Scalable Synthesis of Cu–Sb–S Phases from Reactive Melts of Metal
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Large-Scale Hydrothermal Zoning Reflectedin The
Canadian Mineralogist Vol. 27, pp. 383-400 (1989) LARGE-SCALE HYDROTHERMAL ZONING REFLECTED IN THE TETRAHEDRITE-FREIBERGITE SOLID SOLUTION, KENO HILL Ag-Pb-Zn DISTRICT, YUKON J.V. GREGORY LYNCH* Department of Geology, The University of Alberta, Edmonton, Alberta T6G 2E3 ABSTRACT en argent se distinguent aussi par une augmentation dans Ie nombre de cations dans leur formule chimique. Le rap- The zoned Keno Hill vein system of central Yukon port Sb/ As demeure uniformement eleve. extends laterally from a Cretaceous plutonic-metamorphic center and surrounding quartz-feldspar veins, to (Traduit par la Redaction) carbonate-Ag-Pb-Zn deposits, and further to peripheral veins having epithermal characteristics. Seven distinct Mots-cles: zonation hydrothermale, nappe aquifere, tetra- mineralogical zones are recognized, and the entire sequence edrite, solution solide, plutonique, epithermal, altera- is continuous from east to west in a 4O-km belt. The fault- tion, district de Keno Hill, Yukon. and fracture-controlled veins are stratabound to the brit- tle moderately dipping Keno Hill Quartzite unit, of Mis- INTRODUCTION sissippian age. The unit is graphitic and appears to have acted as a large-scale hydrothermal aquifer, restricting fluid This paper concerns the large-scale nature of the flow during minera1ization and" development of zoning predominantly to the lateral direction. Tetrahedrite is dis- Keno Hill hydrothermal system. A broad and con- tributed along a 25-km-Iong portion of the system, and is tinuous sequence of mineral zoning can be the principal ore mineral of Ag. Both Ag/Cu and Fe/Zn documented within veins distributed along an exten- values in tetrahedrite are highest at the outer extremity of sive portion of the Keno Hill Quartzite, which is the the system, where freibergite dominates over tetrahedrite; main host rock to the ore in the area. -
Silver Sulphosalts in Galena from Espeland, Norway
Silver sulphosalts in galena from Espeland, Norway M. S. NAIK Naik, M. S.: Silver sulphosalts in galena from Espeland, Norway. Norsk Geo logisk Tidsskrift, Vol. 55, pp. 185-189. Oslo 1975. The silver-bearing phases in galena from Espeland are freibergite, unknown 'phase C' (PbuA&l!Sbto�), pyrargyrite, stephanite and hessite. The composi tions of these phases were determined by electron microprobe. Freibergite is homogeneous in composition with an average 35 percent silver. The average calculated atomic proportions (Cu,Ag,Fe)t2.�b4S12·4• deviate from the stoi chiometric composition (Cu,Ag,Fe,Znh2(SbAs)4S13 of tetrahedrite. It has been found that most of the silver present in the ore occurs in the silver phases and not in structural positions in the galena lattice. M. S. Naik, Mineralogisk-geologisk museum, Sars gate l, Oslo 5, Norway. Present address: lndian School of Mines, Dhanbad, Bihar, India. Galenas with high contents of bismuth and silver have been described from Espeland and other localities in Norway by Oftedal (1942). He proposed that Bi atoms enter into the PbS lattice without causing any distortion, if an equal number of Ag atoms enter simultaneously. The excess of Bi over (BiAg) was considered to be responsible for the octahedral parting in some of these galenas. In the present study of the silver bearing galena from Espeland it has been found that the galena contains inclusions of several silver-bearing phases, as well as native bismuth, while the galena itself contains only nor mal amounts of Ag and essentially no Bi. Geology of the Espeland deposit The Espeland deposit is located SW of Vegårshei church, between the farms Myre and Espeland in Aust-Agder fylke, southern Norway. -
Argyrodite Ag8ges6 C 2001-2005 Mineral Data Publishing, Version 1
Argyrodite Ag8GeS6 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic, pseudocubic. Point Group: mm2. Pseudo-octahedra, dodecahedra, cubes, or as combinations of these forms, in crystals as large as 18 cm. Also radiating crystal aggregates, botryoidal crusts, or massive. Twinning: Pseudospinel law {111}; repeated interpenetration twins of pseudododecahedra on {111}. Physical Properties: Fracture: Uneven to slightly conchoidal. Tenacity: Brittle. Hardness = 2.5–3 VHN = n.d. D(meas.) = 6.29 D(calc.) = 6.32 Optical Properties: Opaque. Color: Steel-gray with a red tint, tarnishes black; in polished section, gray-white with a violet tint. Streak: Gray-black. Luster: Strong metallic. Pleochroism: Very weak. Anisotropism: Weak. R1–R2: (400) 28.9–29.5, (420) 27.9–28.5, (440) 27.1–27.7, (460) 26.3–26.9, (480) 25.8–26.3, (500) 25.3–25.8, (520) 25.0–25.4, (540) 24.7–25.2, (560) 24.6–25.0, (580) 24.5–24.9, (600) 24.4–24.9, (620) 24.5–24.8, (640) 24.6–24.9, (660) 24.5–24.9, (680) 24.6–25.0, (700) 24.7–25.0 Cell Data: Space Group: Pna21. a = 15.149(1) b = 7.476(2) c = 10.589(1) Z = 4 X-ray Powder Pattern: Machacamarca, Bolivia. 3.02 (100), 1.863 (50), 2.66 (40), 3.14 (30), 2.44 (30), 2.03 (30), 1.784 (20) Chemistry: (1) (2) (3) Ag 75.78 74.20 76.51 Fe 0.68 Ge 3.65 4.99 6.44 Sn 3.60 3.36 Sb trace trace S 16.92 16.45 17.05 Total 99.95 99.68 100.00 (1) Chocaya, Bolivia. -
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. -
Minerals of the San Luis Valley and Adjacent Areas of Colorado Charles F
New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/22 Minerals of the San Luis Valley and adjacent areas of Colorado Charles F. Bauer, 1971, pp. 231-234 in: San Luis Basin (Colorado), James, H. L.; [ed.], New Mexico Geological Society 22nd Annual Fall Field Conference Guidebook, 340 p. This is one of many related papers that were included in the 1971 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States. -
Indium-Bearing Paragenesis from the Nueva Esperanza and Restauradora Veins, Capillitas Mine, Argentina
Journal of Geosciences, 65 (2020), 97–109 DOI: 10.3190/jgeosci.304 Original paper Indium-bearing paragenesis from the Nueva Esperanza and Restauradora veins, Capillitas mine, Argentina María Florencia MÁRQUEZ-ZAVALÍA1,2*, Anna VYMAZALOVÁ3, Miguel Ángel GALLISKI1, Yasushi WATANABE4, Hiroyasu MURAKAMI5 1 IANIGLA, CCT-Mendoza (CONICET), Avda. A. Ruiz Leal s/n, Parque San Martin, CC330, (5500) Mendoza, Argentina; [email protected] 2 Mineralogía y Petrología, FAD, Universidad Nacional de Cuyo, Centro Universitario (5502) Mendoza, Argentina 3 Department of Rock Geochemistry, Czech Geological Survey, Geologická 6, 152 00 Prague 5, Czech Republic 4 Faculty of International Resource Sciences, Mining Museum of Akita University, 28-2 Osawa, Tegata, Akita, 010-8502 Japan 5 Coal Business Planning Group, Coal Business Office, Resources & Power Company, JXTG Nippon Oil & Energy Corporation, 1-2, Otemachi 1-chome, Chiyoda-ku, Tokyo 100-8162 Japan * Corresponding author The Nueva Esperanza and Restauradora are two of the twenty-three veins described at Capillitas mine, an epithermal precious- and base-metal vein deposit located in northern Argentina. Capillitas is genetically linked to other minera- lizations of the Farallón Negro Volcanic Complex, which hosts several deposits. These include two world-class (La Alumbrera and Agua Rica) and some smaller (e.g., Bajo El Durazno) porphyry deposits, and a few epithermal deposits (Farallón Negro, Alto de la Blenda, Cerro Atajo and Capillitas). The main hypogene minerals found at these two ve- ins include pyrite, sphalerite, galena, chalcopyrite, tennantite-(Zn) and tennantite-(Fe). Accessory minerals comprise hübnerite, gold, silver, stannite, stannoidite and mawsonite, and also diverse indium- and tellurium-bearing minerals. -
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. -
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. -
Tetrahedrite (Cu, Fe, Ag, Zn)12Sb4s13 C 2001-2005 Mineral Data Publishing, Version 1
Tetrahedrite (Cu, Fe, Ag, Zn)12Sb4S13 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Cubic. Point Group: 43m. Crystals are tetrahedral, to 15 cm; common as groups of parallel crystals; massive, coarse or fine and granular to compact. Twinning: On {111} around [111] as twin axis; contact and penetration twins, commonly repeated. Physical Properties: Fracture: Subconchoidal. Tenacity: Somewhat brittle. Hardness = 3–4.5 VHN = 312–351 (100 g load). D(meas.) = 4.97 D(calc.) = 4.99 Optical Properties: Opaque, except in very thin fragments. Color: Flint-gray to iron-black to dull black, cherry-red in transmitted light; in polished section, gray inclining to olive-brown. Streak: Black to brown. Luster: Metallic, commonly splendent. Optical Class: Isotropic. n = > 2.72 (Li). R: (400) 32.1, (420) 31.8, (440) 31.7, (460) 31.7, (480) 31.8, (500) 32.0, (520) 32.2, (540) 32.4, (560) 32.4, (580) 32.3, (600) 32.0, (620) 31.5, (640) 31.0, (660) 30.6, (680) 30.2, (700) 29.8 Cell Data: Space Group: I43m. a = 10.23–10.55 Z = 2 X-ray Powder Pattern: Neugl¨uck mine, Wittichen, Black Forest, Germany. 3.00 (100), 1.831 (60), 1.563 (30), 2.61 (20), 1.056 (20), 3.69 (10), 2.46 (10) Chemistry: (1) (2) (3) (1) (2) (3) Cu 45.39 37.7 45.77 Fe 1.32 5.5 Ag 0.4 Sb 28.85 29.3 29.22 Pb 0.11 As trace 0.8 Zn 1.8 S 24.48 24.9 25.01 Total 100.15 100.4 100.00 (1) Bourg d’Oisans, France. -
Acanthite Ag2s C 2001-2005 Mineral Data Publishing, Version 1 Crystal Data: Monoclinic, Pseudo-Orthorhombic
Acanthite Ag2S c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic, pseudo-orthorhombic. Point Group: 2/m. Primary crystals are rare, prismatic to long prismatic, elongated along [001], to 2.5 cm, may be tubular; massive. Commonly paramorphic after the cubic high-temperature phase (“argentite”), of original cubic or octahedral habit, to 8 cm. Twinning: Polysynthetic on {111}, may be very complex due to inversion; contact on {101}. Physical Properties: Cleavage: Indistinct. Fracture: Uneven. Tenacity: Sectile. Hardness = 2.0–2.5 VHN = 21–25 (50 g load). D(meas.) = 7.20–7.22 D(calc.) = 7.24 Photosensitive. Optical Properties: Opaque. Color: Iron-black. Streak: Black. Luster: Metallic. Anisotropism: Weak. R: (400) 32.8, (420) 32.9, (440) 33.0, (460) 33.1, (480) 33.0, (500) 32.7, (520) 32.0, (540) 31.2, (560) 30.5, (580) 29.9, (600) 29.2, (620) 28.7, (640) 28.2, (660) 27.6, (680) 27.0, (700) 26.4 ◦ Cell Data: Space Group: P 21/n. a = 4.229 b = 6.931 c = 7.862 β =99.61 Z=4 X-ray Powder Pattern: Synthetic. 2.606 (100), 2.440 (80), 2.383 (75), 2.836 (70), 2.583 (70), 2.456 (70), 3.080 (60) Chemistry: (1) (2) (3) Ag 86.4 87.2 87.06 Cu 0.1 Se 1.6 S 12.0 12.6 12.94 Total 100.0 99.9 100.00 (1) Guanajuato, Mexico; by electron microprobe. (2) Santa Lucia mine, La Luz, Guanajuato, Mexico; by electron microprobe. (3) Ag2S. Polymorphism & Series: The high-temperature cubic form (“argentite”) inverts to acanthite at about 173 ◦C; below this temperature acanthite is the stable phase and forms directly. -
Ag-Pb-Sb Sulfosalts and Se-Rich Mineralization of Anthony of Padua
minerals Article Ag-Pb-Sb Sulfosalts and Se-rich Mineralization of Anthony of Padua Mine near Poliˇcany—Model Example of the Mineralization of Silver Lodes in the Historic Kutná Hora Ag-Pb Ore District, Czech Republic Richard Pažout 1,*, Jiˇrí Sejkora 2 and Vladimír Šrein 3 1 Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic 2 Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, 193 00 Prague 9–Horní Poˇcernice,Czech Republic 3 Czech Geological Survey, Klárov 3, 118 21 Prague 1, Czech Republic * Correspondence: [email protected]; Tel.: +420-220444080 Received: 3 May 2019; Accepted: 6 July 2019; Published: 12 July 2019 Abstract: Significant selenium enrichment associated with selenides and previously unknown Ag-Pb-Sb, Ag-Sb and Pb-Sb sulfosalts has been discovered in hydrothermal ore veins in the Anthony of Padua mine near Poliˇcany, Kutná Hora ore district, central Bohemia, Czech Republic. The ore mineralogy and crystal chemistry of more than twenty silver minerals are studied here. Selenium mineralization is evidenced by a) the occurrence of selenium minerals, and b) significantly increased selenium contents in sulfosalts. Identified selenium minerals include aguilarite and selenides naumannite and clausthalite. The previously unknown sulfosalts from Kutná Hora are identified: Ag-excess fizélyite, fizélyite, andorite IV, andorite VI, unnamed Ag-poor Ag-Pb-Sb sulfosalts, semseyite, stephanite, polybasite, unnamed Ag-Cu-S mineral phases and uytenbogaardtite. Among the newly identified sulfides is argyrodite; germanium is a new chemical element in geochemistry of Kutná Hora. Three types of ore were recognized in the vein assemblage: the Pb-rich black ore (i) in quartz; the Ag-rich red ore (ii) in kutnohorite-quartz gangue; and the Ag-rich ore (iii) in milky quartz without sulfides. -
Mineralogical Studies on Japanese Sphalerite
Title Mineralogical Studies on Japanese Sphalerite Author(s) Togari, Kenji Citation Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy, 10(4), 703-734 Issue Date 1961-03 Doc URL http://hdl.handle.net/2115/35922 Type bulletin (article) File Information 10(4)_703-734.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP MINERALOGICAL STUDIES ON JAPANESE SPHALERXTE By Kenji TOGARI Contributions from the Department of Geology and Mineralogy, Faeulty of Science, Hol<kaido Unive' rsity. No.・ s26 CONTENTS I. Introductiori ........,..,......,.......,..,......,.,...........,,703 II. Oecurrences .....,........,...,.,............,',.,.....,..,,.,...705 III. Morphology of sphalerite .....,..,..,....,...,.,...,...,..,,.....708 III-1 Forms and localities ..................,,...,.,.,,,.,,.....708 III-2 H-, F-, and P-value.......,,...,,.,....,.........,...,..,708 III-3 Twinning ..,.......,...,...............,.,.......,....,..714 IV. Chemical composition of sphalerite..,....,.....,.......,.,........714 IV-1 Chemieal analyses......,.,..........,....,...,.....,.....・・715 IV-2 Sulphur cornponent............,...,..,,......,..,...,....,.717 IV-3 Minor elements.................,.....,.,.,.,..,,...・-・・・・・717 V. Problem on structure of sphalerite......,..,v.,.,....,...........720 V-1 Variation of lattice eonstant...,....,.,...,.......,...,.....721 V-2 PolymoT'phism and polytype ..,...,......,......,..........,724 VI. Colour of sphalerite,...........................,...........,.,...725