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| 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 |
 | | Report (issue) |
| . Mica rocks of the Carolina-type ....... Mioa gneiss .............. Mica schist .............. Petrograpljy......... Qiartzlte .................. Cranberry gneiss .............. Contact and hydrothanoally altered...of the nwrtamorphio rooks ........... Cranberry gneiss ................ Carolina-type rocks .....*........... In por&et 2» Photomicrographs of 0 -Q-B gneiss from *K)Q feet east of the function of !7. S. route...and tho Pluwtree Creek road, Avery Co. and 0 ~B gneiss from Cane Creek Mountain, Mitchell Co. ....... |
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| 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 |
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| beryllium and the crustal Be cycle from migmatite to pegmatite JOSEPH M. EVENSEN*† and DAVID LONDON School of...the final stages of the petrogenesis of granite–pegmatite systems. In combination with reported data on...Metamorphic rocks Pelitic schist Quartzofeldspathic gneiss Amphibolite Mean Be (ppm) Range N Data Source...(Table 1), although the database is skewed toward pegmatite samples that contain abnormally high contents...illustrates the distribution of Be in a schematic pegmatite dike initially Mineral/melt partitioning and |
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| 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...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...addition to lacking verifiability. There are few unnamed spots in Maine. When a specific locality within |
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| 2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series...in 2002 in a calcite-carbonatite vein intruding gneiss, together with very large Baveno-law-twinned crystals...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 |
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| 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!” |
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| 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...long called, simply, the Mogok Series or Mogok Gneiss, now dominating the eastern two-thirds of the Tract |
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| 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 |
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| 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 |
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| 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 |
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| - Photograph of monazite pocket in the Nambe pegmatite, Rio Arriba County . . . . . . 1 6 0 Figure 40...sandstone, vein-type, hydrothermal-vein, and pegmatite deposits scattered throughout the state (Fig....Poleo Sandstone Lentil, Petrified Forest, and an unnamed siltstone member (O'Sullivan, 1974, 1977). These...The Precambrian rocks are a complex of granite, gneiss, diabase dikes, and pegmatites. Additional of ...CK I Ia 0 z sample from a radioactive pegmatite contained 305 ppm (ReidU308 \ and others |
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| 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 |
