The Pend Oreille mine is located in the American state of Washington.
The property consists of 5,798 acres of fee simple property, 487 acres of
patented mining claims, and 1,925 acres of unpatented mining claims in Metaline
Pend Oreille is an underground operation that is mining a rich zinc-lead ore
body. Processing is done by flotation and the resulting concentrate is shipped
to Teck’s Trail for smelting. Teck owns 100% interest in the tenements.
In February 2009, Teck temporarily suspended operations at the Pend Oreille
mine due to economic factors. The operation will remain on care and maintenance
until market conditions improve.
The Pend Oreille mine is located in Metalline Falls in northeastern
Washington State, USA.
Pend Oreille County is a county located in the US state of Washington. The
name Pend Oreille derives from a French-Canadian fur trade moniker for local
Indians who probably wore large ear pendants. The mountainous area was
populated by indigenous people first, and then travelled by fur traders and
explorers, followed by missionaries, miners, loggers and homesteaders. The
area’s most successful economic activities proved to be mining and logging
followed by dairy farming.
Geology & Mineralization
The Pend Oreille mine is a carbonate hosted zinc-lead ore body situated
within the Metaline Formation in the southern portion of the Kootenay arc, an
arcuate, narrow belt of sedimentary, volcanic and metamorphic rocks separating
Precambrian metasediments to the east and Mesozoic volcanic and sedimentary
units to the west.
Mineralization at the Pend Oreille mine is located within the Yellowhead
horizon of the Metaline Formation, an intensely altered stratabound dolomitic
solution breccia, which has been invaded and replaced by fine grained pyrite
with lesser zinc and lead sulphides. The sulphide zone has relatively simple
mineralogy. Sphalerite and galena are the two ore minerals of interest. Gangue
minerals include pyrite, dolomite and calcite.
Reserves & Resources: 1.71 Mt at 6.1% zinc, 1.2% lead (p+p, Dec2011).
Inferred resources stood at 2,430 t grading 5.9% zinc and 1.2% lead.
Mining & Operation
The underground mine began commercial production in early 2004.
The Pend Oreille operations were suspended in February 2009, and the mine
was placed on care and maintenance. The operation will remain on care and
maintenance until market conditions improve.
Pend Oreille process flow sheet consists of a conventional crushing,
grinding and flotation for obtaining zinc and lead rich concentrates.
Concentrates are being trucked to the Trail smelter, some 80 km to the
northwest in British Columbia, Canada.