Vote for your favorite mineral in #MinCup26! - Arsenuranylite vs. Talc
It's a pair of soft and lovely minerals as Stichtite and Talc compete for your votes.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Upper Bosart Prospect, Kantishna Mining District, Denali Borough, Alaska, USAi
Regional Level Types
Upper Bosart ProspectProspect
Kantishna Mining DistrictMining District
Denali BoroughBorough
AlaskaState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
63° 34' 10'' North , 150° 54' 25'' West
Latitude & Longitude (decimal):
63.56944,-150.90694
GeoHash:
G#: bek9wh2yv
GRN:
N43W51
Type:
Prospect
Köppen climate type:
Dfc : Subarctic climate
Mindat Locality ID:
202715
Long-form identifier:
mindat:1:2:202715:2
GUID (UUID V4):
0


The prospect is in Denali National Park and Preserve.
Location: The Upper Bosart prospect is at an elevation of about 3100 feet on north spur of Wickersham Dome. It is in the NE1/4 SE1/4 of section 31, T. 15 S., R. 17 W. Fairbanks Meridian. The location is accurate within 300 feet. The site corresponds to number 35 of Bundtzen, Smith, Tosdal (1976), 41 of Bundtzen (1981), 47 of Thornsberry, McKee, and Salisbury (1984), and 112 of Hawley and Associates (1978).
Geology: The country rocks at the Upper Bosart prospect are quartz-feldspar schist and micaceous quartz schist of the upper Precambrian Birch Creek Schist (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, v. 2, occurrence 47). The deposit consists of a mineralized quartz-siderite(?) vein that is poorly exposed in shallow trenches. The vein strikes about N 40 E, dips steeply, and ranges from about 1 to 4 feet thick. Selected sulfide-rich samples assayed up to 0.88 percent copper, 32.8 percent lead, 20.4 percent zinc, 1.36 percent antimony, and 26.4 ounces of silver per ton. A representative sample assayed about 1.5 ounces of silver per ton, 2.75 percent lead, and 1.15 percent zinc (Thornsberry, McKee, and Salisbury, 1984; Hawley and Associates, 1978). The assay values suggest that the sulfide minerals include galena, sphalerite, tetrahedrite, and possibly stibnite. The deposit is similar to those at the Florence (MM082) and Bosart (MM074) prospects.
Workings: The prospect was explored by shallow trenches, only some of which reached bedrock. The date of this work is not known, but the nearby Bosart vein (MM074) was first prospected before 1931 (Wells, 1933).
Age: The deposit is assumed to be Eocene (see record MM091).

Commodities (Major) - Ag; (Minor) - Cu, Pb, Sb, Zn
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


5 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘGalena2.CD.10PbS
ⓘStibnite2.DB.05Sb2S3
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘSiderite5.AB.05FeCO3

List of minerals for each chemical element

CCarbon
Cⓘ SideriteFeCO3
OOxygen
Oⓘ QuartzSiO2
Oⓘ SideriteFeCO3
SiSilicon
Siⓘ QuartzSiO2
SSulfur
Sⓘ GalenaPbS
Sⓘ SphaleriteZnS
Sⓘ StibniteSb2S3
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
FeIron
Feⓘ SideriteFeCO3
CuCopper
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znⓘ SphaleriteZnS
SbAntimony
Sbⓘ StibniteSb2S3
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
PbLead
Pbⓘ GalenaPbS

Other Databases

Link to USGS - Alaska:MM069

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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

Bundtzen, T.K., 1981, Geology and mineral deposits of the Kantishna Hills, Mt. McKinley quadrangle, Alaska: M. S. Thesis, University of Alaska, College, Alaska, 238 p. Bundtzen, T.K., Smith, T.E., and Tosdal, R.M., 1976, Progress report--Geology and mineral deposits of the Kantishna Hills: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-98, 80 p., 2 sheets, scale 1:63,360. Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p. Hawley, C. C. and Associates, Inc, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U. S. Bureau of Mines Open-File Report 24-78, 275 p. (paged by sections). Thornsberry, V. V., McKee, C. J., and Salisbury, W. G., eds, 1984, 1983 Mineral Resource Studies: Kantishna Hills and Dunkle Mine Areas, Denali National Park and Preserve, Alaska: U. S. Bureau of Mines Open-File Report 129-84. 3 Volumes: v. 1, Text; v. 2, Appendices; v. 3, Maps. Prepared by Salisbury & Dietz, Inc., Spokane, WA. Wells, F. G., 1933, Lode deposits of Eureka and vicinity, Kantishna district, Alaska: U. S. Geological Survey Bulletin 849-F, p. 335-379.
Quick NavTopCommoditiesMineral ListOther DatabasesOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 8, 2026 00:17:27 Page updated: August 12, 2025 11:09:31
Go to top of page