 | | Journal (article/letter/editorial) | | structure to portions of~/gte. 2, On t]~e PORPHYRYof BELGIUM. By Professor DELESSE, Engineer of Mines, &c. [Communicatedby...tolerably pure specimens, from the quarries of Quenast. They were easily separated from the somewhat darkish...therefore, of this porphyry is oligoelase. This oligoclase, as in all porphyries, is scattered through a...the dark green portions from a fragment of the Quenast porphyry,. I found that their loss by fire was...is general in porphyries; in the variety from Quenast, for instance, it forms a very great number of |  | | Journal (article/letter/editorial) | | orthoclase, phlogopite, serpentine, kyanite, oligoclase, chert. II. CLASSIFICATION OF THE DEPOSITS....Albite, a nor thoclase , kyanite, rnicrocline, oligoclase . Cements and Limonite, leucoxen c, flint, chert...optical character have been identified as albite. Oligoclase. A felspar with a refractive index of 1.54 was...optical character of the mineral point to its being oligoclase. The Heavier Minerals. Garnet, both colourless...extinction. A few fragments of felspar, both oligoclase and microcline, are present. and these also show |  | | Journal (article/letter/editorial) | | Limestone ,, Mixite ,, Newberyite ,, Oligoclase . . . . ,, Ontariolito . . . . ,,... ... lel 6 186 ... mbO . Epidote from Quenast . . . . . . . . . See M a n g s n e s e - e p i...D , Rev. J . Clifton . . . . . . . . . . . . Oligoclase . . . . . . . . . . . . . . . Olivine . . . ...Artifidal Gay-Lmmit Reinite 287 . . . . . . Quenast, Epidote from R~mLaslz~ . . . . . . . . . . |  | | Journal (article/letter/editorial) | | Limestone ,, Mixite ,, Newberyite ,, Oligoclase . . . . ,, Ontariolito . . . . ,,... ... lel 6 186 ... mbO . Epidote from Quenast . . . . . . . . . See M a n g s n e s e - e p i...D , Rev. J . Clifton . . . . . . . . . . . . Oligoclase . . . . . . . . . . . . . . . Olivine . . . ...Artifidal Gay-Lmmit Reinite 287 . . . . . . Quenast, Epidote from R~mLaslz~ . . . . . . . . . . |  | | Journal (article/letter/editorial) | | structure to portions of~/gte. 2, On t]~e PORPHYRYof BELGIUM. By Professor DELESSE, Engineer of Mines, &c. [Communicatedby...tolerably pure specimens, from the quarries of Quenast. They were easily separated from the somewhat darkish...therefore, of this porphyry is oligoelase. This oligoclase, as in all porphyries, is scattered through a |  | | Journal (article/letter/editorial) | | granites consist of quartz, felspar (orthoclase and oligoclase) and mica, which latter mineral is often replaced...unfrequently find plagioclastic felspars, anorthite, oligoclase, and even labradorite, which exhibit no trace...rocks, as for instance in the diorite of Quenast, in Belgium. Iron is abundant in all the igneous rocks...reflected from these that gives the variety of oligoclase known as sunstone, its beautiful opalescence |  | | Report (issue) | | and pegmatized quartz-mica diorite gneiss with oligoclase (specimen D, XXIX, 112, b). Within a few feet...constituents, in descending order of abundance, being oligoclase-albite, quartz, microcUne, and black tourmaline...constituents in descending order of abundance: Oligoclase-albite, quartz, microcline, and very little biotite...the matrix is of quartz, biotite, epidote, and oligoclase-andesine. The dike was originally a porphyritic...in descending order of abundance, of biotite, oligoclase, microcline, quartz, and epidote. This also was |  | | Book | | olivine, with a small amount of plagioelase (oligoclase- andesine) and a little magnetite. Also named...Light-colored aplitic granodiorite, consisting of oligoclase and orthoclase, with minor quartz and biotite...akerite ig. pluton. Syenite containing orthoclase, oligoclase, and often abundant biotite and green clinopyroxene...andesine, although compositions varying from oligoclase to bytownite have been observed; on the basis...diorite in that it consists of sodicplagioclase (oligoclase to calcic-andesine) and one or more mafic minerals |  | | Report (volume) | | been noticed in the granite quarries of Quenast, in Belgium.83 All these observations bring this theory...feldspar (microcline), a white soda-lime feldspar (oligoclase-andesine), smoky quartz, and black mica (biotite)...about equal in amount to the soda-lime feldspar (oligoclase), the quartz is smoky, and the mica is black...and microcline), still less soda-lime feldspar (oligoclase). and a few scales of black mica. The particles...particles are all under 0.1 inch and consist of oligoclase-andesine, smoky amethystine quartz, microcline |  | | Book (volume) | | properly so called, which are named orthoclase, oligoclase, albite, labra- dorite, anorthite, and andesine...and gneiss, though not as a chief constituent. Oligoclase Double silicate of alumina In granite of many... also in syenite of the Vosges. It resembles oligoclase. In basalt and dolerite, in miasIn basalt and...together; orthoclase quartz and mica; orthoclase or oligoclase and hornblende ; labradorite and augite ; but...mica, |Dartmoor, Bodmin Moor, St. Aussometimes oligoclase also. tell, Falmouth, Land’s End, Shap, Eskdale |  | | Book (edition) | | Fig. 4 with Fig. 5 representing a crystal of oligoclase, another one of the triclinic feldspars. The...planes on the two are the same 4. ORTHOCLASE. OLIGOCLASE. with one exception; but there is this difference...90; and in oligoclase and other triclinic feldspars it is 3 to 6 from 90, being in oligoclase 93 50', and...England, in Vieille Montagne in the Liege district, Belgium Derbyshire, Alstonmoor, Mendip Hills, etc.; in...of zinc produced in 1885, in Europe, was, for Belgium and the Rhine, 129,734 long tons Silesia, 79,623 |  | | Book | | crystals of common salt occur in the diorite of Quenast, Belgium. one of these the volume of the liquid was...orthoelase or microcline and The laminae albite or oligoclase. orthoclase, are parallel to the ortho-pinacoid...pyroxenes Enstatite Mica-group Biotite Lepidolite Oligoclase Andesine Labradorite Bronzite Hypensthene..... ... ... 30-63 per cent. 24-33 Quartz Oligoclase ... ... ... ... 41-88 Biotite ... .....labradorite the later microlitic felspars are oligoclase or albite. ; Moreover when these rocks possess |  | | Book (edition) | | these but the two on which ordinarily placed are oligoclase, with soda in hence called soda-lime feldspar... braces those from Ab through Ab8Anj ; oligoclase, Ab6Anj, A HAND BOOK OF ROCKS. through AbjAn...varieties. We would naturally look for ortho- and oligoclase in acidic rocks or those high in silica, basic...Hypersthene Muscovite 1185 Leucite 1300 1350 1400 Oligoclase Labradorite 1120 1125 Olivine Biotite 1130...was at first thought to be albite, and later oligoclase. biotite, See p. 62. Anhedron, a name proposed |  | | Book (edition) | | Diagrams illustrating the Devonian Transgressicm in Belgium Diagrammatic Section through the deposits of the... the Pre-Pliocene Peneplane in England and in Belgium and HcJland The Pliocene Deposits of East Anglia...Derbyshire are really only varieties of basalt rich in oligoclase, and not true spilites (Wells, Geol. Mag., July...Devono-Carboniferous These two systems there form one great of Belgium. — — Cycle of Sedimentation, but oscillations...and Doubtless sediments were laid down part of Belgium. over the whole of this original Basin or Basin |  | | Book (edition) | | Diagrams illustrating the Devonian Transgression in Belgium 120 31. Diagrammatic Section through the deposits...actually the case with the Devono-Carboniferous of Belgium. These 't\V0 systems there form one great Cycle...tectonic:" Basins '' of LonBelgium. IEoLIAN PRINCIPLES OF STRATIGRA PHICAJ. GEOLOGY..."Ii/ales, probably under the London District, to Belgium. GEOGRAPHY OF THE DEVONIAN PERIOD. To the north...running approximately fro1n the Bristol Channel to Belgium, the British Isles formed part of the great Devonian |  | | Book (volume) | | développé) ffm P &• i (100) (fig. 2). 1))) . OLIGOCLASE L’angle d’extinction dans Les i^OlO) mesurés...séparation suî- lortuose ™UTOngnhy. cédoine. OLIGOCLASE — (T. II, p. 169). Madagascar. A Alasora,...moins de pyroxène, beaucoup de quartz et un oligoclase rouges de {^pierre de soleil. Le même minéral...Sillimanile Uagnon (entre 57 1V.665 II. 172 Oligoclase-andésine Bouches-du-Rhône. ) et le col 57...Labrador Labrador-Bytown île 1.559 11.188 Oligoclase-Albite 11.173 11.787 IL.500 Galène Smilhsonile |  | | Journal (article/letter/editorial) | | interested in marine biology. On returning to Belgium, after an appointment at Ghent which led to nothing...Where the rock is a gneiss, it is composed of oligoclase, muscovite, biotite, and quartz, but contains...the gneissic character becomes less marked, the oligoclase diminishes in amount, and microeline begins to...south-easterly of these microcline is greatly in excess of oligoclase. The differences in structure and composition...and gneisses is stated to be almost exclusively oligoclase. :Even of those rocks whose origin may be regarded |  | | Report (issue) | | single plagioclase grains (P; albite to minor oligoclase; Table 1) exceeds that of potassium feldspar...Albite I 2 777a Albite I 2 777a Albite I 2 777a Oligoclase I 2 777a Albite SiO2 TiO2 Al2O3 CaO FeO BaO...000 0.000 0.871 0.003 4.913 2 97 0 I 2 777a Oligoclase 67.40 0.00 21.26 2.52 0.00 0.00 9.19 0.03 100...Zone Sample Mineral I 2 907 Orthoclase I 2 907 Oligoclase SiO2 TiO2 Al2O3 CaO FeO BaO Na2O K2O Sum Si...4.994 0 7 93 III 0 877b Orthoclase I 2 778 Oligoclase III 0 877b Orthoclase 65.10 0.11 18.05 0.02 |  | | Journal (article/letter/editorial) | | from which Maps have been received are those of Belgium, Finland, Saxony, Sweden, and Switzerland. The...Crustacean Shield fi'om the Upper Devonian of Belgium, 444.-H. B. Woodward. Notes on the Bure Valley...Rey-Pailhade. Note sur une analyse de 1 epidote de Quenast, 122.Trutat. La foret de Cedres de Teniet-el-Haud...iron and steel. 5th edition. 8vo. London, 1882. Belgium. Oommission de la Carte GeoZogique. Texte explicatif...Karnul, Madras, 8vo. Calcutta, 1881. - - . On Oligoclase Granite at Wangtu on the Sutlej, North-west Himalayas |  | | Book | | consequently it belongs to the felspar series from oligoclase-albitc to albjte . ---------,----- - * t t...exported £01· these purposes to Russia, Holland, Belgium and France. SPAIN. 77 The quartz 1·esidue from...microperthite, and although albite and all1ite-oligoclase are £ot1nd in all the Cornish granites, it is...Filling up joints in a slate near Liege a.n d ~Ions, Belgium, and at Lodeve, Dep. Herault, France . . (2.) Nests...derived f1~on1 an andesi te. At Neppe, near Quenast, Belgium, associated with pyrite in quartz-diorite |  | | Book (volume) | | qui seront décrits plus loin. Une pegmatite à oligoclase, riche en quartz, m’a fourni une très très...englobent tous les autres éléments de la roche (oligoclase, quartz). Ce grenat est brun jaune, en lames...Pisani [C. LUI. R. ; g, h) de la kaolinite de Quenast [Belgique], de Saint-Gilles près Liège, de La...sures de la diorite cjuartzifère Anjou. de Quenast {Belgique). — Afainc-et-Loire, La collection...suivant (OJ-O) (orthose laculée d’anorthose, oligoclase) et laissant entre eux des vides, remplis par |
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Porphyry quarries, Quenast, Rebecq, Walloon Brabant, Wallonia, Belgium