72 EXCHANGES OFFERED Thtr MINERAL COLLECTORS

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72 EXCHANGES OFFERED Thtr MINERAL COLLECTORS

72 THE AMENICAN MINERALOGIST EXCHANGESOFFERED Erchange notices will be prirted free of charge to our subgiben in this colun. Goods for sale must bo ofrered in tbe advertisiug colru' 'W, Scott Lewis, 3493 Eagle St., Los Angeles, Cal. Desert jasper, chal- cedony (fine for cutting); rare forms of petrified wood' asphaltum from La Brea fossil beds; shell linestone; biotite, aDd miscellaneoue common minerals. IVm. II. Broadwell, 571 Eawthorne Ave.' Newark, N' J' New Jerse.y zeolites (Apophyllite, laumontite, natrolite, pectolite' prehnite, etc'); thaumasite, babingtonite; rhodonite, franklinite, zincite, etc' List oent upon apPlication' W. G. Levison, 1435 Pacific St., Brooklyn, N. Y', will exchange fine speci- mens of New Jersey minerals or some duplicate numbers of the Min- eral Collector, for any parts of the Proceedings of the Lyceum of Natural History of N. Y., Series 1 and 2' or eny parts of Vols' 1' 2 and 3 of the Annals of the N. Y' Acad' of Sciences' B. C. Beegle, 52 Chadwick Ave., Newark, N. J. Apophyllite, thaumasite, prehnite, stilbite, red quartz, heulandite, calcite' prehnite, John Holzman, 182 Ridgewood Ave., Newark, N. J' fleulandite, pectolite, red and smoky quartz, fine twin crystals of calcite' Write for list. J. P. Wintringham, 153 flenry St., Brooklyn, N' Y' Wanted: triclinic, monoclinic, or orthorhombic crystats for crystallographic measurement or for sections; pericline twins-single or polysynthetic or plagioclases of known composition. Please state what is wanted in return' THtr MINERAL COLLECTORSASSOCIATION A society for those who collect minerals oI fossils. Promotes a free and friendly exchangeof specimensemong its members. Dues: twenty-five cents per ye;r in advance. Official organ, The Mineral Collectors Bullptin' For iurtle" information, or in making application for membership, address the leeretarlr' Eouurvo Evenorr lroans, sn', 644 OId Niagara Road, LockPort, N. Y..

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I`mt`qx1/00Lhmdq`knesgdLnmsg9Rbnkdbhsd This month’s mineral, scolecite, is an uncommon zeolite from India. Our write-up explains its origin as a secondary mineral in volcanic host rocks, the difficulty of collecting this fragile mineral, the unusual properties of the zeolite-group minerals, and why mineralogists recently revised the system of zeolite classification and nomenclature. OVERVIEW PHYSICAL PROPERTIES Chemistry: Ca(Al2Si3O10)A3H2O Hydrous Calcium Aluminum Silicate (Hydrous Calcium Aluminosilicate), usually containing some potassium and sodium. Class: Silicates Subclass: Tectosilicates Group: Zeolites Crystal System: Monoclinic Crystal Habits: Usually as radiating sprays or clusters of thin, acicular crystals or Hairlike fibers; crystals are often flattened with tetragonal cross sections, lengthwise striations, and slanted terminations; also massive and fibrous. Twinning common. Color: Usually colorless, white, gray; rarely brown, pink, or yellow. Luster: Vitreous to silky Transparency: Transparent to translucent Streak: White Cleavage: Perfect in one direction Fracture: Uneven, brittle Hardness: 5.0-5.5 Specific Gravity: 2.16-2.40 (average 2.25) Figure 1. Scolecite. Luminescence: Often fluoresces yellow or brown in ultraviolet light. Refractive Index: 1.507-1.521 Distinctive Features and Tests: Best field-identification marks are acicular crystal habit; vitreous-to-silky luster; very low density; and association with other zeolite-group minerals, especially the closely- related minerals natrolite [Na2(Al2Si3O10)A2H2O] and mesolite [Na2Ca2(Al6Si9O30)A8H2O]. Laboratory tests are often needed to distinguish scolecite from other zeolite minerals. Dana Classification Number: 77.1.5.5 NAME The name “scolecite,” pronounced SKO-leh-site, is derived from the German Skolezit, which comes from the Greek sklx, meaning “worm,” an allusion to the tendency of its acicular crystals to curl when heated and dehydrated.
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A Single-Crystal Epr Study of Radiation-Induced Defects
A SINGLE-CRYSTAL EPR STUDY OF RADIATION-INDUCED DEFECTS IN SELECTED SILICATES A Thesis Submitted to the College of Graduate Studies and Research In Partial Fulfillment of the Requirements For the Degree of Doctor of Philosophy In the Department of Geological Sciences University of Saskatchewan Saskatoon By Mao Mao Copyright Mao Mao, October, 2012. All rights reserved. Permission to Use In presenting this thesis in partial fulfilment of the requirements for a Doctor of Philosophy degree from the University of Saskatchewan, I agree that the Libraries of this University may make it freely available for inspection. I further agree that permission for copying of this thesis in any manner, in whole or in part, for scholarly purposes may be granted by the professor or professors who supervised my thesis work or, in their absence, by the Head of the Department or the Dean of the College in which my thesis work was done. It is understood that any copying or publication or use of this thesis or parts thereof for financial gain shall not be allowed without my written permission. It is also understood that due recognition shall be given to me and to the University of Saskatchewan in any scholarly use which may be made of any material in my thesis. Requests for permission to copy or to make other use of material in this thesis in whole or part should be addressed to: Head of the Department of Geological Sciences 114 Science Place University of Saskatchewan Saskatoon, Saskatchewan S7N5E2, Canada i Abstract This thesis presents a series of single-crystal electron paramagnetic resonance (EPR) studies on radiation-induced defects in selected silicate minerals, including apophyllites, prehnite, and hemimorphite, not only providing new insights to mechanisms of radiation-induced damage in minerals but also having direct relevance to remediation of heavy metalloid contamination and nuclear waste disposal.
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Apophyllite-(Kf)
December 2013 Mineral of the Month APOPHYLLITE-(KF) Apophyllite-(KF) is a complex mineral with the unusual tendency to “leaf apart” when heated. It is a favorite among collectors because of its extraordinary transparency, bright luster, well- developed crystal habits, and occurrence in composite specimens with various zeolite minerals. OVERVIEW PHYSICAL PROPERTIES Chemistry: KCa4Si8O20(F,OH)·8H20 Basic Hydrous Potassium Calcium Fluorosilicate (Basic Potassium Calcium Silicate Fluoride Hydrate), often containing some sodium and trace amounts of iron and nickel. Class: Silicates Subclass: Phyllosilicates (Sheet Silicates) Group: Apophyllite Crystal System: Tetragonal Crystal Habits: Usually well-formed, cube-like or tabular crystals with rectangular, longitudinally striated prisms, square cross sections, and steep, diamond-shaped, pyramidal termination faces; pseudo-cubic prisms usually have flat terminations with beveled, distinctly triangular corners; also granular, lamellar, and compact. Color: Usually colorless or white; sometimes pale shades of green; occasionally pale shades of yellow, red, blue, or violet. Luster: Vitreous to pearly on crystal faces, pearly on cleavage surfaces with occasional iridescence. Transparency: Transparent to translucent Streak: White Cleavage: Perfect in one direction Fracture: Uneven, brittle. Hardness: 4.5-5.0 Specific Gravity: 2.3-2.4 Luminescence: Often fluoresces pale yellow-green. Refractive Index: 1.535-1.537 Distinctive Features and Tests: Pseudo-cubic crystals with pearly luster on cleavage surfaces; longitudinal striations; and occurrence as a secondary mineral in association with various zeolite minerals. Laboratory analysis is necessary to differentiate apophyllite-(KF) from closely-related apophyllite-(KOH). Can be confused with such zeolite minerals as stilbite-Ca [hydrous calcium sodium potassium aluminum silicate, Ca0.5,K,Na)9(Al9Si27O72)·28H2O], which forms tabular, wheat-sheaf-like, monoclinic crystals.
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Mineral Collecting Sites in North Carolina by W
.'.' .., Mineral Collecting Sites in North Carolina By W. F. Wilson and B. J. McKenzie RUTILE GUMMITE IN GARNET RUBY CORUNDUM GOLD TORBERNITE GARNET IN MICA ANATASE RUTILE AJTUNITE AND TORBERNITE THULITE AND PYRITE MONAZITE EMERALD CUPRITE SMOKY QUARTZ ZIRCON TORBERNITE ~/ UBRAR'l USE ONLV ,~O NOT REMOVE. fROM LIBRARY N. C. GEOLOGICAL SUHVEY Information Circular 24 Mineral Collecting Sites in North Carolina By W. F. Wilson and B. J. McKenzie Raleigh 1978 Second Printing 1980. Additional copies of this publication may be obtained from: North CarOlina Department of Natural Resources and Community Development Geological Survey Section P. O. Box 27687 ~ Raleigh. N. C. 27611 1823 --~- GEOLOGICAL SURVEY SECTION The Geological Survey Section shall, by law"...make such exami nation, survey, and mapping of the geology, mineralogy, and topo graphy of the state, including their industrial and economic utilization as it may consider necessary." In carrying out its duties under this law, the section promotes the wise conservation and use of mineral resources by industry, commerce, agriculture, and other governmental agencies for the general welfare of the citizens of North Carolina. The Section conducts a number of basic and applied research projects in environmental resource planning, mineral resource explora tion, mineral statistics, and systematic geologic mapping. Services constitute a major portion ofthe Sections's activities and include identi fying rock and mineral samples submitted by the citizens of the state and providing consulting services and specially prepared reports to other agencies that require geological information. The Geological Survey Section publishes results of research in a series of Bulletins, Economic Papers, Information Circulars, Educa tional Series, Geologic Maps, and Special Publications.
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Fluid and Mineral Inclusions and Inclusion Zones of Cave Calcite from Korsnäs Mine, Western Finland
FLUID AND MINERAL INCLUSIONS AND INCLUSION ZONES OF CAVE CALCITE FROM KORSNÄS MINE, WESTERN FINLAND PENTTI REHTIJARVI and KARI A. KINNUNEN REHTI JÄRVI, PENTTI and KINNUNEN, KARI A. 1979: Fluid and mineral inclusions and inclusion zones of cave calcite from Korsnäs Mine, western Finland. Bull. Geol. Soc. Finland 51, 75—79. Inclusions and crystal forms of calcite crystals from a cave in the Korsnäs lead-lanthanide mine in western Finland have been studied. The primary fluid inclusions in the scalenohedral yellowish calcite show homogenization temperatures of 79° to 103°C and salinities of 3.6 to 4.9 eq. wt. °/o NaCl. The prevailing crystal form is scaleno- hedron. In some specimens it reveals a rhombohedral phantom. Four mineralization stages are proposed on the basis of correlation between inclusion zones in multiple-zoned calcite crystals. Pentti Rehtijärvi and Kari A. Kinnunen, Geological Survey of Fin- land, SF-02150 Espoo 15, Finland. Introduction K/Ar-method (Dr. Eric Welin, written com- munication in 1975). The isotopic composit- During mining operations in the Korsnäs ion of the galena indicates an age of 1770 lead-lanthanide mine (closed 1972), situated Ma for the sulphide ore (Isokangas 1975). about 30 km south of the town of Vaasa in The cave mineralization was studied by western Finland, a cave was found 190 m collecting information from the fluid and below the earth's surface (Tuominen 1961). The cave (0.5 m X 1.5 m X 30 m) is part of mineral inclusions of different zones in indi- a vertical fracture zone. Its walls were vidual calcite crystals.
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POUDRETTEITE, Knarb3si12o3e, a NEW MEMBER of the OSUMILITE GROUP from MONT SAINT-HILAIRE, OUEBEC, and ITS CRVSTAL STRUCTURE Assr
Canadian Mineralogist Vol. 25, pp.763-166(1987) POUDRETTEITE,KNarB3Si12O3e, A NEW MEMBEROF THE OSUMILITEGROUP FROM MONT SAINT-HILAIRE,OUEBEC, AND ITS CRVSTALSTRUCTURE JOEL D. GRICE, T. SCOTT ERCIT AND JERRY VAN VELTHUIZEN Mineral SciencesDivision, National Museumof Natural Sciences,Ottawa, Ontario KIA 0M8 PETE J. DUNN Departmentof Mineral Sciences,Smithsonian Institution, Washington,D.C, 20560,U,S.A. Assrnact positionC d coordinanceXII, le sodium,la position,4d unecoordinance VI, le bore,la position72 ir coordinance Poudretteiteis a newmineral species from the Poudrette IV, le silicium,la position71 i coordinanceIV, etla posi- quarry, Mont Saint-Hilaire,Quebec. It occursin a marble tion B estvacante. xenolith includedin nephelinesyenite, associated with pec- tolite, apophyllite, quartz and minor aegirine.It forms clear, Mots-clds: poudrettdite, nouvelle espbce min6rale, groupe colorlessto very pale pink, equidimensional,subhedral del'osumilite, mont Saint-Hilaire, borosilicate, affi ne. prismsup to 5 mm. It is brittle, H about 5, with a splin- mentde Ia structure. tery fracture;Dmetr. 2.51(l) g/cml, D"6".2.53 g/cm3. Uniaxialpositive, co 1.516(l), e 1.532(l).It is-hexagonal, spacegroup P6/ mcc, a I 0.239(l), c 13.485(3)A and,Z : 2. INTRoDUcTIoN The strongestten X-ray-diffractionlines in the powderpat- tern [d in A(r\(hkDl are: 6.74(30)(002),5.13 (100)(110), The optical and physical propertiesof members 4.07(30)(r 12), 3.70(30)(202), 3.3 6e(30)(004), 3.253 ( I 00) of the osumilite group are similar to those of com- (2r r), 2.9s6(40)(3 00), 2.8 I 5(60)(I I 4), 2.686(50)(213,204) mon mineralssuch as quartz and cordierite;for this and 2.013(30)(321).An analysisby electron microprobe reason, they are probably generally overlooked.
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List of Abbreviations
List of Abbreviations Ab albite Cbz chabazite Fa fayalite Acm acmite Cc chalcocite Fac ferroactinolite Act actinolite Ccl chrysocolla Fcp ferrocarpholite Adr andradite Ccn cancrinite Fed ferroedenite Agt aegirine-augite Ccp chalcopyrite Flt fluorite Ak akermanite Cel celadonite Fo forsterite Alm almandine Cen clinoenstatite Fpa ferropargasite Aln allanite Cfs clinoferrosilite Fs ferrosilite ( ortho) Als aluminosilicate Chl chlorite Fst fassite Am amphibole Chn chondrodite Fts ferrotscher- An anorthite Chr chromite makite And andalusite Chu clinohumite Gbs gibbsite Anh anhydrite Cld chloritoid Ged gedrite Ank ankerite Cls celestite Gh gehlenite Anl analcite Cp carpholite Gln glaucophane Ann annite Cpx Ca clinopyroxene Glt glauconite Ant anatase Crd cordierite Gn galena Ap apatite ern carnegieite Gp gypsum Apo apophyllite Crn corundum Gr graphite Apy arsenopyrite Crs cristroballite Grs grossular Arf arfvedsonite Cs coesite Grt garnet Arg aragonite Cst cassiterite Gru grunerite Atg antigorite Ctl chrysotile Gt goethite Ath anthophyllite Cum cummingtonite Hbl hornblende Aug augite Cv covellite He hercynite Ax axinite Czo clinozoisite Hd hedenbergite Bhm boehmite Dg diginite Hem hematite Bn bornite Di diopside Hl halite Brc brucite Dia diamond Hs hastingsite Brk brookite Dol dolomite Hu humite Brl beryl Drv dravite Hul heulandite Brt barite Dsp diaspore Hyn haiiyne Bst bustamite Eck eckermannite Ill illite Bt biotite Ed edenite Ilm ilmenite Cal calcite Elb elbaite Jd jadeite Cam Ca clinoamphi- En enstatite ( ortho) Jh johannsenite bole Ep epidote
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Nature's Art: Geodes from the Collection of Robert R. Wiener
Nature’s Art: Geodes from the Collection of Robert R. Wiener The Rye Arts Center Spring - Summer 2021 Curated by Gail Harrison Roman, PhD A Tribute to Robert R. Wiener The Rye Arts Center extends its gratitude and love to Bob Wiener: Humanitarian, Connoisseur, Collector, Scholar, Educator, Cherished Friend Front cover: Vanadite, Morocco Back cover: Malachite, Congo 1 NATURE’S ART: GEODES FROM THE COLLECTION OF ROBERT R. WIENER Guiding Light of The Rye Arts Center Robert R. Wiener exemplifies the Mission of The Rye Arts Center. He is a supporter of cultural endeavors for all and a staunch believer in extending the educational value of the arts to underserved populations. His largesse currently extends to the Center by his sharing geodes with us. This is the latest chapter of his enduring support that began thirty-five years ago. Bob is responsible for saving 51 Milton Road by spearheading in 1986 the movement to prevent the city’s demolition of our home. He then led the effort to renovate the building that we now occupy. As a member of the RAC Board in the 1980s and 1990s, Bob helped guide the Center through its early years of expansion and success. His efforts have enabled RAC to become a beacon of the arts for the local community and beyond it. Bob has joined with RAC to place cases of his geodes in area schools, where they attract excited attention from children and adults alike. Bob’s maxim is “The purpose of life is to give back.” Led and inspired by Bob, The Wiener Family Philanthropy supports dozens of organizations devoted to the arts, community initiatives, education, health care, and positive youth empowerment.
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What We Know About Subduction Zones from the Metamorphic Rock Record
What we know about subduction zones from the metamorphic rock record Sarah Penniston-Dorland University of Maryland Subduction zones are complex We can learn a lot about processes occurring within active subduction zones by analysis of metamorphic rocks exhumed from ancient subduction zones Accreonary prism • Rocks are exhumed from a wide range of different parts of subduction zones. • Exhumed rocks from fossil subduction zones tell us about materials, conditions and processes within subduction zones • They provide complementary information to observations from active subduction systems Tatsumi, 2005 The subduction interface is more complex than we usually draw Mélange (Bebout, and Penniston-Dorland, 2015) Information from exhumed metamorphic rocks 1. Thermal structure The minerals in exhumed rocks of the subducted slab provide information about the thermal structure of subduction zones. 2. Fluids Metamorphism generates fluids. Fossil subduction zones preserve records of fluid-related processes. 3. Rheology and deformation Rocks from fossil subduction zones record deformation histories and provide information about the nature of the interface and the physical properties of rocks at the interface. 4. Geochemical cycling Metamorphism of the subducting slab plays a key role in the cycling of various elements through subduction zones. Thermal structure Equilibrium Thermodynamics provides the basis for estimating P-T conditions using mineral assemblages and compositions Systems act to minimize Gibbs Free Energy (chemical potential energy) Metamorphic facies and tectonic environment SubduconSubducon zone metamorphism zone metamorphism Regional metamorphism during collision Mid-ocean ridge metamorphism Contact metamorphism around plutons Determining P-T conditions from metamorphic rocks Assumption of chemical equilibrium Classic thermobarometry Based on equilibrium reactions for minerals in rocks, uses the compositions of those minerals and their thermodynamic properties e.g.
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Calcium-Aluminum-Silicate-Hydrate “
Cent. Eur. J. Geosci. • 2(2) • 2010 • 175-187 DOI: 10.2478/v10085-010-0007-6 Central European Journal of Geosciences Calcium-aluminum-silicate-hydrate “cement” phases and rare Ca-zeolite association at Colle Fabbri, Central Italy Research Article F. Stoppa1∗, F. Scordari2,E.Mesto2, V.V. Sharygin3, G. Bortolozzi4 1 Dipartimento di Scienze della Terra, Università G. d’Annunzio, Chieti, Italy 2 Dipartimento Geomineralogico, Università di Bari, Bari, Italy 3 Sobolev V.S. Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia 4 Via Dogali, 20, 31100-Treviso Received 26 January 2010; accepted 8 April 2010 Abstract: Very high temperature, Ca-rich alkaline magma intruded an argillite formation at Colle Fabbri, Central Italy, producing cordierite-tridymite metamorphism in the country rocks. An intense Ba-rich sulphate-carbonate- alkaline hydrothermal plume produced a zone of mineralization several meters thick around the igneous body. Reaction of hydrothermal fluids with country rocks formed calcium-silicate-hydrate (CSH), i.e., tobermorite- afwillite-jennite; calcium-aluminum-silicate-hydrate (CASH) – “cement” phases – i.e., thaumasite, strätlingite and an ettringite-like phase and several different species of zeolites: chabazite-Ca, willhendersonite, gismon- dine, three phases bearing Ca with the same or perhaps lower symmetry of phillipsite-Ca, levyne-Ca and the Ca-rich analogue of merlinoite. In addition, apophyllite-(KF) and/or apophyllite-(KOH), Ca-Ba-carbonates, portlandite and sulphates were present. A new polymorph from the pyrrhotite group, containing three layers of sphalerite-type structure in the unit cell, is reported for the first time. Such a complex association is unique.
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Minerals Found in Michigan Listed by County
Michigan Minerals Listed by Mineral Name Based on MI DEQ GSD Bulletin 6 “Mineralogy of Michigan” Actinolite, Dickinson, Gogebic, Gratiot, and Anthonyite, Houghton County Marquette counties Anthophyllite, Dickinson, and Marquette counties Aegirinaugite, Marquette County Antigorite, Dickinson, and Marquette counties Aegirine, Marquette County Apatite, Baraga, Dickinson, Houghton, Iron, Albite, Dickinson, Gratiot, Houghton, Keweenaw, Kalkaska, Keweenaw, Marquette, and Monroe and Marquette counties counties Algodonite, Baraga, Houghton, Keweenaw, and Aphrosiderite, Gogebic, Iron, and Marquette Ontonagon counties counties Allanite, Gogebic, Iron, and Marquette counties Apophyllite, Houghton, and Keweenaw counties Almandite, Dickinson, Keweenaw, and Marquette Aragonite, Gogebic, Iron, Jackson, Marquette, and counties Monroe counties Alunite, Iron County Arsenopyrite, Marquette, and Menominee counties Analcite, Houghton, Keweenaw, and Ontonagon counties Atacamite, Houghton, Keweenaw, and Ontonagon counties Anatase, Gratiot, Houghton, Keweenaw, Marquette, and Ontonagon counties Augite, Dickinson, Genesee, Gratiot, Houghton, Iron, Keweenaw, Marquette, and Ontonagon counties Andalusite, Iron, and Marquette counties Awarurite, Marquette County Andesine, Keweenaw County Axinite, Gogebic, and Marquette counties Andradite, Dickinson County Azurite, Dickinson, Keweenaw, Marquette, and Anglesite, Marquette County Ontonagon counties Anhydrite, Bay, Berrien, Gratiot, Houghton, Babingtonite, Keweenaw County Isabella, Kalamazoo, Kent, Keweenaw, Macomb, Manistee,
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High-Pressure Metamorphism and Uplift of the Olympic Subduction Complex
High-pressure metamorphism and uplift of the Olympic subduction complex Mark T. Brandon, Arthur R. Calderwood* Department of Geology and Geophysics, Yale University, P.O. Box 6666, New Haven, Connecticut 06511 ABSTRACT The discovery of the critical �mblage lawsonite + quartz + calcite indicates that a significant part of the Cenozoic Olympic subduction complex of northwestern Washington State formed by underplating at a depth of about 11 km. The deep structural level exposed in this area is attributed to the presence of a 10-km-high arch in the underlying Juan de Fuca plate. We postulate that this arch was formed when the southern Cordilleran coastline swung westward as a result of middle Miocene to recent extension in the Basin and Range province. INTRODUCTION Olympic subduction complex accumulated by the western Olympic subduction complex and The Cascadia convergent margin, which subduction underplating. In this paper we exam that of Hawkins (1967) on prehnite-bearing flanks the western side of Oregon, Washington, ine the metamorphic and uplift history of this rocks in the Mount Olympus area (MO in Fig. and Vancouver Island, marks the subduction subduction complex and postulate a new inter l ). Zones in the remaining areas were delimited boundary between North America and the Juan pretation for formation of the Olympic uplift. using samples collected during their mapping de Fuca plate. Along much of this margin, the (Tabor and Cady, 1978b) in the central and fore-arc region is underlain by a flat to gently METAMORPHISM OF THE eastern Olympic Peninsula. dipping sheet of lower Eocene basalt (Crescent, OLYMPIC SUBDUCTION COMPLEX We have examined thin sections from 138 Siletz, and correlative formations; Wells et al., Tabor and Cady (l978b) delimited a general sandstone samples from all parts of the Olympic 1984), which represents the basement on which metamorphic zonation decreasing in grade from subduction complex; most, however, are from a subsequent fore-arc basin has accumulated east to west.
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