 | | Journal (issue) | | support, protect and expand the collection of mineral specimens and to further the recognition of the...and aesthetic value of minerals and collecting mineral specimens. Inside This Issue President’s Message...Chapter Reports 21-22 Best Paper Thank You 22 Mineral Show in Poland 23 Minerals of Western Europe –...– Wrap up (Tucson) 24-25 Tucson Gem and Mineral Show Awards 25 Friends of Mineralogy Tucson Awards 26...and a Request 26-27 Message from the Editor 27 Mineral Hill Field Trip Report 28-30 Fluorite (Dodecahedron) |  | | Report (issue) | | DESCRIPTIVE MINERALOGY OF PENNSYLVANIA 104 Na 2Al 2 Si3 Oi .2H 2 O; SiO 2 47.4, A1 2 O 3 26.8, Na...Na 2 O 16.3, Lenni, Delaware County. Crystals. Eyerman, 1911, 11. Composition: Analysis: Fe 2 O3 CaO...Sp.gr LOCALITIES: Berks County: Birdsboro, and Gickerville; Delaware County: Leiperville, Lenni (druses... Felton's farm (Chester), and Ward's quarry; Montgomery County: Sumneytown, and Perkiomenville ; Philadelphia:...Philadelphia: Fairmount Park, Frankford, and Rit- enhouse quarry. SCOLECITE CaAl 2 Si3 Oi .3H 2 O MONOCLINIC |  | | Report (volume) | | THE HONEYBKOOK AND PHOENIXVILLE QUADBANGLES, PENNSYLVANIA BY F. BASCOM AND G. W. STOSE UNITED STATES...-____ 28 Serpentine, metapyroxenite, and metaperidotite.__--__ . 29 Gabbro....__..__.---...._________...____ 80 80 81 82 86 87 90 94 95 96 96 97 99 Mineral resources___________--___---___--__----------_-_-__-_____...quadrangles, Pa_ ________ In pocket 2. A., Thomas Hill viewed from the east; B, Lamellar injection of...quadrangles___-___---_-_-__ 7. Map of southeastern Pennsylvania showing relation of Honeybrook uplift to South |  | | Journal (article/letter/editorial) | | (289) 290 F. BASCOM— PIEDMONT DISTRICT OF PENNSYLVANIA Page Igneous rocks.................. ........Geologic history o f the Piedmont district o f Pennsylvania.................................. 322 Résumé...R E L A T I O N S The Piedm ont district of Pennsylvania, forming with a width of 65 miles the southeast...New York, and in New England. The valley of the Delaware is the southeast boundary of this belt. From this...crest, from which the relatively flat slope to the Delaware can be surveyed. Downloaded from https://pubs |  | | Report (volume) | | DIRECTOR BULLETIN 420 ECONOMIC GEOLOGY OF THE FELDSPAR DEPOSITS OF THE UNITED STATES BY EDSON S. BASTIN........ *...................... Minerals of the feldspar deposits............."........................................................... Androscoggin County............................................. Auburn......................................... Lincoln County ............................................................-...:.....-................. Oxford County........................;...................... |  | | Journal (article/letter/editorial) | | and authors mentioned in the 3oth List of new mineral names are not included in this Index, nor are the...AHMED (A.) and LEAKE (B. E.), The Inishdawros metaperidotite, Connemara, Ireland, 69 AHMED (Z.), Chromite...copper mine, W. Australia, lavendulan, 369 Alkali feldspar, Greenland, solvus, exsolution, coherent intergrowth...Alkaline-earths and alkalis, partition between alkali feldspar phenocrysts and lava matrix, 63 Allanite, Andhra...minerals, 4th supplementary list of, I69 Broken Hill, New South Wales, ilvaite, rhodonite, hydrogrossular |  | | Journal (issue) | | Virginia Published quarterly by the DIVISION OF MINERAL RESOURCES Natural ResourcesBuilding, McCormick...BLUE RIDGE Stephen W. Kline, Arkansas Mining & Mineral Resources Research Institute, Arkansas Tech University...pseudoby Ho{1/atd (1981) on a geologic map of Loudoun County, morphic after magmatic phases. Rock types include...designated simply as ultramafic rocks. During metaperidotite (serpentinite), hornblende metapyroxenite,...geology of Loudoun County (Burton and others, 1992). morphic chlorite in the metaperidotite and metapyroxenite |  | | Journal (article/letter/editorial) | | east-westtrending, half mile to onemile wide zoneof metaperidotite, metasedimentary gneiss and greenstoneseparatesgranitic...DEVELOPMENT THE MarbridgeMine is situatedin La Motte township,range5, lot 9, about 15 miles north of the town...s neara broadZ-type deflectionin a belt of metaperidotite extendingapproximately12 mileswestand 15 to...metasedimentary gneiss, andgreenstone in addition to metaperidotite. This intercalated mixtureappears to havebeensqueezed...principalrocksare acidicvolcanics,metasedimentarygneiss,metaperidotite,and metagabbro. Their relative agesare obscurebeyondthe |  | | Journal (issue) | | Virginia Virginia Minerals Published by Division of Mineral Resources Charlottesville, Virginia 22903 VOL... NO. 2/3 A GUIDE TO THE EDUCATIONAL ROCK AND MINERAL GARDEN: SAMPLES OF VIRGINIA’S GEOLOGICAL DIVERSITY...metamorphic, and sedimentary. The Educational Rock and Mineral Garden was designed to display a portion of Virginia’s...and mineral garden at the Division of Mineral Resources offices. 10 VIRGINIA DIVISION OF MINERAL RESOURCES...locations of specimens in the Educational Rock and Mineral Garden. BUILDING 25 18 24 13 14 11 45 42 |  | | Report (issue) | | uscovite schist from west of phenix, Charlotte County; B, Biotite-muscovite schist from northwest of...from Crane Creek; south of Hixburg, Appomattox County; B, Columbia granite near Cub Creek, east of Red...Kyanite quartzite from Baker Mountain, prince Edward County*__ I Massive kyanite in kyanite-bearing pegmatite...kyanite-bearing rock on Ridge Mountain, Buckingham County; B, Melrose granite, east of McKeever ferry, on...rock at top of Baker Mountain, Prince Edward County 40 11. A, Experimental concentrating mill, Mclanahan-Watkins |  | | Journal (article/letter/editorial) | | epidote, hornblende, diopsite, 427 Cheesewring quarry, Linkinhorne, danburite, 171; durangite, I72 Chycornish...Crowns Rock, St. Just, Land's End, garnet, 427 Dean quarry, The Lizard, djurle'ite, I72; analcime, adularia...penwithite (= neotocite), 279 and M26 Devon Meldon quarry, Okehampton, greenovite, 172; priceite, 175 Ramsley...Cannington Park quarry, djurlei'te, I72 Combe Farm quarry, Henbury, wulfenite, 298 Merehead quarry, Shepton...Inishdawros, Callow, Ballyconneely, Connemara, metaperidotite, olivine, serpentine, orthopyroxene, augite |  | | Report (issue) | | within the Coastal Plain of Virginia, Maryland, Delaware, New Jersey, and New York for which granitic sources...Virginia (Zietz and others, 1977), and Maryland, Delaware, and New Jersey (Zietz and others, 1980b). The...and Froelich (1977), Cleaves and others (1968), Delaware Geological Survey (1976), Lyttle and Epstein (in...Churchland in North Carolina; the Winnsboro-Rion, Liberty Hill, Pageland and Lowrys in South Carolina; the Siloam...Farrar, widely distributed relict granulite facies mineral assemblages. The rocks of this terrane are deformed |  | | Report (issue) | | GEOLOGICAL SURVEY Geologic map of the Loudoun County portion of the Middleburg quadrangle, Virginia...accompanies J~~" Prepared in cooperation with Loudoun County Department of Natural Resources This report is...endorsement by the U.S. Government or the Loudoun County Department of Natural Resources. George Mason University...Mountain Estates (south of map area in Prince William County. Gravel comprises rounded quartzite, chert, vein...in origin. Dinosaur tracks have been found at a quarry in red-brown sandstone and siltstone near the middle |  | | Journal (article/letter/editorial) | | Cordierite-bearing pelitic schists and gneisses carry an early mineral assemblage of biotite + garnet + plagioclase +...in plagioclase. Textural relations between, and mineral chemistries of. ferro-magnesian phases in these...conditions during the development of the early mineral assemblage in the pelitic gneisses are estimated...the subsequent development of cordieritebearing mineral assemblages in the pelitic gneisses are estimated...MKUKE G R O U P Kauna Unit Monometamorphic Metaperidotite (foliated tremolite serpentinite; originally |  | | Journal (article/letter/editorial) | | southwestern Finland. One of them, the Sääksjärvi metaperidotite-metagabbro complex, has been studied to gain...amphibole-dominated assemblages comprising: (1) in metaperidotite—olivine + magnesian hornblende ± chromite ±...intrusions of the VNB in southwestern Finland. Mineral compositional data have been provided elsewhere...tions, new data on the petrofabric, and some new mineral analyses are presented and inter preted for the...a small-scale fracture. D. S2 foliation in metaperidotite near the contact. setting, lithological associations |  | | Journal (article/letter/editorial) | | soapstone is associated; that is, the metagabbro-metaperidotite groupof basicintrusives. BLUE RIDGE PROVINCE...Granite Quartz Diorite Metagabbro-metaperidotite Metagabbro-metaperidotite group group PRECA•BRXA,• Catoctin...Aporhyolite Gneiss DISTRIBUTION. Talc is a mineral of wide distribution. It occursin smallquantities...so-calledAlbemarleNelson county belt, which extends from Madison county to Grayson county, a distance' of morethan2o...secondin productionin the State, with Franklin county,becauseof the depositat Henry, third. Other de |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petrol (1986) 94:12-28 9 Springer-Verlag1986 ...AJ-20, University of Washington, Seattle, WA 98195, USA Abstract. The Big Jim complex is a concentrically...enclose harzburgite and metaperidotite xenoliths similar to foliated metaperidotite lenses included in the...metaserpentinites, as indicated by their simple mineral assemblages and "jackstraw texture" (Evans and...the batholith, often in direct contact with metaperidotite (Plummer 1969; Pongsapich 1974; Frost 1976; |  | SUTHERLAND, F. L., HOLLIS, J. D., BIRCH, W. D., POGSON, R. E., RAYNOR, L. R. (2004) Cumulate-rich xenolith suite in Late Cenozoic basaltic eruptives, Hepburn Lagoon, Newlyn, in relation to western Victorian lithosphere*. Australian Journal of Earth Sciences, 51 (3). 319-337 doi:10.1111/j.1400-0952.2004.01060.x | Journal (article/letter/editorial) | | (), sample sites (stars), and shoreline heavy-mineral gem sand (····), in relation to drainage and topography...prominent composite cones (Kangaroo Hill West, 678 m asl; and Kangaroo Hill East, 640 m asl) lying to the north...rocks contrasts with the more heterogeneous metaperidotite and metapyroxenite ( garnet, amphibole, mica)...mica) and wehrlite suites from Anakie Eastern Hill, Bullenmerri–Gnotuk maars, Mt Leura, and elsewhere...Stolz & Davies 1988; Nicholls et al. 1993). Heavy mineral suite Sandy beaches on the north side of Hepburn |  | Säntti, Jaakko, Kontinen, Asko, Sorjonen-Ward, Peter, Johanson, Bo, Pakkanen, Lassi (2006) Metamorphism and Chromite in Serpentinized and Carbonate-Silica-Altered Peridotites of the Paleoproterozoic Outokumpu-Jormua Ophiolite Belt, eastern Finland. International Geology Review, 48 (6) 494-546 doi:10.2747/0020-6814.48.6.494 | Journal (article/letter/editorial) | | so information concerning their primary igneous mineral assemblages and textures and chemical and isotopic...studies have argued for the preservation of primary mineral assemblages, field and petrographic evidence presented...implications for ore formation as well. Equilibrium mineral assemblages in the interior parts of the ultramafic...system MgO–SiO2–H2O–CO2, they yield a variety of mineral assemblages that are useful in characterizing the...ultramafic rocks. Because it is also a relatively inert mineral during metamorphism, chromite textures and compositions |  | | Journal (article/letter/editorial) | | igneous bodies possibly containing primary igneous mineral assemblages. This hypothesis is reviewed in all...the distinguishing of igneous from metamorphic mineral assemblages, the interpretation of the geochemistry...disrupted layered igneous intrusions in which mineral layering, current, and wedge bedding of igneous...distinction between primary igneous and metamorphic mineral assemblages. (iv) The interpretation of the geochemistry...area mapped by Bowes et ah (1964, fig. 2) as metaperidotite. Further east, where the lower margin of the |  | | Journal (article/letter/editorial) | | Chicago, 5734 South Ellis Avenue, Chicago, IL 60637, USA. Tel.: +1 773 834 3997; fax: +1 773 702 9505. E-mail...combustion of the samples (either as separate mineral or rock powder) in tubes sealed under vacuum, followed...temperature treatment (e.g. muscovite, biotite, feldspar). The efficiency of extraction of N fixed in minerals...(~ 3.7x). This sample, labelled ETF-7, is a metaperidotite from the Erro–Tobbio massif (western Alps)...(metasediments, metagabbro, altered basalt and metaperidotite). The sample weights range from 0.68 to 49 |  | | Report (issue) | | DIVISION OF MINERAL RESOURCES JASPER L. STUCKEY, STATE GEOLOGIST BULLETIN NUMBER 62 Feldspar Deposits...DIVISION OF MINERAL RESOURCES JASPER L. STUCKEY, State Geologist BULLETIN NUMBER 62 Feldspar Deposits..... Burlington Zebulon -Chapel Hill P. LATHAM Belhaven Chapel Hill MRS. ROLAND MCCLAMROCH J. C. MURDOCK...Troutmans W. LOCKE ROBINSON ERIC Durham Mars Hill W. RODGERS Scotland Neck GEORGE R. ROSS, Director...herewith manuscript for publication as Bulletin 62, "Feldspar Deposits of the Bryson City District, North Carolina |  | | Journal (article/letter/editorial) | | on the scale of a few centimetres. Where a metaperidotite contact can be observed, as inland from the...first inlet west of Pairc a' Cladaich, the metaperidotite shows no systematic variation away from the...corresponds with country rock unconnected with metaperidotite or garnet-pyriclasite which occurs in many...WRIGHT (, PARK (1964) ; JJ UNPUBLISHED M P METAPERIDOTITE C P CARNET-PYRICLASITE M A META-ANORTHOSITE...5), a trend which bears no relation to the metaperidotite-garnet-pyriclasite-anorthosite fields of composition |  | | Journal (article/letter/editorial) | | Ga Sii/iksjfirvi ultramafic body, comprising metaperidotite and subordinate amphibolite, is hosted by multiply...Prograde peak metamorphic (M2) mineral assemblages in the metaperidotite comprise olivine + Ca-amphibole...chrome spinel (A1203 = 21 to 30 wt%) in the metaperidotite. The amphibolite comprises calcic amphibole...from spinel-olivine Fe-Mg exchange data in metaperidotite. The range of temperatures is equally consistent...high-temperature M2, or with a discrete M 3 event. In the metaperidotite, porphyroblastic amphibole (M2) partly recrystallized |  | | Report (volume) | | Geology of the Lake Mary Quadrangle Iron County, Michigan By RICHARD W. BAYLEY GEOLOGICAL SURVEY... 1919Geology of the Lake Mary quadrangle, Iron County, Michigan. Washington, U. S. Govt. Print. Off....p. 108--110. 1. Geology-Michigan-Iron Co. Iron County, Michigan. (Series) QE75.B9 no. 1077 ----Copy...Lake Mary quadrangle, Iron County, and adjacent area in Dickinson County, Mich. 3. Magnetic survey of...and sees. 6-8 and 16-18, T. 42 N., R. 31 W., Iron County, Mich. 4. Magnetic survey in parts of sees. 19 |
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