 | | Journal (article/letter/editorial) |
| category of corundum-bearing anatectic felsic pegmatite formed in mantle peridotite earlier subjected...overprint by a mixed H2O + CO2 fluid. The bulk of the pegmatite bodies encountered are not obviously of anatectic...an LCT pegmatite also being affected by an LCT-type overprint, to form a “super-LCT pegmatite” is explored...economic potential of pegmatite occurrences. Keywords: granitic pegmatite, felsic pegmatite, classification...+ CO2. En revanche, la plupart des venues de pegmatite sont le produit du fractionnement d’un volume |
 | | Book (edition) |
| additiona l observations on tests and on mineral occurrences which can be included in later editions. There...Oxides The Halides The Carbonates Calcite Group Aragonite Group The Nitrates The Borates The Sulphates The... Fluorite (octahedron), Sylvite, Atacamite 5 Pegmatite Quarry and a Traprock Quarry : 6 Iron, Arsenic...Schist 317 44 Sedimentary Rock Outcrops and a Pegmatite Quarry 45 Gummite, Uraninite, Autunite, Uranium...consider specializing in some field: one mineral, one group, one locality, a crystal system, or the like. You |
 | | Book |
| William J. Brunet set out to trace three ilmenite occurrences mentioned in late 19th-century literature. One...massive calcite. or, rarely, still attached to the feldspar/mica walls of the dike (www.davidkjoyceminerals...specimens in which euhedral crystals of andesine feldspar, augite and ilmenite rest on matrix of fine-grained...columnar crystals of hedenbergite. Around 1960. a group of collectors visited the mine. then temporarily...Mcgaw, per'>onalcommunication, 2007). 4 ITALY Rio Marina area, Island of Elba, Tuscany. Elba (Latin: |
 | | Report (issue) |
| Minister J. E. Thomson, Director, Geological Branch Pegmatite Mineral Resources of Ontario By D. F. HEWITT.....l Pegmatite Mineral Production in Ontario (Table 1). . . . . .. . . . ... Number of Pegmatite Deposits.... . . . .. .l .l .l .2 .2 .3 .3 .5 .5 .5 .5 FELDSPAR .. ......................................................,...............9 Principal Types of Feldspar (Table 4). . . . . . . ... . . . ... . . . . ..... . . . . ... . . . .. . . . 9 Selling Crude Feldspar in Ontario. . . . . . . . . ... . . . . .. . |
 | | Report (issue) |
| _ Beryl_______________________________ Helvite group._________________________ Other minerals-._____...of beryllium-bearing deposits.______ Related occurrences........___________________ Beryllium in vein...____ Old Placers district.____________________ Sierra County-_____________________________ Apache No...-_-_---_------_----_-Index map of beryllium occurrences in Dragoon Mountains, Cochise County, Ariz__...________ Index map of the Apache mining district, Sierra County, N. Mex___________________ _________________ |
 | | Report (issue) |
| greater measure of critical judgment regarding occurrences than was made by Ziegler is necessary in a work...two decades has checked essentially all of the occurrences and the literature of the minerals of the Black...identifications. Helpful suggestions on field occurrences and pegmatite mineralogy were received horn Dr. James...addition to the Black Hills proper. important occurrences from the Bad Lands and indeed all of South Dakota...the pertinent literature, and the important occurrences. In the appendix all known mineral locality names |
 | | Report (issue) |
| Paraurichalcite-11 Rossingite Physical varitites Group names Ba feldspar Heliodor(e) Tantalo-columbite Pietersite...proved mineral names (uncertain status, mixtures, group names and physical varieties). 11 2. Approved...information on chemical formula; analogue and mineral group status; up-to-date crystal structure and unit cell...s111dies on each mineral; listings of other known occurrences and etymology. No attempt however is made to...Arsenate analogue of brackebuschite. Brackebuschite group. Monoclinic; 2/m; P21/m; Z=2; a=7.764 b=6.045 c=9 |
 | | Book (volume) |
| California, is arguably the most important gem-pegmatite district in North America. Its wealth of tourmalines...associated species related to their individual occurrences, and unique scientific information may be derived...anastomosing beds, debouching streams, etc. Occurrences which are located have been mapped in the cited...will be described according to their specific occurrences, frequently with sufficient detail to note the...usually demonstrate the morphologies discussed. Occurrences which have not been personally viewed will rely |
 | | Book |
| major constituents the three rock-forming minerals feldspar, quartz and mica, which in places develop mega-crystals...share of raw material extracted from pegmatites is feldspar, quartz and mica, and only a tiny fraction of...would like to do. Hagendorf has been mined for feldspar and the deposit is not yet exhausted as far as...quartz at the core of the pegmatite is concerned. In comparison with other pegmatite deposits in the area...Hagendorf-Pleystein Pegmatite Province (HPPP) is not only the largest concentration of feldspar and quartz of |
 | | Report (issue) |
| FELDSPAR AND MICA DEPOSITS OF GEORGIA CUT ON FLAT SHOALS ROAD NEAR SCHOOL HOUSE, LOT 110, 15th DJST...DJST., DeKALB COUNTY, GEORGIA, SHOWING PEGMATITE DIKE IN MICA SCHIS'.r. FRONTISPIECE GEOLOGICAL SURVEY...BULLETIN No. 30 A PRELIMINARY REPORT ON THE FELDSPAR AND MICA DEPOSITS OF GEORGIA BY !3. L. GALPIN... L. Galpin, Assistant State Geologist, on the Feldspar and Mica Deposits of Georgia, to be published...information regarding the occurrence and nature of the feldspar and mica deposits which exist in the State. That |
 | | Report (issue) |
| of Mining Districts and significant mineral occurrences of Nevada by Nevada Bureau of Mines and Geology...back) Mining districts and significant mineral occurrences of Nevada xX ILLUSTRATIONS Preface STEPHEN...mining operations will preclude collection with occurrences of mineral species in the state. Publications...occurring in the state, but included descriptions of occurrences for only the most common. In 1985, an issue of...book consists primarily of a catalog of mineral occurrences in Nevada. Separate articles on some specific |
| | Report (issue) |
| of M ining Districts and si gnificant minernl occurrences of Nevada by Nevada Bureau of Mines and Geology...back) Mining districts and significant mineral occurrences of Nevada ILLUSTRAT IO NS Preface STEPHEN...been produced that deah con1prehens1vely \\'ith occurrences of n1ineral species in the state. Publications...occurring in the state, but included descriptions of occurrences for only the n1ost comn1on. In 1985, an issue...consists prin1arily of a catalog of n1i neral occurrences in Nevada. Separate articles on son1e speofic |
 | | Book |
| of published sources on all known aspects and occurrences of this mineral, and the results of experimental...previously. Amazonite is a variety of potassium feldspar, a group of minerals extremely widespread in the Earth’s...considered one of the first mineralogical criteria for pegmatite prospecting and evaluation. The formulation of...The negative conclusions were based mainly on occurrences of pegmatites similar in type to those containing...mineralization but no amazonite, as well as occurrences of amazonitic pegmatites with subeconomic or |
 | | Report (issue) |
| Distribution and structure PAPER 248-A of pegmatite bodies in the area, their mineralogical characteristics...economic possibilities of the mica and other pegmatite minerals UNITED STATES GOVERNMENT PRINTING OFFICE...and terminology ________ ___________ _ Types of pegmatite units _______________________ _ Zones _______...________________________ _ Structurai characteristics of pegmatite bodies _______ _ Simple pegmatites _________________________...pegmatites ______________________ _ :\Iinerals of the pegmatite areas __ ___________________ _ Occurrence ___ |
 | | Journal (volume) |
| Outokumpu Geo!. Dept., New England, Freetown, Sierra Leone, B. W. A. Otakallio, Otaniemi Luikonlahti...The crystal symmetry class is D Sd -3m and space group R3m, R32 or R3m. Its hexagonal cell dimensions are:...selenide minerals. His description of the Biselenide group is confined to the rhombic guanajuatite (isostructural...(1949) concerning the minerals of the tetradymite group. X-RA Y INVESTIGATION The powder patterns were...(-h + k + l) = 3 n reflected. The possible space group is R3m, R32 or R3m. Co is determined from (OOOI)-reflections |
 | | Journal (volume) |
| Outokumpu Geo!. Dept., New England, Freetown, Sierra Leone, B. W. A. Otakallio, Otaniemi Luikonlahti...The crystal symmetry class is D Sd -3m and space group R3m, R32 or R3m. Its hexagonal cell dimensions are:...selenide minerals. His description of the Biselenide group is confined to the rhombic guanajuatite (isostructural...(1949) concerning the minerals of the tetradymite group. X-RA Y INVESTIGATION The powder patterns were...(-h + k + l) = 3 n reflected. The possible space group is R3m, R32 or R3m. Co is determined from (OOOI)-reflections |
 | | Book |
| 1.2 2. Chemistry of Feldspars Topology of the Feldspar Framework 3. Patterns of AI, Si Order-Disorder:...3.5 Intermediate Plagioclases The M Cations in Feldspar Structures 5. POTASSIUM IN SANIDINES AND MICROCLINES... Future Work References 2. ASPECTS OF ALKALI FELDSPAR CHARACTERIZATION: PROSPECTS AND RELEVANCE TO PROBLEMS...Si ORDER IN Na 5.4 FELDSPAR STRUCTURAL MODULATIONS IN NATURAL POTASSIUM 5.5 FELDSPAR ON THE EFFECT OF Na-K...Introduction 1. Ternary Feldspar Geothermometry 2. 2.1 ACTIVITY MODELS FOR TERNARY FELDSPAR SOLID SOLUTIONS 2 |
 | | Book (volume) |
| .......... 315 Duane L. Leavitt The Bennett Pegmatite, Oxford County, Maine . ........................Moore Electron Microprobe Analyses for Crandallite-Group Minerals from Maine Pegmatites ...................and New England geological and mineralogical occurrences, as well as on ornithological and botanical topics...first visit to the tourmaline-bearing granite pegmatite at Mount Mica in 1952 and Gene eventually completed...thesis on the famous tourmalinebearing Himalaya pegmatite at Mesa Grande, San Diego County, California. |
 | | Book (edition) |
| minerals. An interesting case in point concerns a group of lead oxychloride minerals from Laurium, a town...they are discovered Many interesting mineral occurrences have become inaccessible for further study, due...indicated. The term industrial mineral embraces another group of minerals of economic importance. This term may...symbols indicates why it is general practice to group the 32 crystal classes into six or seven crystal...indefinitely in three dimensions. The repeating group of atoms consists of a small parallelepiped, called |
 | | Book |
| Roland Bouhelier in 1973 from the "Bouhelier pegmatite", and shortly thereafter acquired by the Canadian...scale, countless scientifically interesting occurrences. No other locality in the cou;ntry, however,...be tabulated with data for other members of the group. Drawings of idealized crystals by Laszlo Horvath...Labuntsovite-, Zeolite-, Lovozerite- and Cancrinite-group minerals and directed studies on fenite rocks. Dr...briefly mentioned the presence in the rock of feldspar, black hornblende, a copper-colored mica, and |
 | | Book |
| ........................... 529 G: gadolinite group to gyrolite ......................... 226 X: xanthiosite...MB/ are a series of maps to give the mineral occurrences both a spatial and geological context, and some...further 154 species are unconfirmed. If all the group, series, variety and discredited species names are..."British" species. A further 11 British first occurrences have since been recorded from specimens held...species to his increasing list of British first occurrences. What went unnoticed at the time was that the |
 | | Book |
| photolaboratory in Kuopio. Around a hundred occurrences described in this book demonstrate that more... . . . . . . . . . . . . . . . . . . . . 43 Pegmatite deposit in Kaatiala . . . . . . . . . . . . ...prospecting of gemstones . . . . . . . . . 49 Pegmatite deposit in Haapaluoma . . . . . . . . . . . .... . . . . . . . . . . . . 304 the Viitaniemi pegmatite . . . . . . . . . . . . . . . . . . . . . 104...orbicular rocks. He is particularly familiar with the pegmatite mineralogy, even described two new mineral species |
 | | Book (volume) |
| order to compare with the indices of an adjacent feldspar. Cross the nicols and rotate the stage u n til...Anthophyllite 0.026 Pigeonite 0.026 Tourmaline group 0.026* Clinozoisite - epidote series 0 .0265* Diopside...a-Trldymite 0.0035 0.004 Nepheline 0.004 Apatite Group 0,004 Orthoclase 0.005 Sanidlne 0.0055 300 0.006...akermanite series 0.0o6• Anorthoclase 0.0065 Serpentine group 0.0065 Microcline 0 007 400 0.008 500 0.010...2.30 n-1m. 17. Oxyhornblende (A2) (left) and feldspar phenocrysts in an extrusi ve igneous rock. The |
 | | Report (issue) |
| Pegmatite Investigations 1942-45 New England By EUGENE N. CAMERON and OTHERS GEOLOGICAL SURVEY PROFESSIONAL...______________________________________ _ Location of pegmatite districts ___________________ _ Previous work...Acknowledgments ______________________________ _ History of pegmatite mining inN ew England _______ _ Mica mining _...______________________________ _ Feldspar mining ___________________________ _ Mining methods _______...deposits _______________________ _ Geology of the pegmatite districts of Maine __ :. . _____ _ Metamorphic |
