1 edition of Mineralogy, internal structure and genesis of beryl pegmatites, Renfrew County, Ontario found in the catalog.
Mineralogy, internal structure and genesis of beryl pegmatites, Renfrew County, Ontario
Written in English
|LC Classifications||QE 191 G738 1952 thesis|
|The Physical Object|
|Number of Pages||129|
the Tanco pegmatite, Manitoba, Canada, although other pegmatites, such as Bikita, contain signiﬁ cant reserves. Beryllium production is dominated by the rhyolite-hosted epithermal bertrandite [Be4Si2O7(OH)2] deposit at Spor Mountain, Utah, USA. However, beryl from pegma-tites continues to be a lesser, but local, source of beryllium. Renfrew County Ontario (1) Quebec mineral deposits, genesis (14) mineral exploration (2) nonmetal deposits (2) of the pegmatite is principally composed of quartz, albite, muscovite and spodumene. Initial sampling indicates that microcline is sparse and occurs in the spodumene zone and in rare miarolitic cavities.
Mountain spodumene pegmatite, Silver Springs Creek beryl pegmatites, Haystack Range mica pegmatites, Big Creek pegmatite district, and a scattering of other pegmatites in Albany, Laramie and Converse counties. Only Figure 2. Pink beryl (morganite) on albite with lepidolite from the Stewart lithia mine, Pala, San Diego County, CA. Tucson. The geochemistry and crystal chemistry of columbite-group minerals from granitic pegmatites, southwestern Grenville Province, Canadian Shield Article (PDF Available) .
From abstract: Pegmatite occurs widely in Nevada and northwestern Arizona, but little mining has been done for such pegmatite minerals as mica, feldspar, beryl, and lepidolite. Reconnaissance for beryl-bearing pegmatite in Nevada and in part of Mohave County, Ariz., and detailed studies in the Dawley Canyon area, Elko County, Nev., have shown that beryl occurs in at least 11 districts in the. The beryl-bearing pegmatites occur as true dikes or lensoid bodies in parental granitic rocks and in adjacent metamorphic rocks in close exocontact with the granite intrusions. The thickness of the pegmatites generally at-tains from to 2 m, and locally up to 8 m (Moravany nad Váhom pegmatite). The pegmatites show internal.
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Some fugitive thoughts on a letter signed Freeman, addressed to the deputies, assembled at the High Court of Congress in Philadelphia.
The mineralogy of pegmatites EorrBo sy GonooN E. BnowN. Department of Geology S taffird U niv e rsity, S tanford, C alifornia 94 The Mineralogical Society of Anerica, in conjunction with che Friends of Mineralogyy held a eynpoeiuu on February r l98l in Tucson, Arizona, on the Mineralogy.
Studies of strategic mineral deposits in the major domestic pegmatite districts by the U. Geological Survey from toprimarily for the purpose of increasing production of mica, beryllium, lithium, and tantalum minerals, resulted in the clarification of many problems related to the general.
features, internal structure, mineralogy, and origin of granitic pegmatites. The crystal structure of beryl consists of layers of rings with 6 Si-O tetrahedra, which are linked vertically and laterally by Be-O tetrahedra and Al-O octahedra (Bragg and West, ;Gibbs et al.
Beryl and Be-mineralization in Pegmatites of the Oxford Pegmatite Field, Maine, USA Article (PDF Available) January with Reads How we measure 'reads'. Granitic pegmatites - Volume 87 Issue - David London.
The primary focus of this review is on P-T conditions, mineralogical indicators of melt or fluid composition and textural evolution; lesser treatment is given to pegmatite sources or to pegmatite-wallrock interactions.
Investigations of stable and radiogenic isotopes have revealed that the source materials for pegmatites are likely to.
STRUCTURE AND MINERALOGY OF THE GOLCONDA PEGMATITE, MINAS GERAIS, BRAZIL* W. PBcona,l Gponco Swrrznn,2 A. ,s aNn A. MyBnsl Alsrn,tcr The granite pegmatite at the Golconda mine in Minas Gerais, Brazil, is a zoned, sheet-like mass in schist.
Most of the estimated 1, metric tons of mine-crude muscovite mined. The gem-bearing complex granitic pegmatites of San Diego and Riverside Counties, California, have been ob-jects ofstudy since their discovery in the s. Exploi-tation, initially for gems and later for specimen-quality minerals, began in with the discovery of the Himala-ya dike system in the Mesa Grande district (Rynerson, ; Foord.
Madawaska Mines, Bancroft, Ontario: Deformation of the Faraday Metagabbro Complex and Its Influence on Uraniferous Pegmatite Emplacement and Ore Deposition University of Toronto.
pegmatites also display the most evolved internal struc- ture and attain the most extreme levels of fractionation encountered in terrestrial rocks (Č ern´ y et al. Inspection of Al-Si ratios in the EDS-spectra in combination with elemental analysis and optical microscopy allowed to recognise Li- and Be-bearing minerals as petalite, spodumene and beryl.
The samples were classified into 21 distinct mineral associations or pegmatite mineral zones. This book is not intended for the professional mineralogist or petrologist, but does contain a sufficiently comprehensive coverage that the serious reader can develop a thorough understanding of pegmatite mineralogy and s: 1.
Beryllium is one of the most widespread rare elements in granitic pegmatites. These rocks have been historically the sole industrial source of this metal (e.g., Norton et al. ), and they still contribute a significant proportion of the global output of beryllium ores.
From inside the book. 15 other sections not shown. Other editions - View all. Internal Structure of Granitic Pegmatites Eugene Nathan Cameron plagio plagioclase Plagioclase-quartz Plagioclase-quartz-muscovite quartz core quartz-perthite replacement bodies Rio Arriba County schist sequence of mineral similar sodic albite South Dakota.
Co-genetic pegmatites associated with the granite of the Kawadgaon area in the Bastar craton, Central India, contain a wide range of ore minerals of Nb, Ta, Be, Sn, Zr, Ti, and REE, including columbite-tantalite, ixiolite, pseudo-ixiolite, wodginite, tapiolite, microlite, fersmite, euxenite, aeschynite, beryl, cassiterite, monazite, xenotime, zircon, ilmenite, triplite, and magnetite.
There is. Beryl Be3Al2Si6O18 °c Mineral Data Publishing, version Crystal Data: Hexagonal. Point Group: 6=m 2=m 2=m: Crystals prismatic to tabular, with fg, fg, and fg; may be complexly terminated by pyramids, to 18 m and t. magmatic stage of pegmatite development, the white beryl of the Keystone district in the Black Hills, the cesium beryl and rare beryllium minerals of central Maine, the gem beryls of Madagas-car, and the aquamarines and emeralds oI Bruzil, Colombia,l26 and the Urals are considered to be products of a hydrothermal beryl-lium phase.
Pegmatite occurs widely in Nevada and northwestern Arizona, but little mining has been done for such pegmatite minerals as mica, feldspar, beryl, and lepidolite.
Reconnaissance for beryl-bearing pegmatite in Nevada and in part of Mohave County, Ariz., and detailed studies in the Dawley Canyon area, Elko County, Nev., have shown that beryl occurs in at least 11 districts in the region. Beryl () is relatively common and spatially associated with granites and granitic pegmatites, but emerald is rare because trace amounts of Cr and/or V are required (to replace Al in the crystal structure) and these elements generally do not occur in sufficient concentrations in granitic rocks.
Compositionally, the pegmatites consist of the feldspars,quartz, and muscovite with local concentrations of accessory minerals such as beryl, spodumene, tourmaline, columbite-tantalite, triphylite-lithiophilite, amblygonite, and minor sulfides and arsenides.
Although the bulk composition reflects that of the parent granite, important. Pegmatite in which the main ingredients are biotite mica (black), microcline (pink), oligoclase (white), and quartz (gray).
The rock has a monzogranitic composition. Evje, Norway. Cleavelandite is a lamellar variety of almost pure albite. It forms as a late-stage mineral in pegmatites by replacing other minerals.
Width of sample from Ontario is. Barker-Ferguson beryl mine_____ Big Chief feldspar mine_____ has Custer as its county seat. The Keystone district, which is of small size but has a record of lar^e pro DEPOSITS OF SOME PEGMATITES GEOLOGY AND MINERAL DEPOSITS OF SOME PEGMATITES - GEOLOGY AND MINERAL DEPOSITS OF SOME PEGMATITES MINERAL DEPOSITS.The Peerless pegmatite, half a mile south of Keystone, Pennington County, S.
Dak., has been a large source of scrap mica and beryl. Feldspar, amblygonite, tantalite-columbite, and cassiterite also have been recovered. The pegmatite is intrusive into Precambrian quartz-mica schist. Much of the schist contains staurolite and chlorite. Staurolite has been partly altered to mica, quartz, and.CLASSIC MINERAL OCCURRENCES: I.
GEOLOGY AND MINERALOGY OF THE RUTHERFORD PEGMATITES, AMELIA, VIRGINIA Jouw SrNrnNxs, Van lVuYs Court, San Diego, Cali'fornia ' ABSTRACT extremes mentioned.
INrnotucrroN From this study it is now possible to describe more fully the internal structure and mineralogy of the No. 2 pegmatite body and, to a lesser.