Willard Mining District, Box Elder County, Utah, USAi
| Regional Level Types | |
|---|---|
| Willard Mining District | Mining District |
| Box Elder County | County |
| Utah | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Type:
Mindat Locality ID:
37347
Long-form identifier:
mindat:1:2:37347:7
GUID (UUID V4):
6dca8069-494f-421b-9caf-625dd4453c0b
The Willard mining district is in extreme eastern Box Elder County just a few miles southeast of Brigham City. The district has produced a small amount of iron ore (about 4000 tons) and has some Cu, Pb, and Zn shows, albeit with no recorded base metal production (Bullock, 1970). Total district metal production at modern metal prices is estimated at $236,000. The Wasatch Iron and Gold Company property is the only recognized producer in the district.
The Willard district lies on the western face of the Wasatch Range of the Middle Rocky Mountain province. The district is underlain by Neoproterozoic Mineral Fork Tillite thrust over Cambrian quartzite, shale, and carbonate rocks by the Willard thrust. No intrusive igneous rocks are recognized in the Willard district.
Mineralization (Fe Β±Cu) occurs in northwest-trending fault zones associated with the Willard thrust and in its upper plate (Doelling, 1980). Bullock (1970) reported a few thousand tons of iron ore were shipped as smelter flux from the Wasatch Iron and Gold mine fissure fillings and replacement deposits along these northwest-trending faults. The main western orebody was reportedly about 20 ft wide by 160 ft long and averaged about 48% Fe. The ore was composed of hematite, magnetite, specularite, and had minor malachite (Bullock, 1970). Doelling (1980) reported that the remaining small, scattered Pb-Ag βpods and bunchesβ of ore in the mine workings are too discontinuous to be economically extracted. Most of the other base metal prospects in the district display minor Cu-staining along narrow veins, fractures, or local narrow replacements.
The Willard district lies on the western face of the Wasatch Range of the Middle Rocky Mountain province. The district is underlain by Neoproterozoic Mineral Fork Tillite thrust over Cambrian quartzite, shale, and carbonate rocks by the Willard thrust. No intrusive igneous rocks are recognized in the Willard district.
Mineralization (Fe Β±Cu) occurs in northwest-trending fault zones associated with the Willard thrust and in its upper plate (Doelling, 1980). Bullock (1970) reported a few thousand tons of iron ore were shipped as smelter flux from the Wasatch Iron and Gold mine fissure fillings and replacement deposits along these northwest-trending faults. The main western orebody was reportedly about 20 ft wide by 160 ft long and averaged about 48% Fe. The ore was composed of hematite, magnetite, specularite, and had minor malachite (Bullock, 1970). Doelling (1980) reported that the remaining small, scattered Pb-Ag βpods and bunchesβ of ore in the mine workings are too discontinuous to be economically extracted. Most of the other base metal prospects in the district display minor Cu-staining along narrow veins, fractures, or local narrow replacements.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities19 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Gold | 1.AA.05 | Au |
| β | Silver | 1.AA.05 | Ag |
| β | Copper | 1.AA.05 | Cu |
| β | Graphite | 1.CB.05a | C |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Chalcocite | 2.BA.05 | Cu2S |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Galena | 2.CD.10 | PbS |
| β | Stibnite | 2.DB.05 | Sb2S3 |
| β | Pyrite | 2.EB.05a | FeS2 |
| β | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
| Group 4 - Oxides and Hydroxides | |||
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| β | Hematite | 4.CB.05 | Fe2O3 |
| β | var. Specularite | 4.CB.05 | Fe2O3 |
| β | Quartz | 4.DA.05 | SiO2 |
| β | 'Bindheimite' | 4.DH.20 | Pb2Sb2O6O |
| β | Uraninite | 4.DL.05 | UO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| β | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Anglesite | 7.AD.35 | PbSO4 |
| Group 9 - Silicates | |||
| β | Zircon | 9.AD.30 | Zr(SiO4) |
| β | var. Cyrtolite | 9.AD.30 | Zr[(SiO4),(OH)4] |
| β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| β | 'Clay minerals' | - | |
| β | 'Limonite' | - | |
List of minerals for each chemical element
Fossils
This region is too big or complex to display the fossil list, try looking at smaller subregions.Localities in this Region
- Utah
- Box Elder County
Other Regions, Features and Areas that Intersect
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.
References
