Riley Extension

Past Producer in Humboldt county in Nevada, United States with commodities Copper, Lead, Tungsten, Zinc

Geologic information

Identification information

Deposit ID 10149720
MAS/MILS ID 0320130046
Record type Site
Current site name Riley Extension

Geographic coordinates

Point of reference Trench
Geographic coordinates: -117.25596, 41.19409 (WGS84)
Elevation 1829
Location accuracy 100(meters)
(click for info)

Geographic areas

Country State County
United States Nevada Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 038 N 042 E 04 E2SWSW Nevada


Commodity Importance
Copper Tertiary
Lead Tertiary
Tungsten Tertiary
Zinc Tertiary

Materials information

Materials Type of material
Diopside Unknown
Epidote Unknown
Garnet Unknown
Quartz Unknown
Scheelite Unknown
Wollastonite Unknown

Nearby scientific data

Trench (1) -117.25596, 41.19409

Ore body information

  • Dip 50E
    Thickness 3M
    Depth to top 0M
    Width 183M
    Length 107M
    Area 8HA
    Field Value
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 TABULAR
    Primary mode of Origin CONT METASOMATIC
    Primary Ore Control LITHOLOGY
    Secondary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONATE SILIC
    Type of Wallrock Alter. #2 SILICIFICATION
    Strike And Dip
    Avg. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 8
    Date of Last Modification 811112

Economic information

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Potosi District

Mineral rights holdings

Type of mineral rights Fee Ownership

Land status

Ownership category BLM Administrative Area

Workings at the site

  • Type of workings Underground
    Length 976M
    Overall depth 56M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    Capacity 100
    Capacity Units MT ORE/DAY
    Unit Production Cost 25
    Units of Production $/MT ORE

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
U.S. Bureau of Mines Minerals Availability System MAS 0320130046

Bibliographic references

  • Deposit

    USGS PROF PAPER 431,1964,P.105-108,PL.6,7

  • Deposit

    NEV BUR OF MINES BULL 44,1946,P.21

  • Deposit

    NEV BUR OF MINES BULL 59,1964,TB19

Reporter information

Type Date Name Affiliation Comment
Reporter 04-MAR-92 Western Field Operations Center (WFOC) U.S. Bureau of Mines