 | | Journal (issue) | | after the contact deposits ( He meant the replacement de posits ) are exhausted ." In 1885 Emmons said : ...there is no apparent connection between the vein de scribed here and the replacement deposits is an unfortunate...intrusions , but this source is believed to have been of de cidedly minor importance. COLORADO SCHOOL OF MINES...appearance, they are decidedly tabular parallel to the brachy- pinacoid and are typical in COLORADO SCHOOL...blunt macro -dome with a steeper macro -dome and a brachy-dome as occasional, inconspicuous additional forms |  | | Journal (article/letter/editorial) | | blunt macro-dome with a steepermacro-domeand a brachy-domeas occasional,inconspicuousadditional forms...terminationof the rarer habit consistsof a very prominent brachy-.domeand a lessevidentmacro-dome. A secondbrachy-domeis...display a blunt-angledprism and a vertically striated brachy-pinacold; and a second,inconspicuous prism is not...fifteen per cent zinc) yielded a RECENT o o o o DE•/ELOPMENTS .4T LE.4D•/ILLE. I3 G. MONTAGUE ...containedfifty-five per cent manganese) or rhodochrosite accordingto the appearance. This data is given |  | | Book | | teinsbiidenden Mineralien," Brush and Penfield's De- but have also consulted " Mineralogy," and Miers'...the vertical, the shorter of the two laterals brachy-axis or br achy -diagonal, a) is (the directed...distance cut off on the vertical, the macro- and the brachy-axes. Thus, besides the fundamental series, we...of pyramids, a brachy series series being limited by the corresponding prism, brachy- or macro-prism... in fact, the lateral limiting forms of the brachy and macro series of pyramids respectively, just |  | | Book (volume) | | 342 Group 245 and 336. 341 Talc Nitratine De- mantoid, Uvarovite) Staurolite, 335 Glinochlore...therefore one is second rhombohedron may letter brachy-axis, or Fig. are to the r the Rhombic...of were scalenohedron: consequently denoted brachy-diagonal system the related one dioptase,...called one the horizontal cut and brachy- to the brachy-pinacoid, faces axes base, the a ...axis b P∞, are infinite the faces vertical brachy-dome, a or ∞P2, ∞P, horizontal or a four |  | Dasgupta, Somnath, Banerjee, H., Fukuoka, M., Bhattacharya, P.K., Roy, Supriya (1990) Petrogenesis of metemorphosed manganese deposits and the nature of the precursor sediments. Ore Geology Reviews, 5 (4) 359-384 doi:10.1016/0169-1368(90)90039-p | Journal (article/letter/editorial) | | (ii) agrees with the composition of normal braunite (De Villers, 1975; Moore and Araki, 1976) and the subscripts...bixbyite and hollandite, but contain minor rhodochrosite (Tables i and 2 ). The type IIA assemblages... Phase chemistry and element partitioning Rhodochrosite and quartz coexist in these assemblages only...In these assemblages, the modal abundance of rhodochrosite or kutnahorite varies widely. Huebner (1967)...growth of stumpy hausmannite and braunite from rhodochrosite in Californian deposits. Jacobsite-hausmannite(i) |  | | Book (edition) | | drusy in length and most common are pyramid and brachy- dome, a few other faces being sometimes observed... is Fig. a), in stibnite crystals, Mechanical de- some are bent or distorted and some broken and...cube. one pyrites, in Pyrites occurs with rhodochrosite, Kaga Kuratani, galena and chalcopyrite at...frequently met with. Striations parallel to the brachy-axis are usually observed on u, and are especially...cavities of quartzosc This feathery galena and rhodochrosite. Pr., with associated veins, it sometimes |  | | Book (volume) | | rocks. or slaggy mud a be to Vaal with De crater-lakes they at funnel-shaped high pressure... of The “Excelsior” diamond. Actual size. “De the the 428 1/2 carats, latter being a regularly...unaided Beer’s tons gram Pretoria near 3025 3/4 De Stones of carats The mine by surface greasy...about at the Mines, diamonds valued of whole De leave RELATED whites”. Since in so-called a...of product of iron be special a account France, Neuhausen at 60%, electrolysis, the fire-brick |  | | Book (edition) | | Physical Mineralogy; III. Chemical Mineralogy; IV. De¬ scriptive Mineralogy; V. Determinative Mineralogy...horizontal axes is taken as the a axis and is called the brachy-ams.The decision as to which of the three axes...intersects the b and c axes and is parallel to the a or brachy-axis. There are various brachydomes with different...intersects the b axis and is parallel to the a (brachy) and the c axes. It is represented in Fig. 153...macro-axis, while the shorter is called a or the brachy-axis. The relative lengths of the three axes and |  | | Book (edition) | | the b and c axes and is parallel 4. to the a or brachy-axis. different axial intercepts. have for its...each of which intersects the b axis and is a (brachy) and the c represented in Fig. 150 parallel to...relative lengths of the three called a or the brachy-axis. axes and the angles which they make with...upper end of air of the tube. Its presence can be de- tected by its pungent and irritating odor. A piece...The principal mines are the Kimberly, Du Toitspan, De Beers and Bultfontein, near Kimberly, the Jagersfontein |  | | Book (edition) | | agerssm eee Weert ele A ps Veta * c* hte be ai}De holt i 68Ore & 6 Oe ie 7alheas S08 oy o/s . semjelee...appear until 1546, when Georg Agricola published his De Natura Fossilium. It is commonly conceded that Werner...crystal. Fie. 8. Quartz crystals. Dauphiné, France. Crystalline and Amorphous Substances. Most solid...tetrahedrite. Fig. 105. Fia. DYAKISDODECAHEDRAL De Elements of Symmetry, =e 3. 106. CLASS! The elements...Figures 206 to 209; m = (a:a: c), {110}; p = (a:a:0), i de a= (a: a: wc), {100}; 2% = (a: 3a: 3c), {311}. These |  | | Book (edition) | | Aragonite, Cerusite Chessylite, Malachite Rhodochrosite, Chalybite, ..... Cerusite 19. 116 122...cuprouranite (24, 3) in flat square plates with a large de- velopment of the basal pinacoid. Combinations of...rhombohedra are shown by the minerals and 3), rhodochrosite (17, and in 3), chalybite (5, 3), and chabazite...mineral, and this will be of great assistance in de- fluid, shall, termining the kind of mineral....crystalline structure of the material possesses the same de- gree of symmetry as the external form of the crystal |  | | Book (edition) | | CRYSTALLOGRAPHY aI axis for the longer of the two and the brachy axis for the shorter. There are three planes of...of the orthorhombic system. Top left: the macro, brachy and basal pimacoids. Top right: prism and basal...hemiorthodome (orthoclase). axes are called the macro and brachy as in the rhombic system. The form may be recalled...—Crystals of the triclinic system. Top left: macro, brachy and basal pinacoids. Top right: basal pinacoid...left: quarter prisms. Bottom right: hemi-prisms, brachy pinacoid, basal pinacoid and the hemi-macrodome |  | | Book (edition) | | appear until 1546, when Georg Agricola published his De Natura Fossilium. It is commonly conceded that Werner...Calcite. Joplin, FIG. 8. Quartz. Dauphine, France. Missouri. When minerals occur with definite...each cutting the axes at their of the modified brachy- and Also termed the anorthic, asymmetric or clinorhomboidal...their usual number of faces and by the terms basal, brachy-, and macro- are designated, as heretofore, MINERALOGY...two readings and a simple division are necessary to de- the round tube scale with it. termine the specific |  | | Book (volume) | | LibraiPie Jacques LECHEVAIIER 12 Kue de Toumon PARIS VI BIBLIOTHEEK 7 7496 00027427 2 NATIONAAL NATUURHlSTOftlSCH... MINERALOGIE DE LA FRANCE MACON PROTAT FRERES, IMPRIMEURS y/> LACROIX A. Membre de rinslitui...Professeur de Minéralogie au Muséum d’histoire naturelle MINÉRALOGIE DE LA FRANCE ET DE SES COLONIES...CHIMIQUE DES MINÉRAUX: ÉTUDE DES CONDITIONS GÉOLOGIQUES DE LEURS GISEMENTS TOME TROISIÈME PARIS librairie...ÉDITEUR SUCCESSEUU DE UAÜURY ET 15, MAISON A C‘* RDE DES SAINTS-PÈRES, 15 I.IÈGE, RUE DE LA 1901-1909 |  | | Book (edition) | | des cas oil le mineralogiste ne peut se dispenser de dire au chimiste : Apprenez-moi « que reus venez...regulating the forms of crystals. A century later KomtS de l'lsle laid the foundations of crystallography by...faces of the other figures. In the language of Rome' de l'lsle the predominant faces are those of the primitive...Fig. 34. Fig. sa. Six-faced Octahedron. Fig. 85. de l'lsle and by Haiiy. The cube and its six derived...then distinguished as the vertical axis (c), the brachy-diagonal or short axis (a), and the macro-diagonal |  | | Book (edition) | | method may sometimes be found convenient for the de- tection of calcium in phosphates: Dissolve an ivory...charcoal, a curious odor may be observed which is de- scribed by Berzelius as similar to that of radishes...of the axes, or their ratio to one another, can be de- For example, sulphur crystals have the form of...striated and the inclinations therefore not accurately de are termined. HEXAGONAL SYSTEM. The forms in ...is Each of the ^macro- and brachyparallel to the brachy-axis a. domes has four similar faces. Domes are |  | | Book (edition) | | 92 96 . . . 110 Calcite Calamine, Rhodochrosite, Chalybite, 112 Cerussite SULPHATES 20...minerals calcite (Plate 16, Figs. 2 and 3), rhodochrosite (17, 3), chalybite (5, 3), and chabazite (36...Manganese Manganite, Pyrolusite, Psilomelane, Rhodochrosite. : : : Nickel: Niccolite. CLASSIFICATION...towards the margins of the rock-mass, forming workable de- rocks, posits of ore. It is also found in...in Fig. 2 is from Fontainebleau, of iron-ore. in France crystals large ; the closely aggregated groups |  | | Book (edition) | | until 15.J:6, 1Yhen Georg .\.~ric-ola published his De 1\'atura Possili11m. I t is c.-ontFig. l. Ahraham...orderly internal structure (Fig. 5). '\1Vhen sohds are de\-oicl of 1.tn orderly internal arrn,ngemcnt of atoms...Joplin, _:\ [issouri. Fig. 8. Quartz crystals. France. Dauphine, In crystalline substances the various...or a axes ha,·e t,yofold sy1nn1etry ,yith a polar de,·elopn1ent. 'I'he sy1nn1etry relations are giYeu...are parallel to the a. or brachyaxis are called brachy- or side domes. Their general symbols are ( c: |  | | Book (edition) | | cerattveenishe tut een INAML YH SULSUMING SUMETDIT by ee De cSeeigehoy evsoptsGresenst hae Sains Ae OS nee...horizontal axes is taken as the @ axis and is called the brachy-axis. The decision as to which of the three axes...intersects the b axis and is parallel to the a (brachy) and the c axes (Figs. 162 and 164). 50 CRYSTALLOGRAPHY...determined respectively by the intersections of the brachy- and macropinacoids with a pinacoid. The b (macro-)...be longer than the Triclinic Axes. the basal (brachy-) 58 CRYSTALLOGRAPHY axis. The relative lengths |  | | Book (edition) | | 39:5 pp., Svo. Stuttgart, 1876. Mallard. Traite de Cristallographie geomctrique et physique, vol. i...Leipzig. Commenced 1876. Bulletin de la Societe Mineralogique de France. Commenced 1878. : : , ; ; ...(i-i) In f. 26 the plane (i-i) parallel to the brachy diagonal the brachypinacoid. parallel the to orthodiagonal...includes the planes parallel to the vertical and brachy diagonal axes (G and 0), called the brachypinacoids...The prisms of the general form i-n, are called brachy diagonal prisms. The prisms i-n bevel the front | | | Book (edition) | | the ideally developed c1:ystal would be like and so de�errnining its symmetry. It is to be noted that the...horizontal axes is taken as the a axis and is called the brachy-axis. The decision as to which of the three a.xes...intersects the b axis and is parallel to the a (brachy) and the c axes (Figs. 162 and 164). I I I I I...determined respectively by the intersections of the brachy- and macropinaeoids with the basal pinacoid. The...The b (macro-) a>brachy-) 58 CRYSTALLOGRAPHY axis. The relative lengths |  | | Book | | Geografico de Agostini, Novara, except those on the following pages: 12 (centre right) De Beers. 14 (top...Publishing Limited, London and Istituto Geografico de Agostini, S. p. A., Novara 1976, 1982 All rights...silver mines at Ste. Marie-aux-Mines in Alsace, France, and from Fukui Prefecture, Japan, where globular...minerals, at Lake Athabasca, Saskatchewan; from Sierra de Umango, La Rioja, Argentina; Harz Mountains, Germany;...From Lauta, Germany; Ste. Marie-aux-Mines, Alsace, France. Bornite Cu5FeS4 Bornite crystallizes in the cubic |  | | Book (edition) | | 220 233 235 IN MINERALS Basic Compounps: AcIDS De WW PRP Oo DD omont . CLASSIFICATION OF THE BY ...T'raité de Minéralogie (1801) 1—* S’il est des cas ot le minéralogiste ne peut se dispenser de dire au...occurs in the form of a hexagonal prism terminated De SPT Fig. 5.—Quartz. Ae a ed ee ae Fig. 6.—Fluor-spar...regulating the forms of crystals. A century later Romé de l’Isle laid the foundations of crystallography by...faces of the other figures. In the language of Romé de l’Isle the predominant faces are those of the primitive-figure |  | | Book (edition) | | Leipsic. 1877, Cours de Miu6ralogie. Delafosse. 3 vols. Paris, 1862. Trait6 de Miu^ralogie. Dufrenoy...Second edition. 1822. The Bulletin de la Soci6t6 Min^ralogique de France. Zeitschrift fUr Krystallographie...Dioscor. (Diosc), Pedanius Dioscorides. Dolom., D. de Dolomieu. Aldrov., Ulyssus Aldrovandus. Domey....Boulanger. Gean., Conradi Gesner. Bourn., Comte de Bournon. Gerh., C. A. Gerhard. Glock., E.F. Glocker...Brewst, Sir David Brewster. Broch.f A. J. M. Brochante de Villiers. Brong., A. Brongniart. Briiok., Urban F |  | | Book (edition) | | Introduction that had sprung up around the site of the De Beers farm was formally named Kimberley after the...company, De Beers Consolidated Mines Ltd, was incorporated in 1888. The name was taken from the De Beers...Garden laboratory. This equipment, brought over from France, made it possible to test over 200 pearls an hour...synthesis of diamond grit in 1955. Four years later, the De Beers Diamond Research Laboratories in Johannesburg...industrial synthetic diamond grits. (Courtesy of De Beers) A brown gemstone from Sri Lanka, formerly |
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