 | | Report (issue) | | Mica Deposits of the Blue Ridge in North Carolina GEOLOGICAL SURVEY PROFESSIONAL PAPER 577 Work done...done in part in cooperation with the North Carolina Department of Conservation and Development and in part...Administration Mica Deposits of the Blue Ridge in North Carolina By FRANK G. LESURE GEOLOGICAL SURVEY PROFESSIONAL... Work done in part in cooperation with the North Carolina Department of Conservation and Development... Geologic map of part of the Blue Ridge of North Carolina and Tennessee. 2-6. Maps showing location of |  | Barkov, Andrei Y., Fleet, Michael E., Martin, Robert F., Men'shikov, Yuri P. (2006) Sr-Na-REE titanates of the crichtonite group from a fenitized megaxenolith, Khibina alkaline complex, Kola Peninsula, Russia: first occurrence and implications. European Journal of Mineralogy, 18 (4) 493-502 doi:10.1127/0935-1221/2006/0018-0493 | Journal (article/letter/editorial) | | 1983; Haggerty et al., 1983; Foord & Sharp, 1984; Peterson & Grey, 1995). The structure of these complex...titanates from other localities Garnet Ridge, Arizona, USA (Wang et al., 1999). Landauite from the Burpala alkaline...Creek diatreme complex, Ontario, Canada (Platt & Mitchell, 1996), with Mn-rich varieties of crichtonite...pegmatites at Pegmatite Peak, Montana, USA (Chakhmouradian & Mitchell, 1999). Minerals of the crichtonite...is ordered at the large octahedral site B (M1) (Peterson et al., 1998). It is also noteworthy that all |  | | Report (volume) | | Platte Canyon Quadrangle Colorado By WARREN L. PETERSON CONTRIBUTIONS GEOLOGICAL TO GENERAL SURVEY...PLATTE CANYON QUADRANGLE, COLORADO By WARREN L. PETERSON ABSTRACT The Platte Canyon quadrangle is in Jefferson...strike dominantly westnorthwest and dip steeply north. Dominant lineations plunge steeply northnortheast...1). The quadrangle is accessible from the north by county roads that lead south from U.S. Highway 285...285 and Colorado Highway 124, from the south by a county road that joins Colorado Highway 67, and from the |  | | Journal (article/letter/editorial) | | WARFVINGE, 1988; CASEY et al., 1988; WHITE and PETERSON, 1990). This wide variety of measurement techniques...measurement techniques was conducted by WHITE and PETERSON ( 1990). From literature data, these authors calculated...of surface studies WHITE C. Anbeek 3958 and PETERSON( 1990) found the mean value of X to be 7, regardless...calculated to have X of approximately 20-200 (WHITE and PETERSON, 1990). These relatively high values primarily...hydroxides and mafic minerals in the samples (WHITE and PETERSON, 1990). Values of S from BET-Ar measurements for |  | | Book | | OCCURRENCES2 7 QUIRK LAKE2 7 MACDONALD MINE 2 9 BAPTISTE LAKE NORTH OCCURRENCES 3 1 BURGESS CORUNDUM...LAKE ROADCUT 3 8 DESMONT MINE 3 9 ESSONVILLE ROADCUT4 1 SARANAC MINE (ZIRCON)4 1 SILVER CRATER4...Name Township Most Common Minerals BAPTISTE LAKE NORTH OCCURRENCES Herschel augite, actinolite, feldspar...feldspar, apatite, scapolite, titanite BESSEMER MINE Mayo magnetite, pyrite, pyrrhotite, amphibole, calcite...galena, muscovite, tourmaline, uraninite 23 DESMONT MINE Monmouth clinopyroxene, amphibole, ancylite, apatite |  | | Report (volume) | | Hill. .The pegmatites are composed essentially of perthite, quartz, plagioclase, and muscovite. The common...textural characteristics are usually richer in perthite, albite, muscovite, or quartz. The grain size...pegmatites fracture-filling units of quartz and perthite cut the zones. No replacement units were recognized...Middletown and Portland in Middlesex County; the Glastonbury quadrangle, north of the Middle Haddam quadrangle...quadrangle, extends into 'Hartford County. Access to the district is provided by a close network of hard-surface |  | | Report (issue) | | prospect.____________________________ Etta spodumene mine.______________________________ Geology-___ . __...303 305 305 307 310 312 314 315 Etta spodumene mine Continued Mineral deposits____--__--------------_-_------Eureka...spodumene prospect._________ Hot Shot feldspar and mica mine.. _____ Geology __________-_---_-_-----------__-_-----Mineral...----------------_ 300 Chemical composition of perthite from the Dan Patch pegmatite. _______________...of the albite-quartz-muscovite wall zone at the north and south ends of the crosscuts, Hot Shot pegma |  | | Journal (article/letter/editorial) | | anhedral nepheline ( l-5 mm) and generally euhedral perthite ( l-8 mm) with accessory calcite, titanite, apatite...reequilibration include ubiquitous formation of perthite exsolution textures in the alkali-feldspars, simple...Orthoclase analyses are from the host phase of perthite grains. Albite analyses represent exsolved lamallae...(Stephenson, 1972 ), 2= Coldwell Nepheline Syenite (Mitchell and Platt, 1982), 3=Diamond Jo Nepheline Syenite...(Larsen, 1976), 5 = Coldwell Ferroaugite Syenite (Mitchell and Platt, 1978). 1988). Representative analyses |  | | Report (chapter) | | the South Platte pegmatite district, Jefferson County, Co 1or ado...................................... ABSTRACT The South Platte district, Jefferson County, Colorado, consists of a distinctive cluster of...(rarely present), 4) intermediate zone of microcline-perthite, 5) core-margin zone of green - 1 - fluorite...pegmatites of the South Platte district, Jefferson County, Colorado constitute a distinctive and well-defined...area comprises about 30 square miles in Jefferson County and contains over 50 pegmatites which have been |  | | Journal (issue) | | Mines and Localities BE A PROSPECTOR VISIT OUR MINE-KEEP WHAT YOU FIND DOOR PRIZES HOURLY DEALERS...Some Noteworthy Minerals from Virginia Richard S. Mitchell 230 Mineral and Fossil Collecting Sites in Virginia...Minerals from the Old Sulphur Mine, Louisa County, Virginia Richard S. Mitchell and Arthur S. Katz Peter’s...Displays and Collections in Virginia RichardS. Mitchell An Introduction to VPI’s Museum of Geological...Classified Advertisements VIRGINIA! The Rutherford Mine, Amelia Court House and certainly Mineral, Virginia |  | | Journal (article/letter/editorial) | | Globe-Miami area of Arizona. Detailedgeologicstudiesby Peterson(7, 8, 9, 10) demonstrate that the sequenceof intrusivesfrom...mines: (1) the Copper Cities mine, the northernmost;(2) the Castle Dome mine, the westernmost; and (3) the...and Ca contentof the plagioclase phase of the perthite as well as of any inclusionsof foreign plagioclase...moderate hydrothermalalteration,as outlinedby Peterson,containeda significantly greaterKA1Si808contentthan...CarnegieInst. of Washington Year Book 57, p. 206-209. 7. Peterson,N. P., Gilbert, C. M., and Quick, G. L., 1951 |  | Katzir, Y., Eyal, M., Litvinovsky, B.A., Jahn, B.M., Zanvilevich, A.N., Valley, J.W., Beeri, Y., Pelly, I., Shimshilashvili, E. (2007) Petrogenesis of A-type granites and origin of vertical zoning in the Katharina pluton, Gebel Mussa (Mt. Moses) area, Sinai, Egypt. Lithos, 95 (3) 208-228 doi:10.1016/j.lithos.2006.07.013 | Journal (article/letter/editorial) | | Geophysics, University of Wisconsin, Madison WI53706, USA Received 5 September 2005; accepted 17 July 2006...albite–alkali feldspar (Ab–Afs) granite and an uppermost perthite granite. These two varieties are chemically indistinguishable...caused increase of PH2O in the magma below the perthite granite zone. Owing to the presence of F and Ca...the Neogene the pluton was tilted about 5° to the north and its eastern part was uplifted by ∼ 1 km along...its SW part) consist of perthite granite. The maximum thickness of the perthite granite zone is more than |  | | Report (issue) | | 2-8. Photographs of: 2. Landslide scar on ridge north of Bryant Mountain ___________________________________...Photomicrographs of impure nelsonite of Piney River mine _______________________________ _ Photographs of:...extends some 500 km from central Maryland in the north, where it disappears under metamorphic rocks of...age, southwestward through Virginia and into North Carolina. The gross structure of the Complex is considered...(Calver and Hobbs, 1963). In mapping immediately north of the Roseland district in the Greenfield and Sherando |  | | Report (issue) | | mines and prospects___________________ 60 Addie tin mine._________________________________ 60 Ajax claim...___________60 Aladin mica mine by J. W. Adams____________ 60 Ann mica mine by T. A. Steven_________________...Steven_________________ 61 Antler mica mine.._-___--__--__-___-_-_-___-___ 64 Apex claim.___-__________-_-----_---_--_-____64...No. 2 claims.___________________ 65 Ballard mica mine._____________________________ 65 Beecher Lode by...____________ 83 Burt mica mine by J. W. Adams______-----______ 84 Buster Dike mica mine by J. J. Norton_ _________ |  | | 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) | | ultrahigh-temperature (UHT) rocks in the Khondalite belt, North China craton and its implications Shujuan jiao*...abStract The Paleoproterozoic Khondalite belt in the North China craton preserves evidence for ultrahightemperature...the Khondalite belt. The presence of abundant perthite/mesoperthite in these rocks reflects post-peak...metamorphism is widespread in the Khondalite belt of the North China craton. Our study demonstrates that UHT metamorphism...two-feldspar geothermometer, perthite/ mesoperthite, Paleoproterozoic, Khondalite belt, North China craton introduction |  | | Journal (article/letter/editorial) | | Ivory Coast, and possibly in South America. In North America, tektites were recognized first in 1936...unexplored territory, from Mont Laurier (82 miles due north of Ottawa) northwest to the Abitibi mining district...gold-bearing greenstones (altered lavas), in the north. (1) For the first 20 miles, the highway shows the...Whitlockite occurs in tbe Palermo granite pegmatite near North Groton, New Hampshire, as a late hydrothermal mineral...Gillespite, Feo.Bao.4Sior, in Alaska'and in Mariposa County, California, with sanbornite, BaO'2SiOz, and barium |  | Cameron, Eugene Nathan, Larrabee, David Marcel, McNair, Andrew Hamilton, Page, James Jeffers, Shainin, Vincent Everett, Stewart, Glenn William (1945) Structural and economic characteristics of New England mica deposits. Economic Geology, 40 (6) 369-393 doi:10.2113/gsecongeo.40.6.369 | Journal (article/letter/editorial) | | officialsof thiscompany, especially to Mr. Orrin P. Peterson,New England Manager,,for generouslycontributingmany...singlezoneis intersected by the topographic surfaceor by mine workings,the pegmatitewill appearunzoned. In the...trimming is rarely as much as 10 per cent of the mine-run product,and 4 or 5 per centis considered very...larger) in quantitiesequalto 0.5 per centor moreof the mine-run product. Interestin sheetmica is centeredat...zone; M--sheet-mucovitezone; Q--quartz-plagioclase-perthite zone; O---overburden. centrationsof this type |  | | Report (issue) | | Androscoggin County ______________________ _ Berry feldspar quarry __________________ _ Cumberland County ___...LaChance mines _______________________ _ Oxford County ____________________________ _ Barrett beryl prospect...prospects-Continued Maine-Continued Oxford County-Continued George Elliot mica mine ________________ _ Gogan mica...Johnson mica mine ________________ _ Little Singepole feldspar quarries _________ _ Lobikis mica mine _____________________...Mountain feldspar quarry ______ _ Peaked Hill mica mine _________________ _ Perham feldspar quarry ________________ |  | | Report (issue) | | ____ Districts in Appalachia__________________ North Carolina_____________________ South Carolina_____________________...___________ Ne~ 1:ork_________________________ North Carolina__ _ ________ __ ______ __ Ohio________...Georgia_________________ Deposits in North Carolina__________ Deposits in South Carolina and Virginia____________________________...pinnacles beneath soil cover, Bluegrass, Highland County, Va_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _...transverse joints cutting shale at Poverty, Highland County, V a_ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ |  | | Book (volume) | | instance, a single Spodumene crystal from the Etta Mine near Keystone on the east side of the Mount Rushmore...beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes, stream beds...Hounds in the United States CUSTER COUNTY AREA: The November Mine, 1.2 mi. SE of the Needles Eye Tunnel |  | | Journal (article/letter/editorial) | | Copyright © 1997 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/97 $17.00 + .00 Pergamon...exsolves on a very fine scale (producing a crypto-perthite/mesoperthite/antiperthite for Or-rich/median/Ab-rich...these microtextures are crosscut by veins of patch perthite, some of which are deuteric, whilst others are...1995; Lee and Parsons, 1995, 1997a, b). Perth perthite and Keystone microcline are both perthites which...that they were obtained from pegmatites. Perth perthite comes from Perth, Ontario, Canada and Keystone |  | | Journal (article/letter/editorial) | | of Geosciences, University of Massachusetts, 611 North Pleasant Street, Amherst, Massachusetts, 01003-9297...Ga Kiglapait layered intrusion is located on the north coast of Labrador (Fig. 1), miraculously preserved...online; Morse 2015b) is oval, about 32 km long North to South and 26 km wide, West to East (Fig. 1)....1 km high mountains rising from the sea to the north (the Kiglapait Mountains) and from Medusa Bay to...are located on the map: Sally Lake (SL) to the North, David-Billy (DB) in the middle, and Caplin-Patsy |  | Medig, K.P.R., Thorkelson, D.J., Davis, W.J., Rainbird, R.H., Gibson, H.D., Turner, E.C., Marshall, D.D. (2014) Pinning northeastern Australia to northwestern Laurentia in the Mesoproterozoic. Precambrian Research, 249. 88-99 doi:10.1016/j.precamres.2014.04.018 | Journal (article/letter/editorial) | | magmatic quiescence on Laurentia, known as the North American magmatic gap (NAMG), and abundant magmatism...of the western margin of Laurentia from as far north as Yukon to as far south as Arizona. 1. Introduction...Nunavutia (2.45-2.05 Ga; Torsvik, 2003; Evans and Mitchell, 2011; Pehrsson et al., 2013). The proposed supercontinent...Zhao et al., 2002; Hou et al., 2008; Evans and Mitchell, 2011; Meert, 2012). Rogers and Santosh (2002)...based on a proposed radiating dyke swarm, placed North China us along the margin of western Laurentia |  | | Journal (article/letter/editorial) | | South Platte granite-pegmatitesystem, Jefferson County, Colorado* WM. B. SIMMONS,MAXIE T. LEE and RENEE...exhibit similar concentrations are those in Llano County, Texas and those near bsterby, Ytterby, and Finbo...mining activity which had begun in the mid- 1950s. PETERSON( 1964) mapped the Platte Canyon quadrangle and...quartz monzonite (Fig. 2). The granite consists of perthite, quartz, oIii~clase, biotite, and hornblende,...fluorite. The quartz monzonite contains megacrysts of perthite in a matrix of oligoclase, quartz, biotite, and |
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