 | | Report (issue) | | NORTH CAROLINA DEPARTMENT OF CONSERVATION AND DEVELOPMENT HARGROVE BOWLES, JR., DIRECTOR DIVISION...GEOLOGIST Circular 17 BERYL OCCURRENCES IN NORTH CAROLINA BY WILLIAM F WILSON Ooc RALEIGH 1962 CONTENTS...USESo 8 o . . . BERYLLIUM MINERALS IN NORTH CAROLINA 9 Varieties * o ••••••••.• Mode of Occurrencec...RESOURCES IN NORTH CAROLINA . H OCCURRENCES OF BERYL IN NORTH CAROLINA. 13 Alexander County ...•••••...••.• Ashe County,* ... 0 o * * • o o Burke County* • * • . • . • • • * • • Catawba County* • « . » * |  | | Report (issue) | | NORTH CAROLINA DEPARTMENT OF CONSERVATION WILLIAM DIVISION JASPER P. OF L. SAUNDERS, MINERAL...RESOURCES GEOLOGIST Circular 16 LOCALITIES NORTH OF CAROLINA BY JAMES F. CONLEY Doc NC DENR LIBRARY...... ACKNOWLEDGEMENTS MINERAL COLLECTING IN NORTH CAROLINA , . . . . # . WHERE TO COLLECT f ... f ......THE MINERAL LOCALITIES OF NORTH CAROLINA BY COUNTIES . . ALAMANCE COUNTY 5 5 Pyrophyllite ......... f .......... 5 ALEXANDER COUNTY ................. 7 Emerald, Hiddenite and Associated Minerals |  | | Report (issue) | | .'.' .., Mineral Collecting Sites in North Carolina By W. F. Wilson and B. J. McKenzie RUTILE GUMMITE...Information Circular 24 Mineral Collecting Sites in North Carolina By W. F. Wilson and B. J. McKenzie Raleigh...copies of this publication may be obtained from: North CarOlina Department of Natural Resources and Community...for the general welfare of the citizens of North Carolina. The Section conducts a number of basic and...Geological Survey Section, P. O. Box 27687, Raleigh, North Carolina 27611. Eldon P. Allen, Chief Geologist FRONT | | | Report (issue) | | Information Circular 24 Mineral Collecting Sites in North Carolina By W. F. Wilson and B. J. McKenzie Raleigh...copies of this publication may be obtained from: North Carolina Department of Natural Resources and Community...Geological Survey Section, P. O. Box 27687, Raleigh, North Carolina 27611. Eldon P. Allen, Chief Geologist i ...FRONT COVER PHOTO Twinned emerald crystal from North Carolina, photo from Smithsonian Institution (slide...viable mineral collecting sites through out North Carolina. Some sites are commercially operated during |  | | Report (issue) | | pegmatite in granite, Short Tom Smith mine, Rockingham County, N. C______ ____ ____________________ ...between pegmatite and granite, E. R. Self mine, Gaston County, N. C____________________ 6. Sinuous discordant...wall, Knight mine, Rockingham County, N. C- ~ -7. Sharp hanging-wall contact, Knight mine ______ _______________...of granite underlain by schist, Hawkins mine, Stokes County, N. C _ _ _ _ _ _ __ _ _ __ _ _ _ _ _ 9....and other units in the Big Bess pegmatite, Gaston County, N. C _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ |  | | Report (issue) | | SURVEI PEGMATITE GEOLOGY OF THE SHELBY DISTRICT NORTH CAROLINA by \ Wallace R. Griffitts > \ I ,' -* U...Metamorphic rocks....................... h- Carolina gneiss ..................... Ij- General features... 98 Quartz. ........................ 98 Plagioclase ...................... 101 Microcline. ......district , Worth Carolina. .................... In pocket 3A. Contorted garnet layer in Carolina gneiss * 3B...lens of fine-grained lime- silicate rook from the Carolina gneiss. ............... * k-. Metabasalt with |  | | Journal (article/letter/editorial) | | Haven, CT 06511, USA 2 Lamont-Doherty Geological Observatory, Palisades, NY 10964, USA Received August...Ne#~ =0.5. These equilibria between forsterite-plagioclase-melilite-liquid are not present in the system...boundary curve (fo + di + ne + 1) separates the plagioclase and melilite liquidus fields. The liquidus diagrams...Geology, Arizona State University, Tempe, AZ 85287, USA Offprint requests to. V. Pan equilibria of simple...area of 144 gm 2. Na20 was calibrated against Lake County labradorite, CaO and A1203 against synthetic anorthite |  | Bonechi, Barbara, Perinelli, Cristina, Gaeta, Mario, Tecchiato, Vanni, Fabbrizio, Alessandro (2020) Amphibole growth from a primitive alkaline basalt at 0.8 GPa: Time-dependent compositional evolution, growth rate and competition with clinopyroxene. Lithos, 354. 105272 doi:10.1016/j.lithos.2019.105272 | Journal (article/letter/editorial) | | clinopyroxenes from the Oligo-Miocene cumulates of north-western Sardinia (i.e. Capo Marargiu 49 Volcanic...Ridolfi et al., 2010, 59 2008; Rutherford and Devine, 2008; Rutherford and Hill, 1993; Shane and Smith...the 139 experimental temperature (Hammer and Rutherford, 2002). Using as starting material the 140 ...using the following formula (Hammer 177 and Rutherford, 2002 and reference therein): 178 179 =...(e.g. Cashman, 1993; Hammer, 2008; Hammer and Rutherford, 2002; Iezzi et al., 187 2011; Lofgren, 1983; |  | | Report (chapter) | | floor of the magma chamber. Clinopyroxene and plagioclase joined olivine as liquidus phases nearly simultaneously...uttramafic (60% olivine, 30% clinopyroxene, and 10% plagioclase) cumulates at the base. In contrast, the amount...crustal magma chamber. Initial (basal) cumulus plagioclase in Jabal Dimh is typically in the range An80_88...one sample from a chromite-olivine adcumulate (plagioclase dunite to melatroctolite) near the base of the...single exception, core compositions of cumulus plagioclase from the three stratigraphic sections reported |  | | Journal (article/letter/editorial) | | olivine or clinopyroxene and plagioclase, and oxide grains and plagioclase. Corona growth always proceeds...development in rocks with the most heavily clouded plagioclase. Garnet grows in coronas only in rocks with Fe203/...dominated by the large north-easttrending Tyin-Gjende Fault (Battey, 1965). To the north-west of this fault...the north-west (fig. lc). The dykes from the the nappe (during the Caledonian Orogeny), the north-west...by a suite of thrust sheets, trend just east of north, whilst those dolerite dykes which, although not |  | | Journal (article/letter/editorial) | | of Houston, Central Campus, Houston, Texas 77004, USA Walker and DeLong (1982) present an interesting and... The compositional variation of co-existing plagioclase and olivine in these plutonic rocks is not consistent...compositions of co-crystallizing olivine and plagioclase from several recent 1 atm experimental studies...are for experiments that crystallize olivine, plagioclase, and clinopyroxene (Walker et al. 1979). In the...the other experiments, only olivine and plagioclase are in equilibrium with the liquid (Bender et al |  | | Journal (article/letter/editorial) | | York at Stony Brook, StonyBrook, New York 11794, USA Abstract. Samples of Proterozoic anorthosite complexes...of incorporation of a liquid component by a plagioclase-rich cumulate similar to the adcumulate samples...Colorado School of Mines, Golden, Colorado 80401, USA are not products of fractional crystallization of...been metamorphosed and deformed, whereas those north of the front in the Nain Province are unmetamorphosed...1972). These anorthosites contain intermediate plagioclase, An40-do, and, where original igneous textures |  | | Journal (article/letter/editorial) | | a groundmass made of olivine, clinopyroxene, plagioclase, Ti-magnetite, alkali feldspar and glass [34...Gl glass; Cpx clinopyroxene; Ol Olivine; Plg plagioclase; Ox oxide. TCpxL is the equilibrium Cpx liquidus...and APR16-C1Ac with compositions of Fo86-90 . Plagioclase grains occurring only in the runs APR16-C2Ab...nucleation and growth rate has also been observed for plagioclase crystals in the work of Arzilli et al. [28],...comparing the natural rhyolite of Hammer and Rutherford [23] with the vitrified rhyolite of Mollard et |  | | Journal (article/letter/editorial) | | Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599, U.S.A. Orcid 0000-0002-3111-5885...abundant in several lunar troctolites (olivine-plagioclase rocks), most notably (Figs. 1a–1c) in Apollo...as rounded equant grains enclosed in olivine, plagioclase, or cordierite. Many lunar breccias and regolith...first solid phase to form from melted olivine + plagioclase (Irvine 1974). In many impact melt breccias,... spinel grains are completely enclosed by plagioclase and/or olivine (Figs. 1d and 1e), which is also |  | | Book | | CHAPTER 8 Tennessee 8 7 6 CHAPTER 10 South Carolina ......... _ .......... _ _ .... ____________________............._........... 7 3 6 CHAPTER 9 North Carolina 4 2 3 3 9 6 3 CHAPTER 1 GEM H U N T...g e s w h i c h c r e s t a t M t . N o r t h Carolina, a n d C l i n g m a n ' s Dome, Tennessee. Because...was m e r e l y p a r t o f t h e waste o f t h e mine. W h a t t h e y needed was h i g h grade ore o...n d m 1799 i n Cabarrus C o u n t y, N o r t h Carolina, b y a s m a l l b o y w a l k i n g along a m |  | | Journal (article/letter/editorial) | | NASA, Johnson Space Center, SN2, Houston, TX 77058, USA Received June 28, 1991/Accepted May 6, 1992 Abstract...saturated at one-atmosphere in augite, olivine, and plagioclase, show a strong linear trend in pseudo-quaternary...transitional basalts straddle the normative olivine, plagioclase, and diopside divide between the alkalic and...lavas by Sack et al. (1987) show that olivine, plagioclase, and augite multiple saturation forms a narrow...i n e r als, besides augite, olivine, a n d plagioclase, are n o t considered. Experimental methods |  | | Journal (article/letter/editorial) | | determined effects of high pressure, Labradoritic plagioclase megacrysts, which occur in the early phase of...with the predicted effect of high pressure on plagioclase composition. On the other hand, augites similar...of the liquids temperature, in particular for plagioclase. Seismic and magnetotelluric evidence suggest...activity in the Vestmannaeyjar resumed further north on January 1973 from a fissure on the island of...porphyric and contain 12-20 vol.% olivine, 0-2% plagioclase and minor chromian spinel phenocrysts (Jakobsson |  | | Journal (article/letter/editorial) | | Palm Walk, PSA 213, Tempe, Arizona 85287–1704, USA Department of Earth and Planetary Sciences, Washington...One Brookings Drive, St. Louis, Missouri 63130, USA * Corresponding author. E-mail: axel.wittmann@asu...with Mg-rich olivine, Mg- and Alrich pyroxene, plagioclase, and rare cordierite. Using thermodynamic calculations...and pyroxene, and 1 to 5 lm for analyses of plagioclase and cordierite. Concentrations of the elements...basalt. Up to 1.5 mm fragments of monomineralic plagioclase, pyroxene, and olivine (Fo63 and Fo83–95) dominate |  | | Journal (article/letter/editorial) | | , SEPTEMBER 1981, VOL. 44, PP. 309-14 The plagioclase, forsterite, diopside, liquid equilibrium in...system CaO-Na20-MgO A1203-SiO 2 which crystallize plagioclase and forsterite, often with diopside and sometimes...The movement of the plagioclase-forsterite saturation surface to higher plagioclase contents as albite...temperature of the liquid in equilibrium with plagioclase, diopside, and forsterite decreases as the anorthite...reported for the system albite-diopside forsterite. PLAGIOCLASE, olivine, and augite are common phenocrysts in |  | | Journal (article/letter/editorial) | | Department of Geological Sciences, University of South Carolina, Columbia, South Caroline 29208 2 Department of...(Shervais, 1979a, 1979b; Sinigoi et al, 1983). Plagioclase (An 45 _ 50 ) occurs in the more differentiated...mineral phases which are evolved relative to plagioclase-poor members of the Al-augite suite, with mg-numbers...recrystallized to fine grain sizes (1-2 mm), and plagioclase-rich lenses are flattened parallel to the foliation...crust. Gabbronorites of this group are generally plagioclase rich, with pyroxenite reaction zones ^ 2 cm thick |  | | Report (issue) | | under a cooperative agreement with the State of North Carolina and the Tennessee Valley Authority Physical...under a cooperative agreement with the State of North Carolina and the Tennessee Falley Authority UNITED...Production of sheet and punch mica, 1912-14, in North Carolina, the Southeastern States, and the entire United...data for mica specimens, arranged by lot and by mine or prospect-_-___--_-___-_-.___---___-_____--_ Results..._______________ 13. Test data for mica (not identified by mine), taken from the production line of the Colonial |  | | Journal (article/letter/editorial) | | metagabbros show a subophitic texture with olivine and plagioclase as the major cumulus phases and clinopyroxene...formation of coronas around olivine in contact with plagioclase and recrystallization of clinopyroxene. The igneous...minerals in the amphibolites are hornblende, plagioclase, +_garnet, +_biotite, +_orthopyroxene. Complete...and vein. Abbreviations: Ol = olivine; Plag = plagioclase; Cpx = clinopyroxene; Opx = orthopyroxene; Ilm...METAGABBROSIN THE MODUMCOMPLEX,SOUTHERNNORWAY Olivine, plagioclase, clinopyroxene, _orthopyroxene, ilmenite, +- |  | | Journal (article/letter/editorial) | | orthocumulate diorite, composed of cumulate plagioclase and interstitial ferromagnesian minerals and...monzodioritic rocks. Fractionation was dominated by plagioclase at shallow crustal depths; minor amounts of biotite...biotite may also have fractionated. Albitic plagioclase and K-feldspar were not important fractionating...The Tabbernor Fault System is represented by the north-south-oriented dashed lines. (B) Location of the...Watters (1987), and Janser (1992). 3. Petrography Plagioclase is the dominant mineral in the Star Lake Pluton |  | | Journal (article/letter/editorial) | | liquidus diagrams. If one were to use only the plagioclase-componentprojection, there is the potential for...Abbreviations of phase names: ol : olivine; pl : plagioclase;lpyx : low-Ca pyroxene (either opx : orthopyroxene...comparison in terms of the augite, olivine, and plagioclase liquidus surfaces,respectively.In eachfigure...and the overall differences in the normative plagioclase content of multisaturated liquids among the three...worth mentioning. For example, the ratio of plagioclase to mafic mineral components is greatest for calc-alkaline |  | | Journal (article/letter/editorial) | | Braod Branch Road, N.W, Washington, D.C. 20015, USA and Graduate School of Oceanography, University of...University of Rhode Island, Kingston, Rhode Island 02881, USA 3 Graduate School of Oceanography, University of...of Rhode Island, Kingston, Rhode Island 02881, USA Abstract. Forty lavas from the Azores Islands have...oceanic platform, the Azores Plateau, in the Central North Atlantic near 40 ~ N, 30~ (Fig. 1). The region is...the triple junction of the African, Eurasian, and North American plates. The regional geology and geophysics |
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