 | Oberti, Roberta, Boiocchi, Massimo, Hawthorne, Frank C., Ball, Neil A., Blass, Günter (2017) Ferri-obertiite from the Rothenberg quarry, Eifel volcanic complex, Germany: mineral data and crystal chemistry of a new amphibole end-member. Mineralogical Magazine, 81 (3) 641-651 doi:10.1180/minmag.2016.080.117 | Journal (article/letter/editorial) | | Ferri-obertiite from the Rothenberg quarry, Eifel volcanic complex, Germany: mineral data and crystal chemistry...Merzbachstrasse 6, 52246 Eschweiler-St-Joris, Germany [Received 24 November 2015; Accepted 11 May 2016;...vein found from a basalt quarry at Mount Rothenberg, Eifel district, Germany. Associated minerals are...occurrence after the Caspar quarry at Bellerberg volcano, Eifel region), tridymite, rutile, roedderite and...crystal-structure refinement, Eifel district, Germany. Introduction THE name obertiite, presently assigned |  | | Report (issue) | | Rothenberg Volcano, Eifel complex, Rhineland-Palatinate, Germany. 2.704 (100), 3.116, (76), 3.388 (72)...Rothenberg Volcano, Eifel complex, Rhineland-Palatinate, Germany; average of 10 electron microprobe analyses...From vesicles in silicate veins within basaltic scoria. Mineral Group: Amphibole supergroup, oxo-amphibole...α-quartz paramorphic after β-quartz, eifelite, tridymite, rutile, roedderite. Distribution: From the Rothenberg...Rothenberg Volcano, Eifel complex, Rhineland-Palatinate, Germany. Name: For an oxo-amphibole with Fe3+ |  | | 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 |  | | Journal (article/letter/editorial) | | München, Museum “Reich der Kristalle,” Munich, Germany. Yu.U. Kayrobertsonite* S.J. Mills, I.E. Grey...Süd pegmatite, Hagendorf, Oberpfalz, Bavaria, Germany (49°39′1″N, 12°27′35″E), and the Foote Lithium...rocks (Seruciignimbrites) in association with tridymite, todorokite, magnetite, and hematite. Magnesi...discovered in the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great...area and up to 0.2 mm thick covering the basalt scoria. The crystals are tabular to prismatic, and usually |  | | 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) | | present – enstatite, pseudobrookite, and especially tridymite – indicate that the formation occurred at a relatively...from vapor as the hot lava flowed out over the scoria layer beneath. The presence of both normal and...11-1 110 13-1 1-5-1 Type locality: Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec. ...Gaultite was the last to form. Canada Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec. References:...Bellberg volcano, near Mayen, in the Laacher See volcano area, Eifel, Germany. Structure Crystal System: |  | | 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...phase .. Small crystals can be found in scoria (Henderson's Quarry) or in the cristobalite spheres that...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) | | cordierite^plagioclase, mullite^plagioclase palisade and tridymite^clinopyroxene) are recognized among the buchites...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...(2) mullite^plagioclase palisade facies; (3) tridymite^clinopyroxene facies. A simplified sketch of the |  | | 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 |  | | Journal (article/letter/editorial) | | above a coarse red scoria layer. Vesicles in the 10 m thick flow are lined with tridymite and normally contain...this flow, where it came in contact with the lower scoria layer and extra oxygen and other metals diffused...Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, Germany DOI: 10.1127/0077-7757/2010/0164 www.schweizerbart...boulder shows the characteristic contact with the scoria layer that lay beneath it, there are considerable...three minerals: pseudobrookite, enstatite, and tridymite, with ilmenite crystals conspicuously absent. |  | Pekov, Igor V., Yapaskurt, Vasiliy O., Belakovskiy, Dmitry I., Vigasina, Marina F., Zubkova, Natalia V., Sidorov, Evgeny G. (2017) New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. VII. Pharmazincite, KZnAsO4. Mineralogical Magazine, 81 (4) 1001-1008 doi:10.1180/minmag.2016.080.146 | Journal (article/letter/editorial) | | sublimates of the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great...a crystal structure based upon a tetrahedral tridymite-type {ZnAsO4}– framework. It is isostructural...pharmazincite, new mineral, potassium zinc arsenate, tridymite tetrahedral framework, fumarole sublimate, Tolbachik...fumarole located at the apical part of the Second scoria cone of the Northern Breakthrough of the Great...along with tenorite and later aphthitalite, basalt scoria altered by fumarolic gas. 1003 Areas ‘sprinkled’ |  | | Journal (issue) | | FERRIERITE Ferrierite-NH4 Type locality: Libous Quarry, Chomutov District, Usti and Labern Region, Czech...outgassing can generate a froth that solidifies into scoria. Again, vapors present can produce small crystals...3). The matrix material at Obsidian Cliffs is tridymite. In the rocks at Lemolo Lake and Summit Rock,...shows one of the less common, merlinoite, from a quarry on the remains of Mt. Vesuvius. Fig. 8 shows a...in igneous rock is the Eifel region in western Germany. Both interesting minerals and interesting forms |  | | Journal (article/letter/editorial) | | form from this temperature to 1470"+ 10o C is B2-tridymite. Above this temperature B-cristobalite is stable...low temperatureforms of tridymite: a-tridymite stable below 117oand B1-tridymite stable between 1170and...and reversible. The high temperature form, pr-tridymite persistsbetween 1630and 7470"+ 10o at which temperature...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 (article/letter/editorial) | | the most abundant minerals; ilmenite, apatite, tridymite, and magnetite are common; acmite, cristobalite...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...Rock. 1.5X' cavity minerals. Ilmenite, apatite, tridymite, and magnetite are common but not abundant. The...r m u m \ J m m , a v e r a g e- 1 . 5 m m . Tridymite, 1 Thi.n, .tabular, six-sided plates; twinned |  | | Journal (article/letter/editorial) | | Ferri-obertiite from the Rothenberg quarry, Eifel volcanic complex, Germany: Mineral data and crystal chemistry...volcanic complex, Germany. Ferri-obertiite was found in vesicles in silicate veins within a scoria of a basalt...basalt quarry at RothenT berg volcano. Associated minerals include potassic feldspar, α-quartz paramorphic...paramorphic after β-quartz, eifelite, tridymite, rutile, roedderite, and other amphiboles. Crystals of ferri-obertiite...chalcocyanite derivative structure from the Naboko scoria cone of the 2012-2013 fissure eruption at Tolbachik |  | 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,...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 (article/letter/editorial) | | rock similar to those observed in specimens of scoria collected in the field. Thus a temperature range...t h a n z m, a n d others were loose pieces o f scoria scattered m o s t l y within 2 m d o w n s l o...with a Fit. I. Block of dacitic ignimbrite with scoria showing positions of b r o w n - g l a z e d surface...j o i n t b l o c k situated 2"5 m f r o m the scoria. These a n d specimens 7952 a n d 7953, which were...R O D U C E D BY FUSION 783 block bearing the scoria iIlustrated in fig. I, were buff coloured, but |  | | Journal (article/letter/editorial) | | and lies immediately on top of a layer of reddish scoria. Vesicles in the flow are typically a few millimeters...centimeters in size, and are lined with crystals of tridymite, scattered yellow-brown enstatite, and thin blades...at the base of the flow where it contacted the scoria layer, a wider variety of small crystals have been...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 |  | | 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 |  | | Journal (issue) | | 3 Pseudobrookite Twins from the Lemolo Lake Quarry Don Howard and Kent England Pseudobrookite was...the margins of a boulder in the west end of the quarry that was originally collected in 1982 and 1983...boulder shows the characteristic contact with the scoria-like flow beneath it, there are considerable differences...three minerals: enstatite, pseudobrookite, and tridymite, with ilmenite crystals conspicuously absent....the contact where this basalt layer flowed over a scoria layer. The presence of a filiform mineral suggests |  | | 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) | | honeycombed material passing into ' thread-lace scoria.' A person who, arriving at the south-western or...I . figs. 3 & 4). The angles and edges of the tridymite crystals impart a serrated and toothed character...such confluent vesicles being the ' thread-lace scoria' of Prof. Dana2 I f the vapours escape thus completely...into the local sphere of hydrothermal action. Tridymite finally arises, and even the fayalite described...up during fusion into a pumice or ' thread-lace scoria.' (ii) The outermost porcellanous zone of the libhophyses |  | | 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 (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...consists of aegirine, plagioclase, cristobalite, tridymite, hematite, pseudobroolcite, fluorapatite, phlogopite...crystals up to 2 mmacross. TRIDYMITE- More common than cristobalite, tridymite occurs as thin hexagonal-appearing...All crystals are colorless and transparenl Both tridymite and cristobalite represent the ex.cess silica |
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