Cape Mountain Deposit

The Cape Mountain Deposit is a tin 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

Name: Cape Mountain Deposit

State: Alaska

County: na

Elevation:

Commodity: Tin

Lat, Long: 65.58556, -167.95444

Map: View on Google Maps

Cape Mountain Deposit MRDS details

Site Name

Primary: Cape Mountain Deposit
Secondary: Bartels Mines
Secondary: Claims: North Star, Lucky Queen, Numerous Others

Commodity

Primary: Tin
Tertiary: Fluorine-Fluorite
Tertiary: Tungsten
Tertiary: Zinc

Location

State: Alaska

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Year: 1905
Material type: CONC SN
Description: Ap_Grade: ^64% Sn

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1905
Discovery Year: 1902
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Early Scapolite (99-60%) - Amphibole (1-40%) Skarn Associated With Seriate Granite; Later Pyroxene (90-60%) - Garnet (10-40%) - Fluorite (3-5%) - Equigranular (Mica-Troumaline-Fluorite) Granite

Rocks

Not available

Analytical Data

Analytical Data: MOST SAMPLES FROM UNDERGROUND WORKINGS OF BARTELS MINE CONTAINED LESS THAN .05% SN, MAX. VALUES OBTAINED WERE: 10.9% SN (OVER 3 IN WIDTH), LESS THAN 0.05% WO3, AND 1.86% CAF2, DATA FROM USBM RI 3978, FIGS. 5-7 AND P. 15.
Analytical Data: HIGH GRADE REPLACEMENT BODIES CONTAIN UP TO 32.93% SN, 18 SAMPLES AVERAGED 7.05% SN, USBM RI 6737, TABLE 7, P. 25

Materials

Ore: Cassiterite
Ore: Fluorite
Ore: Sphalerite
Ore: Scheelite

Comments

Comment (Commodity): ANOM. BE IN SS SAMPLES

Comment (Location): USBM RI 3978, FIG. 2-4; USBM RI 6737, FIG. 6. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Deposit): SN MINERALIZATION IN 200-300 FT CONTACT ZONE ALONG NE MARGIN OF CAPE MTN. PLUTON; MODES OF OCCURRENCE: (1) CASSITERITE AND PYRITE IN TOURMALINIZED PERIPHERAL ZONES OF GRANITE AND DIKES; (2) CONTACT METAMORPHOSED LIMESTONE (SKARN ASSEMBLAGES); (3) CASSITERITE-BEARING QUARTZ VEINS IN GRANITE; AND (4) DISCONTINUOUS HIGH-GRADE LENTICULAR PODS OF REPLACED LIMESTONE; REPLACEMENT BODIES CONSIST OF QUART-MUSCOVITE-SERICITE-CALCITE-ACTINOLITE-TREMOLITE-CASSITERITE ASSEMBLAGE, LOCALLY VERY HIGH GRADE; TACTITE MIENRALS: WOLLASTINITE, PYROXENE, TOURMALINE, PYRITE, PYRRHOTITE, FLUORITE, SCAPOLITE, SPHALERITE, CASSITERITE, SCHEELITE.

Comment (Workings): BARTELS MINE: BETWEN 1150-1250 FT OF UNDERGROUND WORKINGS ON 3 LEVELS AND 1 SUBLEVEL; USBM DUG 21 TRENCHES TOTALING 3690 FT; TOTAL AREA COVERED BY CLAIMS: 490.76AC; SEVERAL SMALL PROSPECTS IN THE AREA.

Comment (Geology): XENOLITHS OF ROOF ROCK IN GRANITE; LIMESTONE OVERLAIN BY QUARTZ-SERICITE SCHIST; YOUNGEST ROCK: OLIVINE PORPHYRY DIKES. CAPE MT. PLUTON; 21 SQ. KM PLUTON COMPOSED OF SERIATE-TEXTURED BIOTITE GRANITE (92%), PEGMATITE-APLITE (5%), AND LATE-STAGE EQUIGRANULAR GRANITE (3%). LCRET K-AR, BITOTITE, 78.8 M.Y PLUS OR MINUS 2.9 M.Y.; REF. 8, P. 769.

Comment (Production): SHIPMENT LOST EN ROUTE TO ENGLAND.

Comment (Development): MAIN DEVELOPMENT: 1903-1909; 38 CLAIMS AND 3 MILL-SITES PATENTED IN 1911-1912; USBM TRENCHING: 1943-44.