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Cape Mountain Deposit

Past Producer in Alaska, United States with commodities Tin, Fluorine-Fluorite, Tungsten, Zinc
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Geologic information

Identification information

Deposit ID 10101035
MRDS ID A016000
Record type Site
Current site name Cape Mountain Deposit
Alternate or previous names Bartels Mines, Claims: North Star, Lucky Queen, Numerous Others

Geographic coordinates

Geographic coordinates: -167.95787, 65.58481 (WGS84)
Relative position HEAD OF CAPE CR.
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • 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).

Commodities

Commodity Importance
Tin Primary
Fluorine-Fluorite Tertiary
Tungsten Tertiary
Zinc Tertiary

Comments on the commodity information

  • ANOM. BE IN SS SAMPLES

Materials information

Materials Type of material
Cassiterite Ore
Fluorite Ore
Scheelite Ore
Sphalerite Ore

Alteration

  • (Local) 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

Analytical data

Result HIGH GRADE REPLACEMENT BODIES CONTAIN UP TO 32.93% SN, 18 SAMPLES AVERAGED 7.05% SN, USBM RI 6737, TABLE 7, P. 25
Result 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.

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Cape Mt. Pluton;Cape Mt. Pluton;Cape Mt. Pluton
    Rock description Cape Mt. Pluton;Cape Mt. Pluton;Cape Mt. Pluton

Nearby scientific data

(1) -167.95787, 65.58481
ListMap

Controls for ore emplacement

  • Contact Aureole; Some Localization By Faults

Comments on the geologic information

  • 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.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both metallic and non-metallic
Deposit size Small
Significant No
Discovery year 1902
Year of first production 1905

Production statistics

  • Year 1905
    Material CONC SN
    Accuracy Estimate
    Description Ap_Grade: ^64% Sn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Conc. Tin Tin 64wt-pct

Comments on the production information

  • SHIPMENT LOST EN ROUTE TO ENGLAND.

Comments on the workings information

  • 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.

Comments on development

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

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A016000

Bibliographic references

  • Deposit

    USGS BULLETIN 358, P. 34-41.

  • Deposit

    USGS BULLETIN 733, P. 96-102.

  • Deposit

    USBM RI 3978.

  • Deposit

    USBM RI 6737.

  • Deposit

    USGS OFR 77-796-B, P. 4, LOCS. 3, 5.

  • Deposit

    USGS BULLETIN 1786 (IN PRESS), LOC. SP1.

  • Deposit

    GSA ABS. WITH PROGRAMS, V. 19, NO. 6, P. 368, 374.

  • Deposit

    GSA BULL., V. 94, NO. 6, P. 769-771.

  • Other Database

    BAG-MF-426-01

  • Production

    USBM RI 3978, P. 5.

General comments

Subject category Comment text
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.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1987 Leonard, Kenneth R. (Huber, Donald F.) U.S. Geological Survey
Editor 20-SEP-1994 Mosier, Dan U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.