 | Garrison, Jennifer M., Sims, Kenneth W. W., Yogodzinski, Gene M., Escobar, Ricardo D., Scott, Sean, Mothes, Patricia, Hall, Minard L., Ramon, Patricio (2018) Shallow-level differentiation of phonolitic lavas from Sumaco Volcano, Ecuador. Contributions to Mineralogy and Petrology, 173 (1) doi:10.1007/s00410-017-1431-4 | Journal (article/letter/editorial) |
| not observed in the nearby volcanoes Antisana, Pan de Azucar or El Reventador suggesting that its unique...by three volcanoes; Sumaco, El Reventador and Pan de Azucar (Fig. 1). Of these, Sumaco is commonly chosen...chain, Hildreth et al. 2004). Interestingly, Pan de Azucar and El Reventador volcanoes, located respectively...Reventador, Pan de Azucar, and Antisana volcanoes as well as the El Puyo-Mera scoria cones and lava domes. Shaded...Reventador and Sumaco, although an extinct volcano, Pan de Azucar, is located 10 km to the north of Sumaco. |
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| GEOLOGINEN TUTKIMUSLAITOS BULLETIN DE LA C O M M I S S I O N GEOLOGIQUE DE FINLANDE S U O M E N G E O L...SALLSKAPET I FINLAND COMPTES R E N D U S DE LA SOCIETE GEOLOGIQUE DE F I N L A N D E XXXIII 7 5 - V U O T...Microradiographic Distinction between Nepheline and Kalsilite in Thin Section . . . . . . . . . . . . . . .... . . . . . . .. . . 4 Bulletin de 1%Commission géologique de Finlande N:o 196. Sivu - Page . ...edellisenä 10-vuotiskau- 6 Bulletin de la Commission géologique de Finlande N:o 196. tena, ja sitä oli |
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| GEOLOGINEN TUTKIMUSLAITOS BULLETIN DE LA C O M M I S S I O N GEOLOGIQUE DE FINLANDE S U O M E N G E O L...SALLSKAPET I FINLAND COMPTES R E N D U S DE LA SOCIETE GEOLOGIQUE DE F I N L A N D E XXXIII 7 5 - V U O T...Microradiographic Distinction between Nepheline and Kalsilite in Thin Section . . . . . . . . . . . . . . .... . . . . . . .. . . 4 Bulletin de 1%Commission géologique de Finlande N:o 196. Sivu - Page . ...edellisenä 10-vuotiskau- 6 Bulletin de la Commission géologique de Finlande N:o 196. tena, ja sitä oli |
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| Professor Dr. R. T. LUBALA Laboratoire de Petrologie Universite de Lubumbashi, B. P. 1825 Lubumbashi - Zaire...individual chapters: i) the carbonatitic-alkaline province outcropping on the Kenya-Uganda border which have...Petrogenesis of the volcanic rocks of the Karoo Province edited by ERLANK (1984). In addition, a review...review paper related to this volcanic province appeared in the book devoted to the Flood Basalts Provinces...same applies to the Oceanic volcanism (except the Canary Is.). The book is subdivided into four parts centring |
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| . . . . . . . . . . . . . . . . . . . . . .. Kalsilite. . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . Birunga Volcanic Province . . . . . . . . . . . . . . . . . Leucite-Bearing.... . . . . . . Potassic Rocks of N avaj o-Hopi Province (USA) . . .. Leucite-Bearing Rocks of Leucite...Eolian Arc Region . . . . .. Volcanic Provinces of Spain ................ Leucite-Bearing Lamprophyres of...Leucite-Bearing Rocks of the Tristan da Cunha Islands .............................. 5.14 Leucite-Bearing |
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| 49--62%). Ein Vergleida der Zusammensetzung der Lava und der Pyroklastika zeigt jedoch, dal3 die Magmen... Aufsiitze of the ignimbrites are typical of pyroclastic flow deposits with clasts ranging from a metre to a few...in individual flow units. Each ignimbrite is composed of a large number of individual flow units each having...is believed to be that of a semi-fluidised debris flow. Viscosities of the pyroclastic flows, estimated...ignimbrites have formed from a gas super-saturated lava or froth flow is incompatible with their field and grain |
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| Abstract. Experimental study of natural alkalic lava compositions at low pressures (pO2 ~ QFM) reveals...facilitate graphical analysis of the evolution of lava compositions during hypabyssal cooling. Use of (TiAlz)(MgSi2)_...significant role in the petrogenesis of many alkalic lava suites from both continental and oceanic settings...evident in the major element chemistry of these lava suites than in many tholeiitic suites of comparable...Baldridge et al. 1981), and a mikenitic leucitite lava from Mt. Nyiragongo, North Kivu, Zaire (20421; Sahama |
 | Stelten, Mark E., Downs, Drew T., Dietterich, Hannah R., Mahood, Gail A., Calvert, Andrew T., Sisson, Thomas W., Zahran, Hani, Shawali, Jamal (2018) Timescales of magmatic differentiation from alkali basalt to trachyte within the Harrat Rahat volcanic field, Kingdom of Saudi Arabia. Contributions to Mineralogy and Petrology, 173 (8) doi:10.1007/s00410-018-1495-9 | Journal (article/letter/editorial) |
| Cenozoic lava fields are from Coleman et al. (1983) and Camp and Roobol (1989) 13 1256 CE basalt flow Harrat...eruption at 1256 CE having produced a basaltic lava flow in the northern part of the volcanic field (Fig...shown in Fig. 4. The historic (1256 CE) basaltic flow in northernmost Harrat Rahat is shown in black....at least 15 Cenozoic harrats (Arabic for basaltic lava field) that stretch ~ 3000 km from Yemen to Syria...thermal erosion of the lithosphere due to northward flow of asthenosphereic material related to the Afar |
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| distribution in all the continents and oceanic islands (Chap. 4), major minor, trace and isotopic geochemistry...Experimental studies on the system nepheline-kalsilite-SiO2 in air and under 1, 2, 3, 5, and 20 kb in...at variable temperatures show that leucite and kalsilite-bearing mafuritic rocks are represented under...and Somma-Vesuvius of Italy and the Bufumbira province of equatorial Africa, K-rich silica undersaturated...understood from the study of the system forsterite-kalsilite-SiO2 in presence of excess water at 1, 2, and |
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| is the only known intra-plate alkaline volcanic province which straddles a continental margin. It consists...extensive lava plateaux in Cameroon and northern Nigeria, and extends offshore into the islands and seamounts...continental alkaline volcanism within a single province makes the Cameroon line a unique area in which...plag-(-ol-augite)-phyric transitional basalt (S wall of Lac de la Femme, Eboga caldera (Manengouba), Cameroon);...ol-augite-phyric transitional basalt (N-S dyke, Praia de Sta. Rita, N coast of Principe); P 18, olivine nephelinite |
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| ( 359 ) XIV.—The Kalsilite-bearing Lavas of Kabirenge and Lyakauli, South-West Uganda. PART I by A....VOLCANIC FlELD II. T H E KABIRENGE AND LYAKAULI . LAVA . 359 . 359 OCCUR- RENCES 361 PART II.—PETROLOGY...Varieties and Sequence . B. Welded Katungite Tuff C. Kalsilite-katungite Tuffs . . 370 371 371 372 372 372...PETROLOGY O P T H E T U F F S Leucite-mafurite . . . Kalsilite-ugandite . . Mafurite with Accessory Melilite...Melilite-mafurite. . . Leucite-melilite-mafurite Kalsilite-melilite-ugandite Petrochemistry of the Suite |
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| COEXISTING Ba-FELDSPAR AND MELILITE IN A MELAFOIDITE LAVA AT MT. VULTURE, ITALY: ROLE OF VOLATILES AND ALKALINE...via Mezzocannone 8, I–80134 Napoli, Italy Roberto de’ GENNARO Centro Interdipartimentale Strumentazioni...in the groundmass of the S. Caterina melafoidite lava, Mt. Vulture, Italy. The accompanying phases are...Sommaire Un feldspath alcalin enrichi en barium (de la série hyalophane jusqu’à celsian presque pur)...coexiste avec une mélilite dans la matrice de la lave mélafoïditique de S. Caterina, au mont Vulture, en Italie |
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| volcanic rocks from south-west Uganda containing kalsilite (a polymorph of KA1Si04). (With Plate VI.) By...CONTENTS. 209 210 200 6. i~ELILITE-MAFURITE 7. KALSILITE-KATUNGITE 8. RELATIONSHIPS: 201 202 202 203 207...KA1Si04 for which the appropriately mnemonic name kalsilite is proposed. The present communication is devoted...discovered kalsilite-bearing lavas. ~zG. 1. Sketch-map showing the explosion craters and lava occurrences...Uganda. Karagwe-Ankolean system--inclined shading; lava occurrences--black; tufts unshaded; crater lakes---dotted |
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| the coarse-grained basic part of a thick komatiite lava would logically be called a gabbro (following, for...suspended in it. A good example would be flowing lava which contains crystals suspended in the melt (Fig...solid and liquid states of matter present in the lava. Melt, on the other hand, refers to the molten state...a molten lava and (b) the same lava in the solid state. magma and melt, once the lava flow had solidified...estimated by crushing up a sample of the solidified lava, including both phenocrysts and groundmass (ensuring |
 | Di Battistini, G., Montanini, A., Vernia, L., Venturelli, G., Tonarini, S. (2001) Petrology of melilite-bearing rocks from the Montefiascone Volcanic Complex (Roman Magmatic Province): new insights into the ultrapotassic volcanism of Central Italy. Lithos, 59 (1) 1-24 doi:10.1016/s0024-4937(01)00054-8 | Journal (article/letter/editorial) |
| Montefiascone Volcanic Complex žRoman Magmatic Province/: new insights into the ultrapotassic volcanism...potassic to ultrapotassic rocks of the Roman Magmatic Province ŽRMP., ranging in composition from trachybasalts...leucite melilitites, occurring as small lava flows, and of kalsilite–melilite pyroclastic ejecta, further...ejecta Žkalsilite melilitolites and clinopyroxene–kalsilite melilitolites. can be considered as intrusive...highly potassic volcanism of the Roman Magmatic Province ŽRMP., whose centres are distributed along the |
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| A Z I N E , MARCH 1993, VOL 57, PP. 165-171 Kalsilite in Brazilian kamafugitic rocks THIS paper describes...occurrence of kalsilite in Brazilian lavas and cognate subvolcanic rocks. The presence of kalsilite in these...Proterozoic basement rocks of the Bambuf Group. The lava crops out in the studied area as discontinuous small...not be present: olivine, phlogopite, leucite, kalsilite, apatite, melilite, and glass. Four rock samples...were chosen for the study of kalsilite (Table 1 and Fig. 2a-d); kalsilite is only represented by pseudomorphs |
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| “hydrothermal” carbonatites in the Roman Volcanic Province, previously considered to be lacustrine deposits...Carbothermal residua carbonatites from Roman Volcanic Province volcanoes are for the first time described and...phonolitic foidite, including two lava flows of olivine-leucite-kalsilite melilitite (local name: SC venanzite)...Cupaello is a 2–4 m thick kalsilitite to kalsilite melilitite lava flow, which has preserved a 4 m-thick AC...kalsilitite/carbonatite agglomerate beneath the flow. Vent cone pyroclastics are vitrophyric ash, containing |
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| from the northern part of the Roman perpotassic province. The samples comprise the tephritic leucititic...olivine leucite melilitite of San Venanzo, and the kalsilite diopside melilitite of Cupaello. Previous oxygen...evidence and is probably valid for the entire Roman Province. 1. Introduction I n recent papers [1-6] the...the R o m a n Pliocene to Recent m a g m a t i c Province has been interpreted to be an example of hybrid...District (Fig. l), the most northerly part of the province, was considered to be the site of the strongest |
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| rocks, carbonatites, melilite-bearing rocks, kalsilite-bearing rocks, kimberlites, lamproites, leucite-bearing........................................ 11 2.5 Kalsilite-bearing rocks ................................................. 9 2.5 Mineral assemblages of kalsilite-bearing volcanic rocks .........................classification schemes such as the R1–R2 scheme of De La Roche, it is regrettable that this potentially...length were the classification of the melilite-, kalsilite- and leucite-bearing rocks and the chemical distinction |
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| could be carried deeper into the mantle. For buoyant flow up the slab/mantle interface solubility was calculated...that at deeper or shallower levels). For vertical flow from slab to mantle wedge, massive decrease in SiO2...Conference Abstracts 2008 Indications for convective flow induced by focussed fluid venting at bacterial mats...center of the bacterial mat creates a convective flow cell with bottom waters penetrating into the adjacent...adjacent sediment area and directed towards the flow channel. A 2-D transport-reaction model with cylindrical |
 | Sharygin, Victor V., Pekov, Igor V., Zubkova, Natalia V., Khomyakov, Alexander P., Stoppa, Francesco, Pushcharovsky, Dmitry Yu. (2013) Umbrianite, K7Na2Ca2[Al3Si10O29]F2Cl2, a new mineral species from melilitolite of the Pian di Celle volcano, Umbria, Italy. European Journal of Mineralogy, 25 (4) 655-669 doi:10.1127/0935-1221/2013/0025-2306 | Journal (article/letter/editorial) |
| across). Umbrianite is commonly associated with kalsilite, leucite, fluorophlogopite, melilite, olivine...a part of a Pleistocene kamafugite-carbonatite province located along grabens in the Appenines (Fig. 1)...Boncio, 2000). The Pian di Celle tuffring and lava flow belong to the San Venanzo volcanic complex, which... 1998; Zanon, 2005), in which the lava flow is a leucite–kalsilite–olivine melilitite (the local name:...form a dykelet swarm in the NE flow front of the Le Selvarelle venanzite lava of the Pian di Celle volcano |
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| leucitite lava (cecilite), Alban Hills, Italy L. MELLUSO1,*, S. CONTICELLI2,3 1 2 3 4 AND R. DE’ GENNARO4...in the 290 ka Capo di Bove melilite-leucitite lava flow of the Alban Hills volcanic complex (Italy). Kirschsteinite...melilite-bearing leucitite, Capo di Bove, Alban Hills, Roman Province, Italy. Introduction KIRSCHSTEINITE (CaFeSiO4)...and crystallization conditions of the Capo di Bove lava through detailed chemical analyses of the bulk rock...largest volcanic complexes in the Roman Magmatic Province (Washington, 1906; Avanzinelli et al., 2009; Conticelli |
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| close to lamproite in composition. Nepheline and kalsilite from both lavas contain high alkalis (+ Ca), relative...khibinskite, K4ZrzSi40~4, found in the Cupaello lava, may be regarded as a Si-poor variety of wadeite...indicated by the quartz-normative glass of the Gaussbcrg lava. Mantle compositions corresponding to wehrlite-clinopyroxenite...association olivine + clinopyroxene + melilite+leucite+kalsilite, and absence of feldspars (Holmes 1942; Morbidelli...and sand deposits of Pliocene age. The S. Venanzo lava, located in Pian di Celle Podere Pantano, about |
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| carbonatite occurrence associated with “kamafugite” lava at Cupaello, central Italy. This carbonatite occurrence...Mount Vulture, delineating an important magmatic province along the most peripheral belt of the Tyrrhenian...Tyrrhenian extensional tectonic system. This province is distinct, but probably related genetically with the...and Stoppa 1994), is characterised by lower heat flow, thicker lithosphere and stronger seismic activity...carbonatite tuff sequence at the base of the Cupaello lava flow and documents a direct genetic relationship between |
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| between the alkali feldspars and the nepheline-kalsilite series would suggest existence of similar phenomena...Phenocrysts in lava Phenocrysts in bomb 22 — 13 15 17 18 19 33 1 1 Phenocrysts in flow Phenocrysts...Phenocrysts in flow Phenocrysts in flow Phenocrysts in flow Phenocrysts in flow Phenocrysts in flow Phenocrysts...Phenocrysts in flow Phenocrysts in flow Phenocrysts in flow Phenocrysts in intravolcanic dyke Phenocrysts in flow...flow Phenocrysts in flow Phenocrysts in intravolcanic dyke Phenocrysts in intravolcanic dyke Phenocrysts |
