 | | Journal (article/letter/editorial) | | April 2013, Vol. 77(3), pp. 213–226 Tinderet volcano, Kenya: an altered natrocarbonatite locality?...ABSTRACT The Tinderet volcano (19.9 to 5.5 Ma), located within the Kavirondo rift in Kenya, contains blocks...accessory perovskite and ‘plumbopyrochlore’; nyerereite is present as inclusions in the perovskite. At...mineralogical and isotopic data indicate that the Tinderet carbonatites are similar to natrocarbonatites...of the Tinderet carbonatites were originally alkali-rich rocks which contained primary nyerereite. K EY |  | 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) | | presence of 13 different alkali-rich phases (e.g., nyerereite, shortite, halite and sylvite) that argues for...natrocarbonatite localities worldwide such as Tinderet or Kerimasi, leading to our ACCEPTED MANUSCRIPT...Barker and Nixon, 1989; Eby et al., 2009), Tinderet, Kenya (Deans and Roberts, 1984; Zaitsev et al., 2013)...Oldoinyo Lengai is the only active carbonatite volcano known, and ACCEPTED MANUSCRIPT where unique natrocarbonatite...other carbonatite localities such as the Kerimasi volcano (Reguir et al., SC 2008; Guzmics et al., 2015) |  | Mangler, Martin F., Marks, Michael A.W., Zaitzev, Anatoly N., Eby, G. Nelson, Markl, Gregor (2014) Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite. Chemical Geology, 365. 43-53 doi:10.1016/j.chemgeo.2013.11.027 | Journal (article/letter/editorial) | | com/locate/chemgeo Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation...abundances in natrocarbonatites from Oldoinyo Lengai volcano (Tanzania) and the associated silicate rocks in...surface alteration processes. 2. Oldoinyo Lengai Volcano Oldoinyo Lengai is located in Tanzania, approximately...1995). System (Fig. 1). Age data suggest that the volcano has existed for more than 500 000 years (Bagdasarayan...et al., 2012). In recent times it is the only volcano known to have erupted natrocarbonatitic tephra |  | | Journal (article/letter/editorial) | | volcanos are known in the East African rift system in Kenya, Uganda, and Tanzania. Although some of these were... The eroded cinder cone of the gigantic Elgon Volcano is as much as 85 km in diameter and 3.5 km in height...height. The eroded caldera of the Napak Volcano originally ex ceeded 50 km in diameter and 3.5 km in...in height [ 1 2 ] . The Kizingiri Volcano must once have had a cinder cone more than 50 km in diameter...Bukusu, and Tororo), and also the large Elgon volcano, whose volcanic structure is preserved. Quaternary |  | | Journal (article/letter/editorial) | | kimberlite liquids Nyerereite and shortite were found within the melt inclusions. D Nyerereite and shortite...come from a crustal AC source. Orthorhombic nyerereite (Na,K)2Ca(CO3)2 and shortite were identified...temperature is as high as 500 оС. Generally, MI nyerereite is considered as a magmatic mineral but experiments...about 300 оС indicating that LT orthorhombic nyerereite may crystallise directly from the melt as well...carbonatite, melt inclusion, alkaline carbonate, nyerereite, SC R IP shortite, Raman spectroscopy. 1 |  | Zaitsev, Anatoly N., Britvin, Sergey N., Kearsley, Anton, Wenzel, Thomas, Kirk, Caroline (2017) Jörgkellerite, Na3Mn3+3(PO4)2(CO3)O2·5H2O, a new layered phosphate-carbonate mineral from the Oldoinyo Lengai volcano, Gregory rift, northern Tanzania. Mineralogy and Petrology, 111 (3) 373-381 doi:10.1007/s00710-016-0487-6 | Journal (article/letter/editorial) | | phosphate-carbonate mineral from the Oldoinyo Lengai volcano, Gregory rift, northern Tanzania Anatoly N. Zaitsev...layered phosphate-carbonate from the Oldoinyo Lengai volcano in the Gregory Rift (northern Tanzania). The mineral...low-temperature oxidative alteration of gregoryite-nyerereite carbonatites. Editorial handling: L. Bindi ...LE11 3TU, UK Oldoinyo Lengai is a well-known volcano in northern Tanzania owing to eruptions of highly...and Keller 2006; Keller and Zaitsev 2012). The volcano also contains phonolites, which form the older |  | | Journal (article/letter/editorial) | | sideroplesite), and (b) sodium carbonates: eitelite, nyerereite and nahcolite. The minerals form paragenetic...between similar cation species: calcite with nyerereite (sample #8/103) and nahcolite (sample #8/103-2)...and Keller 2006). Na-carbonates, − eitelite, nyerereite and nahcolite in both associations (from the... Fe-magnesite FeMgs (Mg,Fe)(CO3) Eitelite Nyerereite Eit Nyer Na2Mg(CO3)2 (Na,K)2Ca(CO3)2 Nah Ha...association in the Deep Earth Fig. 3 Calcite and nyerereite in carbonatitic inclusion in diamond. Sample |  | 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) | | The Kovdor massif is a central-type, multiphase volcano– plutonic complex that intruded/erupted through...åkermanite, monticellite, perovskite, shortite, and nyerereite occur near the contact with foidolites or nepheline-rich...thorianite, ancylite-(Ce), strontianite, shortite, nyerereite, barite, andradite–grossular, banalcite, gonnardite...eitelite, witherite, norsethite, burbankite, nyerereite, northupite, galena, and sphalerite are present...barite, microlite, monazite-(Ce), olekminskite, nyerereite, eitelite, northupite, ulvöspinel, and sphalerite |  | | Journal (article/letter/editorial) | | consisting mainly of Na–K–Ca carbonates, such as nyerereite [(Na,K)2Ca(CO3)2] and gregoryite [(Na,K,Cax)2–x(CO3)]...Cax)2–x(CO3)], known from Ol Doinyo Lengai volcano (Tanzania). A refinement to the IUGS chemical classification...Mountain, Kenya (Clarke 4 G. J. SIMANDL AND S. PARADIS and Roberts 1986); Tinderet, Kenya (Deans and...Lengai, Tanzania, which is considered an active volcano). Frequency plots of carbonatites with well-established...preserved in the geological record. Destruction of nyerereite (the main natrocarbonatite-forming mineral) in |
|
