Telluride ores of Boulder County, Colorado:
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Boulder, Colo.
1969
|
| Series: | Geological Society of America: Memoir
109 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | XVII, 237 S. Ill., graph. Darst., Kt. |
| ISBN: | 0813711096 |
Staff View
MARC
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| 100 | 1 | |a Kelly, William C. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Telluride ores of Boulder County, Colorado |c William C. Kelly ; Edwin N. Goddard |
| 264 | 1 | |a Boulder, Colo. |c 1969 | |
| 300 | |a XVII, 237 S. |b Ill., graph. Darst., Kt. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Geological Society of America: Memoir |v 109 | |
| 650 | 7 | |a Mineralogia - Colorado |2 larpcal | |
| 650 | 7 | |a Recursos minerais - Colorado |2 larpcal | |
| 650 | 4 | |a Mineralogy |z Colorado |z Boulder County | |
| 650 | 4 | |a Ore deposits |z Colorado |z Boulder County | |
| 650 | 4 | |a Tellurium ores |z Colorado |z Boulder County | |
| 700 | 1 | |a Goddard, Edwin N. |e Verfasser |4 aut | |
| 830 | 0 | |a Geological Society of America: Memoir |v 109 |w (DE-604)BV035915045 |9 109 | |
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Record in the Search Index
| _version_ | 1804128065131905024 |
|---|---|
| adam_text | Titel: Telluride ores of Boulder County, Colorado
Autor: Kelly, William C
Jahr: 1969
Contents
Abstract______________________________________________________________________________________________________________________________________________________________1
Introduction ________________________________________________________________________________________________________________________________________________________5
History and Production____________________________________________________________________________________________________________________________________________7
Geologic Setting ______________________________________________________________________________________________________________________________________________________________________________9
General features ____________________________________________________________________________________________________________________________________________________________________________9
Precambrian rocks ________________________________________________________________________________________________________________________________________________________________11
Late Cretaceous-Early Tertiary igneous rocks __________________________________________________________________________________________12
General relations ____________________________________________________________________________________________________________________________________________________12
Rock types____________________________________________________________________________________________________________________________________________________________13
Structure __________________________________________________________________________________________________________________________________________________________________________________________15
Precambrian shear zones____________________________________________________________________________________________________________________15
Breccia reef faults ______________________________________________________________________________________________________________________15
Vein fissures______________________________________________________________________________________________________________16
Ore Deposits ________________________________________________________________________________________________________________________________________________________________________________17
General remarks ____________________________________________________________________________________________________________________________________________17
Lead-silver deposits ______________________________________________________________________________________________________________________________________________17
Fluorspar deposits __________________________________________________________________________________________________________________________18
Pyritic gold deposits __________________________________________________________________________________________________________________________19
Gold telluride deposits ____________________________________________________________________________________________________________________________20
Tungsten deposits _________________________________________________________________________________21
Age relations of ore types________________________________________________________________________________________________________________________________________23
Wall Rock Alteration Along the Telluride Veins______________________________________________________________________25
Structural Control of the Telluride Ores_____________________________________________________________________________29
Regional controls ______________________________________________________________________________________________________________________________________________________________________29
Local control within vein fissures_________________________________________________33
Identification of the Tellurides____________________________________________________________________________________________________________________________35
General remarks __________________________________________________________________________________________________________________________________________________________________35
X-ray methods__________________________________________________________________________________________________________________35
Electron micro-probe analyses ________________________________________________________________________________________________________________35
Optical rotation properties____________________________________________________________________________________________________________________________________36
Polarization figures______________________________________________________________________________________________________________________________________________37
Reflectivities____________________________________________________________________________________________________________________________________________________________________37
Indentation microhardnesses ____________________________________________________________________________________________________________41
Microchemical tests ____________________________________________________________________________________________________________________________________________43
Diagnostic properties of common tellurium minerals----------------------------------------------------------45
General remarks____________________________________________________________________________45
Altaite ______________________________________________________________________________________________________________45
Calaverite-krennerite-sylvanite ------------------------------46
Coloradoite ----------------------------------------------47
Empressite____________________________________________________________________________________________________47
Hessite------------------------------------------------47
Melonite___________________
Nagy agite-------------------
Petzite __________________
Stuetzite ___________________
Tellurium _________________
Tetradymite ______________
Descriptive Mineralogy _________
General remarks_______________
Native elements _______________
Gold ___________________
Tellurium_____
Mercury and amalgam
Silver __________________________
Sulfides_____________________________
Chalcopyrite ___________
Galena ______________________
Marcasite __________________
Pyrite _________________________
Sphalerite __________________
Other Sulfides ___________
Tellurides _________________________
Altaite ________________________
Calaverite__________________
Coloradoite ______________
Empressite ________________
Hessite ____________________
Krennerite ________________
Melonite _______________
Nagy agite _________________
Petzite __________________
Rickardite ------------------
Stuetzite ------------------
Sylvanite _______________
Tetradymite _____________
Sulfosalts __________________________
Aikinite ______________________
Jamesonite ___________________
Kobellite ______________________
Pyrargyrite_______________
Tetrahedrite _______________
Other sulfosalts ___________
Halides _________________________
Calomel ----------------------
Fluorite _____________________
Silver halides______________
Carbonates________________________
Ankerite-dolomite _______
Calcite _____________________
Siderite _______________________
Rhodochrosite ________
Sulfates ________________________
Barite __________________
Gypsum __________________
Jarosite__________________________
49
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Tellurites and tellurates _____________________________________________________________________________ 99
Phosphate _______________________________________________________________________________________ 99
Tungstates ______________________________________________________________________________________________ 100
Ferberite _____________________________________________________________________________________________ 100
Scheelite___________________________________________________________________________________________ 101
Silicates ------------------------------------------------------------------------------------------------------ 101
Adularia________________________________________________________________________________________________ 101
Chalcedony ____________________________________________________________________________________________ 102
Opal ___________________________________________________________________________________________________________ 102
Quartz ________________________________________________________________________________________________________ 102
Roscoelite ____________________________________________________________________________________________ 103
Oxides ___________________________________________________________________________________________________________ 105
Goethite _________________________________________________________________________________________________ 105
Hematite __________________________________________________________________________________________ 106
Paratellurite ____________________________________________________________________________________ 106
Tellurite __________________________________________________________________________________ 107
Other oxides _________________________________________________________________________________ 107
Unidentified Minerals----------------------------------------------------------------- 107
Mineral A _____________________________________________________________________________ 107
Mineral B __________________________________________________________________________ 109
Weissite(?) _____________________________________________________________________________ 109
Summary of Hypogene Associations ______________________________________________ 111
General remarks ____________________________________________________________________________ 111
Pairs in contact _________________________________________________________________________ 111
Frequencies of associations_________________________________________111
Preferential associations and antipathies-------------------------------------- 113
The Assay Record __________________________________________________________________________ 117
Distribution of Minerals_______________________________________________________________ 123
Local distribution ________________________________________________________________________________ 123
Regional distribution __________________________________________________________________________ 123
Pasagenesis _____________________________________________________________________________________________________ 127
The general vein sequence ------------------------------------------------------------------------- 127
The metallic sequence _____________________________________________________________________________ 129
Phase Relations of the System Au-Ag-Te --------------------------------------------------- 133
Experimental phase relations --------------------------------------------------------------------------- 133
Application of experimental relations to the Boulder County deposits-------------- 135
General remarks ------------------------------------------------------------------------------------------ 135
Cooling versus initial deposition ------------------------------------------------------------------ 136
Observed associations -------------------------------------------------------------------------------- 136
Interpretations of the Boulder County ores------------------------------------------------- 138
Lack of melting phenomena --------------------------------------------------------------------- 138
Associations of tellurium ---------------------------------------------------------------------- 139
Relations along the join AuTe2-AuAgTe4 -------------------------------------- 139
Hessite twinning ----------------------------------------------------------------------------- 141
Origin of petzite-hessite intergrowths -------------------------------------- 141
Origin of hessite-sylvanite intergrowths ------------------------------------------ 142
Origin of certain late tellurides and native gold-------------------------- 143
Degree of equilibrium------------------------------------------------------------------------ 146
Initial deposition--------------------------------------------------------------- 146
Cooling stages------------------------------------------------------------------------ 147
Supergene Alteration_________________________________________________________________________149
Extent ________________________________________________________________________________;----------149
Summary of alteration products----------------------------------------------------------- 150
General remarks-------------------------------------------------------------------------- 150
Native gold __________________________________________________________________________________________________________________________________________________________________150
Silver minerals ________________________________________________________________________________________________________________________________________________________150
Tellurium oxides __________________________________________________________________________________________________________________________________________________________________151
Supergene native tellurium ______________________________________________________________________________________________________________________________151
Tellurites and tellurates__________________________________________________________________________________________________________________________________________________151
Mercury minerals ________________________________________________________________________________________________________________________________________________________152
Copper minerals ________________________________________________________________________________________________________________________________________________________________________________152
Iron minerals ______________________________________________________________________________________________________________________________________________________________152
Supergene gangue minerals____________________________________________________________________________________________________________________________________152
Supergene geochemistry ____________________________________________________________________________________________________________________________________________153
General remarks _____________________________________________________________________________________________________________________________________________________________153
Behavior of tellurium________________________________________________________________________________________________________________________________________153
Behavior of gold________________________________________________________________________________________________________________________________________________156
Behavior of silver __________________________________________________________________________________________________________________________________________________158
Jarosite-goethite relations ______________________________________________________________________________________________________________________________160
The Ore-Forming Environment ____________________________________________________________________________________________________________________________________165
Depths and pressures of ore deposition______________________________________________________________________________________________165
Temperatures of ore deposition______________________________________________________________________________________________________________________________________168
Qualitative indications ____________________________________________________________________________________________________________________________________________168
Au-Ag-Te phase relations ________________________________________________________________________________________________________________________________________________168
Arsenopyrite ________________________________________________________________________________________________________________________________169
Bravoite ------------------------------------------------------------------------------------------------------------------------------------------------------------------169
Goethite-hematite relations ____________________________________________________________________________________________________________170
Wall rock alteration assemblages____________________________________________________________________________________________________________________170
Fluid inclusion thermometry________________________________________________________________________________________________________________173
Summary ____________________________________________________________________________________________________________________________________176
Sources of the metals and other vein components________________________________________________________________________177
Unsolved problems__________________________________________________________________________________________________________________________________179
Classification __________________________________________________________________________________________________________________________________________________183
Mineralogical bases for classification of telluride deposits____________________________________________________183
The Boulder County deposits________________________________________________________________________________________________186
Conclusions _______________________________________________________________________________________________________________________________________________________________189
References Cited____________________________________________________________________________________________________________________________________191
Index ______________________________________________________________________________________________________________________________________________________________________________________________227
|
| any_adam_object | 1 |
| author | Kelly, William C. Goddard, Edwin N. |
| author_facet | Kelly, William C. Goddard, Edwin N. |
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| author_sort | Kelly, William C. |
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| dewey-sort | 3553 3499 |
| dewey-tens | 550 - Earth sciences |
| discipline | Geologie / Paläontologie |
| format | Book |
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| id | DE-604.BV013297318 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T18:43:19Z |
| institution | BVB |
| isbn | 0813711096 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-009065123 |
| oclc_num | 10921 |
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| owner | DE-19 DE-BY-UBM DE-188 |
| owner_facet | DE-19 DE-BY-UBM DE-188 |
| physical | XVII, 237 S. Ill., graph. Darst., Kt. |
| publishDate | 1969 |
| publishDateSearch | 1969 |
| publishDateSort | 1969 |
| record_format | marc |
| series | Geological Society of America: Memoir |
| series2 | Geological Society of America: Memoir |
| spelling | Kelly, William C. Verfasser aut Telluride ores of Boulder County, Colorado William C. Kelly ; Edwin N. Goddard Boulder, Colo. 1969 XVII, 237 S. Ill., graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Geological Society of America: Memoir 109 Mineralogia - Colorado larpcal Recursos minerais - Colorado larpcal Mineralogy Colorado Boulder County Ore deposits Colorado Boulder County Tellurium ores Colorado Boulder County Goddard, Edwin N. Verfasser aut Geological Society of America: Memoir 109 (DE-604)BV035915045 109 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009065123&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Kelly, William C. Goddard, Edwin N. Telluride ores of Boulder County, Colorado Geological Society of America: Memoir Mineralogia - Colorado larpcal Recursos minerais - Colorado larpcal Mineralogy Colorado Boulder County Ore deposits Colorado Boulder County Tellurium ores Colorado Boulder County |
| title | Telluride ores of Boulder County, Colorado |
| title_auth | Telluride ores of Boulder County, Colorado |
| title_exact_search | Telluride ores of Boulder County, Colorado |
| title_full | Telluride ores of Boulder County, Colorado William C. Kelly ; Edwin N. Goddard |
| title_fullStr | Telluride ores of Boulder County, Colorado William C. Kelly ; Edwin N. Goddard |
| title_full_unstemmed | Telluride ores of Boulder County, Colorado William C. Kelly ; Edwin N. Goddard |
| title_short | Telluride ores of Boulder County, Colorado |
| title_sort | telluride ores of boulder county colorado |
| topic | Mineralogia - Colorado larpcal Recursos minerais - Colorado larpcal Mineralogy Colorado Boulder County Ore deposits Colorado Boulder County Tellurium ores Colorado Boulder County |
| topic_facet | Mineralogia - Colorado Recursos minerais - Colorado Mineralogy Colorado Boulder County Ore deposits Colorado Boulder County Tellurium ores Colorado Boulder County |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009065123&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV035915045 |
| work_keys_str_mv | AT kellywilliamc tellurideoresofbouldercountycolorado AT goddardedwinn tellurideoresofbouldercountycolorado |