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Home , Acanthite, Vulcanite

Index acanthite, 76, 151, 160 occurrence, 74 Acme mine, 121, 122 thermometry, 169 Acupan mine, Philippine Islands, 184, 185, assays 186, 187 by districts, 118 adularia, 101 by mines, 119-121 age relations - , 19 metallic , 129-132 native tellurium-bearing ores, 66 types, 23 associations, hypogene vein minerals, 127-129 Chi-square tests, 113-115 aikinite, 92-93 frequency of occurrence, 111-112 Alpine Horn mine, 58, 74, 83, 85, 91, 97, pairs, 111-112 128, 139, 202, 203, 212, 213, 218, 219 preferential nature of, 113-115 altaite summary, 111-115 diagnostic properties, 45 system Au-Ag-Te, 136-137 distribution, 125 Atlantic mine, 120 occurrence, 76-77 Au-Ag-Te, the system, 133-148 alteration (see alteration, wall applied to Boulder ores, 135-148 rock alteration) associations of tellurium, 139 amalgam, 68, 69 degree of equilibrium, 146-148 Ambrose, J. W„ 185 effects of cooling, 147-148 American mine (Gold Hill district), 58, 74, experimental relations, 133-135 99, 222, 223 hessite inversion, 141, 169 American mine (Magnolia district), 58 melting phenomena, 138-139 ankerite-, 96 minerals, 132-133 aplite, relation of ore to, 12 observed associations, 136-138 Archer mine, 74, 168, 169, 176 origin of hessite- intergrowths, argentian tetrahedrite, 94 142-143 origin of late veinlets, 143 tellurium grease, 76, 151, 160 origin of -hessite intergrowths, occurrence, 76, 151 141-142 stability, 160 preferential associations, 115 Argall, G. O., Jr., 101 the join AuTe2-AuAgTe4, 139 Argo mine, 19 thermometry, 168-169 arsenopyrite Axelrod, J. M., 104 barometry, 166, 168 azurite, 151

227

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 228 TELLURIDE ORES OF BOULDER COUNTY, COLORADO Baker, G., 48,141 Bray, J. M., 178 barite, 97-98 breccia reefs Barton, P. B., Jr., 154 as mineralogicàl controls, 126 base metals (see also individual of) as structural controls, 22, 29-32 production of, 7 distribution, 10, 30 telluride ores, 123 general character, 15-16 Becking, L. G. M. B„ 153, 154, 156 British Columbia tellurides, 184-185 Berek, M., 36 Buena ("Wano") mine, 16, 20, 21, 27, 29, Berman, A., 81 31, 32, 33, 58, 67, 78, 79, 80, 86, 88, Berry, L. G., 35, 47, 80, 109, 141 89, 95, 104, 122, 126, 153, 175, 218, biotite latite 219 as source of vein components, 177-178 bulk compositions distribution, 30-31 telluride ores, 138 gold content, 31-32 Bull of the Woods reef, 16, 30 petrography, 14, 15 bull veins, 16 relation to telluride deposits, 11, 14, 15, Bumble Bee mine, 58, 68, 104, 204, 205 31, 32 Burlington mine, 19 volatile content, 32, 180-181 calaverite bismuthinite, 74 diagnostic properties, 46 Bjerrum, J., 158 distribution, 125 Black Rose mine, 29, 31, 58, 69, 74, 79, 86, melting, 168 88, 91, 104, 122, 216, 217 occurrence, 77-79 black tellurium, 81-82, 87 relation to krennerite, 139, 183-185 Blanchard, F. N., 175 X-ray data, 77-78 Blue "vein," 16 Cabri, L. J., xvi, 46, 48, 50, 51, 109, 130, Bondholder mine, 58, 69, 71, 92, 109, 204, 131, 133, 134, 135, 136, 138, 139, 140, 205 141, 142, 143, 144, 145, 146, 147, 168, Bonorino, F. G., 25, 26, 27, 28, 55, 100, 169, 184 172, 173, 177 , 96-97 Borchert, H., 50, 51,139 Callow, K. J., 48, 141, 184, 185 , 76 calomel, 94, 95, 152 Boulder County Cameron, E. N., 36, 37,152 geologic map, 10 carbonates, 96-97 geologic setting, 9-16 Carpenter, R. H., 37 mining districts, 7 Cash mine, 7, 15, 58, 64, 74, 81, 82, 85, 88, mining history, 7 97, 122, 123, 124, 212, 213 deposit, 17 centers of production ore deposits, 17-23 definition, 29 physiography, 165-166 map, 30 production, 7 mineralogy of, 124-126 structures, 15-16 relation to breccia reefs, 29-32 telluride belt, 9, 10 cerargyrite, 95, 158 district, 17, 21, 22 Chace, F. M., x Boulder Creek Granite chalcedony, 102 distribution, 10 , 76, 151 hydrothermal alteration, 25-28 petrography, 12 exsolution, 74, 124 source, 12 occurrence, 67-70 trace elements, 178 Chancellor mine, 19 Bowie, S. H. V., 39, 40, 41 chemical analyses boxworks, limonite, 105 altered wall rocks, 28 bravoite chi-square tests occurrence, 75 mineral associations, 113-114 thermometry, 169 Christ, C. L., 153, 170

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 INDEX 229 Christie, O. H. J., 99 duration of mineralization, 170-172, 179- , 75 181 Clark, F. W., 89 Eckel, E. B„ 63, 66, 68, 75, 77, 78, 89, 98, Clark, L. A., 166, 168, 169 185 classification Eclipse mine, 59, 76, 84, 106, 214, 215 Boulder County deposits, 186-187 Edwards, A. B., 48 telluride deposits, 183-186 E/i-ac]- phase relations clay minerals, 25-27, 153 in system Ag-Te-S-H-O-Cl, 158-159 Cloke, P. L., 156 Eh-pH phase relations Cold Spring-Red Cloud mine, 7, 14, 58, 64, in system Ag-Te-S-H-O-Cl, 158-161 66, 69, 74, 77, 80, 82, 85, 87, 89, 92, in system Au-H-O-Cl, 156 97, 99, 107, 122, 150, 151, 210, 211, in system K-Fe-S-H-O, 160-163 212, 213, 220, 221 in system Te-H-O, 153-155 Colorado mine, 7, 58, 59, 64, 70, 74, 76, 82, Eldora district, 9, 107 93, 96, 97, 101, 123, 150, 156, 202, electron microprobe analyses, 35-36, 224, 203, 204, 205, 206, 207, 220, 221, 224, 225 225 elevations Colorado mineral belt, 9, 11 erosion surfaces, 167 coloradoite mine workings, 122 cuprian, 79 Ellen mine, 120 diagnostic properties, 47 Emancipation mine, 22, 27, 32, 59, 64, 65, distribution, 125 67, 68, 72, 78, 92, 96, 104, 122, 149, occurrence, 79-80 202, 203, 204, 205, 208, 209, 218, 219 contact metamorphic deposits, embolite, 95 tellurides, 183 Emmett mine, 19 cooling Emmons, W. H., 156, 158 equilibrium during, 147-148 Empress Josephine mine, Kerber Creek dis- intergrowths produced, 141-143 trict, 80 phase relations, 136 Empress mine, 59, 80, 88, 89, 169, 210, post-depositional, 176 211,216,217 empressite combining tendency, 70 diagnostic properties, 47 Copper King mine, 178 occurrence, 80-81 covellite, 151 stability, 148, 149 Cripple Creek, Colorado, 109,185, 186 synthesis, 135 Croesus mine, 18, 59, 65, 75, 94, 101, 104, enargite, 19 109, 202, 203 Endlich, F. M., 66, 69, 75, 77, 78, 89, 95, Dana, E. S., 63, 99 99, 103 Dana, J. D., 63, 99 enrichment, supergene, 150, 160 Davis, J. H., 37 equilibrium deformation during cooling, 147-148 during mineralization, 128-129, 180 during initial deposition, 146-147 native tellurium, 68 erosion surfaces, 165-168 sylvanite, 83, 91 eutectoid intergrowths, 138 Deltombe, E., xvi, 153,155, 179 Evening Star mine, 96 depths exsolution indicated by arsenopyrite, 166,168 hessite and petzite, 87,141-142 mines, 20, 118, 122 , 74, 124 ore deposition, 165-166 versus replacement, 144 oxidation, 149 ferberite present water table, 149 tungsten ores, 21 de Zoubov, N., xvi, 153, 155, 179 occurrence, 100-101 dolomite (see ankerite-dolomite) ferrotellurite, 99, 151 Dun Raven mine, 66 Flattop surface, 165-167

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 230 TELLURIDE ORES OF BOULDER COUNTY, COLORADO fluid inclusions goethite fluorite, 175 boxworks, 105 quartz, 174-175 hypogene, 105 salinity, 174 occurrence, 105, 151 fluid inclusion thermometry, 173-176 relations to jarosite, 98-99, 152, 160-163 fluorescent minerals stability, 160-163, 170 calomel, 94-95 thermometry, 170 , 101 gold (see also gold, native) tests for, 94 assays, 117-122 fluorite discovery, 7 fluid inclusions, 175 lead-silver ores, 19 occurrence, 95 placer deposits, 7, 150 pitchblende in, 19, 95 production, 7 thermoluminescence, 175-176 sources, 177-178 fluorspar deposits supergene geochemistry, 156-158 age relations, 23 Gold Hill district distribution, 10 assay record, 118-122 elevations of mines, 122 general character, 18, 19 erosion surfaces, 167 Forlorn Hope mine, 84 Laramide stocks, 14 Fortune mine, 121, 122 location, 9, 10 Fortune reef, 16, 17, 30 productive centers, 29-31 Fournier, R., 28, 172, 173 wall rocks, 11 Fourth of July mine, 59, 76 gold, native Franklin mine, 59, 89, 90, 96, 214, 215 distribution, 125 freibergite, 18 fineness, 65 Freiberg mine, 59, 69, 92 indentation hardness, 42 Frondel, C., 81, 99 rusty gold, 63 Front Range mineral belt occurrence, 63-66, 150 fault movements, 32 reflectivity, 39, 40 intrusive sequence, 23, 178 gold telluride deposits (see telluride de- ore controls, 11 posits) relation to telluride belts, 9 Golden Age mine, 59, 69, 83, 106, 165 Frueh, A. J., Jr., 47, 48, 50, 141 Golden Bell mine, 89, 90 Furbish, W. J., 160 Golden Harp mine, 59, 65, 79, 96 Galbraith, F. W., 45, 185 Good Hope mine, Vulcan, Colorado, 186 , 70 Goodwin, A. M„ 184, 185 Galopin, R., 43 goyazite, 99-100 gamma phase grade (see assays) breakdown, 142-143, 145, 146, 147 Grand Central mine, 26, 122 occurrence, 109 Grand Republic mine, 20, 101 paragenesis, 130, 131 Grandview mine, 15, 18, 59, 89, 94, 100, synthesis, 135 101 Garrels, R. M., 153, 170 Graphic mine, 101, 121 Genth, F. A., 5, 66, 77, 78, 79, 89, 92, 98, Gray Copper mine, 59, 93, 220, 221 Gray Eagle mine, 76, 107, 174, 176, 180, 99, 103, 151 222, 223 Gladiator mine, 59, 69, 102, 104 Grouse mine, 59, 109 Gladys mine, 65 guides to ore Glassford Creek, Australia, 183 character of quartz, 103 Goddard, E. N., xvi, xvii, 5, 7, 9, 11, 12, 13, jarosite, 98 14, 15, 17, 18, 19, 23, 25, 26, 29, 31, roscoelite, 65, 105 32, 55, 66, 74, 75, 79, 94, 95, 97, 100, tellurium grease, 76 101, 103, 104, 123, 149, 150, 165, 176, Guilbert, J. M., 37 178 Guiteras, J. R., 20

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 INDEX 231 Gutzeit, G., 43 Interocean mine (see Osceola-Interocean gypsum, 98, 99 mine) halides intrusion breccia (see also biotite latite) occurrence, 94-96 emplacement, 180-181 silver, 95, 150-151,158-160 relation to telluride ore, 11, 14, 31-32 Hallimond, A. F., 36 Ishibashi, M., 183 hamlinite, 99-100 iodyrite, 95 Hase, D. R., 37 dike, 11, 13 Hawley, J. F., 50, 184,185, 186 Ives, R. L., 66 Headden, W. P., 66 Jamestown district Hedley, British Columbia, 183 assays, 118-122 Heinrich, E. W., 104 elevations of mines, 122 Helke, A., 50, 183, 185 erosion surfaces, 167 fluorspar deposits, 18-19 breccia reefs, 16 Laramide stocks, 14 occurrence, 106, 152 location, 9, 10 specular, 106 productive centers, 29-31 Hemley, J. J., 28, 172, 173 wall rock alteration, 26 Herald mine, 59, 97, 100,101 wall rocks, 11, 12 Hercules mine, 120 zoning, 31 Hess, F. L., 99,100 jarosite hessite as guide to Ore, 98 diagnostic properties, 47-49 geochemistry, 160-163 distribution, 125 occurrence, 98-99 inversion, 141, 169 relations to goethite, 98-99, 152, 160-163 occurrence, 81-82 stability, 160-163 supergene, 82,151,160 Jennings, E. P., 66 twinning, 48, 141, 169 lohn Jay mine, 27, 29, 32, 60, 64, 66, 67, hessite-petzite intergrowths, origin, 141-142 68, 76, 78, 83, 84, 91, 95, 97, 102, 103, hessite-sylvanite intergrowths, origin, 142- 122, 126, 151, 187, 202, 203, 206, 207, 143 208, 209, 212, 213, 214, 215, 224, 225 Hewitt, C. H„ 104 Jones, W. R., 28, 172, 173 Hiemstra, S. Q., 35 Kalgoorlie, Australia Hillebrand, W. F., 84 classification, 183 Hodge, E. T., 156, 158 cuprian coloradoite, 79 Holser, W. T., 152 gold-coloradoite association, 65, 80, 115 Honea, R. M., 47, 49, 52, 80, 88, 89, 133, gold- intergrowths, 88 135, 139, 148,169 hessite, 48 Hoosierreef, 15, 16, 17, 19, 30 Kaplan, I. R., 153, 154, 156 horn quartz (see also quartz) Kekionga mine, 21, 60, 100, 101, 104, 222, definition, 102 223 Horsefal mine, 59, 74, 78, 80, 85, 88, 91, Kelly, W. C., 152, 156 109, 202, 203, 206, 207, 216, 217 Keystone mine, 60, 66, 79, 98, 99,104, 122 K-feldspar, secondary, 26-28, 173 hypogene associations (see associations, hy- Kerber Creek district, Colorado, 80 pogene) King Wilhelm mine, 60, 75, 85, 86, 94, 103, Idaho Springs formation, 9, 10, 11 104, 109, 210, 211, 214, 215, 216, 217, ilsemannite, 10 224, 225 indentation microhardness, 41-44 Kirkland Lake, Ontario, 50,184, 185 Ingersoll, A. C., 170,171 Kiukkula, K., 109, 135, 158 Ingersoll, L. R., 170, 171 Klevstov, P. V., 174 Ingram mine, 20, 22, 30, 32, 59, 60, 84, 89, kobellite, 93 93, 94, 96, 97, 98, 122, 216, 217, 218, Koschman, A. H., 109,185 219, 224, 225 kostovite, 46

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 232 TELLURIDE ORES OF BOULDER COUNTY, COLORADO Kracek, F. C., 48, 133, 141 Machol, R. E., 146, 169 krennerite , 168 diagnostic properties, 46 Magnolia district distribution, 124-125 as productive center, 29 formula, 139 assays, 118-122 melting, 169 elevations of mines, 122 occurrence, 83 erosion surfaces, 167 relations to calaverite, 139, 183-185 location, 9, 10 stability, 139-141, 148 wall rocks, 11 X-ray data, 77-78 Magnolia mine, 122 Ksanda, C. J., 48, 133, 141 magnolite, 98, 99, 151 Kullerud, G., 169 , 151 Lady Franklin mine, 60, 68, 70, 122, 218, Mancuso, J. J., 37 219, 220, 221 Mandarino, J. A., 99, 106 La Montezuma mine, Sonora, Mexico, 106 La Plata district, Colorado, 185 , 107 Laramide intrusives in primary ores, 97, 107 descriptions, 12-15 marcasite distribution, 10 occurrence, 70-71 relations of ore, 12, 13, 31 supergene, 71 trace elements, 178 Markham, N. L., xvi, 50, 51, 65, 80, 133, Larson, L. T., 37 134, 135, 136, 137, 138, 139, 141, 143, Last Chance mine, 61, 63, 79, 80, 82, 88, 144, 146, 183, 184, 185, 186 106, 151, 160, 212, 213, 216, 217 Maxwell reef, 15, 16, 29, 30 leaching, hypogene, 68, 103, 177-178 melonite lead, combining tendency, 70 contact printing, 43, 45 lead-silver deposits diagnostic properties, 49 age relations, 23 distribution, 125 as sources of metals, 178 occurrence, 84-86 general character, 17, 18 phase relations, 146 minerals, 94 melting phenomena, 138-139 zoning, 123 Melvina mine, 22, 61, 74, 83, 95, 97, 101, leaf gold, 65 122 Lemmlein, G. G., 174 , native Levandowski, D. W., 104 occurrence, 68-69, 152 Levinson, A. A., 104 origin, 152 lime silicates, 168 test for, 69 limonite (see goethite) Merwin, H. E., 162 Lindgren, W. T., 75,103, 107, 184, 185, 187 metals, sources, 177-178 Little Johnny mine, 18, 61, 86, 94, 109 miargyrite, 94 Little Maud mine, 121 Little Pittsburgh mine, 121 microchemical tests (see also diagnostic Livingston reef, 15 properties under individual tellurides) Locke, A., 152 barite, 97 Logan mine, 14, 15, 19, 21, 29, 31, 61, melonite, 43, 44 90, 100, 101, 104, 150, 208, 209, mercury, native, 69 210, 211 phosphate mineral, 100 Loughlin, G. F„ 109, 185 roscoelite, 104 Lovering, T. S., xvi, xvii, 5, 7, 9, 11, 12, tetrahedrite, 94 13, 14, 15, 17, 21, 23, 25, 26, 28, 29, unidentified silver telluride, 108 31, 32, 55, 66, 69, 74, 75, 79, 80, 94, mineral associations (see associations, 95, 97, 99, 100, 101, 102, 103, 104, hypogene) 105, 123, 147, 149, 150, 165, 166, mineral A (unidentified), 107-109 170, 171, 177, 178, 180, 181 mineral B (unidentified), 109

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 INDEX 233 mines, telluride (see also individual mine structural controls, 32-33 listings) temperatures, 168-177 assays, 119-122 ore fluids locations, 4 composition, 179 elevations, 122 effects on iron sulfides, 73 maps, 27 regional variation, 126 mineralogy, 58-62 source, 31 sections, 22 source of components, 177-178 mining structural controls, 29-32, 126 depths, 20, 118, 122, 149 temperatures, 168-177 history, 7 ore-forming environment, 165-181 methods, 21 Osceola-Interocean mine, 27, 61, 71, 75, Mitchell, R. S., 99, 106 87, 104, 122, 169, 201, 206, 207, 210, , 75 211, 214, 215 production, 75 Overland Mountain peneplain, 165-166 Monitor tunnel, 61, 204, 205 Oya mine, Japan, 183 montanite, 99, 151 oxidation (see supergene alteration) montbrayite, 46, 77-78, 135 oxides, occurrence, 105-107 Moore, D., 153, 154, 156 Palache, C„ 81 Morimoto, N., 168 paragenesis Moscow mine, 93 general vein sequence, 127-129 Mountain Lion mine, 65, 75, 79, 107, 121, metallic sequence, 129-132 122 summary, 131-132 Nagyag, Rumania, 185 supergene, 157-158 nagyagite paragenetic diagrams, 128, 129 diagnostic properties, 49 paratellurite occurrence, 86 occurrence, 106-107 Nakhla, F. M., 43 stability, 154 Nancy mine, 61, 73, 78, 86, 87, 93, 104, Pauling, L., 135 202, 203, 206, 207, 208, 209, 210, Peacock, M. A., 46 211, 214, 215 pegmatites, relations of ore to, 12, 22 native elements, 63-69 Peter, F., 40 Nederiand district (see tungsten district, petzite tungsten deposits) diagnostic properties, 49-52 New Era mine, 19, 61, 65, 72, 96 distribution, 125 New Rival mine, 61, 83, 104 isotropism, 49-51 nickel occurrence, 86-87 combining tendency, 75 petzite-hessite intergrowths Precambrian deposit, 17, 178 origin, 141-142 telluride, 43, 45, 49, 84-86, 125, 146 phase relations Nil Desperandum mine, 30 in system Ag-Te-S-H-O-Cl, 158-161 opal, 102, 153 in system Au-Ag-Te, 133-148 Ophir mine, 121, 122 in system Au-H-O-Cl, 156 ore bodies in system Fe-As-S, 166, 168 guides to, 65, 76, 98, 103, 104, 105 in system K-Fe-S-H-O, 160-163 size, 20, 21 in system Ni-Te, 146 structural controls, 32-33 in system Te-H-O, 153-155, 179 vertical persistence, 20 phosphate mineral, 99-100 ore deposition Pickwick mine, 121 depths, 165-168 pitchblende in fluorite, 19 duration, 170-172, 179-181 placer deposits, 7, 150 pressures, 166 Plough Boy mine, 61

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 234 TELLURIDE ORES OF BOULDER COUNTY, COLORADO polarization figures, 37, 38, 108 versus exsolution, 144 , 94 versus open filling, 33, 103 Poorman (Poorman's Relief) mine, 7, 15, rhodochrosite, 97 29, 30, 61, 69, 70, 75, 79, 80, 88, 89, Richmond mine, 15, 61, 83, 220, 221 90, 93, 94, 95, 96, 97, 100, 101, 104, rickardite, 87-88, 152 105, 106, 107, 109, 122, 126, 206, Rip Van Dam mine, 120, 122 207, 210, 211, 218, 219, 220, 221, Roedder, E., 28, 172, 173, 174, 180 222, 223 roscoelite Poorman reef, 16, 17, 19, 29 association with native gold, 65 porphyries, 11, 12, 13 as guide to ore, 104 Posnjak, E„ 162 occurrence, 103-105 rotation properties, 36-37 Potato Patch mine, 61, 63, 88, 109, 222, Rowland, J. F., 47, 141 223 rusty gold, 63, 105, 150, 158 Pough, F. H., 99 Sac and Fox mine, 121 Pourbaix, M., xvi, 153, 155, 179 Santa Rosa mine, Sonora, Mexico, 106 Precambrian Sato, M., 153, 154, 156 nickel deposit, 17, 178 Schaller, W. T„ 99, 100 rocks, 10, 11, 12, 31 scheelite, 101 shear zones, 15 Schmaltz, R. F., 154 telluride deposits, 183-186 Schmitt, H. H., 160 pressures, depositional, 166, 168 Schouten, C., 50 production Schwarzenbach, G., 158 centers of, 29-32 Searls, F„ Jr., 185 gold, 7 selenite, 98 molybdenum, 75 Senator Hill mine, 121 silver, 7 Shirley mine, 61, 79, 83, 97, 98, 101, 102, tellurium, 7, 8 104 vanadium, 104 Short, M. N., 43, 46, 104 Prussian mine, 121 siderite, 97 , 93, 94 silicates, 101-105 , 71-73 Sillen, L., 158 pyritic-gold deposits Silliman, B., Jr., 66, 89 age relations, 23 silver (see also silver, native) general character, 19, 20 assays, 117-122 as source of metals, 178 enrichment, 150-151, 160 pyrophyllite, 172 halides, 95 quartz lead-silver ores, 19 as guide to ore, 103 zone, 150-151 fluid inclusions, 174-175 production, 7 occurrence, 102-103 Radtke, A. S„ 79 supergene geochemistry, 158-161 Ramdohr, P., 46, 50 sources, 177-178 Ransome, F. L., 185 unidentified telluride, 107-109 Red Cloud mine (see Cold Spring-Red silver, native Cloud mine) Red Signe mine, 21, 100, 101 occurrence, 69, 150-151 reflectivities, 37-41, 108 stability, 158-160 regional zoning, 123-126 Silver Plume Granite replacement distribution, 10 among tellurides, 83, 143-146 petrography, 12 quartz, 103 trace elements, 178 roscoelite, 104 Sindeeva, N. D., 46, 50, 52 sylvanite, 90 Slide mine, 15, 20, 21, 22, 23, 27, 32, 62, origin of eutectoid intergrowths, 138 64, 65, 76, 77, 96, 122, 124, 204, 205, veinlets, 143-146 208, 209

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 INDEX 235 Smith, J. A., 69, 77, 78, 95, 99 occurrence, 89-92 Smuggler mine, 27, 29, 32, 33, 62, 64, 65, X-ray data, 77-78 66, 74, 76, 79, 80, 87, 88, 90, 106, sylvanite-hessite intergrowths 122, 126, 187, 202, 203, 216, 217, origin, 142-143 218, 219, 222, 223 Tatge, E., 168 Sorem, R. K., 37 Taylor, K., 41 Sparkling Jewell mine, 62 tellurates, 99, 151 specularite, 106 telluride belt sphalerite definition, 9 exsolution, 74, 124 districts within, 9, 10 occurrence, 73-74 general features, 9-11 sponge tellurium, 68, 130 geologic setting, 9-16 Standard reef, 16, 30 physiography, 165-168 Stanley mine, 20, 62, 74, 92, 175, 222, 223 relation to Front Range mineral belt, 9 statistics relation to tungsten district, 21 assay record, 117-122 structural features, 15-16 mineral associations, 113-115 telluride deposits , 94 age relations, 23 Sterling mine, 62 assays, 66, 117-122 Stillwell, F. L., 48, 63, 65, 80, 81, 88, 141, classification, 183-187 185 cross sections, 22 stromeyerite, 75-76 discovery, 5 structural controls distribution, 4, 10 local, 22, 27, 32-33 extent, 20, 21 regional, 29-32 general character, 20, 21 stuetzite geologic setting, 11-16 breakdown of metastable, 143, 148 location, 4, 9, 10 diagnostic properties, 52 maps, 27 occurrence, 88-89 mineral associations, 111-115 Success mine, 104 production, 7 Sudbury, Ontario, 186 relation to biotite latite, 11,14 Sugarloaf district, 9, 11, 93 structural controls, 29-33 sulfates, 97-99 supergene alteration, 149-163 sulfides, 69-76 thermometry, 168-177 sulfosalts vein minerals, 56-57, 63 lead-silver ores, 18 wall rock alteration, 25-28 occurrence, 92-94 zoning, 123-126 unidentified, 109 telluride minerals sulfur, source, 178 abundances, 56-63 supergene alteration, 149-163 as environmental indicators, 168, 183-186 chemistry, 153-163 contact metamorphic deposits, 183 effect on assays, 117-118 diagnostic properties, 45-54 enrichment by, 150, 160 distribution, 123-126 extent, 149-150 identification, 35-54 products, 150-153 indentation hardnesses, 41-44 Swandyke Hornblende Gneiss, 10, 11 magmatic deposits, 186 Swanson, H. E., 106, 154, 168 microchemical tests, 43, 45 Switzer, G., 106, 154 occurrence, 76-92 sylvanite polarization figures, 37-38 deformation, 83, 91 Precambrian deposits, 183-186 diagnostic properties, 46 reflectivities, 37-41 distribution, 125 rotation properties, 36-37 melting, 169 Tertiary volcanic deposits, 183-186

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 236 TELLURIDE ORES OF BOULDER COUNTY, COLORADO tellurite relation to telluride deposits, 21, 22, 23, occurrence, 107 180-181 stability, 154 wall rock alteration, 25-28 tellurites, 99, 151 tungsten district tellurium (see also tellurium, native) general, 17, 21, 22 recovery, 7-8 location, 10 sources, 178 Tweto, O. L., xvi, 5, 11, 12, 13, 15, 21, 25, supergene geochemistry, 153-155 26, 27, 28, 31, 32, 69, 80, 94, 100, 101, tellurium grease, 76, 151, 160 102, 105, 147, 165, 170, 171, 177, 179, tellurium, native 180, 181 deformation, 68 unidentified minerals, 108-109 diagnostic properties, 53 in fluorite, 19 distribution, 125 Uytenbogaardt, W., 35, 45, 48, 50 melting, 169-170 vanadium ore, 104 occurrence, 66-68 Van Rensburg, W. C. J., 37 sponge variety, 68 Van Tuyl, F. M., 165 supergene, 68, 151, 154 Vatukoula, Fiji Islands, 183, 184, 185, 186, Temborine mine, 69, 121 187 temperatures of ore vein fissures, 16 deposition (see also thermometry), 168- vein minerals 177 abundances, 56-63 tennantite, 19 associations, 111-115 Terziev, G., 46 descriptions, 55-109 distribution, local, 123 tetradymite distribution, regional, 123-126 diagnostic properties, 53-54 tabulations, 56-57, 63 occurrence, 92 veinlets, replacement, 143-146 tetrahedrite, 93-94 vulcanite, 70,151 thermoluminescence of fluorite, 175-176 Wagner, C., 109, 135, 158 thermometry Wahlstrom, E. E., 5, 66, 67, 79, 84, 85, 123, Au-Ag-Te minerals, 168-169 130, 165, 166 arsenopyrite, 169 wall rocks bravoite, 169-170 hosts to ore, 32-33 fluid inclusions, 173-176 sources of vein components, 177-178 hypogene goethite, 170 heating, 170-172 qualitative, 168 hydrothermal alteration, 25-28, 170-173, summary, 176-177 177-178, 180 wall rock alteration, 170-173 Late Cretaceous-Early Tertiary, 12-15 Thompson, J. B„ Jr., 146 Precambrian, 11-12 Thompson, R. M., 35, 45, 46, 49, 50, 80, 89, trace elements, 178 92, 109, 184, 185, 186 wall rock alteration Thomson, J. E., 185 chemical exchanges during, 177-178 Threadgold, I. M., 152 duration, 180 Todd, E. W., 184, 185 general character, 25-28 Tolman, C. F., 185 thermometry, 170-173 Toulmin, P., Ill, 154 Ward district, 9 Tunell, G., 85, 89, 135, 152, 185, 186 Warren, H. V., 185 tungstates, 100-101 water table, present depth, 149 tungsten deposits weissite(?), 109,151 age relations, 23, 100-101 Westrum, E. F., Jr., 146 distribution, 10 White Crow mine, 62, 68, 69, 80, 92, 102, general character, 21-22 128, 204, 205 hypogene goethite, 105 Wilkerson, A. S., 5, 66, 79, 95,149 quartz, 99-100 Williams, D„ 43

Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/953814/mem109-bm.pdf by guest on 01 October 2021 INDEX 237 Williams, S. J., 99, 106 roscoelite, 104 Winona mine, 62, 85, 214, 215 sylvanite, 77-78 wire gold, 64, 149 tetradymite, 53 wire silver, 69 unidentified sulfosalt, 109 woodhouseite, 99-100 unidentified telluride, 108 Worley, B. W., Jr., 48, 141, 184, 185 X-ray fluorescence "x" phase general methods, 35 breakdown, 141-142, 145-146, 147, 169 j'arosite, 99 paragenesis, 131 unidentified telluride, 108 synthesis, 135 Yellow Pine mine, 14, 15, 18, 75 X-ray diffraction Zobell, O. J., 170, 171 arsenopyrite, 168 zoning calaverite, 77-78 local, 123 general methods, 35 mineralogic, 123-126 krennerite, 77-78 different ore types, 31 minerals confirmed by, 55-57 goethite and jarosite, 98-99, 152, 160-163 paratellurite, 106 gold and silver, 118, 119, 122 petzite, 50 regional, 123-126

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