 | 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) | | 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...potassium feldspar (25–30 vol.%), Ti-rich aegirine-augite (10–15 vol.%), aenigmatite (10–15 vol.%), amphiboles |  | | 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 |  | | 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 . . . . . . . . . . . . . . . |  | 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 |  | 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 the...include Na- and K-amphiboles, Na-pyroxene, aegirine-augite, K-feldspar, albite, perthite, nepheline and...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 |  | | 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 |  | 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: |  | | Journal (article/letter/editorial) | | 7-8 1396 Petrology,Germany,Weiselberg, pigeonite,augite hypersthene, (Nakamura,Yasuo,et a/.) 1l-12 1999...tt-12 2063 Calc-alkalic Composition,PuertoRico, augite, hornblende l-2 3O2 (Lidiak, Edward G.) Charnockite...Intrusive Composition, Labrador, Kiglapait intrusion, augite (Morse, S. A.) l-2 303 Kimberlite Composition,...Richard A., et al.) 3-4 358 Labrador Mineralogy Augite, Kiglapait intrusion (Morse, S. A.) 1-2 303 Laterites...Andesite, Germany, Weiselberg, hypersthene, pigeonite, augite (Nakamura, Yasuo, et a/.) ll-12 1999 Trace elements |  | | 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 | | Economic Minerals . Fig. 2.6 Pyroxene (basaltic augite), big phenocryst in basalt; besides, a second much...coccoliths. From plankton sample of the Kimberley region, Australia, kindly provided by CSIRO Tasmania (picture...2 Volcanic rock: limburgite with phenocrysts of augite in a hyaline matrix. The rock contains a great...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 |  | | Book (edition) | | Sodalite 7.11 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 |
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