 | | Journal (article/letter/editorial) | | combeite- and götzenite-bearing nephelinite at Nyiragongo, Virunga Volcanic Province in the East African...Götzenite Perovskite a b s t r a c t The lavas and pyroclastic rocks of Nyiragongo volcano (East African...nephelinites at Nyiragongo, titanium is hosted in mineral assemblages with Ti-bearing magnetite ± perovskite ± Ti-rich...peralkalinity, götzenite is likely to break down to perovskite-bearing mineral assemblages coexisting with combeite...nephelinite. minor element hosted in oxides (perovskite, Ti-bearing magnetite), mafic silicate minerals |  | | Journal (article/letter/editorial) | | Evolution of the Nyiragongo Magma by TH. G. SAHAMA Department of Geology, University of Helsinki, Finland...5 June 1972) ABSTRACT INTRODUCTION T H E Lake Kivu volcanics in the Western Rift Valley of Central...the South Kivu basaltic rocks. On the other hand, the Virunga (Birunga) volcanic field north of the lake...Nyamuragira (Nyamlagira) and, especially, Mt. Nyiragongo (Niragongo, Niligongo), including their satellitic...lavas will be called the Nyamuragira area and the Nyiragongo area rocks, respectively. The six eastern extinct |  | Minissale, Silvia, Zanetti, Alberto, Tedesco, Dario, Morra, Vincenzo, Melluso, Leone (2019) The petrology and geochemistry of Nyiragongo lavas of 2002, 2016, 1977 and 2017 AD, and the trace element partitioning between melilitite glass and melilite, nepheline, leucite, clinopyroxene, apatite, olivine and Fe-Ti oxides: a unique scenario. Lithos, 332. 296-311 doi:10.1016/j.lithos.2019.02.023 | Journal (article/letter/editorial) | | com/locate/lithos The petrology and geochemistry of Nyiragongo lavas of 2002, 2016, 1977 and 2017 AD, and the...81100 Caserta, Italy d JOC, UN-MONUSCO, UN-Goma, Congo b a r t i c l e i n f o Article history: Received...2019 Available online xxxx a b s t r a c t The Nyiragongo lava of 2002, and the new one flowing from the...found in the Nyiragongo lavas. These new data indicate that the magmatic system of the Nyiragongo is in a...All rights reserved. 1. Introduction The Nyiragongo volcano belongs to the Virunga Volcanic Province |  | Chakrabarti, Ramananda, Sims, Kenneth W.W., Basu, Asish R., Reagan, Mark, Durieux, Jacques (2009) Timescales of magmatic processes and eruption ages of the Nyiragongo volcanics from 238U-230Th-226Ra-210Pb disequilibria. Earth and Planetary Science Letters, 288 (1) 149-157 doi:10.1016/j.epsl.2009.09.017 | Journal (article/letter/editorial) | | of magmatic processes and eruption ages of the Nyiragongo volcanics from 238U-230Th-226Ra-210Pb disequilibria...assessment a b s t r a c t The silica-undersaturated Nyiragongo volcanics, located in the East African Rift,...in 13 recent and prehistoric lava samples from Nyiragongo including those from the 2002 flank eruption and...consistent with high Zr/Hf in the Nyiragongo lavas. The Nyiragongo volcanics have higher (230Th/232Th)...carbonate metasomatism less than 300 ka ago. Several Nyiragongo samples display significant 226Ra excesses implying |  | | Journal (article/letter/editorial) | | Aufs~itze Mineralogical composition of the Nyiragongo rod, s By TrL G. SArr~MA,Helsinki *) With 8 figures...figures and 2 tables Dedicated to Professor Dr. A. RITTMANNon the oeeasion of his 75. birthday Zusammenfassung...Gesteinsanalysen auf die Laven des Nyiragongo-Vulkans in Nord Kivu, Republik Congo (Kinsasha). In dem hetr. vulkanischen...Basanitgruppe (m~il3ig unters~ttigt) und das Nyiragongo-Gebiet mit Gesteinen der Leuzitit-NephelinitMelilitithgruppe...Entstehung des hauptsiichlich melilitithischen Nyiragongo-Magmas mSglicherweise mit karbonatischen Anteilen |  | Chakrabarti, Ramananda, Basu, Asish R., Santo, Alba P., Tedesco, Dario, Vaselli, Orlando (2009) Isotopic and geochemical evidence for a heterogeneous mantle plume origin of the Virunga volcanics, Western rift, East African Rift system. Chemical Geology, 259 (3) 273-289 doi:10.1016/j.chemgeo.2008.11.010 | Journal (article/letter/editorial) | | active Virunga volcanoes, Nyiragongo and Nyamuragira, are 15 km apart. Nyiragongo shows unusual compositions...major, trace elements and Nd–Sr–Pb isotopes in Nyiragongo and Nyamuragira lavas including samples from...from 2002, 2003 and 2004 eruptions. The youngest Nyiragongo lavas are ultrapotassic, ultrasodic and have...basanites and tephrites, distinct from the foiditic Nyiragongo lavas. Both volcanic products show enrichment...Dy/Yb suggests residual garnet in the source(s). Nyiragongo and Nyamuragira lavas show high Nb/U similar |  | | Journal (article/letter/editorial) | | and andremeyerite-bearing nephelinite from Nyiragongo volcano, East African Rift Tom Andersen a,⁎, Marlina...peralkaline leucite nephelinite from the active volcano Nyiragongo in the Virunga province of the East African...mineral. Low-variance mineral assemblages in Nyiragongo nephelinite define a cooling trend from eruptive...East African Rift (Shombole, Oldoinyo Lengai, Nyiragongo). A number of rare minerals that are characteristic...nephelinite from Nyiragongo in the Virunga volcanic province, Democratic Republic of Congo, including götzenite |  | | Journal (article/letter/editorial) | | nephelinites have feldspathoids, clinopyroxene, perovskite and titanomagnetite as the principal minerals...varied nephelinites that contain nosean, melilite, perovskite, garnet, aenigmatite, leucite, feldspar and hauyne...Leucite, Hye: hauyne, Cpx: clinopyroxene, Per: perovskite, M: magnetite, Tm: titanomagnetite, Apat: apatite...titanomagnetite are the main phenocryst phases while perovskite, apatite and sphene are the principal and groundmass...nephelinites at Nyiragongo volcano (Demant et al., 1994; Platz et al., 2004) and at Kivu (Marcelot et al |  | | Journal (article/letter/editorial) | | BP 190, Kinshasa XI, Democratic Republic of the Congo diffusion-controlled melting models), or in a phlogopitebearing...Metasomatism · Virunga volcanic field · Mugogo volcano · Carbonatite Introduction The Virunga volcanic...emitting basalts, basanites and tephrites, and the Nyiragongo erupting foiditic lavas (melilitites, 13 29...west branch are indicated (TA Toro-Ankole, SK South Kivu, R Rungwe). Stippled areas mark the extension of...its eight stratovolcanoes (N Nyamuragira, Ny Nyiragongo, M Mikeno, K Karisimbi, V Visoke, S Sabinyo, |  | Demartin, Francesco, Campostrini, Italo, Castellano, Carlo, Russo, Massimo (2014) Parascandolaite, KMgF3, a new perovskite-type fluoride from Vesuvius. Physics and Chemistry of Minerals, 41 (6) 403-407 doi:10.1007/s00269-014-0668-y | Journal (article/letter/editorial) | | Original Paper Parascandolaite, KMgF3, a new perovskite‑type fluoride from Vesuvius Francesco Demartin...was found as a volcanic sublimate at Vesuvius volcano on 1944 eruption lava scoria, associated with opal...Somma–Vesuvio volcanic complex consists of an older volcano dissected by a summit caldera, Mt. Somma and a...found the analog of synthetic KMgF3, a cubic perovskite-type fluoride (DeVries and Roy 1952; Muradyan...cations fill the dodecahedral cavity in the cubic perovskite phase and their replacement by smaller Na+ cations |  | | Journal (article/letter/editorial) | | also for lava flows from one extensively sampled volcano. Hypotheses involving simple fractional crystallization...Birunga area at the junction of the Congo, south-west Uganda, and north-west Rwanda (see Fig. 1). The Birunga...Nyamlagira (Nyamuragira) and Nyiragongo in the Virunga province of the Congo. Most of the volcanoes in the...FIELD 2 - TORO-ANKOLE FELO 3 - SOUTH KIVU FIELD CONGO LAKE KIVU LAKE. TANSANYIKA\ INDIAN OCEAN FIG...Birunga field. The volcanic field to the south of Lake Kivu, however, consists largely of olivine and tholeiitic |  | | Journal (article/letter/editorial) | | INTRODUCTION Esch (1901) described Mt Etinde as a volcano built (1983) and of Peterson (1989a, 19894). •Present...of Birmingham on May 30, 2015 Mt Etinde is a volcano situated on the southwestern flank of of leucitites...that con- augite, nepheline, leucite, magnetite, perovskite, tain one or more of the following species: nosean...its SrO contents (1953). From the titanite + perovskite + Ti-magneincrease continuously with MgO decrease...lavas. ana upwards limit oi sconae <$"' Gabon : Congo Garnet leucite nephelinites Hauyne nephelinites |  | Onuma, Naoki, Ninomiya, Shuji, Nagasawa, Hiroshi (1981) Mineral/groundmass partition coefficients for nepheline, melilite, clinopyroxene and perovskite in melilitenepheline basalt, Nyiragongo, Zaire. GEOCHEMICAL JOURNAL, 15 (4) 221-228 doi:10.2343/geochemj.15.221 | Journal (article/letter/editorial) | | coefficients for nepheline, perovskite in melilite and basalt, Nyiragongo, Zaire NAOKIONUMA,*SHUJININOMIYA2...1981) Four melilite-, Zaire, new partition perovskite-, Africa. coefficient versus ionic radius...control" for nepheline-, Nyiragongo volcano, mechanism. melilite and perovskite, values are still limited...are least available for nepheline, melilite and perovskite which are important phases in alkali rocks The...diagrams of nepheline, melilite, clinopyroxene and perovskite in an alkali basalt from Niyragongo, Zaire, Africa |  | | Journal (article/letter/editorial) | | disequilibrium dating and trace element geochemistry of perovskite from late Quaternary alkali mafic rocks of the...uni-heidelberg.de; td.ysun@yahoo.de Abstract: Perovskite occurs as an accessory phase in late Quaternary...or briefly after eruptive emplacement. Selected perovskite crystals from four different volcanoes (Rother...Emmelberg) were dated by a novel method of 238U/230Th perovskite geochronology using secondary ion mass spectrometry...(SIMS). In addition, trace element abundances in perovskite were determined by SIMS to provide insight into |  | | Journal (article/letter/editorial) | | 40.509–40.866) along with the data of Karisimbi volcano form trends on isotope diagrams towards the EM...part of Virunga, and Muhavura is the easternmost volcano of the province. Visoke, one of the eight main...summit crater lake (Fig.1). Visoke, along with Nyiragongo and Nyamuragira, are the only volcanoes that...(Bagdasaryan et al. 1973), while for the nearby Karisimbi volcano ages range from 30,000 to 120, 000 years (De Mulder...1992, 1998). However, the last eruption of Visoke volcano occurred in 1957, when two small adventive cones |  | Clague, David A., Frey, Frederick A., Garcia, Michael O., Huang, Shichun, McWilliams, Michael, Beeson, Melvin H. (2016) Compositional heterogeneity of the Sugarloaf melilite nephelinite flow, Honolulu Volcanics, Hawai‘i. Geochimica et Cosmochimica Acta, 185. 251-277 doi:10.1016/j.gca.2016.01.034 | Journal (article/letter/editorial) | | SiO2-undersaturated lavas, 98 such as those from Nyiragongo Volcano (Tazieff, 1977; Tedesco et al., 2007), are...lava composition similar to those erupted at Nyiragongo, the Sugarloaf eruption 101 produced a 15-m...into the 117 underlying shield lavas of Ko‘olau Volcano. Clague and Dalrymple (1987) refer to these lavas...analyses in Wilkinson and Stolz, 1983), a trace of perovskite (U. Hawaii microprobe 218 analysis, Appendix...sets are plotted in Figure 5. Small red-brown perovskite crystals 237 contain ~27.0% TiO2, 57.5% FeO* |  | | Journal (article/letter/editorial) | | perpotassic basaltic rocks were collected from Nyiragongo and Nyamuragira volcanoes located about 300 km...west of Lake Victoria in Africa. The rocks from Nyiragongo are nephelinite, melilitire and leucitite. Phenocrystic...iron oxide, titanaugite, apatite, phlogopite and perovskite. On the other hand, volcanic rocks of Nyamuragira...megacrysts and groundmass comprising olivine, spinel, perovskite, apatite, calcite, dolomite, ankerite and quartz...zone and the east side of median valley in the north of Azores Islands, and by drilling at the IPOD/DSDP |  | Pekov, I. V., Chukanov, N. V., Kononkova, N. N., Zubkova, N. V., Rabadanov, M. Kh., Pushcharovsky, D. Yu. (2008) Elpasolite from hyperalkaline pegmatite of the Khibiny pluton, Kola Peninsula. Symmetry of elpasolite. Geology of Ore Deposits, 50 (8) 749-754 doi:10.1134/s1075701508080114 | Journal (article/letter/editorial) | | as an exhalative mineral of Nyiragongo volcano, Democratic Republic of Congo (Bernard and Hyr š l, 2004)...carbonatite (Goldy); and alkaline volcanic complexes (Nyiragongo). Solely elpasolite from St. Peters Dome and...structure of elpasolite is a derivative of the perovskite structural type. Isolated [AlF6] octahedrons |  | Raghuvanshi, Sneha, Pandey, Ashutosh, Pankaj, Praveer, Rao, N.V. Chalapathi, Chakrabarti, Ramananda, Pandit, Dinesh, Pandey, Rohit (2019) Lithosphere-asthenosphere interaction and carbonatite metasomatism in the genesis of Mesoproterozoic shoshonitic lamprophyres at Korakkodu, Wajrakarur kimberlite field, Eastern Dharwar Craton, southern India. Geological Journal, 54 (5) 3060-3077 doi:10.1002/gj.3468 | Journal (article/letter/editorial) | | Mesoproterozoic diamondiferous kimberlites from direction in north to N–S in the south (Chadwick, Vasudev, & Hegde...silica‐undersaturated ultrapotassic volcanics from Nyiragongo volcano, Low La/Nb (1.1–1.4) ratio compared with...from West Qinling, China (Dai et al., 2018) and Nyiragongo lava, East Africa Rift (Chakrabarti et al., 2009)...Zr/Sm variation plot with compositional field of Nyiragongo lava (Chakrabarti et al., 2009), carbonatites...(compilation from Lustrino et al., 2016), and Nyiragongo lava (Chakrabarti et al., 2009). Note that the |  | 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) | | petrology of the phonolitic to nephelinitic Sadiman volcano, Crater Highlands, Tanzania A.N. Zaitsev a, b,⁎...Mineral stability fields Sadiman volcano a b s t r a c t Sadiman volcano is located in the Crater Highlands...Sadiman. Nepheline + clinopyroxene + titanite ± perovskite ± andradite–schorlomite ± wollastonite ± sanidine...All rights reserved. 1. Introduction Sadiman volcano (3°11′S, 35°25′E), also known as Satiman, is part...as the 1.6–1.5 Ma Oldeani basalt–trachyandesite volcano (Dawson, 2008; Mollel et al., 2008; 2011). ⁎ Corresponding |  | | Journal (article/letter/editorial) | | ascent in active volcanoes. The lava lake in Nyiragongo volcano is located at a height of 3200 m a.s.l.,...→ γ(Mg · Fe)2SiO4(Sp ?) 43% Ca, Fe garnet → perovskite 600 Discontinuity of 680 km γMg2SiO4 → MgSiO3...ilmenite 800 1000 % 60 24 14 2 (Mg, Fe, Ca)SiO3 (perovskite s.s.) MgSiO3 · Al2O3 (ilmenite s.s.) (Mg, Fe)O...1600 1800 3.0 (Ca, Mg, Fe)SiO3 (structure of perovskite) (Mg, Fe)Al2O4 (structure of Ca ferrite) NaAlSiO4 |  | | Journal (article/letter/editorial) | | melilite, phlogopite, nepheline, titanomagnetite and perovskite as major phases, accompanied by minor amounts...carbonates (partly primary), Mg±Mn-ilmenite, perovskite, Ti±Cr-spinel, Ti-magnetite, monticellite, and...The matrix is made up by nepheline, phlogopite, perovskite, Cr-spinel, carbonates, titanomagnetite and glass...accessory apatite. The abundances of phlogopite and perovskite are lower than in the plug and sill facies. The...these. Oxide minerals Oxide minerals include perovskite, Cr-spinel and titanomagnetite, which occur with |  | | Journal (article/letter/editorial) | | 81(3), pp. 411–461 ACCESS Nomenclature of the perovskite supergroup: A hierarchical system of classification...On the basis of extensive studies of synthetic perovskite-structured compounds it is possible to derive...which are derivatives of the arisotypic cubic perovskite structure (ABX3), exemplified by SrTiO3 (tausonite)...of a perovskite supergroup which is divided into stoichiometric and non-stoichiometric perovskite groups...oxide single perovskites of the perovskite subgroup (tausonite, perovskite, loparite, lueshite, isolueshite |  | | Book | | HongKong Barcelona Budapest Professor Dr. A. B. KAMPUNZU Professor Dr. R. T. LUBALA Laboratoire de Petrologie...thank Springer-Verlag, the publishers, especially Dr. W. ENGEL (Geosciences Editorial) for the prompt...Permian times in Thdhak province (Fig. 2) along the north-south trending Tesoffi trough, on the eastern margin...northeastern Africa, especially in the Nile River valley, north from Khartoum towards the Egyptian frontier, the...continental trough on the southern borders of the Congo and Thnzania cratons, though comparable in size |  | Bailey, Ken, Lloyd, Felicity, Kearns, Stuart, Stoppa, Francesco, Eby, Nelson, Woolley, Alan (2005) Melilitite at Fort Portal, Uganda: Another dimension to the carbonate volcanism. Lithos, 85 (1) 15-25 doi:10.1016/j.lithos.2005.03.019 | Journal (article/letter/editorial) | | melilite and apatite in the lapilli, with sparse perovskite, and much platy calcite in some patches. As the...Uvalde nephelinite (Texas) and Nyiragongo volcano (nephelinite, Zaire (D.R. Congo)), as detailed in Deer et...with close similarities to those from Vulture volcano (Italy). A melilite from Vulture (Stoppa and Principe...al. (2003). A good specific case is the Vulture volcano, Italy, (which also has similar features in mineralogy |
|
