SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
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 ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced 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 MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Iron Cap Prospect (ARDF - BC045), Hyder District, Prince of Wales-Outer Ketchikan Borough, Alaska, USA

This page is currently not sponsored. Click here to sponsor this page.
 
 
Prospect originally staked in 1923.
Location: The Iron Cap prospect is at the south boundary of Section 11 at an elevation of about 3850 feet on a south-facing mountainside overlooking the West Fork of Texas Creek, and about 1.8 mile east-northeast of the outlet of Texas Lake (Elliott and Koch, 1981, p. 14, loc. 45). The location is accurate to within about a quarter of a mile.
Geology: The country rocks in the area of the Iron Cap prospect are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group, which is underlain and locally intruded by the Triassic Texas Creek Granodiorite (Smith, 1977; Koch, 1996). The deposit (Buddington, 1929, p. 44, 98) consists of an 11-foot zone of slate and fine-grained tuffaceous graywacke containing stringers and veins of sulfides, and a 2-foot quartz-calcite vein carrying pyrrhotite, chalcopyrite, sphalerite, and a little arsenopyrite. The deposit, which is about 100 feet above the contact of the Texas Creek Granodiorite, is approximately parallel to the bedding in the slate and graywacke hostrocks. A sample (Buddington, 1925, p. 95) assayed 0.04 oz Au and 6.28 oz Ag per ton, and 2% Cu.
Workings: Deposit was explored in 1920's by an opencut 12 feet wide. A sample (Buddington, 1925, p. 95) assayed 0.04 oz Au and 6.28 oz Ag per ton, and 2% Cu.
Alteration: Slate and graywacke country rocks are impregnated with sulfide minerals.

Commodities (Major) - Ag, Au, Cu, Zn
Development Status: None
Deposit Model: Polymetallic veins

Mineral List



6 entries listed. 6 valid minerals.

The above list 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

Buddington, A.F., 1925, Mineral investigations in southeastern Alaska: U.S. Geological Survey Bulletin 773-B, p. 71-139. Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p. Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360. Koch, R.D., 1996 [In press), Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report, 1 sheet, scale 1:250,000. Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p., 1 plate.

 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 17, 2019 21:30:03 Page generated: January 18, 2015 21:01:17
Go to top of page