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Mineralization at Le Pulec, Jersey, Channel Islands; No. 1 Lode
134 SHORT COMMUNICATIONS REFERENCES McKay, W. J. (1975) Woodlawn copper-lead-zinc orebody. Ibid. 701-10. Davis, L. W. (1975) Captains Flat lead-zinc orebody. In Knight, C. L. (ed.). Economic Geology of Australia and Papua New Guinea I. Metals. Melbourne, Australasian [Revised manuscript received 2 June 1981] Institute of Mining and Metallurgy, 691-700. Malone, E. J., Olgers, F., Cucchi, F. G., Nicholas, T., and t~) Copyright the Mineralogical Society Dept. of Geology, University of Wollonoong, New South Wales, Australia F. IVOR ROBERTS [Present address: School of Applied Geology, University of New South Wales, PO Box 1, Kensinoton , NSW 2033, Australia] MINERALOGICAL MAGAZINE, MARCH 1982, VOL. 46, PP. 134-6 Mineralization at Le Pulec, Jersey, Channel Islands; No. 1 Lode THE No. 1 Lode is the westernmost and most Mineralization within the Brioverian sediments extensive of three lead-zinc veins cutting Brioverian sediments at Le Pulec. It was described by Williams Anatase is common within the sediments as 2-10 (1871) as being between 1.5 and 1.8 m in width and pm anhedral grains associated with silicates or 183 m in length, with a trend of 340 ~ and the as 10 x 2 #m laths, parallel to the basal cleavage galena was reported to have a high silver content. of the altered phyllosilicates, particularly musco- Since the investigation of the No. 3 Lode (Ixer and vite. Anatase is also found with hematite laths Stanley, 1980) it has been possible to examine (20x 2 /~m) included in early pyrite grains. A several specimens, collected from the recently re- coarse-grained (600 x 20 pm) generation of anatase discovered No. -
The Nature of Waste Associated with Closed Mines in England and Wales
The nature of waste associated with closed mines in England and Wales Minerals & Waste Programme Open Report OR/10/14 BRITISH GEOLOGICAL SURVEY MINERALS & WASTE PROGRAMME OPEN REPORT OR/10/14 The National Grid and other Ordnance Survey data are used with the permission of the The nature of waste associated Controller of Her Majesty’s Stationery Office. OS Topography © Crown with closed mines in England and Copyright. All rights reserved. BGS 100017897/2010 Wales Keywords Abandoned mine waste facilities; Palumbo-Roe, B and Colman, T England and Wales; mineral deposits; environmental impact; Contributor/editor European Mine Waste Directive. Cameron, D G, Linley, K and Gunn, A G Front cover Graiggoch Mine (SN 7040 7410), Ceredigion, Wales. Bibliographical reference Palumbo-Roe, B and Colman, T with contributions from Cameron, D G, Linley, K and Gunn, A G. 2010. The nature of waste associated with closed mines in England and Wales. British Geological Survey Open Report, OR/10/14. 98pp. Copyright in materials derived from the British Geological Survey’s work is owned by the Natural Environment Research Council (NERC) and the Environment Agency that commissioned the work. You may not copy or adapt this publication without first obtaining permission. Contact the BGS Intellectual Property Rights Section, British Geological Survey, Keyworth, e-mail [email protected]. You may quote extracts of a reasonable length without prior permission, provided a full acknowledgement is given of the source of the extract. The views and statements expressed in this report are those of the authors alone and do not necessarily represent the views of the Environment Agency. -
21Àxs34, a New Thallium Sulphosalt from Lengenbach Quarry, Binntal, Switzerland
Mineralogical Magazine, December 2009, Vol.73(6), pp.1027–1032 Dalnegroite, Tl5ÀxPb2x(As,Sb)21ÀxS34, a new thallium sulphosalt from Lengenbach quarry, Binntal, Switzerland 1, 1 2 1 F. NESTOLA *, A. GUASTONI ,L.BINDI AND L. SECCO 1 Dipartimento di Geoscienze, Universita` degli Studi di Padova, Via Giotto 1, I-35137 Padova, Italy 2 Museo di Storia Naturale, sezione di Mineralogia, Universita` degli Studi di Firenze, Via La Pira, 4, I-50121 Firenze, Italy [Received 16 October 2009; Accepted 14 December 2009] ABSTRACT Dalnegroite, ideally Tl4Pb2(As12Sb8)S20S34, is a new mineral from Lengenbach, Binntal, Switzerland. It occurs as anhedral to subhedral grains up to 200 mm across, closely associated with realgar, pyrite, Sb- rich seligmanite in a gangue of dolomite. Dalnegroite is opaque with a submetallic lustre and shows a À2 brownish-red streak. It is brittle; the Vickers hardness (VHN25)is87kgmm (range: 69À101) (Mohs hardness ~3À3Ý). In reflected light, dalnegroite is highly bireflectant and weakly pleochroic, from white to a slightly greenish-grey. In cross-polarized light, it is highly anisotropic with bluish to green rotation tints and red internal reflections. According to chemical and X-ray diffraction data, dalnegroite appears to be isotypic with ˚ chabourne´ite, Tl5ÀxPb2x(Sb,As)21ÀxS34. It is triclinic, probable space group P1, with a = 16.217(7) A, b = 42.544(9) A˚ , c = 8.557(4) A˚ , a = 95.72(4)º, b = 90.25(4)º, g = 96.78(4)º, V = 5832(4) A˚ 3, Z =4. ˚ The nine strongest powder-diffraction lines [d (A)(I/I0)(hkl)] are: 3.927 (100) (2¯ 10 0); 3.775 (45) (22¯2); 3.685 (45) (4¯60); 3.620 (50) (440); 3.124 (50) (2¯8¯2); 2.929 (60) (42¯2); 2.850 (70) (4¯42); 2.579 (45) (0 14 2); 2.097 (60) (024). -
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 -
Third-Generation Synchrotron X-Ray Diffraction of 6- M Crystal of Raite, Na
Proc. Natl. Acad. Sci. USA Vol. 94, pp. 12263–12267, November 1997 Geology Third-generation synchrotron x-ray diffraction of 6-mm crystal of raite, 'Na3Mn3Ti0.25Si8O20(OH)2z10H2O, opens up new chemistry and physics of low-temperature minerals (crystal structureymicrocrystalyphyllosilicate) JOSEPH J. PLUTH*, JOSEPH V. SMITH*†,DMITRY Y. PUSHCHAROVSKY‡,EUGENII I. SEMENOV§,ANDREAS BRAM¶, CHRISTIAN RIEKEL¶,HANS-PETER WEBER¶, AND ROBERT W. BROACHi *Department of Geophysical Sciences, Center for Advanced Radiation Sources, GeologicalySoilyEnvironmental, and Materials Research Science and Engineering Center, 5734 South Ellis Avenue, University of Chicago, Chicago, IL 60637; ‡Department of Geology, Moscow State University, Moscow, 119899, Russia; §Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, 117071, Russia; ¶European Synchrotron Radiation Facility, BP 220, 38043, Grenoble, France; and UOP Research Center, Des Plaines, IL 60017 Contributed by Joseph V. Smith, September 3, 1997 ABSTRACT The crystal structure of raite was solved and the energy and metal industries, hydrology, and geobiology. refined from data collected at Beamline Insertion Device 13 at Raite lies in the chemical cooling sequence of exotic hyperal- the European Synchrotron Radiation Facility, using a 3 3 3 3 kaline rocks of the Kola Peninsula, Russia, and the 65 mm single crystal. The refined lattice constants of the Monteregian Hills, Canada (2). This hydrated sodium- monoclinic unit cell are a 5 15.1(1) Å; b 5 17.6(1) Å; c 5 manganese silicate extends the already wide range of manga- 5.290(4) Å; b 5 100.5(2)°; space group C2ym. The structure, nese crystal chemistry (3), which includes various complex including all reflections, refined to a final R 5 0.07. -
Brownmillerite Ca2(Al, Fe )2O5 C 2001-2005 Mineral Data Publishing, Version 1
3+ Brownmillerite Ca2(Al, Fe )2O5 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic. Point Group: mm2. As square platelets, to about 60 µm; massive. Physical Properties: Hardness = n.d. D(meas.) = 3.76 D(calc.) = 3.68–3.73 Optical Properties: Semitransparent. Color: Reddish brown. Optical Class: Biaxial (–). Pleochroism: Distinct; X = Y = yellow-brown; Z = dark brown. Orientation: Y and Z lie in the plane of the platelets; extinction in that plane is diagonal. α = < 2.02 β = > 2.02 γ = > 2.02 2V(meas.) = n.d. Cell Data: Space Group: Ibm2. a = 5.584(5) b = 14.60(1) c = 5.374(5) Z = 2 X-ray Powder Pattern: Near Mayen, Germany. 2.65 (vs), 7.19 (s), 2.78 (s), 1.93 (s), 2.05 (ms), 3.65 (m), 1.82 (m) Chemistry: (1) (2) (3) TiO2 1.5 1.9 Al2O3 17.2 22.3 13.1 Fe2O3 30.5 27.6 41.9 Cr2O3 0.1 n.d. MgO n.d. n.d. CaO 46.2 44.8 43.7 insol. 4.0 LOI 0.5 Total 94.4 100.3 100.6 (1) Near Mayen, Germany; by semiquantitative spectroscopy. (2) Hatrurim Formation, Israel; corresponds to Ca1.99(Al1.09Fe0.86Ti0.05)Σ=2.00O5. (3) Do.; corresponds to Ca1.95(Fe1.31Al0.64 Ti0.06)Σ=2.01O5. Occurrence: In thermally metamorphosed limestone blocks included in volcanic rocks (near Mayen, Germany); in high-temperature, thermally metamorphosed, impure limestones (Hatrurim Formation, Israel). Association: Calcite, ettringite, wollastonite, larnite, mayenite, gehlenite, diopside, pyrrhotite, grossular, spinel, afwillite, jennite, portlandite, jasmundite (near Mayen, Germany); melilite, mayenite, wollastonite, kalsilite, corundum (Kl¨och, Austria); spurrite, larnite, mayenite (Hatrurim Formation, Israel). -
SEG Bratislava, Field Trip Report Location: Mitrovica, Trepca Mining Region, Kosovo in Cooperation with Assoc
SEG Bratislava, Field trip report Location: Mitrovica, Trepca mining region, Kosovo In cooperation with Assoc. Prof. Jaroslav Prseek PhD. (University of Science and Technologyk Kraeow) we have sucessfully organized 4-day field trip dedicated to important deposits in Kosovo. Eight SEG members were involved in this trip led by Tomás Klučiar and Peter Varga. During these four days we have visited Pb-Zn deposits (Stan Tergk Artana and Drazhnje)k and Ni-laterite deposits in Glavica. First day our group travelled 12 hours through Hungaryk Sloveniak Serbia to Kosovok where we have accomodated. On second day our group visited the mine in Trepča region – Stan Tergk located near Stari Trg village in the Trepča valleyk about 8 em east of Kosovsea Mitrovica. This is the central mine of the Trepča complex. Mining at Trepca region is documented since the late Middle Ages. In the 20th centuryk the mine was closed during the Kosovo war of 1998-99. The two smelters were destroyed and the mine completely floodedk after Kosovo war the mine was reopened in 2005. Main deposits of mine is Pb-Zn-Ag searn hosted by recrystallized limestone of Upper Triassic age. The deposit was formed during two distinct mineralization stages: an early prograde closed-system and a later retrograde open-system stage. The prograde mineralisation consists mainly of clinopyroxenesk the retrograde mineralisation comprises ilvaitek magnetitek arsenopyritek pyrrhotitek marcasitek pyritek quartz and various carbonates. The open-system character is related to phreatomagmatic explosion and formation of a breccia. The principal ore minerals were deposited from a moderately saline Ca-Na chloride fluid at around 350°C. -
Subject Index, Volume 81, 1996
American Mineralogist, Volume 81, pages 1543-1551, 1996 SUBJECT INDEX, VOLUME 81, 1996 Ag3TeS 1013 geikielite 485 florencite-(La) 1263 4°Ar 940 hornblende 928 glass 229 AuO(OH) 1282 hyttsj6ite 743 granitic melt 202 AuO(OH,Cl)onH20 766 kalsilite 561, 1360 kaolin 26 Achtarandite 516 kaolinite 26 migmatite 141 Afghanite 1003 kinoshitalite 485 orendite 229 Albite 92, 452, 789, 1133, 1344, laumontite 658 peridotite 79 1413 leonhardite 658, 668 rhyolite 158 Alkali feldspar 92, 719, 800, 1425 liandratite 1237 rhyolitic glass 158, 1249 Almandine 418 magnesiochromite 1186 sandstone 213 Altisite 516 magnesite 181 serpentinite 79 Aluminate sodalite 1375 medenbachite 505 volcanic glass 1176 Aluminosilicate glasses 265 muscovite 141, 1460 volcanic rocks 982 Alumoklyuchevskite 249 namuwite 238 Analysis, surface (mineral) Amphibole 135, 495, 1126 nanpingite 105 calcite 1 Analcime 39 nepheline 561, 1360 pyrite 261 Analysis, chemical (mineral) olivine 194, 1519 Anatexis 141 albite 92 omphacite 181 Androsite-(La) 735 alkali feldspar 719 orthopyroxene 676, 842 Ankerite 1141 almandine 418 pentlandite 187 Annite 475 amphibole 135, 495 phlogopite 202, 485,913 Annite-sanidine-magnetite 415 androsite-(La) 735 pigeonite 1166 Anorthoclase 1332 apatite 515 plagioclase 141, 913, 982, 1460 Antimonselite 1013 augite 1166 potassium feldspar 141 Antitaenite 766 bechererite 244 pumpellyite 603 Apatite 864, 1476 betafite 1237 pyralspitic garnet 418 Aragonite 181, 611 biopyribole 404 pyrite 119, 187 Arsenogorceixite 249 biotite 135, 141, 495, 1396, pyrope 418, 706 Asteroid -
Chemical Composition and Petrogenetic Implications of Eudialyte-Group Mineral in the Peralkaline Lovozero Complex, Kola Peninsula, Russia
minerals Article Chemical Composition and Petrogenetic Implications of Eudialyte-Group Mineral in the Peralkaline Lovozero Complex, Kola Peninsula, Russia Lia Kogarko 1,* and Troels F. D. Nielsen 2 1 Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia 2 Geological Survey of Denmark and Greenland, 1350 Copenhagen, Denmark; [email protected] * Correspondence: [email protected] Received: 23 September 2020; Accepted: 16 November 2020; Published: 20 November 2020 Abstract: Lovozero complex, the world’s largest layered peralkaline intrusive complex hosts gigantic deposits of Zr-, Hf-, Nb-, LREE-, and HREE-rich Eudialyte Group of Mineral (EGM). The petrographic relations of EGM change with time and advancing crystallization up from Phase II (differentiated complex) to Phase III (eudialyte complex). EGM is anhedral interstitial in all of Phase II which indicates that EGM nucleated late relative to the main rock-forming and liquidus minerals of Phase II. Saturation in remaining bulk melt with components needed for nucleation of EGM was reached after the crystallization about 85 vol. % of the intrusion. Early euhedral and idiomorphic EGM of Phase III crystalized in a large convective volume of melt together with other liquidus minerals and was affected by layering processes and formation of EGM ore. Consequently, a prerequisite for the formation of the ore deposit is saturation of the alkaline bulk magma with EGM. It follows that the potential for EGM ores in Lovozero is restricted to the parts of the complex that hosts cumulus EGM. Phase II with only anhedral and interstitial EGM is not promising for this type of ore. -
Silver Enrichment in the San Juan Mountains, Colorado
SILVER ENRICHMENT IN THE SAN JUAN MOUNTAINS, COLORADO. By EDSON S. BASTIN. INTRODUCTION. The following report forms part of a topical study of the enrich ment of silver ores begun by the writer under the auspices of the United States Geological Survey in 1913. Two reports embodying the results obtained at Tonopah, Nev.,1 and at the Comstock lode, Virginia City, Nev.,2 have previously been published. It was recognized in advance that a topical study carried on by a single investigator in many districts must of necessity be less com prehensive than the results gleaned more slowly by many investi gators in the course of regional surveys of the usual types; on the other hand the advances made in the study of a particular topic in one district would aid in the study of the same topic in the next. In particular it was desired to apply methods of microscopic study of polished specimens to the ores of many camps that had been rich silver producers but had not been studied geologically since such methods of study were perfected. If the results here reported appear to be fragmentary and to lack completeness according to the standards of a regional report, it must be remembered that for each district only such information could be used as was readily obtainable in the course of a very brief field visit. The results in so far as they show a primary origin for the silver minerals in many ores appear amply to justify the work in the encouragement which they offer to deep mining, irrespective of more purely scientific results. -
Solution Deposition of a Bournonite Cupbsbs3 Semiconductor Thin Film from the Dissolution of Bulk Materials with a Thiol-Amine Sol- Vent Mixture Kristopher M
Solution Deposition of a Bournonite CuPbSbS3 Semiconductor Thin Film from the Dissolution of Bulk Materials with a Thiol-Amine Sol- vent Mixture Kristopher M. Koskela, Brent C. Melot, and Richard L. Brutchey* Department of Chemistry, University of Southern California, Los Angeles, CA 90089, United States ABSTRACT: There is considerable interest in the exploration of new solar absorbers that are environmentally stable, absorb through the visible, and possess a polar crystal structure. Bournonite CuPbSbS3 is a naturally occurring sulfosalt mineral that crys- tallizes in the non-centrosymmetric Pmn21 space group and possesses an optimal band gap for single junction solar cells; however, the synthetic literature on this quaternary semiconductor is sparse and it has yet to be deposited and studied as a thin film. Here we describe the ability of a binary thiol-amine solvent mixture to dissolve the bulk bournonite mineral as well as inexpensive bulk CuO, PbO, and Sb2S3 precursors at room temperature and ambient pressure to generate an ink. The synthetic compound ink derived from the dissolution of the bulk binary precursors in the right stoichiometric ratios yields phase-pure thin films of CuPbSbS3 upon solution deposition and annealing. The resulting semiconductor thin films possess a direct optical band gap of 1.24 eV, an absorp- tion coefficient ~105 cm–1 through the visible, mobilities of 0.01-2.4 cm2 (V•s)–1, and carrier concentrations of 1018 – 1020 cm–3. These favorable optoelectronic properties suggest CuPbSbS3 thin films are excellent -
Investigation of the Incompatibilities of Cement and Superplasticizers and Their Influence on the Rheological Behavior
materials Article Investigation of the Incompatibilities of Cement and Superplasticizers and Their Influence on the Rheological Behavior Ursula Pott 1, Cordula Jakob 2, Daniel Jansen 2, Jürgen Neubauer 2 and Dietmar Stephan 1,* 1 Department of Civil Engineering, Building Materials and Construction Chemistry, Technische Universität Berlin, 13355 Berlin, Germany; [email protected] 2 Department of Geography and Geosciences, GeoZentrum Nordbayern, Friedrich-Alexander-University, 91054 Erlangen, Germany; [email protected] (C.J.); [email protected] (D.J.); [email protected] (J.N.) * Correspondence: [email protected] Received: 2 December 2019; Accepted: 18 February 2020; Published: 21 February 2020 Abstract: The rheological behavior of cement paste and the improvement of its flowability takes center stage in many research projects. An improved flowability can be achieved by the addition of superplasticizers (SP), such as polycarboxylate ethers (PCE). In order to be able to use these PCEs effectively and in a variety of ways and to make them resistant to changes in the environment, it is crucial to understand the influence of SPs on cement hydration. For that reason, the topic of this paper was the incompatibility of a specific SP and an ordinary Portland cement (OPC). The incompatible behavior was analyzed using rheological tests, such as the spread flow test and penetration test, and the behavior was compared by means of an ultrasound technique and explained by the phase content measured by in-situ X-ray diffraction (XRD) the heat evolution measured by calorimetry, and scanning electron microscope (SEM) images. We showed that the addition of the SP in a high dosage led to a prevention of the passivation of the most reactive and aluminum-containing clinker phases, aluminate and brownmillerite.