Some water |  | | Journal (article/letter/editorial) | | similar to that known at Oldoinyo Lengai volcano in Tanzania. It is suggested that this earbonatite magma...recent eruptions at Oldoinyo Lengai in northern Tanzania, is rather different with N a > Ca > K > Mg >...interbedded with Miocene sediments under the large volcano of Tinderet in central Kenya (Le Bas and Dixon...extrusive carbonatites are known from Kerimasi volcano in northern Tanzania (Dawson, 1964) and vesicular carbonatitic...from the active volcano of Oldoinyo Lengai in northern Tanzania, only 10km from Kerimasi, are chemically |  | Mikhailova, Julia A., Kalashnikov, Andrey O., Sokharev, Victor A., Pakhomovsky, Yakov A., Konopleva, Nataly G., Yakovenchuk, Victor N., Bazai, Ayya V., Goryainov, Pavel M., Ivanyuk, Gregory Yu. (2016) 3D mineralogical mapping of the Kovdor phoscorite–carbonatite complex (Russia) Mineralium Deposita, 51 (1) 131-149 doi:10.1007/s00126-015-0594-z | Journal (article/letter/editorial) | | part of the Fennoscandinavian shield; Murmansk Region, Russia). We describe major intrusive and metasomatic...Sciences, 14 Fersman Street, Apatity, Murmansk Region 184209, Russia 2 Geological Institute of the...Murmansk Region 184209, Russia 3 JSC BKovdorskiy GOK^, 5 Sukhachova Street, Kovdor, Murmansk Region 184141...phlogopitite, fenite, etc.) in the southwestern Murmansk Region is an oval caldera-like depression (7.5× 9 km)...The Kovdor massif is a central-type, multiphase volcano– plutonic complex that intruded/erupted through |  | | Journal (article/letter/editorial) | | carbonate lavas of Oldoinyo Lengai, in northern Tanzania, have been of considerable interest to petrologists...alabandite (66%) intermixed with pyrite (30%); minor pyrrhotite (4%) may be dissolved in alabandite. A Mn-rich...have been published. The localities are Kerimasi volcano, Tanzania (Hay 1983), Tinderet, Kenya (Deans and...alkalic rocks: the active carbonatite volcano Oldoinyo Lengai, Tanzania. Geol Soc Am Bull 84:1019-1030 Cashman...24:349-387 Dawson JB (1966) Oldoinyo Lengai - an active volcano with sodium carbonate lava flows. In: Turtle OF |  | | 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 |  | Kamenetsky, Vadim S., Kamenetsky, Maya B., Sharygin, Victor V., Faure, Kevin, Golovin, Alexander V. (2007) Chloride and carbonate immiscible liquids at the closure of the kimberlite magma evolution (Udachnaya-East kimberlite, Siberia) Chemical Geology, 237 (3) 384-400 doi:10.1016/j.chemgeo.2006.07.010 | Journal (article/letter/editorial) | | samples from the Udachnaya-East pipe (Daldyn–Alakit region, Siberia). The groundmass of these kimberlites...natrocarbonatite lavas from the Oldoinyo Lengai volcano and their altered counterparts (Dawson, 1962; Gittins...kimberlite pipe is located in the Daldyn–Alakit region of the Siberian 386 V.S. Kamenetsky et al. /...kimberlite. A remarkable characteristic of this region is that it contains more pipes with fresh, unaltered...unaltered olivine than any other kimberlite region within the Siberian province. About 10% of the intrusions |  | Sharygin, Victor V., Kamenetsky, Vadim S., Zaitsev, Anatoly N., Kamenetsky, Maya B. (2012) Silicate–natrocarbonatite liquid immiscibility in 1917 eruption combeite–wollastonite nephelinite, Oldoinyo Lengai Volcano, Tanzania: Melt inclusion study. Lithos, 152. 23-39 doi:10.1016/j.lithos.2012.01.021 | Journal (article/letter/editorial) | | combeite–wollastonite nephelinite, Oldoinyo Lengai Volcano, Tanzania: Melt inclusion study Victor V. Sharygin a...Introduction Oldoinyo Lengai is the only active volcano on the Earth erupting natrocarbonatite lava. This...southern crater that formed the major bulk of the volcano (Lengai I), whereas nephelinites of Lengai II characterize... Nasira, Dorobo) located on the slopes of the volcano are closely related to the Lengai II activity (Keller...approximately 50%. Delhayelite, perovskite, magnetite, pyrrhotite, sodalite, K-feldspar, Sr-bearing baryte, unidentified |  | Doroshkevich, Anna G., Veksler, Ilya V., Klemd, Reiner, Khromova, Elena A., Izbrodin, Ivan A. (2017) Trace-element composition of minerals and rocks in the Belaya Zima carbonatite complex (Russia): Implications for the mechanisms of magma evolution and carbonatite formation. Lithos, 284. 91-108 doi:10.1016/j.lithos.2017.04.003 | Journal (article/letter/editorial) | | valleys of the river Zima in the Tulun district of the Irkutsk region in southern Siberia. The Belaya Zima...exsolution textures and is sometimes rimmed by pyrrhotite and dolomite (Fig 2g). The micas mostly are ...and Ca-REE fluorcarbonates are minor minerals. Pyrrhotite, fluorapatite, minerals of the burbankite group...complex carbonatite deposits of the Ziminski ore district (Eastern Sayan, Russia). Geology of Ore Deposits...natrocarbonatite magma at Oldoinyo Lengai volcano, Tanzania. Mineralogical Magazine 62(6), 759-768. doi:10 |  | Potter, N. J., Kamenetsky, V. S., Chakhmouradian, A. R., Kamenetsky, M. B., Goemann, K., Rodemann, T. (2020) Polymineralic inclusions in oxide minerals of the Afrikanda alkaline-ultramafic complex: Implications for the evolution of perovskite mineralisation. Contributions to Mineralogy and Petrology, 175 (3) doi:10.1007/s00410-020-1654-7 | Journal (article/letter/editorial) | | KMg3(AlSi3O10)(OH,F)2 Sulphides Chalcopyrite CuFeS2 Pyrrhotite Fe1-xS Rasvumite KFe2S3 Phosphates Hydroxylapatite...complex of alkaline Rocks at Iron Hill, Powderhorn district, Gunnison county, Colorado. In: Callender JF (ed)...nephelinite-natrocarbonatite relationships at Oldoinyo Lengai, Tanzania. J Petrol 39:2077–2094 Dawson JB, Hawthorn JB...hosted in co-precipitated minerals from Kerimasi volcano (Tanzania): evolution of carbonated nephelinitic |  | Braunger, S, Marks, M A W, Walter, B F, Neubauer, R, Reich, R, Wenzel, T, Parsapoor, A, Markl, G (2018) The Petrology of the Kaiserstuhl Volcanic Complex, SW Germany: The Importance of Metasomatized and Oxidized Lithospheric Mantle for Carbonatite Generation. Journal of Petrology, 59 (9) 1731-1762 doi:10.1093/petrology/egy078 | Journal (article/letter/editorial) | | 2005; Brooker & Kjarsgaard, 2011). The source region for most carbonatites and associated alkaline rocks...1990; 1991). The original size of the Kaiserstuhl volcano during its active period is difficult to reconstruct...(Fig. 3c). Occasionally, magnetite, pyrite and pyrrhotite can be observed. Titanite and apatite are ubiquitous...reconstruct the petrological evolution of this composite volcano. Depth of emplacement The only means to estimate...Oldoinyo Lengai (e.g., Zaitsev et al., 2012) or Kerimasi (e.g., Guzmics et al., 2012). Downloaded from |  | | Journal (article/letter/editorial) | | Cotta, Germany were investigated. The Spitzberg volcano on the northern shoulder of the Eger (Ohře) Graben...eruption. The authors argue that the Mantle source region may have been metasomatically enriched. It thus...investigate diverse xenoliths from a basanite volcano by combining micro-structural and micro-chemical...existence of chemically enriched Mantle domains in this region as a result of Variscan subduction has repeatedly...subduction in the region (Abdelfadil et al. 2013). The Spitzberg is a solitary volcano with a diameter |  | Woodland, A.B., Girnis, A.V., Bulatov, V.K., Brey, G.P., Höfer, H.E. (2019) Experimental study of sulfur solubility in silicate–carbonate melts at 5–10.5 GPa. Chemical Geology, 505. 12-22 doi:10.1016/j.chemgeo.2018.12.008 | Journal (article/letter/editorial) | | magma) at 6.5 GPa, 1200–1600 °C, graphite-bearing, pyrrhotite in most experiments (Shatskiy et al., 2017);...which carbonatitic melts coexisted usually with pyrrhotite. The S content of the melts ranged between 0...hosted in co-precipitated minerals from Kerimasi volcano (Tanzania): Evolution of carbonated nephelinitic...Res. Lett. 23, 2717–2720. Sharp, W.E., 1966. Pyrrhotite: a common inclusion in South African diamonds |
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