 | | Journal (article/letter/editorial) | | Minerals of the PACOIMA PEGMATITE Los Angeles County, California Downloaded by [New York University]...attract collectors to this southern California pegmatite. WILLIAM P. MOLLER 627 Grove Lane Santa Barbara...UNUSUALLY LARGE ALLANITE crystals occur in a pegmatite that crops out in Pacoima Canyon only a few miles...found irregularly distributed throughout this pegmatite in pods and lenses of perthite. The crystals are...the west end of the pegmatite exposure. Figure 1. Pacoima Canyon pegmatite outcrops, as viewed from west |  | | Book (volume) | | for gems and gemstones: quartz family minerals, pegmatite crystals, Turquoise, agatized and opalized wood...(b) toward S end of the Pine Nut Mts., area pegmatite outcrops Thulite (pink Zoisite), Topaz; extreme...Silver, Platinum. ELKO COUNTY CARLIN: area pegmatite outcrops in surrounding hillsRose Quartz; nearby...Silver minerals; area gravels, surfaces and outcropsCitrine, Rose Quartz, wonderstone; NW 8 mi....until the 1950’sGold, Lead, Silver; area rock outcropsRose Quartz. This mining dist. was located with |  | | Book (volume) | | Illinois geology. These measures constitute the Upper Carboniferous system of repeated alterations of...fossils. There are no igneous or metamorphic rock outcrops in Indiana. The four great periods of glaciations... FREMONT COUNTY AREA, all Devonian limestone outcrops, gemstone quality⎯fossil corals and stromatoporoids...the Tri-State District, where Kansas, Missouri and Oklahoma join boundaries. This district is interesting... Logan, Trego, and Wallace counties. Regional outcrops of shale disgorge Selenite crystals. ANDERSON |  | | Book (volume) | | Illinois geology. These measures constitute the Upper Carboniferous system of repeated alterations of...fossils. There are no igneous or metamorphic rock outcrops in Indiana. The four great periods of glaciations... FREMONT COUNTY AREA, all Devonian limestone outcrops, gemstone quality⎯fossil corals and stromatoporoids...the Tri-State District, where Kansas, Missouri and Oklahoma join boundaries. This district is interesting... Logan, Trego, and Wallace counties. Regional outcrops of shale disgorge Selenite crystals. ANDERSON |  | | Journal (article/letter/editorial) | | BUTTE PEGMATITE BELT Silver Bow and Jefferson Counties, Montana E618 By R A Y M O N D L A S M A N I...added to my collection from the Butte, Montana Pegmatite Beit. During boyhood days, I took an occa sional...on dis play compare with the best from other pegmatite regions, such as Colorado, New England, etc.)...vugs, introducing in de creasing order: albite, oligoclase, epidote, pyrite, sphene, and—in two single areas...Pohndorf Amethyst Pegmatite. These areas can be clearly located on the Jefferson Ranger District Map, available |  | | Report (volume) | | Bulletin 922-T TIN-BEARING PEGMATITES OF THE TINTON DISTRICT LAWRENCE COUNTY, SOUTH DAKOTA A PRELIMINARY REPORT............. Oligoclase-quartz-muscovlte pegmatite............ Tourmaline-bearing pegmatite and quartz-tourmaline....... Albite-quartz pegmatite.......................... Spodumene-quartz pegmatite...................... lenses................... Mlcrocline-quartz pegmatite...................... Alblte-quartz-muscovite...IV 90. Geologic map and section of the Tinton district, South Dakota................. In pocket 91o Geologic |  | Roza Llera, Ana, Fuertes-Fuente, Mercedes, Cepedal, Antonia, Martin-Izard, Agustín (2019) Barren and Li–Sn–Ta Mineralized Pegmatites from NW Spain (Central Galicia): A Comparative Study of Their Mineralogy, Geochemistry, and Wallrock Metasomatism. Minerals, 9 (12) 739 doi:10.3390/min9120739 | Journal (article/letter/editorial) | | (barren) and Li–Sn–Ta mineralized Presqueira pegmatite are established in this study. K-feldspar and...Li–Sn–Ta mineralized pegmatite. In both barren and mineralized bodies, the pegmatite-derived fluids that...and As. Keywords: wallrock signature; Li–Sn–Ta pegmatite; columbite–tantalite; tantaliferous cassiterite;...on a Li–Sn–Ta mineralized body, the Presqueira pegmatite, which is a non-outcropping body that has been...enriched pegmatites such as trace-elements in major pegmatite-forming minerals and explorationsignatures of |  | | Book (volume) | | although excavations in the underlying black, Upper Devonian (New Albany) shales occasionally produces...colored Vanport flint of the Flint Ridge and the Upper Mercer flint exposed in Hocking, Perry, and Coshocton...also quarried a rough, porous flintstone from outcrops, especially around McArthur, Vinton Co., for making...HOCKING COUNTY AREA exposures throughout Co. of the Upper Mercer horizon, commonly represented by black flint...townships of Decatur, Elizabeth, Perry, Symmes, Upper and Washington, as nodules in limestone exposures⎯flint |  | | Book (volume) | | although excavations in the underlying black, Upper Devonian (New Albany) shales occasionally produces...colored Vanport flint of the Flint Ridge and the Upper Mercer flint exposed in Hocking, Perry, and Coshocton...also quarried a rough, porous flintstone from outcrops, especially around McArthur, Vinton Co., for making...HOCKING COUNTY AREA exposures throughout Co. of the Upper Mercer horizon, commonly represented by black flint...townships of Decatur, Elizabeth, Perry, Symmes, Upper and Washington, as nodules in limestone exposures⎯flint |  | | Report (issue) | | TIN RESOURCES OF THE KINGS MOUNTAIN DISTRICT, NORTH CAROLINA AND SOUTH CAROLINA. By ARTHUR KEITH and...B. STERRETT. INTRODUCTION. The Kings Mountain district, in which the tin ores here described are found...mapped by the United States Geological Survey. The district is almost equally divided between North Carolina...in 1908 and in subsequent years up to 1914. The district has also been examined in detail by Mr. Keith...of the region. GEOGRAPHY. The Kings Mountain district is in the central part of the Piedmont Plateau |  | | Report (chapter) | | area . Lucy pegmatite. Results of the drill program . ..... . .. . . . Artdon pegmatite Subsurface pegmatite..... . . ... . . Molly and Bendum claim s Deer pegmatite , West Hawk Lake. . . . . . . . . . . . . . ....Lake .. ... . . . ... ..... .. . . . . . Beryl pegmatite north of Telford. 7 7 9 9 12 12 12 15 16 17 17...Lake/Cat Lake areas General statement 19 19 Pegmatite dykes in the Pointe du Bois area (Lac du Bois...Lamprey Falls) Lac du Bois pegmatite K-1 pegmatite . Lucky NO.3 pegmatite Pine claim , Winnipeg River |  | | 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 _...deposits _______________________ _ Geology of the pegmatite districts of Maine __ :. . _____ _ Metamorphic...________________________________ _ Geology of the pegmatite districts of New Hampshire_ Rock units ______ |  | | Book (volume) | | Murphrees Valley, as a narrow strip of scattered outcrops about 5 mi. long⎯Manganese minerals. CALHOUN...prehistoric Indians from lead producing areas of the upper Mississippi Valley. Not a county in Alabama but...area⎯Barite. CHEROKEE COUNTY CENTRE, area Miocene outcrops⎯tektites (dark green and dark blue tektites have...of the Louisville and Nashville RR), area pegmatite outcrops⎯Muscovite mica; d SE Region: (a) B.T. Childers...in the United States CLARKE COUNTY AREA, vein outcrops along county roads⎯chert (resembles chalcedony) |  | | Book (volume) | | Murphrees Valley, as a narrow strip of scattered outcrops about 5 mi. long⎯Manganese minerals. CALHOUN...prehistoric Indians from lead producing areas of the upper Mississippi Valley. Not a county in Alabama but...area⎯Barite. CHEROKEE COUNTY CENTRE, area Miocene outcrops⎯tektites (dark green and dark blue tektites have...of the Louisville and Nashville RR), area pegmatite outcrops⎯Muscovite mica; d SE Region: (a) B.T. Childers...in the United States CLARKE COUNTY AREA, vein outcrops along county roads⎯chert (resembles chalcedony) |  | | Book (volume) | | ......................258 Missouri – New Lead District Map .........................................................325 New Jersey – Franklin Mining District Map ............................................Texas – Fluorite in the Terlingua Quicksilver District .................................455 Texas – Sulfur..............502 Vermont – Orange County Copper District Site Map ...................................503...Murphrees Valley, as a narrow strip of scattered outcrops about 5 mi. longManganese minerals. CALHOUN |  | | Book (volume) | | which also produced a most remarkable series of pegmatite dikes ranking with those in Maine and Southern...Hills Dist. Includes both Veins and the extensive pegmatite dike exposures and mines. BON HOMME & CHARLES...Alt. 16 for 15 to 17 mi. (near Rte. 79), pegmatite outcropsRose Quartz; S along US 385 for 32 mi....Co., all regional side rds., look for limestone outcrops and ridgesFairhill agates; in Bull Moose mine...Spodumene, blue-green Tourmaline; Gayle Royal Flush pegmatite, 5.9 mi. SE Amblygonite. FAIRBURN: NW about |  | | 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 |  | | Report (volume) | | similar to the main part of the body. This type of pegmatite is of limited economic value. About 25 percent...center of the pegmatite. As many as five distinct units, or zones, parallel to the pegmatite wall-rock contact...contact have been noted in an individual pegmatite. In some pegmatites fracture-filling units of quartz...mica of the rock. The average beryl content of pegmatite rock in the Middletown area is probably between... extends into 'Hartford County. Access to the district is provided by a close network of hard-surface |  | | Report (issue) | | beds and shale of Triassic (?) and Jurassic age, Upper and Lower Cretaceous sandstones, shales, and limestones...central core of metamorphic rocks, and some of the outcrops form hogbacks with the scarp toward the center...whether to classify the rock as granite or pegmatite. The pegmatite occurs both in the metamorphic rocks and...muscovite mica of commercial value is found in pegmatite. In this rock mica occurs as an accessory mineral...less prominence, the essential constituents of pegmatite being feldspar and quartz. The feldspars are commonly |  | Wise, Michael A., Harmon, Russell S., Curry, Adam, Jennings, Morgan, Grimac, Zach, Khashchevskaya, Daria (2022) Handheld LIBS for Li Exploration: An Example from the Carolina Tin-Spodumene Belt, USA. Minerals, 12 (1) 77 doi:10.3390/min12010077 | Journal (article/letter/editorial) | | in the field at a historically important CTSB pegmatite locality in Gaston County, N.C. in four contexts:...muscovite and rapidly determine the degree of pegmatite fractionation. This study demonstrates the potential...compositional information for pegmatites during a Li pegmatite exploration program. Academic Editor: Paul Alexandre...distribution and face multiple production challenges. Pegmatite deposits (26%) will, therefore, remain an important...alternative process for the generation of some LCT pegmatite populations [10–12]. Granites parental to LCT |  | | Journal (article/letter/editorial) | | characterized by low pressure mineral assemblages of upper greenschist to lower amphibolite facies grades....tourmaline and niobium–tantalum minerals. The pegmatite has affinity for beryl columbite sub-type and ...precipitated from late-stage solutions. Similar pegmatite types were also recognized in Osu, Aramoko and...Cerny and Ercit (2005) recognized five granitic pegmatite classes: abyssal, muscovite, muscovite-rare element...relationship to their parental granites. Each of the pegmatite classes is further divided into sub-classes, types |  | Liu, Chen, Wang, Ru-Cheng, Wu, Fu-Yuan, Xie, Lei, Liu, Xiao-Chi, Li, Xing-Kui, Yang, Lei, Li, Xue-Jiao (2020) Spodumene pegmatites from the Pusila pluton in the higher Himalaya, South Tibet: Lithium mineralization in a highly fractionated leucogranite batholith. Lithos, 358. 105421 doi:10.1016/j.lithos.2020.105421 | Journal (article/letter/editorial) | | granite, albite granite, and pegmatites. Numerous pegmatite dikes have intruded the Higher Himalayan crystalline...highly fractionated pegmatites. The Chomogu No. 1 pegmatite is a well- zoned dike that hosts beryl, columbite...in the Himalayan leucogranite belt. Keywords : Pegmatite, Li mineralization, spodumene, columbite–cassiterite...muscovite granite, albite granite, and granitic pegmatite, which progressively crop out with increasing...altitude of 4700–5100 m, and the albite granite and pegmatite dikes are found at higher altitudes pr (5100–5350 |  | | Book | | . . . . 165 180 182 Chapter 5: RADIOACTIVE PEGMATITE DEPOSITS Geological Characteristics of Pegmatites...thorium, which aTe strongly concentrated in the upper lithosphere, are markedly oxyphile elements occwTing...uranium is dissolved more readily than radium; thus outcrops of radioactive ores rich in pyrite that are weathered...is relatively high, radion1etric assays of such outcrops will be too high as compared to chen1ical assays...(var. cyrtolite). In the Baringer Hill, Texas, pegmatite, Landes ( 1932) noted fissures radiating out 4 |  | | Report (volume) | | dike of pegmatite in schists at Pemaquid Point, Maine; B, Flat-lying or sill-like dike in pegmatite in bed.............................. VII. A, Vertical pegmatite dike intruded along fracture plane in granite...East Glastonbury, Conn.; B, Quartz dike cutting pegmatite at Howe quarry, South Glastonbury, Conn.........with minor quantities of soda feldspar albite or oligoclase (see below) occurring either in separate crystals...offeldspars. Albite................ AbjAn,) to Ab0Ani Oligoclase ............ Ab6An, to Ab3An1 Labradorite. Bytownite |  | | Report (volume) | | ....... Minor quartz monzonite bodies....... Pegmatite......................... Aplite.................Stereogram of the Curecanti pluton. ...... 13. Pegmatite dike intruding biotite gneiss..... 14. Dikes of...Fork. ............................... 18. Craggy outcrops of West Elk Breccia...... 19. Generalized section...including sheer drops of 140 feet and 330 feet at Upper and Lower Falls, respectively. And aside from these...thick masses of black amphibolite, myriads of pegmatite dikes, and broad fault zones. For about 15 miles |
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