 | | Journal (article/letter/editorial) | | crystalline rocks of the Upper Harz Mountains, Germany By ALBRECHT BAUMANN, BORW1N GRAUERT, Miinster,...metasedimentary rocks of about 1 . 6 G a or older. The lower intercept indicates a possible metamorphic event...Mountains. Emplacement of the intrusions of the Harzburg gabbronorite and the Brocken and Oker granites...the Ecker gneiss block, now squeezed in between Harzburg gabbronorite and Brocken granite, was connected...place des intrusions du massif gabbronoritique du Harzburg et celle des granite de Brocken et d'Ocker ont |  | | Journal (article/letter/editorial) | | wollastonite, 649; lithian tourmaline, 747 Newhurst quarry, Shepshed, Leicestershire, vesigni6ite, 533 Cornwall...* Confluence of Carneal Water and Clenoe Water Germany (Deutschland) Bramburg, G6ttingen, tacharanite...Breitenbrunn ( ~ Breitenhof), Saxony, helvine, 627 Schwarzenberg, Saxony, belvine, 627 ~gi~ (~l~jquO...glauconite, 753 SCOTLAND France Auchinstarry quarry, Kil~yth, Stirlingshire, julgoldite, 761 Blackcraig... 59 Portsoy, Banffshire, migmatites, 66r Ratho quarry, Edinburgh, julgoldite, 761 Champagnac, Cantal |  | | Book | | look for. Michael O’Donoghue Proustite (East Germany) 7 Rocks We can define a rock as a large mineral...Darker and even poorer in silica than diorite is gabbro, containing a calcium-rich plagioclase and pyroxene...Granite Nepheline syenite Syenite Dio rite Gabbro Peridotite 13 Dunite Serpentinite Rhyolite...the fixed index (the ordinary ray) at a higher or lower reading than the moveable (extraordinary) ray. Where...incident beam are retarded by passing through to the lower side of the film, rejoining the main beam either |  | | Book (edition) | | (trilithionite-polylithionite), olivine (forsterite-fayalite), and wolframite (ferberitehiibnerite). The members...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....Scbwarzwald Mts., in the Sailauf quarry, Spessart Mts., Bavaria. both Germany, and from the Rabejac deposit... = = = = = Acanthite, x 16 mm, Freiberg, Germany, H Abernathyite, 12 mm, Ririera/, France, H Abhurite...at the Himmelsftirst mine, Freiberg, both Saxony, Germany. In the subtropical areas acanthite may occur |  | | Book | | periods of stability PLANET | 114 San Carlos district, Chihuahua, Mexico * 8 x 4 x 2 om are uncommon...manganese oxide on limestone, Solnhofen, Bavaria, Germany * 11.5 x 24x 0.5 cm Murcia, Spain * 14x 11x 5...such as Porcupine and Hemlo districts; Noranda district, Quebec. USA: Mother Lode belt and others in...Localities Canada: Cobalt mining district and Thunder Bay District, Ontario. USA: several localities... Wire silver, Silver Islet Mine, Thunder Bay District, Ontario, Canada + 11.5 x 14x 11 om Silver has | | | Book | | A CHANGING PLANET 11 Vanadinite, San Carlos district, Chihuahua, Mexico * 8 x 4 x 2 cm Mineral Species...manganese oxide on limestone, Solnhofen, Bavaria, Germany * 11.5 x 24 x 0.5 om MINERALS: PRODUCTS OF A...such as Porcupine and Hemlo districts; Noranda district, Quebec. USA: Mother Lode belt and others in...Localities Canada: Cobalt mining district and Thunder Bay District, Ontario. USA: several localities... Wire silver, Silver Islet Mine, Thunder Bay District, Ontario, Canada * 11.5 x 14x 11 om Silver has |  | | Journal (article/letter/editorial) | | Ferruginous Hornfels from Riekensgliick, Harz Mountains, Germany K. A b r a h a m and W. Schreyer Institut ffir...ffir Mineralogie, Ruhr-Universit~t Bochum, Germany Received April 9, 1973 Abstract. T h e hornfels first...assemblage olivine-cordierite-spinel, and a subsequent, lower-temperature stage 2, in which the additional phases...Brocken massif in the Harz Mountains of Central Germany. The minerals formed in the hornielses under the...granitic magmas include according to R a m d o h r fayalite, cordierite, spinel, magnetite, garnet, gedrite |  | | Journal (issue) | | They collected at many locations in the Willamette Valley, central and eastern Oregon, southern Washington...a member of the Sacramento Mineral Society, the Valley Rock Rustlers, and the ElDorado County Gem and...locations as San Benito County, Death Valley, and Crestmore Quarry. While living in Sacramento, he exhibited...end-members of the series: Forsterite, Mg2Si0 4 , and Fayalite, Fe2 Si04 . The name Hortonolite was formerly...Ca. Olivine forms a continuous series between fayalite and forsterite. with all percentages ofMg and |  | | Journal (article/letter/editorial) | | 13. On INCLUSIONS of TERTIAR~ GRA~WlT~. in the GABBRO of the CUIL]~IN HILLS, ~]cye ; and on the PR0])UCTS...Quartz-felsite Fragments by the Basalt of the Ascherhiibel, Saxony .................................................General Characters of the Granite-inclusions in the Gabbro .................................................BASALTOF AS0n~HOBEL, SxXO~Y..: The geologists of Saxony have long been acquainted with a remarkable case...GriUenburg. This locality is in the kingdom of Saxony, and is nearly equidistant, from Freiberg and Tharandt |  | | Book | | called pegmatitic segregations and can occur in gabbro, As well-shaped crystals. This is because they...Granite and syenite are light in colour, diorite and gabbro dark, and peridotite black or dark green. In some...phenocrysts extrusive rocks. Granite, syenite, diorite, gabbro, which the minerals form much they size; coarse-grained...intrusions and medium- to finegrained Hornblende gabbro other larger crystals, are the same as those...are taken into solution and carried down to lower levels, hydrothermal deposits losing their sulphides |  | | Journal (article/letter/editorial) | | are p r i n t e d in SMALL CAPITALS, Subjects in lower-case r o m a n , a n d localities in italics. The...ATKtN (D.), see LIVINGSTONE(A.), 441 Auchinstarry quarry, Kilsyth, Scotland, julgoldite, 76I Avondale, Auckland...layered gabbro, 7o3 Bramburg, Germany, tacharanite, I 13 Breitenbrumm ( - Breitenhof), Germany, helvine...relationship to sulphohalite, 13 t 924 ALPHABETICAL Fayalite, hydrothermal, Transvaal, anal., opt., X-ray,...Lukmanier, Switzerland, aluminian hornblende, 3o8 Gabbro, kaersutite-bearing, East Greenland, petr., anal |  | | Journal (article/letter/editorial) | | Feo hortonolite (Mgo as,Feoas,Mnoor,Caoor), and fayalite (Feo gz,Mgoor,Mns ,r). The closeness in value...describeda similar two-dimensionalanalysisof a fayalite crystal. A preliminary description of the present...the Fe-content increased, the oxygen atoms in fayalite more nearly approach the ideal configuration of...from a wide dike at camas M6r, Muck, scotland and fayalite in lithophysae from Obsidian Clifi, Yellowstone...homogeneous forsterite' the hortonolite from an olivine gabbro dike in camas M6r, Muck, Scotland was found to |  | | Journal (article/letter/editorial) | | Ladysmith (Rosemeyer 1999, the Vulcan Materials quarry in Racine (Scovil 1994), the pegmatites of Florence...marcasite. A major mining district, the Upper Mississippi Valley zinc-lead district, was in these rocks in...and copper minerals were found. Mining in this district ceased in the late 1970s. A branch of the Middle...may have omitted. Adams County Hamilton Mound. A quarry is located in the NE 1/4 sec. 36 T*20N*R.6E.: potassium...hornfels at the contact with the Mellen gabbro complex: apatite, fayalite, ferroaugite, grunen'te, orthopyroxene |  | | Report (issue) | | ... , .................................. . The Lower-Middle Huronian series ................. . The slate...series ............................... . The Duluth gabbro .................. : ......... . Contact metamorphism...formation ....... . Lower cherty beds .................................... . Lower slaty beds ..........1. General geologic map of the eastern Mesabi district .................................. in pocket II...Biwabik iron formation, resting on the granite B. The lower cherty beds showing a structure like piles of inverted |  | | Book | | results in a pseudo-symmetry, i.e. crystals of lower symmetry are twinned in such a way that they form...between that of the sample and that of the next lower grade. In this case we consider the hardness to...Different scratch hardness on kyanite 20 somewhere lower grade adding a half-grade to it. Although the determination...fibrous and porous aggregates often seem to have a lower hardness because of the blank spaces between individual...identification. Nobody should be discouraged by initial bad luck, it is sometimes difficult even for an expert |  | | Book | | Tubingen Germany and c. Schmitt-Riegraf Lecturer in Mineralogy University of Munster Germany Translated...Chapman & Hall GmbH, Pappelallee 3, 69469 Weinheim, Germany Chapman & Hall USA, 115 Fifth Avenue, New York...Verlag, P.O. Box 30 03 66, D-70443 Stuttgart, Germany Softcover reprint of the hardcover 2nd edition...Schwabische Alb and in the Laacher volcanic areas of Germany. 2. We give emphasis to the common minerals. They...opposite is the case if the investigated mineral has a lower refractive index than the material it is surrounded |  | | Book | | Binding: Lüderitz & Bauer, Berlin. Printed in Germany. Dedicated to my former teacher and friend Professor...Grigoriev (U.S.S.R) Prof. Dr. F.K. Drescher-Kaden (Germany) Mr. D. Minatidis (Canada) Dr. E. Mposkos (Athens)... Dr. Thesis, University of Frankfurt am Main, Germany. Fig. 551, by Wager and Deer from Theoretical Petrology...crystalloblasts, the Australian occurrence also shows a high fayalite content, from 13 % to 25%. However, it should...been observed in Hadabudussa/GariBoro area (Adola district, S. Ethiopia). Fig. 187 shows amphibolite with |  | | Journal (article/letter/editorial) | | layered. gabbro intrusion which shows continuous crystallisation-differentiation from a lower and earlier...earlier hypersthene-olivine-gabbro to an upper and later fayalite-quartz-gabbro. Two of the three main constituents...middle of the layered series. The olivines in the lower and earlier part of the layered.series,of which...the later minerals to crystallise, while in the lower and earlier rocks of the intrusion the more magnesian...close.There is also close agreement, except at the fayalite end, with the refractive a Tutton, A. E. H., Crystallography |  | | Journal (article/letter/editorial) | | aurichalcite, rosasite, 441 WALES Bwlch y Ddeufan, Conway valley: pumpellyite, 1093 Drws-y-Nant, Dolgelly: apatite...Belhelvie: hornfels, hypersthene, 903 Coire Dubh, Rhum: gabbro, felsite, 887 Marsco, Skye: ferrodiorite, ferrohortonolite... 563 A ntrim Black Burn, Carnlough; Glenariff valley; GIenarm, Kilwanghter Castle; Langford Lodge borehole;... apophyllite, gyrolite, 173 BaUyclare; Bruslee quarry, Ballyclare; Call Hill farm, Cookstown Junction... Belfast; Glenoe; Kilwanghter Castle; Nelson's quarry, BaUyhenry; Shane' s Hill, Larne; Skerrywhirry |  | | Book (edition) | | shonkinite Trachyte Monzonite and diorite Andesite Gabbro, anorthosite and diabase Basalt Perknite References...(nON-FELDSPATHOIDAI.) ROCKS AND GENESIS —OCCURRENCE Olivine-gabbro and peridotite Peridotite and serpentine Kimberlite...to Daly's hypothesis Carbonatites The foyaite-gabbro Xlll association Daly's hypothesis, conclusion...Diorite and anorthosite G. Andesite H. Gabbro and soda-gabbro 403 406 409 414 417 419 A.- Mineraloi^y... 7. 8. 9. batholith, Siliceous inclusion in gabbro, . Map Map of the Querigut granite, Pyrenees |  | | Book | | 23 epsomite 60 erubescite 10 falcon’s eye 31 fayalite 75 feldspars 111 feldspathoid group 108 ferrierite...found in igneous rocks rich in magnesium and gabbro granules and and poor in silica, such as peridotite...brownish black, at Freiberg and Andreasberg in Germany, and also in the United States (Arizona). Antimony...found at Butte, Montana, and the Copper River district of Alaska. A much rarer mineral is covellite,...Switzerland. Good crystals I occur at Freiberg in Saxony, Cavnic in Romania, Schwaz in the Tyrol (Austria) |  | | | | euxenite 36, 36 falcon’s eye 31 fassaite 97, 98 fayalite 75 feldspars 111 feldspathoid group 108 ferrierite...rocks rich in magnesium and poor in silica, such as gabbro and peridotite. It is normally found in granules...brownish black, at Freiberg and Andreasberg in Germany, and also in the United States (Arizona). Antimony...found at Butte, Montana, and the Copper River district of Alaska. A much rarer mineral is covellite,...found in crystals if occur at Freiberg in Saxony, Cavnic in Romania, Schwaz in the Tyrol (Austria) |  | | Report (issue) | | obtaining permission to use tracks and to examine quarry and other sections rests 011 the user of the Guide...amongst which hornblende-biotite. hcdenberi;ite-fayalite, and riebcckite bearing varieties occur. Other...the composite basic-acid sills of the Broad ford district; the volcanic vents of Kilchrist and other areas;...Cambra-Ordovician sil iceous dolomites of the Kilchr'ist district (Til ley, 1951). A list of references to work...-horclinc outcrops of Lower Jurassic sediments. These arc 1 he Oroadford Beds of Lower Lias age, chicOy of |  | | Journal (article/letter/editorial) | | Geowissenschaften und Rohstoffe, Hannover, Federal Republic of Germany Textural Features and Chemical Characteristics...June 24, 1981; accepted July 20,1981 Summary The lower ultramafic part of the Chalkidiki Ophiolite Complex...1). Lithologically, this complex consists of a lower layered sequence of dunite and harzburgite, which...between 20 and 60 m, occurs between the upper and lower banded dunite of each cyclic unit. The order of...9 massive chromite i chromlteln +access~ harzburg,te X 30- ~Y O4 7~ ,o ho O 20- J + o oo |  | | Journal (article/letter/editorial) | | Schneebergite and nickelschneebergite from Schneeberg, Saxony, Germany: the first Bi-bearing members of the tsumcorite...Metamict aeschynite-(Y) from the Evje-Iveland district (Norway): heat-induced recrystallization and dehydrogenation...mantle component in the origins of the Hercynian gabbro-granite series of the “Serie dei Laghi” (Southern...Pb6Sb6S14(S3), a new mineral from the Ceragiola marble quarry..................................................SHARYGIN, V. KALUGIN, N. VOLKOVA, E. NIGMATULINA .– Fayalite and kirschsteinite solid solutions in melt from |
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