Colorado · Chaffee County
Past Producer

Sedalia Mine

Chaffee County, Colorado, United States
ZincCopperGoldSilverLead
⌖ Show on mapUSGS source ↗
Commodities
PrimaryZinc, Copper
SecondaryGold, Silver, Lead
Commodity typeM
Deposit
Model271: Stratabound Precambrian sulfide, Colorado and Wyoming
Deposit sizeS
WorkingsSurface/Underground
Orebody formLENS
Ore controlNe-Trending Faults, Metasomatized Rocks Intersecting Third E-W Fault; Contact Between Biotite Schist And Garnet Gneiss; Shattered Zone Where "Glory Hole" Occurs
Materials
Ore mineralsAnglesite, Aurichalcite, Chalcanthite, Chalcocite, Chalcopyrite, Chrysocolla, Covellite, Cuprite, Gahnite, Galena, Gold, Hydrozincite, Malachite, Silver, Smithsonite, Sphalerite, Tenorite, Willemite
GangueActinolite, Andalusite, Anthophyllite, Apatite, Asbestos, Barite, Beryl, Biotite, Bytownite, Calcite, Chlorite, Clinozoisite, Cordierite, Corundum, Cummingtonite, Diopside, Epidote, Gypsum, Hematite, Hemimorphite, Hornblende, Idocrase, Kyanite, Labradorite, Limonite, Magnetite, Marcasite, Melanterite, Microcline, Muscovite, Opal, Phlogopite, Psilomelane, Pyrite, Pyrrhotite, Quartz, Rutile, Serpentine, Sillimanite, Sphene, Staurolite, Talc, Tourmaline, Tremolite, Zircon
Geology
Host rockGabbro,Mica Schist,Gneiss,Amphibolite,Pegmatite · Banded Gneiss; Interlayered Felsic And Hornblendic Gneisses
Associated rockQuartz Monzonite
StructureSouthern Mosquito Range, Arkansas Valley Graben, 2 Major Faults: N-Trending, Ne-Trending; On Se Limb Of Faulted Anticline On West Side Of Pleasant Valley Syncline; Upper Arkansas Valley Graben
Tectonic settingCentral Cordillera (Southern Rocky Mountains)
AlterationOxidation; Gassan Cap (100 Ft Thick); Retrograde Metamorphism-Sillimanite Facies
Economic & production
Development statusPast Producer
First production1883
Last production1923
Discovery year1878
Identification
Deposit ID10013834
MRDS IDD010356
Alternate namesSedalia Copper Mine, Dewey Adit, Jackpot Adit, Adits Nos. 1-3
RegionNA
Data scoreA
Coordinates38.59, -106.01977
References
SHERIDAN, D.M., RAYMOND, W.H., 1978, STRATABOUND PRECAMBRIAN ZINC-COPPER DEPOSIT AT THE SEDALIA MINE, CHAFFEE COUNTY, COLORADO: COLORADO SCHOOL OF MINES PROFESSIONAL CONTRIBUTIONS NO. 9, P. 146-150.HEINRICH, E.W., 1981, PRECAMBRIAN TUNGSTEN AND COPPER-ZINC SKARN DEPOSITS OF SOUTH-CENTRAL COLORADO: CGS RESOURCE SERIES 21, P. 93-99HEYL, A.V., 1964, OXIDIZED ZINC DEPOSITS OF THE UNITED STATES, PART 3. COLORADO: USGS BULLETIN 1135-C, P. C83.LINDGREN, WALDEMAR, 1908, NOTES ON COPPER DEPOSITS IN CHAFFEE, FREMONT, AND JEFFERSON COUNTIES, COLORADO: USGS BULLETIN 340, P. 157-174. & &BOARDMAN, S.J., 1976, GEOLOGY OF THE PRECAMBRIAN METAMORPHIC ROCKS OF THE SALIDA AREA, CHAFFEE COUNTY, COLORADO: THE MOUNTAIN GEOLOGIST, V. 13, NO. 3, P. 89-100. & &BOARDMAN, S.J., 1971, PRECAMBRIAN GEOLOGY AND MINERAL DEPOSITS OF THE SALIDA AREA, CHAFFEE COUNTY, COLORDADO: PH.D. THESIS, UNIVERSITY OF MICHIGAN, 131 P. &&VAN ALSTINE, R.E., 1974, GEOLOGY AND MINERAL DEPOSITS OF THE PONCHA SPRINGS SE QUADRANGLE, CHAFFEE COUNTY, COLORADO: USGS PROFESSIONAL PAPER 829, 19 P., MAPS. &&VANDERWILT, J.W., 1947, MINERAL RESOURCES OF COLORADO: COLORADO MINERAL RESOURCES BOARD, P. 48-49 &&TWETO, O.L., STEVEN, T.A., HAIL, W.J., JR., MOENCH, R.H., 1976, PRELIMINARY GEOLOGIC MAP OF THE MONTROSE 1 DEG X 2 DEG QUADRANGLE, SOUTHWESTERN COLORADO: USGS MAP MF-761, 1:250,000 &&PEARL, R.M., 1958, COLORADO GEM TRAILS AND MINERAL GUIDE: SAGE BOOKS, P. 82-86?F11) BHUTTA, M.A., 1954, GEOLOGY OF THE SALIDA AREA, CHAFF EE AND FREMONT COUNTIES, COLORADO: COLORADO SCHOOL OF MINES PHD THESIS, 173 P.Sheridan, D.M., and Raymond, W.H., 1984. Preliminary report on the geology of the Sedalia mine are and its Proterozoic deposits of base-metal sulfides and gahnite, Chaffee County, Colorado: U.S. Geological Survey Open-File Report 84-0800, 27 p., 1 plate.Sheridan, D.M., Raymond, W.H., Taylor, R.B., and Hasler, J.W., 1990, Metallogenic map of stratabound exhalative and related occurrences in Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1971, scale 1:1,000,000HEINRICH, E.W., 1981, Precambrian tungsten and copper-zinc skarn deposits in Colorado: Colorado Geological Survey Resource Series 21, 115p.