 | | 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) | | 0016~7037/89/33.00 + .XI River Valley pluton, Ontario: A late-Archean/edy-Proterozoic anorthositic...revisedfirm December 15, 1988) Abstract-The River Valley pluton is a ca. 100 kmâ bcdy of anorthositic and...leuconorite and leucogabbro, with lesser anorthosite, gabbro, and rare ultramalics. Igneous textured rocks are...low Ca pyroxene (otthopyroxene and/or inverted pigeonite) and augite. The most unfiactionated rocks are...the time of primary crystallization. The River Valley pluton is thus the oldest anorthositic intrusive |  | Connolly, Harold C., Zipfel, Jutta, Grossman, Jeffrey N., Folco, Luigi, Smith, Caroline, Jones, Rhian H., Righter, Kevin, Zolensky, Michael, Russell, Sara S., Benedix, Gretchen K., Yamaguchi, Akira, Cohen, Barbara A. (2006) The Meteoritical Bulletin, No. 90, 2006 September. Meteoritics & Planetary Science, 41 (9) 1383-1418 doi:10.1111/j.1945-5100.2006.tb00529.x | Journal (article/letter/editorial) | | Senckenberganlage 25, D-60325, Frankfurt am Main, Germany 4U.S. Geological Survey, MS 954, Reston, Virginia...16°54â˛09â˛â˛S, 30°24â˛26â˛â˛E Mafuta Farm, Makonde District, Zimbabwe Find: 1 December 1984 Iron (IID) History:...found an iron meteorite on Mafuta Farm, Makonde District, northern Zimbabwe. In 1993, Mr. Alexander agreed...The meteorite is mostly composed of olivine and pigeonite with minor orthopyroxene. The Px/(Px+Ol) ratio...CaO = 0.33; Cr2O3 = 0.64 [both wt%; n = 47]), pigeonite (En82.8Wo7.9; Cr2O3 = 0.99, Al2O3 = 0.57, MnO |  | | 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...2.2 Augite group 4.2.2.3 Titanaugite 4.2.2.4 Pigeonite 4.2.2.5 Aegirine-augite series 4.2.2.6 Jadeite...Schwabische Alb and in the Laacher volcanic areas of Germany. 2. We give emphasis to the common minerals. They |  | | 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 |  | | Book | | chiastolite slate; Skiddaw Granite aureole, Lake District, England. c) Poikiloblastic staurolite porphyroblasts...Nepheline Leucite Analcite 1.3.3 Augite Olivine Pigeonite Orthopyroxene Anorthoclase Oxo-Hornblende Porphyroblasts...in oblique section of tourmaline (main crystal, lower right). Also note the end-section of yellow-green...to determine whether a mineral is of higher or lower relief than its neighbour, or with respect to the...minerals with relief, and thus refractive indices, lower than the mounting medium are described as having |  | | Journal (article/letter/editorial) | | typical diabases, with unusual features such as pigeonite with semispherical fractures and pale-green pyroxene...bodies, the H u n g a r y Brook and Quarry bodies, occur in the lower p a r t of the M a n i t o o k M o...aphanitic diabase at chilled borders to quartz gabbro in interior parts. Because of the generally fine...metamorphosed lower Paleozoic rocks. Fine-Grained Diabase. Fine-grained diabase occurs in lower and upper...n t a i n and Barndoor Hills bodies and in the lower chilled margin of the H u n gary Brook and Q u a |  | | Journal (article/letter/editorial) | | there were many exceptions. (2) Acidic rocks gave lower helium age ratios than basic rocks of the same geologic...measurements on late pre-Cambrian rocks from the Sudbury district, Ontario, had suggested that this region might...elium in 1 0 -6 cc/g R ock specim en Sudbury gabbro............................ Norite...............and loss of helium atoms from its structure, a lower age ratio would be obtained for this mineral than...has shown that the age ratio in feldspar is much lower than in pyroxene separated from the same rock. Six |  | | Journal (article/letter/editorial) | | composition field between augite (Wo<25) and pigeonite (Wo ) 15) which he correlated with optic angles...exceedingly difficult to separate the augite from the pigeonite since both of these minerals are zoned and their...could be done was to produce an augite and a pigeonite concentrate, analyze both, and from the proportions...between 45o and 55" should be marked as having lower accuracy than those below 45o. Normally about ten...averaged giving greater weight to the angles with lower tilt. From such a seriesof measurementsall anglesin |  | | Journal (article/letter/editorial) | | 415â442. LowSulfide PGE Ore in the Volchetundra GabbroâAnorthosite Pluton, Kola Peninsula, Russia V. V...AbstractâThe internal structure of the Volchetundra gabbroâanorthosite massif is considered, including localization...metallogenic epoch are known only in the Lovnozero ore district in the central part of the Lapland Granulite Belt...About ten deposits of sulfide NiâCu ore related to gabbroâwehr lite intrusions have been explored here....PechengaâAllarechka ore district. The Monchegorsk NiâCuâCrâPGE ore district is located in the central |  | | Book | | names like granogabbro (granite-gabbro), monzogabbro (monzonite-gabbro), rhyodacite (rhyolite-dacite)...[Vulcan, Roman god of fire], plutonite (Pluto and the lower world), and Peleâs hair (Hawaiian fire goddess)...tribal peoples: bojite (Boii, Celtic tribe in Germany), gondite (Gonds, central India), onkilonite (Onkilones...sthene) are the essential constituents; differs from gabbro by the presence of the Definition proposed prthopyroxene...lUGS, plutonic rock satisfying the definition of gabbro, in which pl/(pl + px + ol) is 10-90 and the opx/(opx |  | | Book (volume) | | intrusion, east Greenland. Crossed polars x60. A. B. Pigeonite inverted to orthopyroxene with exsolved augite...pyroxene. Bushveld complex. Crossed polars x60. C. Pigeonite inverted to orthopyroxene with exsolved augite...(hourglass) zoning, nepheline dolerite, Lobauer Berg, Saxony. Crossed polars x20. ROCK-FORMING MINERALS Volume...Introduction 3 Magnesium-Iron Pyroxenes Orthopyroxenes Pigeonite 162 Calcium Pyroxenes Diopside-Hedenbergite...Jahrbuch fur Mineralogie ABH; Springer-Verlag (Germany) for diagrams from Contributions to Mineralogy |  | | Report (issue) | | GEOLOGY OF THE DULUTH GABBRO COMPLEX NEAR DULUTH, MINNESOTA UNIVERSITY OF MINNESOTA MINNESOTA...D IRE C TOR BULLETIN 44 Geology of the Duluth Gabbro Con1plex near Duluth, Minnesota BY RICHARD B...Group ............................... 6 Duluth Gabbro Complex .................................. 6 ...................................... 7 DULUTH GABBRO COMPLEX . . . . . . . . . . . . . . . . . . . .................. 8 INTRODUCTION Anorthositic Gabbro ....................................... 8 General |  | | Book (edition) | | 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...byssolite. Mono- coast of North America: Kobuk River Valley, Alaska, clinic, C2/m, a,b,c = 9.89, 18.20, 5.31 |  | | Journal (article/letter/editorial) | | ITAĚT, ALBERTSTRASSE 23 B, D-79104 FREIBURG, GERMANY 2 DEPARTMENT OF GEOLOGY AND GEOPHYSICS, UNIVERSITY...in detail the FeâTi-oxide-bearing anorthositic gabbro near Napp on the island of Flakstadøy. Heier &...a middle troctolite (GM 263, 265) and a western gabbro (GM 333, GM 139) (Romey, 1971). The contacts between... ultramafic cpx, ol, amph, chr, plag GM 109 quarry 500 m W of Sund Flakstadøy charnockite cpx,...Flakstadøy olivine cpx, ol, plag, ilm, mt GM 254 quarry near Ălkona Moskenesøy charnockite cpx, pig |  | | 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 âSerie dei Laghiâ (Southern...Pb6Sb6S14(S3), a new mineral from the Ceragiola marble quarry..................................................crystal diffraction data from orthopyroxene and pigeonite. ............................................ |  | Hamilton, Warren, Hayes, P.T., Calvert, Ronald, Smith, V.C., Elmore, P.S.D., Barnett, P.R., Conklin, Nancy (1965) Diabase sheets of the Taylor Glacier region, Victoria Land, Antarctica, with sections on petrography and sections on chemistry. Professional Paper 456b. US Geological Survey doi:10.3133/pp456b | Report (issue) | | 6. Pyramid Mountain and west wall of Beacon Dry Valley.-_--_-----____-----------_-----------12 7. Irregular...________-____-_-----------13 8. Diabase sheets of Beacon Dry Valley-New Mountain area.____________________-_-_----_-_----14...______--_____---_--_----16 13. View north across Solitary Dry Valley toward diabase sheets.__________________-__----__-_----17...peneplain sill in the upper part of Wright Dry Valley.____-_____________---------_------__ 21 18. Basement...Valley_____________________________ 22 19. Basement sill along lower Ferrar Glacier_-_---__--__--------_-----_------ |  | | Book (volume) | | .... 92 Jadeite ......... 99 Augite.109 Pigeonite ......... 143 Omphacite ......... 154 Fassaite...Johannsenite Aegirine Spodumene J adeite Augite Pigeonite Omphacite Fassaite (Mg,Fe+2)2Si206 Ca(Mg,Fe+2)Si206...are monoclinic in the high-temperature form (pigeonite) and orthorhombic in the low-temperature form...The structures of the two monoclinic phases, pigeonite and clinoenstatite, have the space group P2i/c...principal comÂŹ binations are: augite with (001) pigeonite lamellae (x and y coincident), augite with (100) |  | Krivolutskaya, N. A., Smolâkin, V. F., Svirskaya, N. M., Mamontov, V. P., Fanygin, A. S., Belyatskii, B. V., Roshchina, I. A. (2010) Geochemical features of the drusite massifs, the central part of the Belomorian mobile belt: I. Distribution of major and trace elements in the rocks. Geochemistry International, 48 (5) 465-491 doi:10.1134/s0016702910050046 | Journal (article/letter/editorial) | | features and were transformed into metagabbro, garnet gabbro, and garnetâbiotitebearing plagioamphibolites...Initially, the drusite complex combined peridotite to gabbro rocks [4], which were interpreted as differentiation...were subdivided into two series [7]: peridotiteâgabbro and gab broâanorthosite bodies produced by the...relations, distinguished differentage complexes of gabbroanorthosites (partly corresponding to the early...orogenicâlate orogenic drusites), and coronite gabbro (partly late orogenic drusites). The development |  | | Journal (article/letter/editorial) | | pyroxenite, glimmerite, hornblendite, norite, and gabbro. In most cases peridotite is the dominant rock...in the Nandewar Mountains. Brown (1929) recorded gabbro and other xenoliths from a dyke near Moruya, and...basalt flow which is at least 50 ft thick. About the lower half of the exposure contains abundant ovoid olivine...mile north of the New England University. A small quarry in this flow, which is one of many flows carrying...xenoliths are closely associated with pyroxenite and gabbro xenoliths. Two such occurrences are the Dundas |  | | Journal (article/letter/editorial) | | â T h e serpentine is distinct from the gabbro, but the gabbro and basalt are closely related, b e h g...dacite-porphyry in places also has relations to the gabbro, although it is in the main distinct.â There are...Peninsula with Special Reference to Those of the Kinta District. BY R. F. PENROSE, JR. f. Geol., 11, 135-154 ;...brucite (60 per cent.). T h e rock is from the quarry of the United States Marble Company, twelve miles...the specimen analyzed having been taken from the quarry of Huntington and Clough, and is of such an extraordinary |  | | Journal (article/letter/editorial) | | mctachlorite, occurring as fine scaly masses in the gabbro of Badauthal, Harz (Brunswick). 366 L . J ....sandstones altered by contact with basalt in central Germany. ~.isenr6merit.' ~qeeferror~merite. ~.rzbergite...reddish-violet colour in a rock called tawite from the Tawa valley, Kola peninsula, Lapland. I t has the composition...occurring in contact with serpentine in the Lotru valley, southern Carpathians. 3(Ca,~g)O 2.A120 s . 4SiO...aggregates in the decomposed basalt of the ~oorabool valley, Victoria. In chemical composition, and in the |  | | Book | | Canada (Superior Province) ......... 2.12.1.1 The Bad Vermilion Lake Complex, Ontario ...................(Ieuconorite) add "oxide-rich" if ilm + mag> 10% olivine gabbro (norite) olivine melagabbro (norite) melagabbro...which the dominant mafic mineral is pigeonite or inverted pigeonite with norites and leuconorites. The...W.C. Phinney and colleagues has focused on the lower grade Archean anorthosite occurrences, particularly...Sittampundi (India), Messina (South Africa) and Bad Vermilion Lake (Ontario) complexes, but there are |  | | Book (edition) | | associated Metamorphism with with High-pressure Lower-pressure Rock Name Index (see Glossary of Rock...|Lime gabbro (mugearite ) pyroxene, |Andesine gabbro olivine (hawaiite) |Lime pyroxene, |Gabbro, dolerite...Absent Absent orthopyroxene Orthopyroxene, pigeonite and lime pyroxene and some olivine Lime pyroxene...Orthopyroxene Quartz gabbro, quartz dolerite (tholeiite) Gabbro, hornblende gabbro, norite, troctolite...syenites, gabbros, etc., are called syenite aplites, gabbro aplites. (pp. 230, 234, 236.) Appinite. Dioritic |  | | Journal (article/letter/editorial) | | Origin of Ophitic Texture in the Chilled Olivine Gabbro of the Skaergaard Intrusion By L. R. WAGER (PLATES...ABSTRACT The textures of the chilled marginal gabbro of the Skaergaard intrusion and of the coarser...pyroxene and ilmenite about scarce nuclei, produced at lower temperatures, presumably during the early labile...supersaturation for these two minerals. The coarser gabbro, further in from the margin, has about half the...explained along similar lines. THE chilled olivine gabbro occurring at the margins of the Skaergaard intrusion |
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