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Copper Ridge District

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Journal Article
Journal: GSA Bulletin
Published: 01 January 1982
GSA Bulletin (1982) 93 (1): 76–86.
...HABTE G. CHURNET; KULA C. MISRA; KENNETH R. WALKER Abstract The upper part of the Cambro-Ordovician Knox Group in the fault-bounded Copper Ridge zinc district, East Tennessee, consists of interbedded limestones and dolostones, with very minor sandy and cherty horizons. The nature of allochems...
Series: Society of Economic Geologists Guidebook Series
Published: 01 January 1992
DOI: 10.5382/GB.14.Ch3
EISBN: 9781934969670
... are also under way to resume production in the Idol mine of the Copper Ridge district, which has been inactive since 1981. ...
Journal Article
Journal: Economic Geology
Published: 01 August 1971
Economic Geology (1971) 66 (5): 805–810.
...; and Copper Ridge district, Tennessee. Representatives of deposits of this type hereinafter referred to as Tennessee sub-type extend the length of the Appalachian-Ouachita chain from New-foundland to Oklahoma. Except for the superimposed structural variations, these deposits are remarkably similar...
Journal Article
Journal: Economic Geology
Published: 01 August 1971
Economic Geology (1971) 66 (5): 792–798.
... Ordovician sediments.These findings are in general accord with those of recent workers in the Mascot-Jefferson City and Copper Ridge districts who have proposed that mineralization in these areas occurred during the time interval of pre-Middle Ordovician erosion. The long-held theory which associates...
Journal Article
Journal: Economic Geology
Published: 01 December 2011
Economic Geology (2011) 106 (8): 1335–1363.
...Patrick J. Waters; David R. Cooke; Rene I. Gonzales; David Phillips Abstract The Baguio district is located in the Central Cordillera of northern Luzon, Philippines. It contains numerous mineralized porphyry copper-gold, epithermal gold-silver and skarn gold-lead-zinc deposits. The district...
FIGURES | View All (10)
Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2012
DOI: 10.5382/SP.16.05
EISBN: 9781629490410
... Abstract The Río Blanco-Los Bronces copper-molybdenum porphyry district in the late Miocene to early Pliocene magmatic arc of central Chile is currently being mined by state mining company CODELCO (Río Blanco) and Anglo American Sur (Los Bronces). Combined annual production in 2011 was nearly...
FIGURES | View All (7)
Journal Article
Journal: Economic Geology
Published: 01 December 1985
Economic Geology (1985) 80 (8): 2136–2148.
...Bruce R. Doe; Maryse H. Delevaux; John P. Albers Abstract The tectonic setting comprising the West Shasta mining district has often been compared with that of primitive island arcs. Concentrations of uranium, thorium, and lead and lead isotope compositions were determined for Devonian ores...
Journal Article
Journal: GSA Bulletin
Published: 01 August 1988
GSA Bulletin (1988) 100 (8): 1300–1307.
...STEPHEN E. KESLER; LOIS M. JONES; JOAQUIN RUIZ Abstract Strontium isotopic ratios of wall-rock, ore, and gangue minerals from the Mascot-Jefferson City, Copper Ridge, and Sweetwater Mississippi Valley-type (MVT) districts and from the Lost Creek barite deposit in East Tennessee were measured...
Journal Article
Journal: SEG Discovery
Published: 01 April 2023
SEG Discovery (2023) (133): 19–27.
...Dave Shatwell Abstract Hierro Acarí and Cobrepampa are adjacent, Lower Cretaceous iron oxide-apatite (IOA) and iron oxide copper-gold (IOCG) districts, respectively, emplaced in the Coastal Cordillera of southern Peru, separated by a regional NW-trending fault. Mineralization in both districts...
FIGURES | View All (7)
Journal Article
Journal: Economic Geology
Published: 01 December 2011
Economic Geology (2011) 106 (8): 1317–1333.
... of the Scarborough Ridge ( Cooke et al., 2005 ). The district is one of the world’s premier mineral provinces, with >35 million ounces (Moz) of gold and 2.7 million metric tons (Mt) of copper ( Waters et al., 2011 ). Geology and porphyry mineralization of northern Luzon are reviewed in Chang et al. (2011...
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Series: Society of Economic Geologists Guidebook Series
Published: 01 January 2001
DOI: 10.5382/GB.35.15
EISBN: 9781934969885
... modern analogs include the actively forming massive sulfides of Guaymas Basin in the Gulf of California, Escanaba Trough on the Gorda Ridge, and Middle Valley on the Juan de Fuca Ridge. Introduction S tratabound massive sulfide deposits of the Vermont copper belt have supplied the largest metal...
FIGURES | View All (10)
Journal Article
Published: 01 May 2001
Canadian Journal of Earth Sciences (2001) 38 (4): 639–655.
...D.G. MacIntyre; M.E. Villeneuve Abstract New U/Pb and 40 Ar/ 39 Ar isotopic dating in the Babine porphyry copper district of central British Columbia documents three distinct magmatic events at 107–104, 85–78, and 54–50 Ma. The earliest event involved emplacement of rhyolite domes into submarine...
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Journal Article
Journal: Economic Geology
Published: 01 April 1994
Economic Geology (1994) 89 (2): 307–321.
... that from Copper Ridge plots in both clusters. Fluorite from Sweetwater falls on a long array in 207 Pb/ 204 Pb- 206 Pb/ 204 Pb space that has a two-stage age of 1.55 to 1.9 Ga for t 2 = 360 Ma, the previously published 87 Sr/ 86 Sr isochron age obtained for the Mascot-Jefferson City district. Barite...
Journal Article
Journal: Economic Geology
Published: 01 November 1951
Economic Geology (1951) 46 (7): 731–756.
... body is a lenticular mass in the Abrigo formation about 400 feet below the present surface. Faulted and fractured limestone and dolomite beds of the Escabrosa limestone (Mississippian) crop out above the ore body. Local copper stains, which are abundant in the district, and a greater-than-average...
Series: Society of Economic Geologists Guidebook Series
Published: 01 January 1993
EISBN: 9781934969700
... Abstract Massive sulfide deposits of the Vermont copper belt yielded -4 Mt of ore during intermittent production from 1793 to 1958. The deposits consist of stratabound and generally stratiform pyrrhotite, chalcopyrite, and minor sphalerite and pyrite within metasedimentary and minor mafic...
Image
Jarositic (after pyritic) rocks on Von Kiesling ridge (~4,500 m) above the high grade magmatic-hydrothermal breccias of Los Sulfatos porphyry copper-molybdenum deposit, Río Blanco-Los Bronces district, central Chile. Photograph by Juan Carlos Toro.
Published: 01 April 2024
Figure 4.27 Jarositic (after pyritic) rocks on Von Kiesling ridge (~4,500 m) above the high grade magmatic-hydrothermal breccias of Los Sulfatos porphyry copper-molybdenum deposit, Río Blanco-Los Bronces district, central Chile. Photograph by Juan Carlos Toro.
Journal Article
Journal: Economic Geology
Published: 01 May 1994
Economic Geology (1994) 89 (3): 493–514.
... temperatures in main-stage ore minerals with color alteration index-determined host-rock temperatures reveals that a majority of Mississippi Valley-type districts (Pine Point, Newfoundland Zinc, Mascot-Jefferson City, Copper Ridge, Sweetwater, Central Missouri, Northern Arkansas, and Tri-State...
Journal Article
Journal: Economic Geology
Published: 01 September 2013
Economic Geology (2013) 108 (6): 1397–1424.
... of Eocene age produced by NE-striking normal faults that are limited to the northwest part of the district and synchronous with the eruption of the Lowland Creek Volcanics; and Miocene to present gentle (15°) ESE tilting in the hanging walls of the Continental, East Ridge, and Rocker normal faults...
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Journal Article
Journal: Economic Geology
Published: 01 December 1985
Economic Geology (1985) 80 (8): 2240–2254.
...Paul A. Lindberg Abstract The Devonian massive sulfide ore deposits of the West Shasta district, California, have produced copper, zinc, gold, silver, and sulfur since 1897. An island-are setting is suggested for the volcanic host-rock sequence beginning with submarine lavas of the Copley...
Journal Article
Journal: Economic Geology
Published: 01 July 1979
Economic Geology (1979) 74 (4): 908–918.
..., cathodoluminescent zonations. The cathodoluminescent microstratigraphy reveals that both the sphalerite and gangue dolomite were time correlative through the Mascot-Jefferson City and possibly the Copper Ridge districts.Preliminary studies suggest that Cathodoluminescent petrography has possible exploration...