CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


 
Database name: World Mississippi Valley-type deposits
Custodial agency: Geological Survey of Canada
Compilers: D. F. Sangster
Release date: 2015-02-06
   
Deposit name(s): Mascot-Jefferson City District
Longitude / Latitude: -83.62500 / 36.12500
Political location(s): United States; Province or state: Tennessee
Deposit clan (type): Mississippi Valley-type
Deposit status: producer
Geologic province: Appalachian Basin
Geologic subprovince: Valley-and-Ridge Province
Geologic district: East Tennessee District
Deposit object located: centroid of district
Commodities: Zn
Mineralization styles: discordant collapse breccia cement; concordant collapse breccia cement
Geological ages: Early Ordovician (host rocks)
Mississippian (mineralization)
Tectonic setting: continental platform (host rocks)
Host rocks: (1) sedimentary; carbonate; Depositional setting: Shallow-water carbonates
Individual lithologies:dolostone
Host rock stratigraphy:Knox group
Mineralogy: dolomite, pyrite, marcasite, fluorite, calcite, quartz
(mineralization): sphalerite
Radiometric ages: Object dated: ore; Age - Ma: 286; +20; -20; Dating method: Paleomagnetism; Concentrate: Whole ore; Source rock: ore; Event dated: mineralization; Reference: Bachtadse, V.; Van der Voo, R.; Haynes, F. M.; Kesler, S. E., 1987: Late Paleozoic Magnetization of Mineralized and Unmineralized Ordovician Carbonates from East Tennessee: Evidence for a Post-Ore Chemical Event; Journal of Geophysical Research, Volume 92, p. 14165 - 14176

Object dated: mineralogy(2); Age - Ma: 347; +20; -20; Dating method: Rb-Sr; Concentrate: sphalerite; Source rock: ore; Event dated: mineralization; Reference: Nakai, S.; Halliday, A. N. ; Kesler, S. E. ; Jones, H. D.; Kyle, J. R.; Lane, T. E., 1993: Rb-Sr Dating of Sphalerites from Mississippi Valley-Type (MVT) Ore Deposits; Geochimica et Cosmochimica Acta, Volume 57, p. 417 - 427

Object dated: mineralogy(2); Age - Ma: 377; +20; -20; Dating method: Rb-Sr; Concentrate: sphalerite; Source rock: ore; Event dated: mineralization; Reference: Nakai, S.; Halliday, A. N. ; Kesler, S. E. ; Jones, H. D.; Kyle, J. R.; Lane, T. E., 1993: Rb-Sr Dating of Sphalerites from Mississippi Valley-Type (MVT) Ore Deposits; Geochimica et Cosmochimica Acta, Volume 57, p. 417 - 427
References:
Briskey, J. A.; Dingess, P. R.; Smith, F.; Gilbert, R. C.; Armstrong, A. K.; Cole, G. P., 1986
Localization and Source of Mississippi Valley-type Zinc Deposits in Tennessee, USA, and Comparisons with Lower Carboniferous Rocks of Ireland
in Geology and Genesis of Mineral Deposits in Ireland, Edited by Andrew, C. J.; Crowe, R. W. A.; Finlay, S.; Pennell, W. M.; Pyne, J. F., Irish Association for Economic Geology, Cahill Printers, Ireland, 711 p, p. 635 - 661

Misra, K. C.; Fulweiler, R. E., 1995
Zinc Deposits of the Mascot-Jefferson City District, East Tennessee
IV, Section Fluorite and Zinc Deposits, Illinois and Tennessee, in Carbonate-Hosted Lead-Zinc-Fluorite-Barite Deposits of North America, Society of Economic Geologists 75th Anniversary Guidebook, June 3-6, 1995, Edited by Misra, K. C., Guidebook Volume, Society of Economic Geologists, Cirizen Printing Co., Inc., 1309 Webster Avenue, Fort Collins, Colorado 80521, 22, 254 p, p. 206 - 221

Production data: Report period: from 1912 until 1986; 250 million metric tons ore; Provisional entry?: yes; Yearly or summary?: S
Grade-commodity information:Zn: 3 percent
Reference: Briskey, J. A.; Dingess, P. R.; Smith, F.; Gilbert, R. C.; Armstrong, A. K.; Cole, G. P., 1986: Localization and Source of Mississippi Valley-type Zinc Deposits in Tennessee, USA, and Comparisons with Lower Carboniferous Rocks of Ireland; in Geology and Genesis of Mineral Deposits in Ireland, Edited by Andrew, C. J.; Crowe, R. W. A.; Finlay, S.; Pennell, W. M.; Pyne, J. F., Irish Association for Economic Geology, Cahill Printers, Ireland, 711 p, p. 635 - 661
Percent weights allocated to deposit: 100.0%
Resource data:
Disclaimer - Reserves/Resource Data

Her Majesty the Queen in Right of Canada, represented by the Minister of Natural Resources (NRCan) does not warrant or guarantee the accuracy, completeness or fitness for any purpose of Reserve and Resource information (Data) contained in this database, including whether the Data is compliant with any securities regulations or standards, and NRCan does not assume any liability with respect to any damage or loss incurred as a result of the use made of the Data.

Resource and reserve figures are historical in nature. The Data source provided with each set of figures should be cited if the Data are re-reported.

Estimate date: 1986; 250 million metric tons ore; Combined with production?: no; Provisional entry?: no; Resource category: estimated
Grade-commodity information:Zn: 3 percent
Reference: Briskey, J. A.; Dingess, P. R.; Smith, F.; Gilbert, R. C.; Armstrong, A. K.; Cole, G. P., 1986: Localization and Source of Mississippi Valley-type Zinc Deposits in Tennessee, USA, and Comparisons with Lower Carboniferous Rocks of Ireland; in Geology and Genesis of Mineral Deposits in Ireland, Edited by Andrew, C. J.; Crowe, R. W. A.; Finlay, S.; Pennell, W. M.; Pyne, J. F., Irish Association for Economic Geology, Cahill Printers, Ireland, 711 p, p. 635 - 661
Percent weights allocated to deposit: 100.0%

Generated 2015-02-06 15:21:04 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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