| Pekov, I. V., Zubkova, N. V., Chukanov, N. V., Sharygin, V. V., Pushcharovsky, D. Yu. (2009) Crystal chemistry of delhayelite and hydrodelhayelite. Doklady Earth Sciences, 428 (1) 1216-1221 doi:10.1134/s1028334x09070393 | Journal (article/letter/editorial) | samples from alkaline lavas of the Ol Doinyo Len gai volcano in Tanzania is the content of Si increased...we made, like in the delhayelite from the Ol Doinyo Lengai vol cano, is close to four atoms per formula...associated with orthoclase, nepheline, sodalite, aegirine, lamprophyllite, lomo nosovite, fenaksite, villiaumite...10—Khibiny massif, Kola Peninsula; 8, 9—Ol Doinyo Lengai, Tanzania; 11—Bultfontein, South Africa. References: | | | Journal (article/letter/editorial) | Studies on the Igneous rock complex of the Oslo region. 20. Petrology and geochemistry of ekerite. Det...T. & BARNES, C. G. (2007): A new occurrence of aegirine in Norway. Norwegian Journal of Geology, 87, 451-456...RAADE, G. (2009): Chemical composi on of acmite/aegirine intergrowths from Rundemyr. Norsk Bergverksmuseum...vulkan i Den østafrikanske riftdal – Ol Doinyo Lengai i Tanzania – et stort utbrudd, og her kunne forskerne...verdens eneste aktive karbonatittvulkan, Ol Doinyo Lengai i Tanzania. Utbrudd august 2002. Foto: Per Bjørn | | | Journal (article/letter/editorial) | [(Na,K,Cax)2–x(CO3)], known from Ol Doinyo Lengai volcano (Tanzania). A refinement to the IUGS chemical...(<600°C) natrocarbonatitic lavas from Ol Doinyo Lengai, Tanzania that contain 38–40 wt.% combined Na2O...Roberts 1984; Zaitsev et al. 2013); Kerimasi, Tanzania (Hay 1983; Zaitsev 2010; Guzmics et al. 2011);... PARADIS 2010) to very recent (e.g. Ol Doinyo Lengai, Tanzania, which is considered an active volcano)... Carbonatites with mineralogy similar to Ol Doinyo Lengai natrocarbonatite may have been relatively | | | Journal (article/letter/editorial) | [NaCa2Si3O8(OH)]–sodalite [Na8(Al6Si6O24) Cl2]–aegirine vein in feldspathic urtite at Mount Koashva, Khibina...was found in intergrowths with villiomite (NaF), aegirine, natrolite Rasvumite, KFe2S3, was first found...minerals—microcline ( KAlSi 3O 8), pyroxene (aegirine, N aFeSi 2O 6) and nepheline (Na3KAl4Si4O16)...sulfides from natrocarbonatite lavas of Ol Doinyo Lengai, Tanzania (Mitchell 1997). X-ray studies could...found in the carbonate lavas of the Ol Doinyo Lengai volcano, Tanzania (Mitchell 1997), which compositions | | Nabyl, Zineb, Massuyeau, Malcolm, Gaillard, Fabrice, Tuduri, Johann, Iacono-Marziano, Giada, Rogerie, Grégory, Le Trong, Emmanuel, Di Carlo, Ida, Melleton, Jérémie, Bailly, Laurent (2020) A window in the course of alkaline magma differentiation conducive to immiscible REE-rich carbonatites. Geochimica et Cosmochimica Acta, 282. 297-323 doi:10.1016/j.gca.2020.04.008 | Journal (article/letter/editorial) | African Rift, including data from the Ol Doinyo Lengai volcano in Tanzania (De Moor et al., 2013), the most...Alkaline silicate rocks from the famous Ol Doinyo Lengai in Tanzania (grey arrow in Fig. 8a; data from De...0.70 to 1.0 ). The magmatic rocks from the Ol Doinyo Lengai volcano evolving toward strongly peralkaline...composition of natural natrocarbonatite from the Ol Doinyo Lengai volcano, which, at some magmatic stage, must...Volatile-rich silicate melts from Oldoinyo Lengai volcano (Tanzania): implications for carbonatite genesis | | | Journal (article/letter/editorial) | com/locate/lithos Peralkaline silicate lavas at Oldoinyo Lengai, Tanzania Jurgis Klaudius ⁎, Jörg Keller Institut für...June 2006 Abstract A detailed study of Oldoinyo Lengai has led to the recognition of two major cone-building...phonolitic stage, Lengai I, forms the southern cone. The recent nephelinitic Lengai II developed following...a major sector collapse event over Lengai I. Petrography of Lengai II lavas show that nephelinite is combeite-...combeite- and wollastonite-bearing. All Oldoinyo Lengai lavas are peralkaline and highly evolved in terms | | Filina, Maria I., Aksenov, Sergey M., Sorokhtina, Natalia V., Chukanov, Nikita V., Kononkova, Natalia N., Belakovskiy, Dmitriy I., Britvin, Sergey N., Kogarko, Lia N., Chervonnyi, Alexandr D., Rastsvetaeva, Ramiza K. (2019) The new mineral fluorbarytolamprophyllite, (Ba,Sr,K)2[(Na,Fe2+)3TiF2][Ti2(Si2O7)2O2] and chemical evolution of lamprophyllite-group minerals in agpaitic syenites of the Kola Peninsula. Mineralogy and Petrology, 113 (4) 533-553 doi:10.1007/s00710-019-00664-0 | Journal (article/letter/editorial) | components of the rocks are potassium feldspar, Ti-rich aegirine-augite, aenigmatite, alkaline amphiboles, astrophyllite...Russian Academy of Sciences, Chernogolovka, Moscow region 142432, Russia 5 Fersman Mineralogical Museum...Oldoinyo Lengai volcano, Tanzania (Dawson 1998), alkaline basalts of the Eifel paleovolcanic region, Germany...and tectonophysical studies of the Kola-Karelian region, the Paleozoic carbonatite and alkaline massifs...are potassium feldspar (25–30 vol.%), Ti-rich aegirine-augite (10–15 vol.%), aenigmatite (10–15 vol.%) | | | Report (issue) | Oldonyo Lengai (Oldoinyo Lengai) Volcano and Surroundings, Arusha Region, United Republic of Tanzania By David...Oldonyo Lengai (Oldoinyo Lengai) and surroundings, Arusha Region, United Republic of Tanzania: U.S. Geological... . . . . . . . . . . . . 17 Oldonyo Lengai . . . . . . . . . . . . . . . ..... . . . . . . . . . 32 Age of Oldonyo Lengai . . . . . . . . . . . . . . . .... . . 32 Previously Published Ages from Oldonyo Lengai . . . . . . . . . . . . . . . | | | Journal (article/letter/editorial) | forsterite–phlogopite ijolites at Oldoinyo Lengai Volcano, Tanzania: study of melt inclusions V.S. Sekisova...inclusions in minerals of ijolite xenoliths at Oldoinyo Lengai Volcano. Melt inclusions with different phase compositions...ijolite; nyerereite; natrocarbonatite; Oldoinyo Lengai Introduction The East African Rift System, expanding...the Gulf of Aden through Ethiopia, Kenya, and Tanzania, is divided into two large tectonic zones: Western...the present, for example, Oldoinyo Lengai, which is located in Tanzania, ~16 km south of Lake Natron, near | | Jung, Seung Gi, Choi, Sung Hi, Ji, Kang Hyeun, Ryu, Jong-Sik, Lee, Der-Chuen (2019) Geochemistry of volcanic rocks from Oldoinyo Lengai, Tanzania: Implications for mantle source lithology. Lithos, 350. 105223 doi:10.1016/j.lithos.2019.105223 | Journal (article/letter/editorial) | Geochemistry of volcanic rocks from Oldoinyo Lengai, Tanzania: Implications for mantle source lithology...Geochemistry of volcanic rocks from Oldoinyo Lengai, Tanzania: Implications for mantle source lithology...Geochemistry of volcanic rocks from Oldoinyo Lengai, Tanzania: 2 Implications for mantle source lithology...(S.H. Choi) 18 19 20 Abstract 21 22 Oldoinyo Lengai is the only active carbonatite volcano within the...the East African Rift Valley in 23 northern Tanzania. The volcano is dominated by peralkaline silicate | | | Journal (issue) | Studies on the Igneous rock complex of the Oslo region. 20. Petrology and geochemistry of ekerite. Det...T. & BARNES, C. G. (2007): A new occurrence of aegirine in Norway. Norwegian Journal of Geology, 87, 451-456...RAADE, G. (2009): Chemical composi on of acmite/aegirine intergrowths from Rundemyr. Norsk Bergverksmuseum...vulkan i Den østafrikanske riftdal – Ol Doinyo Lengai i Tanzania – et stort utbrudd, og her kunne forskerne...verdens eneste aktive karbonatittvulkan, Ol Doinyo Lengai i Tanzania. Utbrudd august 2002. Foto: Per Bjørn | | 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)...chalcopyrite). Less common are microcline, albite, aegirine, muscovite, annite, mesolite, barytocalcite, calzirtite | | Wang, Zhen-Yu, Fan, Hong-Rui, Zhou, Lingli, Yang, Kui-Feng, She, Hai-Dong (2020) Carbonatite-Related REE Deposits: An Overview. Minerals, 10 (11) 965 doi:10.3390/min10110965 | Journal (article/letter/editorial) | (Russia), and natrocarbonatite in the Ol Doinyo Lengai volcano (Tanzania) mainly consisting of Na-K-Ca carbonates...fluorite, quartz, barite, calcite, apatite and aegirine-augite. The hydrothermal fluids exsolved from...fenite include Na- and K-amphiboles, Na-pyroxene, aegirine-augite, K-feldspar, albite, perthite, nepheline...calcite/dolomite carbonatite. fenite mainly consists Region [61,62]. The ore-forming is extremely complex,...carbonatite, such as Oldoinyo Lengai sodic carbonatite in northern Tanzania [19,57,58]. However, carbonatites | | | Journal (article/letter/editorial) | 8] without generalizations and correlations. A region of widespread development of UIC plutons, uniquely...formation, is the western Anabar region (the Maymecha-Kotuy province). This region is on the northern margin...1. Geological sketch map of the western Anabar region: 1) Quaternary system; 2) Cretaceous system; 3)...Paleozoic sequence, widespread in the west of the region, are more than 1000 m thick. This sequence consists...sedimentary-volcanic cover of the western Anabar region: I) sedimentary sequence; II) volcanic sequence | | Neave, David A., Black, Martin, Riley, Teal R., Gibson, Sally A., Ferrier, Graham, Wall, Frances, Broom-Fendley, Sam (2016) On the Feasibility of Imaging Carbonatite-Hosted Rare Earth Element Deposits Using Remote Sensing. Economic Geology, 111 (3) 641-665 doi:10.2113/econgeo.111.3.641 | Journal (article/letter/editorial) | Mountain Pass in the United States, Panda Hill in Tanzania, and Sokli in Finland were sourced from the Harker...Mineral labels are as follows: Ab = albite, Aeg = aegirine, Alk Amph = alkali amphibole, Ap = apatite, Bast...al. (2009). Although the Panda Hill complex of Tanzania is a largely calciocarbonatitic in nature, magnesiocarbonatite...synchysite 2 BM 1 Collection Y Y Y Ank, Mag Tanzania Ap, Pyr Y Y Y Y Cal, Phl, Mag Cal, Bi, Mag... Mag Cal, Bi, Mag Uganda Uganda Malawi Malawi Tanzania Ap Y Y Ap,Pyr Ap Y Mz Y Pyr Y Y (published) | | Fontijn, Karen, Elburg, Marlina A., Nikogosian, Igor K., van Bergen, Manfred J., Ernst, Gerald G.J. (2013) Petrology and geochemistry of Late Holocene felsic magmas from Rungwe volcano (Tanzania), with implications for trachytic Rungwe Pumice eruption dynamics. Lithos, 177. 34-53 doi:10.1016/j.lithos.2013.05.012 | Journal (article/letter/editorial) | Late Holocene felsic magmas from Rungwe volcano (Tanzania), with implications for trachytic Rungwe Pumice...Available online 5 June 2013 Keywords: Rungwe Tanzania Alkaline magmas Trachyte Magmatic differentiation...eruptions a b s t r a c t Rungwe in southern Tanzania is an active volcanic centre in the East African...Democratic Republic of the Congo; carbonatitic Ol Doinyo Lengai, Tanzania; trachytic Longonot, Kenya) and calderas...Province is the southernmost volcanically active region in the EARS, and comprises three main central volcanoes: | | | Report (issue) | were that part of the Rift Valley not a volcanic region, it is unlikely that the deposits would have accumulated...(a) Olorgesailie Volcanic Series (b) Shanamu (2) Ol Keju Nero Basalts (3) Kirikiti Basalts (4) Lengitoto...sediment (5) The Plateau Trachyte Series (6) Ol Doinyo Nyegi Volcanics (7) Ash and scoriaceous lava vents...through Ol Doinyo Nyegi hill Fig. 5.- -Section in a stream one mile south-west of Ol Doinyo Nyegi Fig...area was formerly in the Masai Extra-Provincial District but is now in Southern Province, that part east | | | Journal (article/letter/editorial) | JamesR.) Vanadinite.San Carlos (Levitt, S. R., et ol.) 9-10 1s62 Mineral data B-quartz solid solution...Structure l-2 3O2 (Mitchell, JudsonT., et a/.) Aegirine Wyoming,YellowstoneNational Park, Geyserbasin...lead ions, empty halide sites (Merker, Ludwig, et ol.) 7-8 1435 Germany, Ems, vibrationalspectra (Levitt...California,Inyo county, Death Valley (Erd, Richard C , et ol.\ 3-4 349 Welinite New data ( F l e i s c h e r ...SUBJECTINDEX TO VOLUME 55 Tanzania Mineralogy Nepheline, Ol Doinyo Lengai, volcanic rocks 9-10 1670 (Brown | | Zelenski, Michael E., Fischer, Tobias P., de Moor, J. Maarten, Marty, Bernard, Zimmermann, Laurent, Ayalew, Dereje, Nekrasov, Aleksey N., Karandashev, Vasilii K. (2013) Trace elements in the gas emissions from the Erta Ale volcano, Afar, Ethiopia. Chemical Geology, 357. 95-116 doi:10.1016/j.chemgeo.2013.08.022 | Journal (article/letter/editorial) | Academy of Sciences, Chernogolovka 142432, Moscow Region, Russia Department of Earth and Planetary Sciences...Academy of Sciences, Chernogolovka 142432, Moscow Region, Russia b c a r t i c l e i n f o Article history:...Akademika Osip'yana st. 4, Chernogolovka, Moscow Region, Russia. Tel.: +7 4965225854; fax: +7 4965244425...accessible high-temperature fumaroles. Ol Doinyo Lengai, Tanzania, is located on the East African rift;...the tectonics (Acocella, 2006) and geology of the region (Barberi and Varet, 1970), reconstruction of morphological | | | Book | differentiation 51 rocks Differentiation in wholly ol The diversity of magmatic liquid magmas Fractional...rocks 121 124 126 129 129 Contents Chapter 7 (ol Nad) General statement Textures and modal TS Geochemistry... Guttard studied the rocks of the Auvergne region of central France and recognized many recently...work (1894-1933) on the igneous rocks of the Oslo region of Norway; (b) the publication in 1895 of Alfred...uniquely able to provide substantial data about the region where they originated. The term primary magma should | | | Book | coccoliths. From plankton sample of the Kimberley region, Australia, kindly provided by CSIRO Tasmania (picture...which the transport medium can move from the source region to the locus of ore precipitation; 5 an energy...crystal faces of the cube {100}. Kondjor, Chabarowsk district, Eastern Siberia, Russia hexagonal with 6/m2/m2/m...deposits of the Namib Desert and in the offshore region of Namibia. Many occurrences of diamond are known...Kokchetau Massif of Siberia, the Western Gneiss region of Norway and the Saxonian Erzgebirge in Germany | | | Book (edition) | 11 Enstatite 7.12 Pigeonite 7.13 Augite 7.14 Aegirine 7.15 Hornblende 7.16 Muscovite 7.17 Phlogopite...hidden by a nebular disc of material (diagonal dark region) similar in mass and size to the one that formed...lower side by the 660 km seismic discontinuity. The region between this depth and another prominent discontinuity...capable of moving, albeit very slowly. In this region, heat can be transferred by moving hot low-density...triple junction may be present beneath the Afar region of Ethiopia, with the Red Sea and Gulf of Aden | | | Book (volume) | volume and quality of gemstones being mined in that region. As new localities are identified and new gemstones...localities or gemstones may lose their appeal or a region may become unproductive – so the market can be...mineral zoisite), which was discovered in 1967 in Tanzania and is now available through many retail outlets...of Afghanistan, the Sverdlovsk region of the Urals, and the Altai region of north-western China. Gems formed...sapphires (Mogok), Pakistan rubies (Hunza Mountains), Tanzania rubies (Morogoro), and Vietnam rubies (Luc Yen | | | Book | Resorbed crystal of quartz (Qz) in an olivinebearing (Ol) groundmass. The anhedral crystal shape and reaction...Compositions of basalt glasses from the Narrowgate region of the FAMOUS valley, Mid-Atlantic Ridge Geochemical...alkali basalts projected onto the normative Qz-Nph-Ol triangle Schematic cross-section of a typical island...at relatively high temperatures. a = stability region for sanidine, b = stability for orthoclase, c =...7/26/2013 8:35:06 AM 1.4 Igneous Textures Plag Ol anorthosite anorthosite 90 dunite 90 90 gabbro | | | Book (edition) | within the city limits, but also to the surrounding region. In this edition of the Thesaurus, names of cities...newly added are followed by the word “region”; e.g., Stripa region. Names of materials, when used as GeoRef... isochrons isotopes SA SA Abruzzi Autonomous region on the Adriatic Sea. CO N414000N425500 E0144800E0130000...group chain silicates silicates BT minerals SA aegirine Acoela Term introduced in 1981. Includes use on...Islands Adalia use Antalya Adamawa Administrative region in N. BT Cameroon adamellite As of 1981, includes |
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