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| 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 |
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| 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 |
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| pans. Many other gem crystal species occur in pegmatite exposures, such as Aquamarine, Beryl, some Ruby-red...areaAlmandite garnet; (g) harmony Church, area pegmatite outcropsBeryl; (h) Hickory Flat, 2 mi. NE on rd....mi. region surrounding this town contains many pegmatite dike minesMica minerals, Quartz crystals, Aquamarine...smoky). ATLANTA, Emory University, area pegmatite outcropsQuartz crystals (clear, BARNESVILLE, THOMASTON...NW of the Covington hwy. on the Philips rd., a pegmatitegreen Muscovite, Feldspar, Quartz. STONE MOUNTAIN: |
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| 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) |
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| 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) |
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| 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 |
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| ......................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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Embilipitiya, in the Ratnapura District—the most famous gem district in Sri Lanka. Very soon these stones...characterized by calcic rocks and isolated pegmatite outcrops. It is these pegmatites that are significant...relation to the gem occurrence at Kolonne. T h e pegmatite outcrops are large and isolated a n d consist of large...inches. It is from the periphery of these pegmatite outcrops (where a fair a m o u n t of weathering a...resorted to. T h e occurrence of isolated pegmatite outcrops too call for an answer—its answer ties u |
 | 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 |
 | | 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 |
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| 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 |
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| evidence for strong thermal events of lower to upper Paleozoic ages. The stratigraphical age of these...Metamorphism reached amphibolite-facies grade. (ii) an upper "Marvejols Supergroup", mainly characterized by...and pseudotachylites occur at the bottom of the upper supergroup (Faure et al. 1979). These mylonites...associated with eclogitic rocks, pressureshadow pegmatite) have been sampled and analysed by means of the...slightly discordant, defining a straight line with an upper Concordia intercept of 478_+ 6 Ma. The degree of |
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| these minerals which I obtained in 1936. The pegmatite from which they came is the old, classic locality...early days was conducted on an exposure of pegmatite on the upper flank of the mountain forming the northeast...of 50 feet along the strike, on a 25orise; the upper is 25 ieet long, heading diagonally towards the...ft. to the southeast. All of this work is in pegmatite, but the exposuresare insufficient to indicate...apart, and, as far as could be learned, no pegmatite outcrops have been located in the intervening section |
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| Corps Base CA Blue Mine X Yucca Valley Gem Pegmatite Landers Joshua tree MICHAEL P. HUNERLACH 148...significant gem-bearing pegmatite north of the well-known Southern California gem pegmatite fields. Early in...Desert area. Dave’s locality, the California Blue pegmatite, Downloaded by [Heriot-Watt University] at 15:13...to dig into the deposit and better expose the pegmatite. To my surprise, Dave was a “human gopher” (fig...and exposed more than 200 linear meters of the pegmatite. Hand-excavations were far enough into the hillside |
 | | Report (issue) |
| museum began paleontologic fieldwork in Madagascar (upper Permian fauna and Jurassic and Cretaceous saurians...collection at the Kristallmuseum in Riedenburg, Germany The current status of these studies is presented...Annandale, VA Dr. Gi.inther A. Neumeier, Munich, Germany Dr. William B. Simmons, New Orleans, LA Gloria...CT Layout Designer Maximilian Glas, Starnberg, Germany Licensed edition in the English language of Lithographer...Schottenheim Munich, Germany with the permission of Christian Weise Verlag, Munich, Germany © 2001 by Lapis |
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| the Pima mining district on the east side of the range and the Papago mining district on the west side...the potential for copper deposits, not on the pegmatite areas, and thus were not helpful. The only factual...white quartz float (indicating a decomposing pegmatite) while covering as much ground as possible. This...the lower reaches of the mountains produced the pegmatite swarms that contained the aquamarine we have found...Peak Granite in Colorado (where I had learned pegmatite collecting), those in the Sierritas have no vugs |
 | 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 |
 | Küster, Dirk, Romer, Rolf L., Tolessa, Dandena, Zerihun, Desta, Bheemalingeswara, K., Melcher, Frank, Oberthür, Thomas (2009) The Kenticha rare-element pegmatite, Ethiopia: internal differentiation, U–Pb age and Ta mineralization. Mineralium Deposita, 44 (7) 723-750 doi:10.1007/s00126-009-0240-8 | Journal (article/letter/editorial) |
| 1007/s00126-009-0240-8 ARTICLE The Kenticha rare-element pegmatite, Ethiopia: internal differentiation, U–Pb age...Springer-Verlag 2009 Abstract The Kenticha rare-element pegmatite, a globally important tantalite source in the...corresponds to the spodumene subtype of the rareelement pegmatite class and belongs to the lithium–cesium– tantalum...tantalum petrogenetic family. The Kenticha pegmatite is asymmetrically zoned from bottom to top into granitic...spodumene-bearing upper zone. A monomineralic quartz unit is discontinuously developed within the upper zone. Whole-rock |
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| 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.)...Pohndorf Amethyst Pegmatite. These areas can be clearly located on the Jefferson Ranger District Map, available...tracks turn south, there are pegmatite outcrops on the hillside. These outcrops contain abundant large microcline |
 | | 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 |
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| • An unique mineral suite in a syenite pegmatite at Virikkollen, Sandefjord, Larvik Plutonic Complex...Introduction In April 2010, a cavity in a small syenite pegmatite dike was discovered at Virikkollen, Sandefjord...all belonging to the hydrothermal stage of the pegmatite formation, have so far been identified from the...this cavity. Regional geology The Virikkollen pegmatite belongs to the Larvik Plutonic Complex (LPC) which...(Br0gger 1890, Larsen et al. 2010). The Virikkollen pegmatite is situated within the pluton IV and thus in an |
