 | | Journal (issue) | | Minerals from the Volcanic District of Laacher See, Germany..................................................Lieber Heidelberg, West Germany Olaf Medenbach Bochum-Querenburg, West Germany Eric Offermann Arlesheim...desire is to visit Norway on collecting tours. In Germany there are still more, also with their own jour...from earlier visitors. A “Director of Studies” in Germany has given out, despite Norwegian protests, a guide...served as The first probings in the Lengenbach quarry BINNA VALLEY. cook while Leopold Jentsch was the |  | | Book (volume) | | (Specord 75 IR or Specord M80, Carl Zeiss, Jena, Germany), Perkin Elmer 1600 Series FT IR spectrometer or...FT IR spectrometer (Bruker Optics, Ettlingen, Germany). IR spectrum of a pure KBr disc was subtracted...Mg3B7O13Cl Locality: Wandsleben, Saxony-Anhalt, Germany. Description: White to beige fine-grained aggregate...Lüneburger Kalkberg, Lüneburg, Lower Saxony, Germany (type locality). Description: White fibrous aggregate...Locality: Kohnstein Quarry, Niedersachswerfen, Nordhausen, Harz, Thuringia, Germany. Description: White |  | | Journal (issue) | | FERRIERITE Ferrierite-NH4 Type locality: Libous Quarry, Chomutov District, Usti and Labern Region, Czech...further growth within the rapidly cooling glass. Cristobalite is often that first mineral, and this results...the regions grow a little further, spheres of cristobalite segregate, often shrinking to leave voids in...from Coso Hot Springs are Fig. 1. Fayalite on Cristobalite very thin and very clear (fig. 1). Coso Hot...outgassing can generate a froth that solidifies into scoria. Again, vapors present can produce small crystals |  | | Report (issue) | | stone, ignimbrite is sawn or broken away from a quarry face along natural cooling joints and then fashioned...current topic of active research by groups in Germany and Italy. volcanic particles. Volcaniclastic...would be no pumice or scoria. By studying bubble walls (shards), pumice and scoria, it is possible to relate...contains <25% by volume lapilli and ash. Pumice, scoria, and cinders are named without reference to size...bubble walls are composed of translucent glass. 7 Scoria (also called cinders) are mafic particles that |  | Nadeau, Olivier, Mick, Emily, Robidoux, Philippe, Grassa, Fausto, Brusca, Lorenzo, Voinot, Alexandre, Leybourne, Matthew I. (2021) Lithium isotopes and Cu-Au concentrations in hydrothermal alterations from Solfatara Volcano, Campi Flegrei caldera complex, and La Fossa volcano, Vulcano Island, Italy: Insights into epithermal ore forming environments. Ore Geology Reviews, 130. 103934pp. doi:10.1016/j.oregeorev.2020.103934 | Journal (article/letter/editorial) | | sulfidation epithermal veins. At La Fossa, α-cristobalite is responsible for shifts in δ7Li values, ranging...invasion of the samples by α-cristobalite. The combination of α-cristobalite, increases in δ7Li values,...higher δ7Li and lower Cu-Au values dominated by α-cristobalite. * Corresponding author. E-mail address: nadeau...tephra, the 4445 y. old Santa Maria delle Grazi scoria, Olibano tephra and Monte Olibano lava dome, the...containing fibrous silica, native sulfur and cristobalite (Fulignati et al., 2002). It is also associated |  | | Journal (article/letter/editorial) | | Inslilul dcr Universitiit, Federal Republic of Germany D-8700 Wiirzburg, and G. Hentschel Plilznerslr...Plilznerslr. 5, D-6200 Wiesbaden, Federal Republic of Germany Dedicated to Prof Dr. F. Liebau on the occasion...xenolith from the Sattelberg scoria cone near Kruft in the Eifel district, Germany. It occurs as bluish-green...330440, D-2800 Bremcn 33, Fedcral Republic of Germany. der U nivcrsitiit, ** Present address: lnstitut...About ten years ago Dr. H. E. Kunzel (Dormagen/Germany) found an unusual xenolith bearing a number of |  | | Journal (article/letter/editorial) | | Inslilul dcr Universitiit, Federal Republic of Germany D-8700 Wiirzburg, and G. Hentschel Plilznerslr...Plilznerslr. 5, D-6200 Wiesbaden, Federal Republic of Germany Dedicated to Prof Dr. F. Liebau on the occasion...xenolith from the Sattelberg scoria cone near Kruft in the Eifel district, Germany. It occurs as bluish-green...330440, D-2800 Bremcn 33, Fedcral Republic of Germany. der U nivcrsitiit, ** Present address: lnstitut...About ten years ago Dr. H. E. Kunzel (Dormagen/Germany) found an unusual xenolith bearing a number of |  | | Journal (article/letter/editorial) | | have been identified: those are Al– Si glass, αcristobalite, moissanite, native iron with a phosphorus admixture...weakly sintered black shale alluvium (5–7 cm); (2) a scoria–porous pumicelike layer (2– 4 cm); (3) glass,...techniques has been applied to study the glass, scoria, and target rocks along with the newly formed ironbearing...ironbearing minerals from the glasses and scoria. The mineral phase compositions have been NorthEast...*email: museum@neisri.ru Central channel Glass Scoria Pebble Fig. 1. Structure of the Kolyma fulgurite |  | EJIMA, Terumi, YONEDA, Mari, AKASAKA, Masahide, OHFUJI, Hiroaki, KON, Yoshiaki, NAGASHIMA, Mariko, NAKAMUTA, Yoshihiro (2017) Precipitates within olivine phenocrysts in oxidized andesitic scoria from Kasayama volcano, Hagi, Japan. Journal of Mineralogical and Petrological Sciences, 112 (3) 116-126 doi:10.2465/jmps.161219 | Journal (article/letter/editorial) | | within olivine phenocrysts in oxidized andesitic scoria from Kasayama volcano, Hagi, Japan Terumi EJIMA*...sensitive recorder of the oxidation conditions of scoria. The crystallization process of precipitates within...within olivine phenocrysts in andesitic scoria from Kasayama volcano, Hagi, Yamaguchi Prefecture, Japan...host olivine phenocrysts. The scoria in the interior of the Kasayama scoria cone is red–brown, and the outer...(Fo79–81) within the black scoria lack precipitate minerals, but those in the black scoria with red– brown tint |  | EJIMA, Terumi, AKASAKA, Masahide, NAGAO, Takashi, OHFUJI, Hiroaki (2013) Oxidation states of Fe and precipitates within olivine from orthopyroxene-olivine-clinopyroxene andesite lava from Kasayama volcano, Hagi, Yamaguchi, Japan. Journal of Mineralogical and Petrological Sciences, 108 (1) 25-36 doi:10.2465/jmps.120621a | Journal (article/letter/editorial) | | consisting of orthopyroxene, maghemite, hematite, cristobalite and amorphous silica in olivine that formed...with cryptocrystalline precipitates in andesitic scoria, and concluded that Mg-rich olivine and the precipitates...Sea of Japan Cpx-Ol andesitic scoria S2 S1 Opx-Cpx-Ol andesitic scoria L4 Opx-Ol-Cpx andesite lava...in olivines from the variously oxidized Kasayama scoria and lava, and suggested existence of Fe3+ in those...andesite lava; S1, Opx-Cpx-Ol andesitic scoria; S2, Cpx-Ol andesitic scoria. and has been regarded to be of |  | | Journal (article/letter/editorial) | | and lies immediately on top of a layer of reddish scoria. Vesicles in the flow are typically a few millimeters...at the base of the flow where it contacted the scoria layer, a wider variety of small crystals have been...been found in the vesicles. These include cristobalite, diopside, fluoro-edenite, hematite, magnetite...and other trace elements were introduced from the scoria layer directly below, resulting in more variety...Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, Germany DOI: 10.1127/0077-7757/2010/0163 www.schweizerbart |  | | Journal (article/letter/editorial) | | tridymite, and magnetite are common; acmite, cristobalite, hematite, hyalite, rutile, hornblende, pseudobrookite...the general area. The plug is mantled with red scoria and grades into light-gray andesite in the interior... Little or no glass appears to be present. The scoria grades into an intermediate zone which ranges between...average -0.5 mm; X-rajr pattein avaiiable. " Cristobalite, ( 1 Commonly spherical aggregates; colorless;...origin of such cavity suites' Tridymite and cristobalite in cavities can be deposited from a vapor phase |  | | Journal (article/letter/editorial) | | hypersthene. A peak at 4.14 Å characterizes β-cristobalite.* The diffracto gram of the heavy fraction...tion zone is characterized by the absence of β-cristobalite (4.14 A) and hypersthene (3.20 A) peaks and...accompanied by the formation of hypersthene and cristobalite, and the relict olivine becomes richer in magnesium...the grain is accompanied by the formation of β-cristobalite. The relative increase in magnesium concen...oxidation of scoria and the concentration of acid gases in gas condensates extracted from scoria. temperature |  | | Report (issue) | | acid-sulfate leaching of permeable andesitic breccia and scoria in the core of the stratocone. The grade of this...Mount Adams outside of its highly brecciated and scoria-rich summit zone. No widespread tephra layers are...have been the principal site of accumulation of scoria, agglutinate, and especially breccias that preferentially...alunite [(K,Na)Al3(SOd)2 (OH^], and silica (opal, cristobalite, and quartz) are dominant (Hemley and others...especially in flow breccias and scoria deposits and associated with opal or cristobalite as films and fracture |  | | Book | | metasomatic sanidine from Volkesfeld, Eifel Mts., Germany contains only traces of structurally bound hydrogen...FT IR spectrometer (Bruker Optics, Ettlingen, Germany) with a resolution of 4 cm−1 and 16 scans. IR spectrum...(Fig. 2.1) Locality: Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great...gas deposit Rehden, near Deapholz, Lower Saxony, Germany (type locality). Description: Colourless crystals...Müntzer pit, Bischofferode, near Ohmberg, Thuringia, Germany. Kind of sample preparation and/or method of registration |  | Grapes, Rodney, Sokol, Ella, Kokh, Svetlana, Kozmenko, Olga, Fishman, Ilia (2013) Petrogenesis of Na-rich paralava formed by methane flares associated with mud volcanism, Altyn-Emel National Park, Kazakhstan. Contributions to Mineralogy and Petrology, 165 (4) 781-803 doi:10.1007/s00410-012-0835-4 | Journal (article/letter/editorial) | | (crystallizing from melt and vapour phase) are tridymite, cristobalite, chlorapatite, alkali feldspar, pyrrhotite,...green to black and resembles scoria, lava, or slag. Pale green, vitreous scoria-like paralava is commonly...are filled with soot (12-G-3; Table 1). d Typical scoria-like paralava (A-10-1; Table 1) usually found at...abundant medium-sized pores and low structures A-6. Scoria-like dark paralava with carbon-lined small pores;...surface. From centre of a methane fire loci 28-G-5. Scoria-like dark paralava with small pores and aggregates |  | | Journal (issue) | | San Benito County, Death Valley, and Crestmore Quarry. While living in Sacramento, he exhibited his minerals...and for fayalite in the article on Henderson's Quarry, New Zealand (VoL VII, #7, page 21) lt is curious...crystals can be found in scoria (Henderson's Quarry) or in the cristobalite spheres that are the first...microminerals that you are looking for occur in the porous scoria. I found the be!->t material at the foot of the...occurrences have been added, including Eifel, Germany and Lake Rotorua, New Zealand3 . During the 1980's |  | | Journal (article/letter/editorial) | | dacitic ash and pumice, grading up into basaltic scoria (Lipman, 1967; Watanabe, 1978; Hunter, 1993). ...(Akai and Omine) consisting of andesitic lava and scoria deposits (not shown as separate units on Fig. 1b)...caldera (Ono et al., 1981). It consists of a small scoria cone and a pyroxene-phyric andesite lava flow covering... black augite ± hypersthene basalt to andesite scoria deposit, containing fragments of poorly vesiculated...welded augite–hypersthene ± hornblende andesite scoria and pumice flow deposit (pumice clasts Ζ5 cm), |  | | Journal (article/letter/editorial) | | referred to as paroxysms) during which the fallout of scoria bombs, crystal-poor pumice (shoshonitic basalt)...B3 ejecta fragments partially coated by basaltic scoria; the scale (upper right) is 8 cm long. Scanning...(5^30 cm in size) of weakly to strongly altered scoria and lava, often with a powdery surface and oxidized...cordierites from Bokaro (India) and Blaue Kuppe (Germany) paralavas (Daniels et al., 1992). No difference...mullite^plagioclase palisade facies and the basaltic scoria (outside the upper portion of the image) coating |  | | Journal (article/letter/editorial) | | C is B2-tridymite. Above this temperature B-cristobalite is stable to its melting temperature at 17l3o*50...mineral in turn also has a low temperatureform, a-cristobalite;the inversion temperature rangesbetween 22A"...castsremaining. Fenner discoveredin 1914 in the Francisco quarry at Great Notch a small number of babingtonite crystals...study of the specimens of loess, terra cocida, and scoria collected by the Hrdlicka-Willis Expedition (with |  | | Journal (issue) | | Point Arena, California were the minerals from a quarry at Summit Rock, j ust north of Crater Lake National...domes is commonly preceded by the formation of a scoria cone, followed by the lava filling the crater and...The suite consists of aegirine, plagioclase, cristobalite, tridymite, hematite, pseudobroolcite, fluorapatite...associated with pseudobrookite, hematite, albite and cristobalite. Microprobe analyses show that two end members...distinctly reddish, and the luster submetallic. CRISTOBALITE- Spatse but present throughout cavities with |  | | Report (issue) | | anorthite-olivine-phyric basalt lava flows alternating with scoria layers, is extinct and ice-capped. The northern...Island is a young volcanic centre, consisting of a scoria cone rising to 229 m. above sea-level, surrounded...Candlemas Island . I. Lucifer Hill 2. The south-west scoria conelet 3. Lava flows a. Pale flow-banded lavas...South lava flow f. North lava field 4. Ash and scoria deposits on the lava flows V. Volcanic history...Plagioclase . b. Clinopyroxene c. Olivine d. Cristobalite . 4. Vitrophyric lava flow of the west peninsula |  | | Journal (article/letter/editorial) | | Quartz features occasionally in the andesites and cristobalite is a frequent groundmass constituent. Coarse-grained...of some of the flows (e.g. 14480 and 14446). Cristobalite has been recognised in the groundmass of the...consists of plagioclase, hypersthene, magnetite and cristobalite, with clinopyroxene appearing only as occasional...rounded olivines. A patch of dark interstitial scoria occurs in the centre of the field and a network...intermittent, films along crystal boundaries. The scoria contains microlites of strongly zoned plagioclase |  | Torró, Lisard, Martin, Robert F., Schumann, Dirk, Cox, Julia, Galí Medina, Salvador, Melgarejo Draper, Joan Carles (2018) The incipient flash melting of scapolite and plagioclase megacrysts in alkali basalts of the Olot suite, Catalunya, Spain, and at Chuquet Genestoux, Puy-de-Dôme, France. European Journal of Mineralogy, 30 (1) 45-59 doi:10.1127/ejm/2017/0029-2682 | Journal (article/letter/editorial) | | Cenozoic volcanic suites in the Laacher See area of Germany and in the Atakor area of the Hoggar, in southern...including the Rhenish massif and Rhine graben of Germany, the Massif Central of France, and the Valencia...(1932) focused on feldspar megacrysts in basaltic scoria. Out of fifteen transparent megacrystic specimens...number of megacrysts encountered in the basaltic scoria. They are generally roundish in outline, up to...sieve-textured labradorite (Fig. 7). Also present in scoria at the Roca Negra and Pomareda volcanos are rare |  | | Journal (article/letter/editorial) | | Keywords: fulgurite, blue glass, immiscible melt, cristobalite ACCEPTED MANUSCRIPT 1. Introduction Coloration...examples of natural glasses are obsidian, pumice, scoria, and tachylite from volcanic sources. Generally...determined AC through Raman analysis to be cristobalite (SiO2). Furthermore, blackened material was...source of the discharge). The presence of RI cristobalite supports a longer formation timescale than typical...by lightning, as the conversion of quartz to cristobalite requires elevated temperatures that persist |
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