 | | Journal (article/letter/editorial) |
| combining the commodity (lines) shown by numbers plus lower caps with the host rocks or structure (columns)...Ceriopyrochlore Cerite Cerussite Chabazite-(Ca) Chalcedony Chalcocite Chalcomenite Chalcophanite Chalcopyrite...Freibergite Fuchsite (chromium muscovite) Gahnite Galena Galkhaite Gallite Gallobeudantite Garnet (Ce,...Zr)(Si2O7)2OF3 Hg2I2 Ag2Hg3 Pb (Zn,Cu)(OH)(VO4) chrom chalcedony Na3Ti3.6 Nb0.4(Si2O7)2O4·4(H2O) KAl2(Si3Al)O10(OH...Pb) may be won at a profit from ore minerals, e.g. galena (PbS). Gangue comprises the various waste minerals |
| | Journal (article/letter/editorial) |
| combining the commodity (lines) shown by numbers plus lower caps with the host rocks or structure (columns)...Ceriopyrochlore Cerite Cerussite Chabazite-(Ca) Chalcedony Chalcocite Chalcomenite Chalcophanite Chalcopyrite...Freibergite Fuchsite (chromium muscovite) Gahnite Galena Galkhaite Gallite Gallobeudantite Garnet (Ce,...Zr)(Si2O7)2OF3 Hg2I2 Ag2Hg3 Pb (Zn,Cu)(OH)(VO4) chrom chalcedony Na3Ti3.6 Nb0.4(Si2O7)2O4·4(H2O) KAl2(Si3Al)O10(OH...Pb) may be won at a profit from ore minerals, e.g. galena (PbS). Gangue comprises the various waste minerals |
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| its place of formation. A few minerals, such as chalcedony, have a special crystalline structure that does... Figure 2. Quartz from Schmirnerthal, Tirol, Austria. Quartz is often found as crystals. A crystal is...because they con- Figure 4. Chalcedony from the Faeroe Islands. Chalcedony is not crystalline in the normal...belong to this class. Diamond, halite, fluorite, galena, magnetite, and garnets are other wellknown examples...from St. Anthony Mine, Mammoth-Tiger 10x 18mm. District, Pinal County, Arizona, USA. Field of view: 33 |
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| districts.____-_--_-----_____-______---_ Bohemia district.._i_-_-__--_---_-_--_---___-______-_____---_--...areas and mining districts Continued. Bohemia district Continued. Mineral deposits._________________...areas and mining districts Continued. Bohemia district Continued. Mines and prospects Continued. Tall...___-_-___.-______-_-_____.__________._ Quartzville district..______-_----._______-_____-.-________-_-Location...and Betty or Smith and McLeary.__________________ Galena.--_-_.-_._________-_._....____________ Golden Fleece |
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| cave high, height hill lake lillle, small low, lower mine mountai n mountains range or chain open-pi1...cave high. height hill lake lillle. smal l low. lower mine mountain mountains range or chain open-pil...vysoky kopec, vrch jazero maly nizky baila vrch. horn vrchy. hory povrchova jama slil sachta lom rieka...noted in the Rodna Mt . (e.g. Blazna Valley). The Lower Cambrian ore belt. ho ted by the Tulghe~ Group....the re- gionally metamorpho ed formation of the Lower Palaeozoic. The essemially strati form ore bodies |
 | | Report (issue) |
| Paper 172 GOLD QUARTZ VEINS OF THE ALLEGHANY DISTRICT CALIFORNIA BY HENRY G. FERGUSON AND ROGER W...____________________ Conglomerate member. -_____--_--_ Lower slate and greenstone member _ Chert member. ___________________...--Relief quartzite. ______________________ Cape Horn slate__-_---_-_-.___------Serpentine ___________________________...Plagioclase ___________ Barite. ________-__--Chalcedony __________ Carbonate and sericite. Apatite. _..._______________ Rutile ____ _ ____ .._____.. Quartz, chalcedony, and opal Gold. ___________ _ ---____-_-__--_-_ |
 | | Report (volume) |
| the copper minerals.......................... Occurrence of the copper minerals.........................the silver minerals.......................... Occurrence of the silver minerals.........................compounds...................................... 135 Occurrence of the lead minerals...........................compounds...................................... 140 Occurrence of the zinc minerals...........................iron minerals............................. 143 Occurrence of the iron minerals........................ |
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| jezioro little, small malý kis. kicsi maty low, lower nízky alacsony niski mine dul bánya kopalnia...little, small mic malý malo. nebagato low. lower jos nízky zapadyna. nyzyna mine mină baňa...noted in the Rodna Mts. (e.g. Bla/na Valley). The Lower Cambrian ore belt, hosted by the Tulgheş Group,...the re gionally metamorphosed formations of the Lower Palaeozoic. The essentially stratiform ore bodies...Sebeş-Lotru Group), the only sig nificant type of occurrence is the graphite deposit at Polovragi in the Parâng |
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| ORE DEPOSITS OF THE BAYARD AREA, CENTRAL MINING DISTRICT, NEW MEXICO BY SAMUEL G. LASEY Prepared in cooperation...ORE DEPOSITS OF THE BAYARD AREA, CENTRAL MINING DISTRICT, NEW MEXICO By SAMUEL G. LASKY ABSTRACT This...in the southwestern part of the Central mining district, Grant County, N. Mex. Practically the entire...formation and crop out in the Bayard area, where the lower and middle of the three are the principal host rocks...wide. This zone 2 BAYAED AREA, CENTRAL MINING DISTRICT, NEW MEXICO is part of a northeastward-trending |
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| 718 GEOLOGY AND ORE DEPOSITS OF THE ' CREEDE DISTRICT, COLORADO BY WILLIAM H. EMMONS AND ESPER S....14 15 15 15 16 17 17 18 General character and occurrence.................................. 18 Petrography...................... 32 General character and occurrence.................................. 32 Contacts...................... 45 General character and occurrence.................................. 45 Thickness......................... General character and occurrence.................................... Thickness |
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| Calcite ___________________________________ _ Chalcedony _______________________________ _ Chalcopyrite..._ Epidote __________________________________ _ Galena ___________________________________ _ Gold ___...Sketch of part of the Dromedary vein showing chalcedony in quartz_______________________________________...the areal geology and studied the mines of the district in 1894, and the accompanying geologic map (pl...been found. The major geologic feature of the district is a body of early Cretaceous granodiorite 5 miles |
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| GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO BY W. S. BURBANK WITH A SECTION ON...Geography _ ______________ ___-__-__ Situation of the district _ _ _________________ Topographic features. ....Previous geologic and topographic work in the district. ____ ___________._-__-______--__. Field work...limestone-__-----------__General nature and thickness _ _ Lower limestone member. ______ Quartzite member_-____________...-----__.___.__ Petrography ___ __________________ Lower member._______________ Upper member________________ |
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| Director Bulletin 906-D GEOLOGY OF THE SEARCHLIGHT DISTRICT CLARK COUNTY, NEVADA BY EUGENE CALLAGHAN Contributions...___.-_-___-_______-_________. Outlook for the district...----____-__._-_-_-_-_______-_________. Mines...main part of the district._________ Mines and prospects in the eastern part of the district.__-_-.______...Geologic map of the main part of the Searchlight District, Clark County, Nev____._-_-_-_-._.___.-_-.__________...Nevada and Utah showing location of Searchlight district and areas covered by previous publications of |
 | | Report (issue) |
| INTRODUCTION. reports are those on the Mercur district, by J. E. Spurr and S. F. Emmons; the Bingham...Bingham The senior author, J3. S. Butler, began district, by J. M. Boutwell, Arthur Keith, and field work on...deposits of Utah in the S. F. Emmons; the Park City district, by J. M. FIELD .WORK AND AUTHORSHIP. summer...author, G. F. Loughlin, began work in the Tintic district in 1911 in collaboration with Waldemar Lindgren...the Tin tic and Thomas ranges, of the Leamington district, and of districts in theW asatch Range. Several |
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| emmo 0 Volume 28 N o . 5 January 2003 Chrome chalcedony Sky-blue glass / Brazilian imperial totiaz...However, the gemmological features, geological occurrence and inclusion characteristics of these samples...Gemm., 2003,28,5,257-264 A new chrome chalcedony occurrence from Western Australia Margot J. Willing...e-mail: nyanga@icenet.com.au ABSTRACT: Chrome chalcedony, an ornamental rock variety new to Australia...Australia, has been identified from an occurrence in the Newman area of Western Australia (WA). Formed by silicification |
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| .................................... Nicholia district.............................................................................. Spring Mountain district........................................................................................ Texas district.................................................districts of Lemhi County Continued. Page. Texas district Continued. Mines............................................................... 108 Blue Wing district.............:................................ |
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| andesite mineralization..--...---.--...-..--..... Occurrence of ores in the veins---.-......-.....----...... ILLUSTRATIONS. PLATE I. Geologic map of Tonopah mining district........................ FIG. 1. Plan of portion...sea level GEOLOGIC MAP 'OF TONOPAH MINING DISTRICT. NO. 219 White rhyolite Later dacite ( volcanic...at Tonopah. A satisfactory final report on the district calls for more detailed office study, microscopic...Besides the Mizpah the only mine in the Tonopah district proper \ which has actually made shipments of |
 | | Report (issue) |
| GEOLOGY AND ORE DEPOSITS OF TILE LEADVILLE MINING DISTRICT, COLORADO BY S. F. EMMONS, J. D. IRVING, AND...Petrography _ 25 Stratified rocks _ Sawatch quartzite ("Lower" quartzite) _ _ 25 25 Name _ erosion_ surface on_...fold-fault _ Faults in the eastern part of the district 95 62 Kokomo syncline_ Faults southeast_ of _..._ Leadville 62 the_ Fryer Hill folds _ 62 district _ 95 Warping and drag along normal faults, _ _ _ 96...Vivianite _ 171 Quartz _ Brown iron oxides _ 155 172 Chalcedony and opal _ 155 Jarosite and basic ferric sulphates_ |
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| yielding small cubes. Fracture: uneven, brittle. GALENA Color: Luster: lead gray. metallic. Hardness:...prismatic. Fracture: shell-like, uneven to poor. CHALCEDONY Luster: waxy. Hardness: 7. Cleavage: none. Fracture:...perfect cubic. shell-like, brittle. Fracture: CHALCEDONY Luster: waxy. Hardness: Cleavage: GYPSUM ... ZA aX Description of Minerals Actinolite Occurrence: Occurs generally in crystalline schists and...Remarks: A common rock-forming mineral. Albite Occurrence: Occurs in small crystals or, more often |
 | | Report (issue) |
| Professional Paper 177 THE GOLD HILL MINING DISTRICT U'TAH BY T. B. NOLAN UNItED STATES GOVERNMI£NT...Correiation of the Carboniferous formations __ Lower Triassic limestones___ _ __________ _ Unconformity...______ ___ ___ ___ _ __ ____ ___ ______ Clifton district _ _ __ History of mining and production__ ___...119 II Mines and prospects-Continued. Clifton district-Continued. Mines and prospects-Continued. Veins...Evans__________ _________________ Willow Springs district. ____ __ _ __ ___ _ ____ ___ History and production_________ |
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| .................. __ 55 Chemical character of lower part ........................................................ -·- .............. - ........ . 57 Lower magnesian limestone member........................__ .. _._ .. _._ ... ____ ..... ___ ..... _.. 71 Lower member ........................ _. _..... _. _....__ .. __ . ___ ._ ... _._. ___ ......... _.. 77 Lower Cretaceous series ........................... __..._.... - . - - - . - ... - - - - - - - . - .. 78 Lower limestone and calcareous shale ___ ._ ......... |
 | | Report (edition) |
| additional occurrences of emerald, opal, agate, chalcedony, organic gems, tiger eye jasper, aragonite, cordierite...6 Feldspar group 65 Feldspar properties and occurrence.............................................................................. 94 Geological occurrence................................................................................ 124 Opaline chalcedony............................................................ 124 Chapter 11 Chalcedony group 125 Chalcedony occurrence and properties............. |
 | | Report (issue) |
| .......................... . Situation of the district ...................................................................... General geology of the district .......................................................................................... . Occurrence and distribution ..............................40 41 41 4 CONTENTS. General goology of the district-Continued. Structure ........ ~ . . . . . . .... . . . . . . . . . . . . . . . . . . . . . . Chalcedony ........................... : . . . . . . . |
 | | Report (edition) |
| .............................. 96 Geological occurrence ............................................................................... 120 Opaline chalcedony ................................................................ 121 Chapter 14 Chalcedony group 123 Chalcedony ............................................................... 123 Formation of chalcedony................................................................................. 127 Chrome chalcedony ............................................ |
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| Malyukov and K. Vorobyev Oil and Gas Reservoirs in the Lower Triassic Deposits in the Arctic Regions of the Timan-Pechora...Though values for the favorable feed are marginally lower, nevertheless this difference is expressed in an... sphalerite, marcasite, chalcopyrite, bornite, galena, tennantite-tetrahedrite, gold, covellite, digenite...sphalerite, marcasite, chalcopyrite, bornite-idaite, galena, covellite, chalcocite, cubanite, cuprite including...grains, seen sometimes coeval with sphalerite and galena, are the third generation pyrites. The fourth generation |
