 | | Report (chapter) | | have resulted from later regional mapping by the Tanzania Geological Survey, together with radiometric dating...Extrusive basaltic centres. The term âperalkaline volcanoâ is used here to indicate that the structure is...(unpublished) state that the oldest lavas from this volcano are melanephelinites and melilitites of the Bast...Bast Hills and Birera, to the west of the main volcano.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) |  | Campeny, Marc, Kamenetsky, Vadim S., Melgarejo, Joan C., Mangas, JosĂ©, Manuel, JosĂ©, 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 |  | Zaitsev, A. N., Chakhmouradian, A. R., Siidra, O. I., Spratt, J., Williams, C. T., Stanley, C. J., Petrov, S. V., Britvin, S. N., Polyakova, E. A. (2011) Fluorine-, yttrium- and lanthanide-rich cerianite-(Ce) from carbonatitic rocks of the Kerimasi volcano and surrounding explosion craters, Gregory Rift, northern Tanzania. Mineralogical Magazine, 75 (6) 2813-2822 doi:10.1180/minmag.2011.075.6.2813 | Journal (article/letter/editorial) | | rocks of the Kerimasi volcano and surrounding explosion craters, Gregory Rift, northern Tanzania A. N. ZAITSEV1...altered calcite carbonatite lava from the Kerimasi volcano, and as euhedral crystals up to 200 mm across...explosion craters in the Gregory Rift, northern Tanzania. X-ray powder diffraction data (a = 5.434(5) AÌ)...X-ray diffraction, crystal structure, Kerimasi, Kisete, Loluni, Tanzania. Introduction CERIANITE-(CE), ideally...cerianite-(Ce) in carbonatitic rocks in northern Tanzania, and report the physical properties and the crystal-chemical |  | Zaitsev, A. N., Williams, C. T., Britvin, S. N., Kuznetsova, I. V., Spratt, J., Petrov, S. V., Keller, J. (2010) Kerimasite, Ca3Zr2(Fe23+Si)O12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineralogical Magazine, 74 (5) 803-820 doi:10.1180/minmag.2010.074.5.803 | Journal (article/letter/editorial) | | carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania A. N. ZAITSEV1,2...extinct nephelinitic volcano Kerimasi and surrounding explosion craters in northern Tanzania. The mineral occurs...The name is given after the locality, Kerimasi volcano, Tanzania. K EY WORDS : kerimasite, kimzeyite...composition, crystal structure, Kerimasi, Loluni, Kisete, Loolmurwak, Tanzania. * E-mail: burbankite@gmail...et al., 1994), Oldoinyo Lengai, Gregory rift, Tanzania (Dawson et al., 1995; Dawson and Hill, 1998), |  | | Journal (article/letter/editorial) | | East African rift system in Kenya, Uganda, and Tanzania. Although some of these were studied by earlier...and pyroclastics of the Djombo, OldoinyoL'Engai, Kerimasi, Hanang, Kwaraha, Lashaine, Toror, and Kazekere...area; the Kavirondo ridge; and the Natron-Engaruka region. The rock samples studied were collected by V....Oldoinyo-L'Engai and Nyamlagira Fort Portal and Bunyaguru Kerimasi Kwaraha, Meru, and Hanang Elgon and Kadam Bukusu... The eroded cinder cone of the gigantic Elgon Volcano is as much as 85 km in diameter and 3.5 km in height |  | KĂĄldos, RĂ©ka, Guzmics, Tibor, Mitchell, Roger H., Dawson, John Barry, Milke, Ralf, SzabĂł, 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...SzaboÌ, 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) | | 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 |  | 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...addition to the magmatic evolutionary trend, the Kerimasi magnetite exhibits a previously unrecognized trend...evolutionary trend, trace elements, LAâICPâMS, Kerimasi, ÂTanzania. Sommaire Nous avons examinĂ© la distribution...types de calciocarbonatite provenant du volcan Kerimasi, en Tanzanie. Dans tous les Ă©chantillons, la magnĂ©tite |  | | Journal (article/letter/editorial) | | ancylite). Pyrochlore often associates with baddeleyite. We should note that ancylite, a REE carbonate...and magnetite from carbonatite of the Kerimasi Volcano, Tanzania (900â1000°C) [6]. After cooling, inclusions...and magnetite from carbonatite of the Kerimasi Volcano, Tanzania [6]. 440 ANDREEVA The high concentration |  | Uher, Pavel, MilovskĂĄ, Stanislava, MilovskĂœ, Rastislav, KodÄra, Peter, BaÄĂk, Peter, BilohuĆĄÄin, VladimĂr (2015) Kerimasite, {Ca3}[Zr2](SiFe3+2)O12 garnet from the VysokĂĄ-Zlatno skarn, Ć tiavnica 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...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...1998). The absence of internal vibrations in the region between ~3300 and 3700 cm 1 show negligible (if |  | | Journal (article/letter/editorial) | | Cax)2âx(CO3)], known from Ol Doinyo Lengai volcano (Tanzania). A reïŹnement to the IUGS chemical classiïŹcation...natrocarbonatitic lavas from Ol Doinyo Lengai, Tanzania that contain 38â40 wt.% combined Na2O and K2O...(Deans and Roberts 1984; Zaitsev et al. 2013); Kerimasi, Tanzania (Hay 1983; Zaitsev 2010; Guzmics et al. 2011);...recent (e.g. Ol Doinyo Lengai, Tanzania, which is considered an active volcano). Frequency plots of carbonatites...carbonatite provinces: (a) East Africa (Kenya, Uganda, Tanzania, and one occurrence in Zambia); (b) Namibia and |  | | Journal (article/letter/editorial) | | 550â600 cmâ1 region and phosphate antisymmetric stretching modes in the 900â1200 cmâ1 region. Also obvious...The afmite spectrum has multiple bands in the OH region, both sharp and broad. The sharp bands more likely...bonding with isolated H2O groups in the interlayer region. Afmite is closely related structurally to the...carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineral. Mag.,...Kerimasite is a new Zr garnet from the Kerimasi nephelinite/ carbonatite volcano and Loluni, Kisete, and Loolmurwak |  | 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 phoscoriteâcarbonatite complex (Russia) Mineralium Deposita, 51 (1) 131-149 doi:10.1007/s00126-015-0594-z | Journal (article/letter/editorial) | | Berlin Heidelberg 2015 Abstract The Kovdor baddeleyiteâapatiteâmagnetite deposit in the Kovdor phoscoriteâcarbonatite...part of the Fennoscandinavian shield; Murmansk Region, Russia). We describe major intrusive and metasomatic...interest, i.e. magnetite, hydroxylapatite, and baddeleyite. The content of Sr, rare earth elements (REEs)...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 |  | | 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)...(diopside or aegirine), magnetite, and accessory baddeleyite, pyrochlore, or dysanalyte. The country rocks |  | | 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 |  | | Report (chapter) | | -/:/ ", KENYA u __-/~.'\- " :. / I 2 ~ i TANZANIA 9 ~ ' "q'/~'L I I I 3;"~I "". IIi1 A "...KILIMANJARO SADIMAN 9 100 L 1 i ! I ESSIMINGOR 4o TANZANIA 134~ ~ HANANG ~ 1380 FIG. 3. Map of Kenya...(non-carbonatitic) volcanic centres corresponding to the Kenyan region of the outer zone shown in Fig. 2. Between these...than 100 ppm. The Miocene lavas of the Kisingiri volcano in W Kenya provide a good example of the normal...rift valley, particularly those in the Kishalduga region, are almost identical (cf. Figs 6(a) and 6(b), |  | | Journal (article/letter/editorial) | | REE)2(PO4)6]. Other minerals such as zircon and baddeleyite similarly exhibit a strong preference for Ce4+...the pre-edge region of the XAS spectra (5764â5944 eV), 0.25 eV steps in the XANES region (5944â6014 eV)...eV), and in the EXAFS region spectra were collected in steps of 0.2 k to a maximum of 8 k (6209 eV). The...(silicate glass). A hump-like feature in the Pr4+ region is clearly observed in the stetindite-(Ce) spectrum.../ Fluorapatite 30 2 3 4 5 6 7 stetindite Kerimasi cerianite Ke ri ma si ap ati te b Sushina |  | Feng, Meng, Song, Wenlei, Kynicky, Jindrich, Smith, Martin, Cox, Clinten, Kotlanova, Michaela, Brtnicky, Martin, Fu, Wei, Wei, Chunwan (2020) Primary rare earth element enrichment in carbonatites: Evidence from melt inclusions in Ulgii Khiid carbonatite, Mongolia. Ore Geology Reviews, 117. 103294 doi:10.1016/j.oregeorev.2019.103294 | Journal (article/letter/editorial) | | province is well known for many alkaline-carbonatite volcano-plutonic complexes and associated REE and rare...The complex intrudes into a Lower Carboniferous volcano-sedimentary sequence composed of andesites and...from the carbonate melt inclusions in Kerimasi volcano,Tanzania (Guzmics et al., 2012). Other elements...been found in primary carbonate melts from Kerimasi, Tanzania (Guzmics et al., 2012). Notably, a remarkable...HFSE concentrations (occurrence of pyrochlore, baddeleyite, etc.) than immiscible products. However, these |  | 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...Accessory calcite, ancylite-(Ce), rutile and baddeleyite have been also found. A characteristic feature...amphibole and calcite are minor minerals, whereas baddeleyite, zircon, rutile and ancylite-(Ce) occur in accessory...or chlorite along the rims. SC R Accessory baddeleyite is rimmed by thin bands of zircon (Fig. 3b)....burbankite group, hilairite, fergusonite-(Ce), baddeleyite, monazite-(Ce), ilmenite, celestine, barite, |  | Chakhmouradian, Anton R., Reguir, Ekaterina P., Zaitsev, Anatoly N., CouĂ«slan, Christopher, Xu, Cheng, KynickĂœ, JindĆich, Mumin, A. Hamid, Yang, Panseok (2017) Apatite in carbonatitic rocks: Compositional variation, zoning, element partitioning and petrogenetic significance. Lithos, 274. 188-213 doi:10.1016/j.lithos.2016.12.037 | Journal (article/letter/editorial) | | melt inclusions in perovskite from the Kerimasi volcano (Tanzania) also show lower P2O5 values (Guzmics...globules documented at the Kerimasi and Oldoinyo Lengai carbonatite volcanoes (Tanzania), which were interpreted...(tetra-ferri)phlogopite, AC CE P forsterite, baddeleyite and pyrochlore, and variably referred to as phoscorite... Nb and Zr minerals (pyrochlore, columbite, baddeleyite or zircon; RI Figs. 3a-f); (ii) the common...calcite carbonatites of Eden Lake (Canada), SC Kerimasi and Fuerteventura: 7.3, 8.1 and 8.8 wt.% LREE2O3 |  | Chebotarev, Dmitry A., Veksler, Ilya V., Wohlgemuth-Ueberwasser, Cora, Doroshkevich, Anna G., Koch-MĂŒller, Monika (2019) Experimental study of trace element distribution between calcite, fluorite and carbonatitic melt in the system CaCO3â+âCaF2â+âNa2CO3â±âCa3(PO4)2 at 100 MPa. Contributions to Mineralogy and Petrology, 174 (1) doi:10.1007/s00410-018-1530-x | Journal (article/letter/editorial) | | experiments, is low and limited by crystallization of baddeleyite and Nb-bearing perovskite. Keywords Carbonatites...minerals such as rutile, apatite, perovskite, and baddeleyite at PâT conditions of the upper mantle (Prowatke...L melt, V vapor, Cc calcite, Fl fluorite, Bd baddeleyite, Pv perovskite Thermo iCAP TQ mass spectrometer...clusters of small (few micrometers) Hf-bearing baddeleyite crystals and perovskiteâlueshite solid solution...melt, accordingly, Cc calcite, Fl fluorite, Bd baddeleyite, Pv perovskite runs where calcite and fluorite |  | Keyser, , Ciobanu, , Cook, , Feltus, , Johnson, , Slattery, , Wade, , Ehrig, (2019) Mineralogy of Zirconium in Iron-Oxides: A Micron- to Nanoscale Study of Hematite Ore from Peculiar Knob, South Australia. Minerals, 9 (4) 244 doi:10.3390/min9040244 | Journal (article/letter/editorial) | | and fields of sub-micron-wide inclusions of baddeleyite as conjugate needles with orientation at ~110âŠ...directly attributable to nm-scale inclusions of baddeleyite pervasively distributed throughout the hematite...by focused ion beam methods, we identify [011]baddeleyite epitaxially intergrown with [22.1]hematite ....ore-forming processes. Keywords: hematite; Zr; baddeleyite; zircon; trace elements; HAADF-STEM; Peculiar...magnetite in calciocarbonatite from the Kerimasi volcano, Tanzania, showing that magnetite is a minor host |  | Amores-Casals, , Melgarejo, , Bambi, , Gonçalves, , Morais, , Manuel, , Neto, , Costanzo, , Molist, (2019) Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in CarbonatitesâThe Bonga Complex (Angola) Minerals, 9 (10) 601 doi:10.3390/min9100601 | Journal (article/letter/editorial) | | Standards and lines used for zircon, zirconolite and baddeleyite are the same as for pyrochlore but adding ZrSiO4...may also form in drusy cavities or replaces baddeleyite along with quartz, thus indicating a very late...synchysite-(Ce) (Syn) and zircon (Zrn) replacing replacing baddeleyite (Bdd); (f) BG-7a. Fine aggregate of acicular...acicular synchysite among ankerite, quartz baddeleyite (Bdd); (f) BG-7a. Fine aggregate of acicular synchysite...zirconolite zirconolite (Zrc) and finally by baddeleyite (Bdy); (c) BG-6j. Aillikite spheroid. Inner rim |  | Su, Jian-Hui, Zhao, Xin-Fu, Li, Xiao-Chun, Hu, Wei, Chen, Mi, Xiong, Yi-Lin (2019) Geological and geochemical characteristics of the Miaoya syenite-carbonatite complex, Central China: Implications for the origin of REE-Nb-enriched carbonatite. Ore Geology Reviews, 113. 103101 doi:10.1016/j.oregeorev.2019.103101 | Journal (article/letter/editorial) | | No.4 Geology Team of Guangxi Zhuang Autonomic Region, Nanling, 530033, China 4 Geological Survey of...SiO2-free and low silica carbonate melts crystallize baddeleyite not zircon, which can only crystallize from melts...a metasomatic event during the Triassic in this region (Ying et al., 2017; Zhang et al., 2019). Isotopes...confirmed in contemporary Shaxiongdong complex in this region (Chen et al., 2018). Although there is evidence...contemporaneous alkali magmatic rocks in the southern Qinling region, including ultramafic to mafic dyke swarms, lamprophyre |  | | Journal (article/letter/editorial) | | that carbonatitic melts can only crystallize baddeleyite rather than zircon [40], and zircon in carbonatitic...and can easily be dissolved and replaced by baddeleyite or diverse calcium zirconates [40,41]. Our recent...and carbonatite assimilation at Oldoinyo Lengai, Tanzania. Contrib. Mineral. Petr. 2009, 158, 589â598. [CrossRef]...hosted in co-precipitated minerals from Kerimasi volcano (Tanzania): Evolution of carbonated nephelinitic...Experimental constraints on the stability of baddeleyite and zircon in carbonate- and silicate-carbonate |
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