 | | 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 (article/letter/editorial) | | probablebatholith are spatiallyassociated with the pegmatite masses.Superposed foldingaffectedthe schists,pegmatiteand... 597 taconltedeposit12 milesnortheast of the pegmatite 599 occurrences.StateHighway28 from Landerand/or...and planar-structured graniticintrusives.The pegmatite Hanleyet al. (1950) describe somein thenearbyOwl... 2 hi. •':":'"'• Cover •::':.•' • • N • Pegmatite &pegmatitic granite Granite Metamorphic Rocks...SouthernWind River Mountains,Wyoming. L,dYERED PEGMATITE$ 597 L x W 7 ,• , 10 small 20 50 100 |  | | Report (issue) | | mine________________ Keene district.__________________________ Beryl Mountain mine.-__-________--_ Chickering...Page Description of pegmatites Continued Raymond district--_________________ General geology.__________-_-_..._--_-. Millard Chandler mine.____--__. Parker Mountain mine._________ Reconnaissance of other areas.____-_...County, N.H. Geologic map and sections of the Beryl Mountain mine, Acworth, Sullivan County, N.H. Geologic...Geologic map and sections of the Chandler mine (pegmatite 7), Raymond, Rockingham County, l\.fl. Geologic |  | | 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 |  | | 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....other rare minerals (e.g., Novák et al., 1992). Pegmatite formation The barren pegmatites were generated |  | 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 |  | | 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...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...location of the mines Holland’s translation, of district, and it could have been Probably these mines |  | | 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 |  | | Journal (article/letter/editorial) | | Triclinic titanite from the Heftetjern granitic pegmatite, Tørdal, southern Norway. Mineralogical Magazine...generally within a few meters of the granite pegmatite body. The granite pegmatites located near Halls...in the area have been the Dunton Pegmatite and the Crooker Pegmatite. The two pegmatites are nearly touching...Maine Pegmatite sheet; to the northwest are the Scotty Pegmatite and the enormous Pegmatite 24, stratigraphically...Pluton and show exocontact effects. The Scotty Pegmatite displays black, flat radial fans of tourmaline |  | | 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 |  | | 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______________________ |  | | 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 (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 |  | | Journal (article/letter/editorial) | | mineralogical composition, while veins and pods of pegmatite range from inches to a few feet in length. (2)...Granite Pegmatite Augengneiss Granite Pegmatite Augengneiss Granit,e Pegmatite Augengneiss Pegmatite Banded...GreJlite Pegmetite Banded Gneiss Granite Granite Pegmatite 24 II 16.8 3.9 6.3 22.3 2.7 13.3 5.1 2 .5 13.2...amphibolite facies. When the sequence gneiss-granite-pegmatite is considered for coexisting rocks, the following...monotonic decrease in the sequence gneiss-granite-pegmatite, with one Notes 1009 exoeption, viz. for the |  | | 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 (volume) | | topographic map of the Punitaqui quicksilver Page district, Coquimbo, Chile___________--____--_________ In...Los Mantos mine, Punitaqui, Chile. _____ In pocket 24. Geologic map of the 330 adit, Los Mantos mine, Punitaqui...Alianza mine and Eegalona prospect in the La Plata district, the Tres Hermanos, Negra, and Caridelaria properties...flasks were shipped by railroad from the Andacollo district in 1918-19, according to Sr. Tomas Whittle,5 and...of the areal and mine geology in the Punitaqui district until Flores was obliged to resume his duties |  | | 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 |  | | Report (volume) | | (A) Manganese deposits of the Serra do Navio district, Territory of Amapd, Brazil, by John Van N. Dorr...Geology and mineral resources of the Maimon-Hatillo district, Dominican Republic, by A. H. Koschmann and Mackenzie...15. Cruzeiro mica mine (Minas Gerais), No. 1 pegmatite, Toquinho workings__________________________________________In...zone in the Borges pegmatite and segregation patches in the Levindo Alfreres pegmatite, Minas Gerais_ _...Geologic map and sections of the Maim6n-Hatillo district, Dominican Republic_________________________________In |  | | Journal (article/letter/editorial) | | 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... 499.8 499.0 502.7 d computed with 22 O 3.085 24 3.097 (O, OH, F) 3.063 3.083 3.074 3.078 3.205 |  | | Report (volume) | | .......... VII XI 1 5 5 10 10 11 12 13 14 16 17 24 26 27 28 29 32 35 39 39 47 53 54 55 56 56 60 61 63...Skeletons of typical dinosaurs of Morrison Formation . 24. Burro Canyon Formation and Dakota Sandstone ......National Monument. Otto's dream came true on May 24, 1911, when President William Howard Taft signed...closely adjacent. These comprised 41 open campsites, 24 rock shelters, 2 small caves, and 8 chipping stations...Adrienne Anderson, Regional Archaeologist, Rocky Mountain Region, National Park Service, Denver; Bruce Rippeteau |  | | 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 |  | | Book | | most spectacular mountain range in the “lower 48” (fig. 1). It is a mighty mountain range, tall and long...world, giving geologists a way to explain why many mountain ranges exist where they do, to make sense out...although similar ones could be constructed for any mountain range. Materials you need in order to use this... . . . . . . . . . . . . . . . . . . . . . Go to 24 24a Rock is soft, punky, and burns smokily in fire...to see an example Large “books” of mica are in pegmatite rock on Kingsbury grade (map 3, 4) Muscovite is |  | | 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 |
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