Geology Club Mineral: Collecting Trip
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Structure and Physical Properties of Hydrogrossular Mineral Series
STRUCTURE AND PHYSICAL PROPERTIES OF HYDROGROSSULAR MINERAL SERIES A THESIS IN PHYSICS Presented to the Faculty of the University of Missouri-Kansas City in Partial requirements for the degree MASTER OF SCIENCE By PUJA ADHIKARI M.Sc, Tribhuban University, Kathmandu, Nepal, 2010 Kansas City, Missouri 2015 ©2015 PUJA ADHIKARI ALL RIGHTS RESERVED Structure and physical properties of Hydrogrossular mineral series Puja Adhikari, Candidate for the Master of Science Degree University of Missouri-Kansas City, 2015 ABSTRACT The mineral hydrogrossular series (Ca3Al2(SiO4)3-x(OH) 4x; 0 ≤ x ≤ 3) are important water bearing minerals found in the upper and lower part of the Earth’s mantle. They are vital to the planet’s hydrosphere under different hydrothermal conditions. The composition and structure of this mineral series are important in geoscience and share many commonalities with cement and clay materials. Other than the end members of the series x = 0 (grossular) and x = 3 (katoite) which have a cubic garnet structure, the structure of the series is totally unknown. We used large-scale ab initio modeling to investigate the structures and properties for hydrogrossular series for x = 0, 0.5, 1, 1.5, 2, 2.5, 3. Results indicate that for x > 0 and x < 3, the structures are tetragonal. This shows that there is structural change related to the lowering of overall symmetry associated with the composition of SiO4 tetrahedra and AlO6 octahedra. Total Bond order also explains the reason behind the change in the compressibility of the series. The electronic structure, mechanical and optical properties of the hydrogrossular series are calculated and the results for grossular and katoite are in good agreement with the available experimental data. -
Washington State Minerals Checklist
Division of Geology and Earth Resources MS 47007; Olympia, WA 98504-7007 Washington State 360-902-1450; 360-902-1785 fax E-mail: [email protected] Website: http://www.dnr.wa.gov/geology Minerals Checklist Note: Mineral names in parentheses are the preferred species names. Compiled by Raymond Lasmanis o Acanthite o Arsenopalladinite o Bustamite o Clinohumite o Enstatite o Harmotome o Actinolite o Arsenopyrite o Bytownite o Clinoptilolite o Epidesmine (Stilbite) o Hastingsite o Adularia o Arsenosulvanite (Plagioclase) o Clinozoisite o Epidote o Hausmannite (Orthoclase) o Arsenpolybasite o Cairngorm (Quartz) o Cobaltite o Epistilbite o Hedenbergite o Aegirine o Astrophyllite o Calamine o Cochromite o Epsomite o Hedleyite o Aenigmatite o Atacamite (Hemimorphite) o Coffinite o Erionite o Hematite o Aeschynite o Atokite o Calaverite o Columbite o Erythrite o Hemimorphite o Agardite-Y o Augite o Calciohilairite (Ferrocolumbite) o Euchroite o Hercynite o Agate (Quartz) o Aurostibite o Calcite, see also o Conichalcite o Euxenite o Hessite o Aguilarite o Austinite Manganocalcite o Connellite o Euxenite-Y o Heulandite o Aktashite o Onyx o Copiapite o o Autunite o Fairchildite Hexahydrite o Alabandite o Caledonite o Copper o o Awaruite o Famatinite Hibschite o Albite o Cancrinite o Copper-zinc o o Axinite group o Fayalite Hillebrandite o Algodonite o Carnelian (Quartz) o Coquandite o o Azurite o Feldspar group Hisingerite o Allanite o Cassiterite o Cordierite o o Barite o Ferberite Hongshiite o Allanite-Ce o Catapleiite o Corrensite o o Bastnäsite -
Mineral Processing
Mineral Processing Foundations of theory and practice of minerallurgy 1st English edition JAN DRZYMALA, C. Eng., Ph.D., D.Sc. Member of the Polish Mineral Processing Society Wroclaw University of Technology 2007 Translation: J. Drzymala, A. Swatek Reviewer: A. Luszczkiewicz Published as supplied by the author ©Copyright by Jan Drzymala, Wroclaw 2007 Computer typesetting: Danuta Szyszka Cover design: Danuta Szyszka Cover photo: Sebastian Bożek Oficyna Wydawnicza Politechniki Wrocławskiej Wybrzeze Wyspianskiego 27 50-370 Wroclaw Any part of this publication can be used in any form by any means provided that the usage is acknowledged by the citation: Drzymala, J., Mineral Processing, Foundations of theory and practice of minerallurgy, Oficyna Wydawnicza PWr., 2007, www.ig.pwr.wroc.pl/minproc ISBN 978-83-7493-362-9 Contents Introduction ....................................................................................................................9 Part I Introduction to mineral processing .....................................................................13 1. From the Big Bang to mineral processing................................................................14 1.1. The formation of matter ...................................................................................14 1.2. Elementary particles.........................................................................................16 1.3. Molecules .........................................................................................................18 1.4. Solids................................................................................................................19 -
Fluorian Garnets from the Host Rocks of the Skaergaard Intrusion: Implications for Metamorphic Fluid Composition
American Mineralogist, Volume 75, pages 859-873,1990 Fluorian garnets from the host rocks of the Skaergaard intrusion: Implications for metamorphic fluid composition CRAIG E. MANNING, * DENNIS K. BIRD Department of Geology, Stanford University, Stanford, California 94305, U.S.A. ABSTRACT Zoned, silica-deficient, calcic garnets containing up to 5 mol% F substitution for 0 formed during contact metamorphism of basalts by the Skaergaard intrusion in East Greenland. Fluorian calcic garnets occur as a retrograde alteration of prograde wollastonite and clinopyroxene that fills vesicles and vugs in lavas 30-70 m from the intrusion. Para- genetically equivalent phases include fluorite, wollastonite, calcic clinopyroxene, prehnite, quartz, and calcite. Electron microprobe analysis shows that the garnets are :::-:93mol% grossular-andradite (grandite) solid solutions and that the F content does not fully com- pensate for the silica deficiency, suggesting the presence of a hydrous component in the garnets. The garnets display discontinuous zoning with respect to Al and Fe, and increases in F, calculated OH, and the Si deficiency with increasing Al concentration are observed. The garnets formed at temperatures between 200 and 420°C based on the coexisting mineral assemblage, and stratigraphic reconstructions indicate pressures of ~ 1 kbar. Assessment of isobaric, isothermal phase relations in the system CaO-A1203-Si02-H20- HF allows estimation of fluid characteristics in equilibrium with fluorian grandite-bearing assemblages. The presence of fluorite, wollastonite, quartz, and calcite with these garnets combined with fluid inclusion data require that the activity (a) of H20 was ~ 1 and that aH.aF was 10-105 to 10-10.0in the coexisting hydrothermal solutions at 200-420 °C and 1 kbar. -
The Effect of Reduced Activity of Anorthite on the Reaction Grossular
AmericanMineralogist, Volume61, pages 889-896,1976 The effectof reducedactivity of anorthiteon thereaction grossular * quartz : anorthite* wollastonite:a modelfor plagioclasein the earth'slower crust anh upper mantle K. E. WrNnoMr AND A. L. BoerrcHrnl Department of Geosciences,The Pennsyluania State (lniuersity Uniuersity Park, Pennsyluania 16802 Abstract The reaction CasAlrSiaor, + SiO, : CaAlzSiros + 2 CaSiOg (erossular) (quartz) (anortbite) (wollastoDite) wasinvestigated at l10ooC,using intermediate-composition plagioclase to determinethe shift of the equilibriumpressure as a functionof compositionat pressureand temperaturecondi- tions representativeof the earth'slower crustand uppermantle. For compositionswithin the rangeAnro-,00, activity of the anorthitecomponent is equalto its molefraction. For composi- tions more albitic than about Anro,the activity of the anorthitecomponent equals its mole fractionmultiplied by a constantfactor of 1.2.This latter behavioris interpretedas a resultof anorthite-likedomains being in an energeticallyunfavorable environment for thesecomposi- tions. Applicationof the data obtainedfrom subsolidusexperiments to meltingbehavior indicates that plagioclaseliquids do not obey Raoult'sLaw, but havean activitycoefficient similar to crystallineplagioclase. This hypothesisis supportedby high-pressuremelting experiments for both anhydrousand hydroussystems. In parts of the lower crustcomposed of basicrock (e.g.gabbro), the calcicplagioclase will be consumedat relativelyshallow levels and over a narrow (2-3 km) -
Maine the Way Life Should Be. Mineral Collecting
MAINE The Way Life Should Be. Mineral Collecting The Maine Publicity Bureau, Inc. Quarries You May Visit # 1 Topsham: The Fisher Quarry is located off Route 24 in Topsham. This locale is best known for crystals of topaz, green microlite, and dark blue tourmaline. It has also produced other minerals such as beryl, uraninite and cassiterite. #2 Machiasport: At an area known as Jasper Beach there is an abundance of vari-colored jasper and/or rhyolite specimens. Located on Route 92. #3 Buckfield: The Bennett Quarry, located between Buckfield and Paris Hill, has produced fine specimens of blue and pink beryl including some gem material. It is also known for crystals of quartz, green tourmaline and rare minerals. #4 Casco: The Chute Prospect is best known for vesuvianite. It is located east of Route 302-35. Crystals of “cinnamon” garnet, quartz and pyrite are also found here. #5 Georgetown: The Consolidated Feldspar Quarry has produced excel lent specimens of gem citrine quartz, tourmaline and spodumene. Rose Quartz, cookeite and garnet are also found. #6 Paris: Mount Mica is world famous for tourmaline and this gem material was discovered here in 1821. This is one of the most likely places for a collector to find tourmaline. Mount Mica has produced a host of other minerals including beryl, cookeite, black tourmaline, colum- bite, lepidolite and garnet. (Currently being mined) #7 Greenwood: The Tamminen Quarry and the Harvard Quarry, both located near Route 219, have produced an interesting variety of miner als. The Tamminen Quarry is best known for pseudo-cubic quartz crystals, montmorillonite, spodumene and garnet. -
The Journal of Gemmology Editor: Dr R.R
he Journa TGemmolog Volume 25 No. 8 October 1997 The Gemmological Association and Gem Testing Laboratory of Great Britain Gemmological Association and Gem Testing Laboratory of Great Britain 27 Greville Street, London Eel N SSU Tel: 0171 404 1134 Fax: 0171 404 8843 e-mail: [email protected] Website: www.gagtl.ac.uklgagtl President: Professor R.A. Howie Vice-Presidents: LM. Bruton, Af'. ram, D.C. Kent, R.K. Mitchell Honorary Fellows: R.A. Howie, R.T. Liddicoat Inr, K. Nassau Honorary Life Members: D.). Callaghan, LA. lobbins, H. Tillander Council of Management: C.R. Cavey, T.]. Davidson, N.W. Decks, R.R. Harding, I. Thomson, V.P. Watson Members' Council: Aj. Allnutt, P. Dwyer-Hickey, R. fuller, l. Greatwood. B. jackson, J. Kessler, j. Monnickendam, L. Music, l.B. Nelson, P.G. Read, R. Shepherd, C.H. VVinter Branch Chairmen: Midlands - C.M. Green, North West - I. Knight, Scottish - B. jackson Examiners: A.j. Allnutt, M.Sc., Ph.D., leA, S.M. Anderson, B.Se. (Hons), I-CA, L. Bartlett, 13.Se, .'vI.phil., I-G/\' DCi\, E.M. Bruton, FGA, DC/\, c.~. Cavey, FGA, S. Coelho, B.Se, I-G,\' DGt\, Prof. A.T. Collins, B.Sc, Ph.D, A.G. Good, FGA, f1GA, Cj.E. Halt B.Sc. (Hons), FGr\, G.M. Howe, FG,'\, oo-, G.H. jones, B.Se, PhD., FCA, M. Newton, B.Se, D.PhiL, H.L. Plumb, B.Sc., ICA, DCA, R.D. Ross, B.5e, I-GA, DGA, P..A.. Sadler, 13.5c., IGA, DCA, E. Stern, I'GA, DC/\, Prof. I. -
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. -
Solubility of Grossular, Ca3al2si3o12, in H2O–Nacl
Available online at www.sciencedirect.com Geochimica et Cosmochimica Acta 71 (2007) 5191–5202 www.elsevier.com/locate/gca Solubility of grossular, Ca3Al2Si3O12,inH2O–NaCl solutions at 800 °C and 10 kbar, and the stability of garnet in the system CaSiO3–Al2O3–H2O–NaCl Robert C. Newton, Craig E. Manning * Department of Earth and Space Sciences, University of California Los Angeles, Los Angeles, CA 90095-1567, USA Received 8 February 2007; accepted in revised form 16 August 2007; available online 19 September 2007 Abstract The solubility and stability of synthetic grossular were determined at 800 °C and 10 kbar in NaCl–H2O solutions over a large range of salinity. The measurements were made by evaluating the weight losses of grossular, corundum, and wollastonite crystals equilibrated with fluid for up to one week in Pt capsules and a piston-cylinder apparatus. Grossular dissolves con- gruently over the entire salinity range and displays a large solubility increase of 0.0053 to 0.132 molal Ca3Al2Si3O12 with increasing NaCl mole fraction (XNaCl) from 0 to 0.4. There is thus a solubility enhancement 25 times the pure H2O value over the investigated range, indicating strong solute interaction with NaCl. The Ca3Al2Si3O12 mole fraction versus NaCl mole frac- tion curve has a broad plateau between XNaCl = 0.2 and 0.4, indicating that the solute products are hydrous; the enhancement effect of NaCl interaction is eventually overtaken by the destabilizing effect of lowering H2O activity. In this respect, the sol- ubility behavior of grossular in NaCl solutions is similar to that of corundum and wollastonite. -
Gem-Quality Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy: an Investigation of Its Mineralogy, Crystallography and 3D Inclusions
minerals Article Gem-Quality Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy: An Investigation of Its Mineralogy, Crystallography and 3D Inclusions Valeria Diella 1,* , Federico Pezzotta 2, Rosangela Bocchio 3, Nicoletta Marinoni 1,3, Fernando Cámara 3 , Antonio Langone 4 , Ilaria Adamo 5 and Gabriele Lanzafame 6 1 National Research Council, Institute for Dynamics of Environmental Processes (IDPA), Section of Milan, 20133 Milan, Italy; [email protected] 2 Natural History Museum, 20121 Milan, Italy; [email protected] 3 Department of Earth Sciences “Ardito Desio”, University of Milan, 20133 Milan, Italy; [email protected] (R.B.); [email protected] (F.C.) 4 National Research Council, Institute of Geosciences and Earth Resources (IGG), Section of Pavia, 27100 Pavia, Italy; [email protected] 5 Italian Gemmological Institute (IGI), 20123 Milan, Italy; [email protected] 6 Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy; [email protected] * Correspondence: [email protected]; Tel.: +39-02-50315621 Received: 12 November 2018; Accepted: 7 December 2018; Published: 13 December 2018 Abstract: In the early 2000s, an exceptional discovery of gem-quality multi-coloured tourmalines, hosted in Litium-Cesium-Tantalum (LCT) pegmatites, was made in the Adamello Massif, Italy. Gem-quality tourmalines had never been found before in the Alps, and this new pegmatitic deposit is of particular interest and worthy of a detailed characterization. We studied a suite of faceted samples by classical gemmological methods, and fragments were studied with Synchrotron X-ray computed micro-tomography, which evidenced the occurrence of inclusions, cracks and voids. -
ROCK TALK Fax: 520-322-6031 E-Mail: [email protected] January – February 2012 Website: Volume 6, Issue 3
Tucson Gem and Mineral Society, Inc. PO Box, 42588, Tucson, Arizona 85733 Ph: 520-322-5773 ROCK TALK Fax: 520-322-6031 E-mail: [email protected] January – February 2012 Website: www.tgms.org Volume 6, Issue 3 President’s Page President’s Page … CONTINUED Greetings to all of our members and those members that contributed with hoping you had a wonderful Holiday donations to the Community Food Bank and Season with your friends and family. the Tucson Firefighters Toy Drive. This is an Lots of love, fun and food to remind attempt to, not only help the families of us of how fortunate we are and how Tucson, but give the Tucson Gem and Mineral Society a positive image in our community. much we appreciate each other and all our blessings. Now we This is so important to our being considered have a New Year approaching and an important part of Tucson, we are more a time of renewal and resolutions. than a Show, we are a responsible and viable Time to reflect and get busy in 2012. resource that can and should be appreciated We have a lot to do. all year. The Show is fast approaching and our volunteers So, the New Year is upon us, lets learn from and staff are hard at work just trying to get the past and take that knowledge into the everything ready for one of the best Shows we future to make better choices and decisions. have ever sponsored. “Minerals of Arizona” Thank you all for being a part of our Society promises to bring to our visitors and dealers an and now, lets "get on with the Show!!!!” opportunity to be a part of a very special event. -
Paris Fashion Week and Its Gems
InDesign 1 Evoking the Amalfi coast, Piaget’s Sunlight Journey Paris Fashion Week collection features a mosaic of luminous colors, includ- ing opal, sapphire, emerald, spinel and diamond as well and Its Gems 8 as feather marquetry. The Swiss brand is quickly joining the very closed circle of high jewelry, with gems that pay Paris was aglow during the first week of July as Fashion vibrant homage to the work of Yves Piaget. Among Week kicked off to an international audience. This year, these beautiful stones was a 10.09-carat pink spinel the Place Vendôme was even a little bit Italian as four 7 from Tanzania and an 11.85-carat fancy intense yel- global brands unveiled collections inspired by Italy and low diamond. the Mediterranean Sea. On trend were joyful collections Other brands explored elsewhere for inspira- flamboyant colors and cheerfulness. tion. For one day at Dior, the brand’s offices were By Marie Chabrol transformed into a mysterious garden like those of Versailles. Victoire de Castellane designed a hile there were not really any major trends, four very colorful and highly technical collection by mix- Italian brands that joined the event showcased 2 ing different colors of gold and rare stones, such as Wnew pieces that drew inspiration from their Ital- hauyne or demantoid garnet with a multitude of gem- ian heritage. stones whose colors blended festively together. Giampiero Bodino looked to Italy and the Mediter- ranean Sea for a collection of 19 pieces that celebrate 9 11 color and a joie de vivre. Contrasts between pink opal and amethyst, blue sapphire, yellow beryl and fire opal 3 attracted attention with smaller stones for a softer result.