 | | Journal (article/letter/editorial) | | which nearly equal proportions of quartz (SiO2), plagioclase, and alkali feldspar (as separate feldspar phases...percent or more of the rock. In pegmatites, plagioclase lies close to the sodic end of the solid solution...albite, 26 × 17 × 13 cm, Kunar Valley, Nuristan Province, Afghanistan; Joe Budd photo, courtesy of The...textural, and mineralogical attributes of a layered pegmatite dike from near Palomar Mountain, San Diego County...in composition, and for convenience, the term pegmatite will refer to those of granitic composition in |  | | Journal (issue) | | CONTENTS Page Feature Articles: The Coolgardie pegmatite field, Western Australia Mark I. Jacobson ......Mineralogy Vol 3, No 2, December 1997 %e Coo(gardie Pegmatite :fie[� 'Western .9Lustrafia Mark I. Jacobson Chevron...70593 California, USA This n otable Australian pegmatite locality has produced a range of lithium minerals...the Western Australian outback, an abundance of pegmatite fields stretch from the fiercely hot and arid...Cattlin Creek pegmatite field,near Ravensthorpe in the south. The Coolgardie pegmatite field, near the |  | London, D., Morgan, G. B., Paul, K. A., Guttery, B. M. (2012) Internal Evolution of Miarolitic Granitic Pegmatites at the Little Three Mine, Ramona, California, USA. The Canadian Mineralogist, 50 (4) 1025-1054 doi:10.3749/canmin.50.4.1025 | Journal (article/letter/editorial) | | the temperatures recorded by feldspars in the pegmatite that surrounds the miarolitic pockets, then the...compositions. Keywords: miarolitic, granitic pegmatite, modal analysis, bulk composition, alkali feldspars...K-feldspar allow us to apply solvus thermometry to plagioclase – K-feldspar solvus pairs with high accuracy...Little Three mine are located within the Ramona pegmatite district, ~7.5 km east of Ramona, San Diego County...The Main dike contains the thickest section of pegmatite, 1026 the canadian mineralogist up to ~2.5 |  | | Journal (article/letter/editorial) | | beryllium and the crustal Be cycle from migmatite to pegmatite JOSEPH M. EVENSEN*† and DAVID LONDON School of...hydrous granitic melt and alkali feldspars, plagioclase feldspars, quartz, dark mica, and white mica...direction. At trace levels, Be is compatible in plagioclase of An31 (1.84 at 700°C) and muscovite (1.35 at...saturation of the melt in beryl: lower in the case of plagioclase of An31 (0.89 at 700°C), muscovite (0.87 at 700°C)...the final stages of the petrogenesis of granite–pegmatite systems. In combination with reported data on |  | | Report (issue) | | .. 42 ?. Muscovite in the vail zone of the pegmatite in tha Meadow mine, Avery Co. ..................area in the northeastern part of the Spruce Pine pegmatite district* on the Blue Ridge upland in western...constituents in order of decreasing abundance are plagioclase, perth.it ic mlcrocline, quartz, and muscovite...Sorvey Professional Paper describing pegmatite* in the Blue Iddge Province* In 1948, the general geologic Mapping...* which nake up the "rcetamorphie and plutonic province" (fig. 2). In North Carolina this belt is at |  | | Book | | Strontian crandallite from the Alto Benedeto pegmatite, Parai'ba, Brazil (by J.P. Cassedanne & L. Barreto)...21:409-412 --with J. P. Cassedanne: The Jaguara~u pegmatite, Minas Gerais, Brazil 25:165-170 9 AUTHOR/TITLE...23:209-225. 23:228 Al 'JAJ\ABO~OINA The Anjanabonoina pegmatite. Madagascar (by W. E. Wilson) 20:191-200 A.'\...Cassedanne: Strontion crandallite from the Aho Benedito pegmatite, Para!ba, Brazil 22:183-185 BARRINGERHILL Tveitite...Fe•3 analogue of bjarebyite [from the Big Chief pegmatite, South Dakota] (by A. R. Kampf) 8: 112-114 BIG |  | | Journal (article/letter/editorial) | | hambergite, danburite, and axinite from three pegmatite dikes (named Main, US Swamp, and Spessartine)...patterns of δ11BTur from margin-to-core of each pegmatite attest to a negligible fractionation of boron...only the bulk isotopic US composition of the pegmatite-forming melts. KEYWORDS AC CE PT ED M AN...influx of fluids from the host rock into the pegmatite (Trumbull et al., 2013). 3 ACCEPTED MANUSCRIPT...using the boron isotopic composition of each pegmatite to ascertain the likely source of the T boron |  | | Report (issue) | | William "Skip" Simmons and Alexander Falster, pegmatite specialists from the University of New Orleans...pegmatites. Most ore beryl occurs in massive pegmatite zones where crystals may reach considerable size...can be found adjacent to the core margin of the pegmatite and in Suggested Chromophores for Beryl Color-generating...the world's largest known beryl crystal is a pegmatite at Malakialina, Madagascar, which produced one...the giant-sized crystals found in the massive pegmatite portions. Morphology Beryl crystals are hexagonal |  | | Book (volume) | | California, is arguably the most important gem-pegmatite district in North America. Its wealth of tourmalines...towns, counties, and districts in each state and province arranged alphabetically; with an appendix, containing...minerals are listed by group (e.g. biotite, plagioclase) while some minerals are listed by variety (e...Mine in Topsham: both are small open pits in pegmatite. Morrill et al. (l 958) relieves the problem by...standard labeling procedures when they collect at unnamed sites. Locality data should be referred to nearby |  | | Journal (issue) | | e r a lo j g ic a l Volume Eight/Number Two PEGMATITE ISSUE #1 p u b lis h e r ls * h n Q n i. • ;...83 by R. Lasmanis The Clear Creek Pegmatite: A Rare Earth Pegmatite in Burnet County, Texas............. Iores K IO i DITOR Here it is: our first Pegmatite Issue! Actually this accumulation is a happy accident;...our file of articles I realized we had enough pegmatite-related papers to fill an issue. One advantage...a certain article. The article on the Harding pegmatite, for instance, may not cause “Vol. 8, no. 2!” |  | | Journal (volume) | | INSIDE THIS ISSUE: • The geology of Double Rock pegmatite • The Kemble family, long-term Franklin mineral...Photos From the Field 11 Geology of Double Rock Pegmatite From the Buckwheat Open Cut, Richard A.Volkert...crystals, epidote crystal druses, stromatolites, pegmatite with a pink scapolite/ diopside mix, and sparkly...International License. Geology of Double Rock Pegmatite From the Buckwheat Open Cut Richard A. Volkert...preserved in the geologic literature. This notable pegmatite is, of course, Double Rock. Pegmatites are an |  | | Book | | Roland Bouhelier in 1973 from the "Bouhelier pegmatite", and shortly thereafter acquired by the Canadian...Organic compounds 491 Partially studied and unnamed MSH minerals 494 Gemstones 514 Pseudomorphs...an accumulated repository of partially studied (unnamed) minerals. This is likely to continue for many...concerning the origin of the Monteregian Hills alkaline province, and a brief description of each member. The geology...and partially studied and unnamed (UK) minerals. For the unresolved unnamed minerals, all available technical |  | | Journal (issue) | | with tourmaline, have sustained the Golconda pegmatite field’s reputation as among the most important...districts in all of Brazil. INTRODUCTION The Golconda Pegmatite Field is a familiar name to mineral collectors...for mica produced in Minas Gerais. A rich, new pegmatite deposit in the Brazilian Golconda area, best known...including the region now known as the Eastern Pegmatite Province. Just below the center can be seen the Rio...of other pegmatite minerals. LOCATION AND ACCESS The Golconda District or Golconda Pegmatite Field, also |  | | Report (issue) | | Pegmatite Investigations 1942-1945 Black Hills, South Dakota By LINCOLN R. PAGE and OTHERS GEOLOGICAL...pocket] PLATE 1. Index map showing locations of pegmatite mines and prospects. 2. 3. 4. 5. 6. 7. 8. 9....Dakota. Geologic map and sections Beecher Lode pegmatite, Ouster County, South Dakota. Geologic map and...Geologic map and sections,' Elkhorn and Hot Shot pegmatite mines, Custer County, South Dakota. Geology of...of U. S. Bureau of Mines sample cuts, Elkhorn pegmatite, Custer County, South Dakota. Geologic map and |  | | Journal (issue) | | Rhodochrosite on Manganite N'Chwaning Mine, Northern Cape Province, South Africa. 8.7 cm In 1978 a historic discovery...of that year all of Burma became officially a province of India. Immediately following the annexation...25-carat round 30 brilliant which then went to an unnamed American buyer; its current whereabouts are unknown...pegmatites, most notably at the rich Sakhan-gyi pegmatite mines. Crossed-hammer symbols indicating important...Thus syenite, granodiorite, leucogranite and pegmatite bodies entered the Mogok Metamorphic Belt system; |  | | Journal (issue) | | part of the Monteregian Hills alkaline igneous province. LOCATION The Francon quarry is unusual in being...Proterozoic Grenville Province, and on the southeast by the Humber Zone of the Appalachian Province. The sedimentary...Zone marks the western edge of the Appalachian Province. In the Montreal area, the Taconic Orogeny is...Hills alkaline igneous province its name (Adams, 1903). The Monteregian Province comprises an east-southeast-trending...which intrudes Proterozoic rocks of the Grenville Province; the major plutons Mont Royal, Mont SaintBruno |  | | Book | | 2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series...Administered Tribal Areas and North West Frontier Province. Ilmenite crystal clusters to 12 cm across have...Mountain, Warsak district, North West Frontier Province. Surface diggings worked by local people on Zagi...attributions-the Xinig mine, Quinghai Province, and the Nan Dang mine, Guangxi Province-and those seen at Tucson were...II mine, Kalahari field, Northern Cape [Cape] Province. Although not quite equaling the inesite specimens |  | | Report (issue) | | Helpful suggestions on field occurrences and pegmatite mineralogy were received horn Dr. James J. Norton...north side of the tunnel entrance to the Greene pegmatite three miles east-northeast of Pringle has been...southeast part of the Gayle (Dubuque)-Royal Flush pegmatite 5.9 miles southwest of Custer by Redden (5) p...schist exposed at the Beecher No. 3-Black Diamond pegmatite four and one-half miles south-southeast of Custer...(1) p 14, 15. 3. Found with sillimanite in a pegmatite vein, associated with quartz, albite, microcline |
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