Iron No. 1-4

The Iron No. 1-4 is a copper, gold, and silver mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Iron No. 1-4
Secondary: Shaft Creek Copper

Commodity

Primary: Copper
Primary: Gold
Primary: Silver

Location

State: Alaska
District: Hyder

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Unknown
Operation Type: Unknown
Years of Production:
Organization:
Significant: N

Physiography

Not available

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Form: SEE DEPOSIT DESCRIPTION COMMENTS

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Not available

Comments

Comment (Geology): Maas And Others (1995, P. 252) Suggest That The Age Of The Deposits Is Jurassic, Based On Similarities In Mineralogy, Structural Setting, And Hostrock, With Isotopically-Dated Jurassic Deposits Nearby In The Hyder District (For Example, See Bc065, 067), And At The Scottie Gold Mine Nearby In British Columbia (Alldrick, 1993). If So, The Deposits Are Contemporaneous, At Least In Part, With Island-Arc Volcanism In Hazelton Time (Alldrick, 1993).

Comment (Workings): The Prospects Have Been Explored By Small Pits And Trenches; There Is A Flooded Shaft On Shaft Creek Copper Prospect. Various Samples Of The Deposits Collected By The U. S. Bureau Of Mines In 1992 Or 1993 (Maas And Others, 1995. P. 260) Contain Up To 14.74 PPM Au (Iron No. 2), 64.11 PPM Ag (Iron No. 4), 17.3% Cu (Shaft Creek Copper), 6370 PPM Pb (Iron No. 4), And 6840 PPM Zn (Iron No. 4).

Comment (Deposit): The Country Rocks In The General Area Of This Site Are Pelitic Metasedimentary And Subordinate Andesitic Metavolcanic (Greenstone) Strata Of The Jurassic Or Older Mesozoic Hazelton Group; The Triassic Texas Creek Granodiorite, Which Underlies And Locally Intrudes The Hazelton; The Eocene Hyder Quartz Monzonite, Which Intrudes The Hazelton And Texas Creek Rocks; And Still-Younger Tertiary Lamprophyre Dikes, Which Cut All The Other Rocks (Smith 1973, 1977; Koch, 1996). Maas And Others (1995, P. 252, 260) Describe The Deposits As Veins, Disseminations, And Masses Of Gold-Bearing Pyrrhotite With Associated Chalcopyrite And Arsenopyrite, And Local Sphalerite And Galena. Individual Mineralized Zones Range From About 60-450 Feet Wide And Are Located Near Or In Shears In Hazelton Volcanic Rocks (Greenstone). The Prospects Roughly Align With The Contact Between Hazelton Volcanics And Texas Creek Granodiorite, And Are Never More Than About 1300 Feet In Lateral Distance From The Surface Exposure Of That Contact.

Comment (Location): This Site Consists Of A 0.6-Mile-Long, North-Northeast-Trending Line Of Prospects In Section 1 Between Elevations 2600-3250 Feet On The Divide Between Skookum And Fish Creeks (Maas And Others, 1995, P. 252 And Fig. 66). The Above Coordinates Are For The Approximate Center Of This Line Of Prospects, All Of Which Are Within A Half-Mile Of The Map Location.

Comment (Production): Small Amount Of Ore Stored At Shaft Creek Copper Prospect.

Comment (Deposit): Maas And Others (1995, P. 252) Suggest That The Age Of The Deposits Is Jurassic, Based On Similarities In Mineralogy, Structural Setting, And Hostrock, With Isotopically-Dated Jurassic Deposits Nearby In The Hyder District (For Example, See Bc065, 067), And At The Scottie Gold Mine Nearby In British Columbia (Alldrick, 1993). If So, The Deposits Are Contemporaneous, At Least In Part, With Island-Arc Volcanism In Hazelton Time (Alldrick, 1993).

References

Reference (Deposit): Koch, R. D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728A, 35 p.,1 sheet, scale 1:250,000.

Reference (Deposit): Smith, J.G., 1973, A Tertiary lamprophyre dike province in southeastern Alaska: Canadian Journal of Earth Sciences, v. 10, p. 408-420.

Reference (Deposit): Smith, J.G., 1977, Geology of the Ketchikan D1 and Bradfield Canal A-1 quadrangles, southeastern Alaska: U.S. Geological Survey Bulletin 1425, 49 p.

Reference (Deposit): Alldrick, D. J., 1993, Geology and metallogeny of the Stewart mining camp, northwestern British Columbia: British Columbia Department of Mines and Petroleum Resources Bulletin no. 85, 105 p., 2 plates."

Reference (Deposit): Maas, K. M., Bittenbender, P. E., and Still, J. C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U. S. Bureau of Mines Open-File Report 11-95, 606 p.

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