Log In
Detroit City Mine, Detroit City Claim Block, Mount Bross, Alma Mining District, Park County, Colorado, USAi
| Regional Level Types | |
|---|---|
| Detroit City Mine | Mine (Inactive) |
| Detroit City Claim Block | Group of Claims |
| Mount Bross | Mountain |
| Alma Mining District | Mining District |
| Park County | County |
| Colorado | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
39° 18' 45'' North , 106° 6' 59'' West
Latitude & Longitude (decimal):
Type:
Mine (Inactive) - last checked 2024
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Alma | 277 (2017) | 5.6km |
| Fairplay | 681 (2017) | 13.9km |
| Blue River | 904 (2017) | 14.4km |
| Leadville | 2,644 (2017) | 16.6km |
| Leadville North | 1,794 (2011) | 17.0km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Colorado Gold Camp | Frisco, Colorado | 29km |
Other/historical names associated with this locality:
Detroit City Portal
The Detroit City mine was started in 2016 and is a new mine approximately 60 meters vertically above the former Sweet Home mine adit (now permanently closed/sealed off). The mining target is the upward extension of the mineralized Sweet Home vein system, and the goal is to mine specimen-quality rhodochrosite and associated minerals. The Detroit City mine is operated by Collector's Edge Minerals Incorporated and is an active mining operation. Please see the frequently asked questions below for additional information.
Question: Is this going to be a re-opening of the Sweet Home mine?
Answer: No. The Detroit City mine is a completely different mine, put in ‘from scratch’, and will not intersect or connect to any of the former Sweet Home mine workings. There are multiple reasons for this decision not to pursue mining rhodochrosite via the old Sweet Home workings.
Question: Are visitors welcome at the Detroit City mine?
Answer: The mine is strictly off-limits to unauthorized visitors. At the present time, the mine is simply a tunnel into a mountain through unmineralized rock, so there really isn’t too much to see anyway. We will be posting frequent updates on the progress of the mine online (collectorsedge.com, Facebook, Instagram, and email updates), so stay tuned.
Question: Will Rhodochrosite and other minerals from the Detroit City mine look the same as those from the Sweet Home mine?
Answer: While every pocket encountered at the Sweet Home mine was different and unique, we have strong reason to believe that the quality, color and size of rhodochrosite crystals found in the Detroit City mine will be similar to those found at the Sweet Home. That said, there is always the possibility that new types of crystallized rhodochrosite or other minerals will be found, and we are excited for that possibility. We would refer the reader to the special July-August 1998 issue of the Mineralogical Record magazine on the Sweet Home Mine to learn more about the mineralogy of this unique deposit.
Specimen production from the Detroit City mine began in 2018, with more rhodochrosite, fluorite, calcite, tetrahedrite, and quartz coming to light (Moore, 2020).
Collectors Edge announced the permanent closure of the Detroit City Portal on 3 September 2024.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
19 valid minerals.
Detailed Mineral List:
| ⓘ Ankerite Formula: Ca(Fe2+,Mg)(CO3)2 References: |
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) References: |
| ⓘ Bornite Formula: Cu5FeS4 References: |
| ⓘ Calcite Formula: CaCO3 References: |
| ⓘ Chalcopyrite Formula: CuFeS2 References: |
| ⓘ 'Chlorite Group' References: |
| ⓘ Dickite Formula: Al2(Si2O5)(OH)4 References: |
| ⓘ Dolomite Formula: CaMg(CO3)2 References: |
| ⓘ Fluorapatite Formula: Ca5(PO4)3F References: |
| ⓘ Fluorite Formula: CaF2 References: |
| ⓘ Galena Formula: PbS References: |
| ⓘ Goyazite Formula: SrAl3(PO4)(PO3OH)(OH)6 References: |
| ⓘ Hematite Formula: Fe2O3 References: |
| ⓘ Hübnerite Formula: MnWO4 References: |
| ⓘ 'K Feldspar' References: |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 References: |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 References: |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 References: |
| ⓘ Pyrite Formula: FeS2 References: |
| ⓘ Quartz Formula: SiO2 References: |
| ⓘ Rhodochrosite Formula: MnCO3 References: |
| ⓘ Sphalerite Formula: ZnS References: |
| ⓘ Svanbergite Formula: SrAl3(PO4)(SO4)(OH)6 References: |
| ⓘ 'Tennantite Subgroup' Formula: Cu6(Cu4C2+2)As4S12S References: |
| ⓘ 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | 'Tennantite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)As4S12S |
| ⓘ | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Hübnerite | 4.DB.30 | MnWO4 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Rhodochrosite | 5.AB.05 | MnCO3 |
| ⓘ | Ankerite | 5.AB.10 | Ca(Fe2+,Mg)(CO3)2 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Svanbergite | 8.BL.05 | SrAl3(PO4)(SO4)(OH)6 |
| ⓘ | Goyazite | 8.BL.10 | SrAl3(PO4)(PO3OH)(OH)6 |
| ⓘ | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | Dickite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ | 'K Feldspar' | - | |
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| H | ⓘ Goyazite | SrAl3(PO4)(PO3OH)(OH)6 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Svanbergite | SrAl3(PO4)(SO4)(OH)6 |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| C | Carbon | |
| C | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | ⓘ Rhodochrosite | MnCO3 |
| O | Oxygen | |
| O | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Fluorapatite | Ca5(PO4)3F |
| O | ⓘ Goyazite | SrAl3(PO4)(PO3OH)(OH)6 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Hübnerite | MnWO4 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rhodochrosite | MnCO3 |
| O | ⓘ Svanbergite | SrAl3(PO4)(SO4)(OH)6 |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| F | Fluorine | |
| F | ⓘ Fluorapatite | Ca5(PO4)3F |
| F | ⓘ Fluorite | CaF2 |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Na | Sodium | |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Al | Aluminium | |
| Al | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| Al | ⓘ Goyazite | SrAl3(PO4)(PO3OH)(OH)6 |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Svanbergite | SrAl3(PO4)(SO4)(OH)6 |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| P | Phosphorus | |
| P | ⓘ Fluorapatite | Ca5(PO4)3F |
| P | ⓘ Goyazite | SrAl3(PO4)(PO3OH)(OH)6 |
| P | ⓘ Svanbergite | SrAl3(PO4)(SO4)(OH)6 |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| S | Sulfur | |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| S | ⓘ Svanbergite | SrAl3(PO4)(SO4)(OH)6 |
| S | ⓘ Tennantite Subgroup | Cu6(Cu4C22+)As4S12S |
| S | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Fluorapatite | Ca5(PO4)3F |
| Ca | ⓘ Fluorite | CaF2 |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Mn | Manganese | |
| Mn | ⓘ Hübnerite | MnWO4 |
| Mn | ⓘ Rhodochrosite | MnCO3 |
| Fe | Iron | |
| Fe | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Tennantite Subgroup | Cu6(Cu4C22+)As4S12S |
| Cu | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Tennantite Subgroup | Cu6(Cu4C22+)As4S12S |
| Sr | Strontium | |
| Sr | ⓘ Goyazite | SrAl3(PO4)(PO3OH)(OH)6 |
| Sr | ⓘ Svanbergite | SrAl3(PO4)(SO4)(OH)6 |
| Sb | Antimony | |
| Sb | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| W | Tungsten | |
| W | ⓘ Hübnerite | MnWO4 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Great Plains DomainDomain
- Southern Rocky MountainsOrogenic Belt
USA
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
Detroit City Mine, Detroit City Claim Block, Mount Bross, Alma Mining District, Park County, Colorado, USA