 | | Journal (issue) | | The Minerals of Halls Ridge and Pluntbago-Puzzle Mountain Newry, Oxford Count , Maine Van King PO Box 90888...exposed at the surface of the current Dunton Pegmatite in 1898 (watermelon tourmaline was not actually...although almost all species are from granite pegmatite. Many additional names have been proposed for...in the Penrose Branch of the Pikes Peak Library District (PPLD), in Colorado Springs, Colorado. (See Exhibit...1975. 1980). The Dunton Pegmatite hosts the Dunton Quarry. The Crooker Pegmatite hosts the Crooker Prospect |  | Feng, Yonggang, Liang, Ting, Zhang, Ze, Wang, Yiqian, Zhou, Yi, Yang, Xiuqing, Gao, Jinggang, Wang, Hui, Ding, Kun (2019) Columbite U-Pb Geochronology of Kalu’an Lithium Pegmatites in Northern Xinjiang, China: Implications for Genesis and Emplacement History of Rare-Element Pegmatites. Minerals, 9 (8) 456 doi:10.3390/min9080456 | Journal (article/letter/editorial) | | Published: 25 July 2019 Abstract: The Kalu’an-Azubai pegmatite field, one of the most important rare-metal metallogenic...regions in China, contains a large number of pegmatite dikes belonging to spodumene and lepidolite subtypes...were three emplacement events of the Li-rich pegmatite-forming melts in a timeframe of ~30 Ma. In combination...dating; Li pegmatite; Kalu’an; Chinese Altay orogen 1. Introduction The Kalu’an-Azubai pegmatite field,...Chinese Altay orogen, is one of the most important pegmatite fields for rare element (Li, Be, Nb, and Ta) resources |  | | 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 ___ |  | | Report (issue) | | rocks. _ _______________________________ Aplite-pegmatite stage. _ _----------- .---.____ Quartz stage....21 21 21 21 21 22 22 22 22 22 22 22 23 23 23 23 24 24 24 26 Page Genetic history of the copper-bearing...solid constituents_____-_-_,__--__---__ Aplite-pegmatite stage__-___-___---_-._____ Quartz stage_-_----____-________-_---...constituents.__________________________ . Aplite-pegmatite stage..._----------._-_-_. 50 50 51 51 51 51...Wall rock____--_---_--_---___-_ _______ Aplite-pegmatite stage. ________________ Vein-quartz stage______________________ |  | | Journal (article/letter/editorial) | | pegmatites, or on subsolidus tourmaline developed in pegmatite dikes or in their exocontacts. This paper deals...chemical changes in tourmaline during granitic pegmatite evolution. The samples examined were selected...eastern Bohemia) are subdivided into several pegmatite types and subtypes (see, e.g., Novák et al., 1992;...graphic and blocky units is rare. Most of the pegmatite bodies are homogeneous; open vugs are absent....löllingite, almandine » spessartine, monazite-(Ce), zircon and xenotime-(Y) are found as common to rare accessory |  | | Book (volume) | | smaller than Oxford County in Murmansk Ob last, Kola Peninsula, Russia, has perhaps as many as 15-20%...California, is arguably the most important gem-pegmatite district in North America. Its wealth of tourmalines...and superior to any from Madagascar, Afghanistan, Russia, or Brazil. Certainly, only the best Maine gemstones...Pala, California better than those from Black Mountain in Rumford, Maine? Are the cassiterite crystals...Mine in Topsham: both are small open pits in pegmatite. Morrill et al. (l 958) relieves the problem by |  | | Report (volume) | | 4O7 GEOLOGY AND ORE DEPOSITS OF THE BULLFROG DISTRICT, NEVADA BY F. L. RANSOME, W. H. EMMONS AND G...calcite schist.................................... Pegmatite and quartz veins........................................... Quartz-biotite injection schist, pegmatite, and augengneiss... Quartz schist and quartzite............................. 20 21 21 22 23 23 23 24 25 25 25 26 26 27 27 29 29 29 29 31 32 32 32 32 33.................................... 75 Bullfrog Mountain fault.................................... 75 Montgomery-Shoshone |  | | Book | | Modern Europe Lapidaries, 24 Early Lapidaries, Speculum Lapidum, Occult 24 Agricola’s 27 Love and...Austria, Vision and Diseases of the Epilepsy, 124 Russia, 73 132 Portugal, 134 England, 134 United...then ruby, Lore and 1879). cat’s-eye, pearl, zircon, coral, soberyl, garnet, carnelian, quartz, and...impossibility smaragdoi (emeralds), his real on 24 the second modern translation of the on degree...more km) from Coptos passed center for these district, correspond cites a King to the are to Bostock |  | | Journal (volume) | | near or at the contacts of granite plutons. The pegmatite dykes and lenses are generally parallel to the...plagioclases were analysed from the pegmatite deposits. Key words: pegmatite, minerals, phosphates, viitaniemiite... ... 22 Mineral parageneses of the pegmatites 24 Mineral descriptions ....... . ............ . ...... References Appendix 1: The directions of pegmatite dykes and tectonics in the Eräjärvi area Appendix...extracted. The first pegmatite deposit of economic importance in the area, the Juurakko pegmatite, was reported |  | | Report (issue) | | ......... Pegmatite 12-B (Big Spar No. 1 mine).... Plagioclase-quartz-tourmaline pegmatite (wall zone)...Plagioclase-quartz-perthite pegmatite (intermediate zone).... Quartz- perthite- plagioc la s e pegmatite (core) ................. Pegmatite 14 .......................... Quartz-plagioclase-muscovite pegmatite (border zone)...Plagioclase-quartz-perthite pegmatite (wall zone) ............ Perthite- plagioc lase-quartz pegmatite (core) ........prospects Continued Pegmatite 24 ......................... Plagioclase-quartz-perthite pegmatite (border and |  | | Report (volume) | | and -Ore Deposits of the : Willow Creek Mining District, Alaska GEOLOGICAL SURVEY BULLETIN 1004 Geology... Geology and Ore Deposits of the Willow Creek Mining District, Alaska By RICHARD G. RAY GEOLOGICAL SURVEY...general and economic geology of a lode gold mining district in southern Alaska, with particular emphasis on...Aplite_____-_----------_---_-----.-------.---------Pegmatite. ___________________________________________ Sedimentary...______ 14 14 15 15 16 17 18 19 20 20 20 21 23 24 24 25 25 25 27 27 27 29 30 32 35 35 37 37 37 37 37 |  | | Book | | hydrothermal, carbonatite, contact-metasomatic,pegmatite and sublimate deposits. The laws governing the...texture· Granite is a plutonio rock rich in quartz and 24 feldspar. Because of its strength, durability and...pressure in the magma up to a maximum at which the pegmatite minerals crystallize. The pressure of volatile...centimetres broad rim around the pegmatite vein. The graphic pegmatite 50 100% 100% pressure adjacent to...grain size < 1 cm) passes inwards into block pegmatite with miFig. 2 crocline crystals up to more than |  | | Journal (article/letter/editorial) | | lase-biotite-hornblende, with minor amounts of zircon, apatite, ilmenite, sphene, magnetite, allanite...Fractionation in Granites Table 1. Analyses and formulae (24 O, OH, F) of biotites. Analyst J. Cotten; mineral...Syenogranite 14 Transition 16 18 20 21 22 Pegmatite 24 36.05 3.31 14.13 3.96 21.05 0.29 8.52 0.23...parameters and densities of biotites I 2 6 20 22 24 aA + 0.003 5.321 5.352 5.374 5.352 5.355 5...of Fe/(Fe+ Mg)(Wones, 1963). Biotite (no. 24) from a pegmatite has a singular unit cell. Biotites cA |  | | Book | | 139. World Wild Fund for Nature, photographs on ps 24; 27; 46 Similarly I was encouraged by my colleagues...down in the crust. Other rock types are from old mountain chains or old volcanoes. Some of the rocks formed...magmatic events (after Kampunzu & Popoff, 1991) 24 northwestern Africa. Alkaline and calc-alkaline... Major pegmatites are common, e. g. the Khan Pegmatite of Namibia, as are post-tectonic dolerite dykes...absent, except for the Late Ordovician of the Table Mountain Group, where articulate brachiopods and trilobites |  | | Report (volume) | | Petrology of the Volcanic Rocks of the TGng-Yiieh District. By R. C. Burton, B. Sc., F.G.S., Assistant Superin¬...VOLUME XLIII PLATE 1.-*Sketch Map of part of Tavoy District. PLATE 3.—Cassitorito Wolframite Lode. PLATE 3...of Wolframite Lodes and Depo¬ sits In the Tavoy District of Lower Burma. By A. W. G. Bleeck, Ph.D., F.G...over 33 Mr. Foote joined the Geological Survey of 24 and retired in 1891 after a service years. The greater...M. Fox. asbestos from Seraikela, Singhbhum district; presented by the Rajah Bahadur of Seraikela |
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Pegmatite №24, Vavnbed Mountain, Lovozersky District, Murmansk Oblast, Russia