 | | Journal (article/letter/editorial) | | 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...deals with the two active western volcanoes, Mt. Nyamuragira (Nyamlagira) and, especially, Mt. Nyiragongo...lava fields. Their lavas will be called the Nyamuragira area and the Nyiragongo area rocks, respectively...various Kivu volcanics remains to be made. Field evidence indicates, however, that the South Kivu volcanism |  | Head, Elisabet, Lanzirotti, Antonio, Newville, Matthew, Sutton, Stephen (2018) Vanadium, sulfur, and iron valences in melt inclusions as a window into magmatic processes: A case study at Nyamuragira volcano, Africa. Geochimica et Cosmochimica Acta, 226. 149-173 doi:10.1016/j.gca.2018.01.033 | Journal (article/letter/editorial) | | into Magmatic Processes: A Case Study at Nyamuragira Volcano, Africa Elisabet Head, Antonio Lanzirotti...into Magmatic Processes: A Case Study at Nyamuragira Volcano, Africa, Geochimica et Cosmochimica Acta...into Magmatic Processes: A Case Study at Nyamuragira Volcano, Africa Elisabet Heada*, Antonio Lanzirottib...Chicago, Argonne, IL 60439, USA Corresponding author: Dr. Elisabet Head, Department of Earth Science, Northeastern...lavas (1938 and 1948) erupted from Nyamuragira volcano (D.R. Congo, Africa). The S, V, and Fe spectroscopic |  | | Journal (article/letter/editorial) | | 1.09) are close to the values found for the Nyamuragira basanites. But the most striking feature is the...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...active volcanoes located only 12 km apart, the Nyamuragira emitting basalts, basanites and tephrites, and...west branch are indicated (TA Toro-Ankole, SK South Kivu, R Rungwe). Stippled areas mark the extension of |  | | Journal (article/letter/editorial) | | Virunga) volcanic province (Fig. 1) is situated north of Lake Kivu. The most important and still active volcanoes...province are Nyamuragira and Nyiragongo. According to Sahama (1973) the Nyiragongo volcano is mostly composed...of phonolitic to tephritic foidite. The Nyamuragira volcano shows tephritic to phonolitic rocks too....basaltic rocks of ~outh Kivu is about 0.3. The volcanic activity in the South Kivu provirce began in Lower...Lueshe is located in the Ruindi Mountains of North Kivu (NE-gaire)~ about 40 km SSW of Lake ~ w a r d |  | 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) | | contrasting compositions between the volcanics to the north and the south (Baker et al., 1971; Furman, 2007)...The relatively more voluminous volcanism to the north is related to the Afar deep-mantle plume with flood...Risques Volcaniques, UNDP/UNOPS, Goma, Nord-Kivu, Congo. 0012-821X/$ – see front matter © 2009 Elsevier...active volcanoes of the VVP, Nyiragongo and Nyamuragira (Fig. 1), Nyiragongo is compositionally unique...(filled circles, see Table 1). Also shown are the Nyamuragira and Karisimbi volcanic planes. 2004; Chakrabarti |  | 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) | | two active Virunga volcanoes, Nyiragongo and Nyamuragira, are 15 km apart. Nyiragongo shows unusual compositions...recorded viscosity among terrestrial magmas while Nyamuragira is unusually effusive. These volcanoes occur...elements and Nd–Sr–Pb isotopes in Nyiragongo and Nyamuragira lavas including samples from 2002, 2003 and 2004...ultrapotassic, ultrasodic and have low SiO2 (36.6 wt.%). Nyamuragira lavas are basalts, basanites and tephrites, distinct...residual garnet in the source(s). Nyiragongo and Nyamuragira lavas show high Nb/U similar to oceanic basalts |  | | Journal (article/letter/editorial) | | 40.509–40.866) along with the data of Karisimbi volcano form trends on isotope diagrams towards the EM...to 0.86 Mg# with Cr2O3 from 0.02 to 1.5% wt., plagioclase corresponds to labradorite (50–70% An). The ore...part of Virunga, and Muhavura is the easternmost volcano of the province. Visoke, one of the eight main...lake (Fig.1). Visoke, along with Nyiragongo and Nyamuragira, are the only volcanoes that have historically...(Bagdasaryan et al. 1973), while for the nearby Karisimbi volcano ages range from 30,000 to 120, 000 years (De Mulder |  | | Journal (article/letter/editorial) | | into magmatic processes: A case study at Nyamuragira volcano, Africa—Elisabet Head, Antonio Lanzirotti...preserved in unconsolidated tephra at El Laco volcano, Chile—J.E. Mungall, K. Long, J.M. Brenan, D. Smythe...in altered carbonatites of the Oldoinyo Lengai volcano, northern Tanzania— E.N. Perova and A.N. Zaitsev...the megabreccias in the Katanga Copperbelt (D.R. Congo)— Jacques L.H. Cailteux, Philippe Muchez, Jana De...of contemporary fumarole activity at Tolbachik volcano (Russia) and Vulcano (Italy)—V.G. Krivovichev and |  | | Journal (article/letter/editorial) | | the mantle lithosphere. In their study of the volcano Karisimbi, De Mulder et al. (1986) and Rogers et...continental rift. It stretches from the Red Sea in the north to its southern extremities in Malawi and can be...Western Rift. However, even the most easterly volcano, Muhavura, has a very youthful morphology and appears...two currently active volcanoes, Nyiragongo and Nyamuragira; a contrast made all the more dramatic by the...volcanoes are separated by <15 km. Nyamuragira is a more typical Virunga volcano erupting K-basanites and evolved |  | Anzures, Brendan A., Parman, Stephen W., Milliken, Ralph E., Namur, Olivier, Cartier, Camille, Wang, Sicheng (2020) Effect of sulfur speciation on chemical and physical properties of very reduced mercurian melts. Geochimica et Cosmochimica Acta, 286. 1-18 doi:10.1016/j.gca.2020.07.024 | Journal (article/letter/editorial) | | expense of 29 forsterite, and destabilizing plagioclase and clinopyroxene. These shifts cause the initial...solidified magma ocean to be enstatite-rich and plagioclase poor. Our results on S 31 speciation at low...minerals rich in 94 these oxides (e.g. olvine and plagioclase). Cations bonded with S will be available to...of 550 the residual melt at the timing of plagioclase saturation (Elkins-Tanton et al., 2011; Jolliff...561 phases (olivine, pigeonite, augite, and plagioclase) (Bell & Rossman, 1992; Hirschmann et al., 562 |  | | Book | | bastonite), or a member of a continuous series (€ the plagioclase series) got a name, with for th • latter different...Buttgenbach H. (1 947) Les Mineraux de Belgique et du Congo Beige. 573 p. Paris: Ed. Dunod. Cesbron, F. (1985)...the government of the Democratic Republic of the Congo introduced a new admin istrative subdivision for...Haut-Loma mi Province. What formerly was called the Bas-Congo Province is known today by the name of Central Kongo...abbreviated (B = Belgium; D.R. Congo = Democratic Republic of the Congo; F = France). 4. The biographical |  | | Journal (article/letter/editorial) | | al., 1981). Melilitite (ST-2) from Nyiragongo volcano, East Africa (Aoki et al., 1985b), is used as a...basalt series, was collected from Fuji volcano situated at the just north of the meeting point of three plates...Honshu. High alumina basalt from Ichinomegata volcano normalized to Si02=52% is also shown in the figure...REE relative to the Fuji high alumina basalt from north of the Izu peninsula. The REE oxide phases, and...depletion in Nb. The Quaternary basaltic rocks from north- JA-1 tholeiitic andesite (or dacite) together |  | Sutton, S.R., Lanzirotti, A., Newville, M., Dyar, M. Darby, Delaney, J. (2020) Oxybarometry and valence quantification based on microscale X-ray absorption fine structure (XAFS) spectroscopy of multivalent elements. Chemical Geology, 531. 119305 doi:10.1016/j.chemgeo.2019.119305 | Journal (article/letter/editorial) | | (Dyar et al., 2016a; Monkawa et al., 2006), plagioclase (Satake et al., 2011), and garnet (Berry et al...preserved in tephras and lavas from Nyamuragira volcano (D.R. Congo, Africa) (Fig. 16). The fO2 estimates...results for melt inclusions in olivine from Nyamuragira volcano (after Head et al., 2018). prominent absorption...into magmatic processes: a case study at Nyamuragira Volcano Africa. Geochimica et Cosmochimica Acta 226...iron micro-XANES analysis of maskelynite and plagioclase. (No. 29), Photon Factory Activity Report. Sato |  | | Journal (article/letter/editorial) | | Petrology of Calc-alkaline Lavas from Ruapehu Volcano and Related Vents, Taupo Volcanic Zone, New Zealand...Nearly all are porphyritic with phenocrysts of plagioclase, augite, olivine (mainly in basalts and basic...geochemically and isotopically distinct: Type 1 plagioclase-pyroxene phyric lavas dominate, and range from...Type 1 lavas and becomes important in Type 2 (plagioclase-phyric) and Type 3 (pyroxene-phyric) lavas. Type...hornblende-bearing andesites from nearby Maungakatote volcano. Type 5 lavas are clinopyroxene-olivine-phyric |  | | Journal (article/letter/editorial) | | Mana et al., na (2015) suggest that within the North Tanzania Divergence, melting depths range from 140-85...In particular, the composition of lavas from Nyamuragira, Karisimbi, Sabinyo, Muhavura, old Bisoke, and...enriched (excluding carbonatites) are from the Virunga-Kivu region. More evolved samples (i.e., lower MgO) are...for a Nd/144Nd, in comparison to Turkana and the North Kenya Rift that have less Journal Pre-proof radiogenic...typically contain olivine, clinopyroxene, and plagioclase; with increasing differentiation apatite and | | | Journal (article/letter/editorial) | | residual from an alkali basalt ene, Fe-Ti oxide, plagioclase, phases. Trace element contents agreement in... tr, trace (less than 0.1%); -, absent; P1, plagioclase; K‑f,alkalifeldspar; Mt, magnetite; Gm, groundmass...atom%)で alkalis"の ト 成 分 は 平 均5.4 あ る。 欝 陵 島 の Nyamuragira(Aoki で あ り,イ タ リ ア のVico の も の よ りKとNaに リュ...Symbols and variation letter symbols of plagioclase as in Fig. 2. of the various rock types...(1985), Petrology and geochemistry of the Nyamuragira volcano, Zaire. J. Volcanol. Geotherm. Res., 25, |  | | 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 | | | Journal (article/letter/editorial) | | Petrology ‑ Trace 林 of Ghokai elements 信 太 volcano. Part III and petrogenesis‑ 郎(Shintaro Hayashi)*...Twenty-seven representative volcanic rocks from Chokai volcano, Northeast Japan, were analysed for Co, Sc, Sr...and Ca-rich plagioclase, while less Mg-rich augite, hypersthene, and Na-rich plagioclase were crystallizing...element abundances 信 太郎 of the rocks from Chokai volcano OLB, olivine-bearing rocks; OLF, olivine-free...olivine‑free felsic andesite from 信 太 郎 of plagioclase in olivine‑bearing rocks (stages I,II, and III) |  | | Report (volume) | | DELGADO, H. Particles from the plume of Popocatepetl volcano, Mexico - the FESEM/EDS approach 123 MCGONIGLE...emissions 149 GERLACH, T. M. Elevation effects in volcano applications of the COSPEC 169 CARN, S. A., KRUEGER...proxies for plume chemistry at Soufrière Hills volcano, Montserrat 203 Part III Field investigations...high-frequency gas monitoring at Soufrière Hills volcano, Montserrat 219 vi CONTENTS WARDELL, L. I...emissions from fumarolic ice towers, Mount Erebus volcano, Antarctica 231 VASELLI, O., TASSI, F, MINISSALE |  | Tassara, S., Reich, M., Cannatelli, C., Konecke, B.A., Kausel, D., Morata, D., Barra, F., Simon, A.C., Fiege, A., Morgado, E., Leisen, M. (2020) Post-melting oxidation of highly primitive basalts from the southern Andes. Geochimica et Cosmochimica Acta, 273. 291-312 doi:10.1016/j.gca.2020.01.042 | Journal (article/letter/editorial) | | limits with the flatslab subduction segment to the north at ~32° S, and with the subduction of the Chile...most simply explained by plagioclase crystallization. However, although plagioclase can be found in the basaltic...selectively erupted olivine and not plagioclase. Therefore plagioclase crystallization could not have been...Lima, A. and De Vivo, B. (2016) Understanding a volcano through a droplet: a melt inclusion approach. Journal...into magmatic processes: A case study at Nyamuragira volcano, Africa. Geochimica et Cosmochimica Acta |  | | Report (issue) | | H. Particles from the plume of Popocatépetl volcano, Mexico — the FESEM/EDS Ws approach McGONIGLE...emissions 149 GERLACH, T. M. Elevation effects in volcano applications of the COSPEC 169 CARN, S. A., KRUEGER...proxies for plume chemistry at Soufriere Hills volcano, Montserrat Part III Field investigations of degassing...high-frequency gas monitoring at Soufriere Hills volcano, Montserrat ING, Vi CONTENTS WARDELL, L. J...emissions from fumarolic ice towers, Mount Erebus volcano, Antarctica VASELLI, O., TASSI, F., MINISSALE, |  | SANTACROCE, R., BERTAGNINI, A., CIVETTA, L., LANDI, P., SBRANA, A. (1993) Eruptive Dynamics and Petrogenetic Processes in a very Shallow Magma Reservoir: the 1906 Eruption of Vesuvius. Journal of Petrology, 34 (2) 383-425 doi:10.1093/petrology/34.2.383 | Journal (article/letter/editorial) | | how greatly and rapidly the eruptive style of a volcano can change during a single event (Rittmann, 1962;...already present at very shallow depth beneath the volcano when the eruption started. This body formed over...and contain clinopyroxene (7-10 vol.%), rare plagioclase, and biotite phenocrysts. Leucite grains are...in the honeycoloured glassy groundmass, where plagioclase, clinopyroxene, and biotite are relatively scarce...contain leucite aggregates. Rare biotite and plagioclase phenocrysts occur sporadically. The same minerals |  | | Book (chapter) | | eruptions becomes difficult, thus obscuring the volcano-cli mate link in the remote past. Even for recent...box of magma sitting in a reservoir beneath a volcano prior to eruption. This model magma contains crystals...STRATo.�'l VOLCANO CONTINENTAL RIFT ZONE (yOUNG DIVERGENT PLATE BOUNDARY) / SHIElD VOLCANO f LITHOSPHERE...(a) A Plinian eruption column rises from Lassen Volcano, California, on 22 May 1915. Photo taken from Anderson...eruption column, rises above Alaska's Redoubt volcano on 21 April 1990. The eruption column did not issue |  | | Book (edition) | | 1943, six weeks after the first appearance of the volcano. See pp. 316-18 {Three Lions Inc., New York) Arthur...been given by Professor Tom F. W. Barth, Dr Lucien Cahen, Dr Lauge Koch, Professor L. Egyed, Professor...colleagues at the Lamont Geological Observatory), Dr R. W. Girdler, Professor W. Nieuwenkamp and Professor...constructive criticisms. To my wife and fellow geologist, Dr Doris L. Reynolds, I am, as always, more deeply indebted...Sub-stages of the Quaternary Ice Age The Great Lakes of North America Recession of the Scandinavian Ice Sheet |  | | Report (volume) | | SURVEY BULLETIN 1021-B A report of the Hawaiian Volcano Observatory UNITED STATES GOVERNMENT PRINTING...earthquake epicenters and the submarine shield volcano south of Hawaii ______________ 6. Graph showing...Seismographs and tiltmeters operated by the Hawaiian Volcano Observatory during 1952__________-_________-___-_____-_...earthquakes stronger than tremors recorded at Hawaiian Volcano Observatory during 1952_______________________... 3. Distant earthquakes recorded at Hawaiian Volcano Observatory during 1952_______________________________ |
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