Bluebird Nickel-Copper Copper Occurrence
The Bluebird Nickel-Copper Copper Occurrence is near Limestone, Montana. Historically the site has been associated with the Stillwater Mining District which is now part of the Gallatin National Forest. Ore mineralization has been found at this location and the size of the deposit is estimated to be small, however the precise grade, tonnage, and extent of the mineralization are not known. There has been no production and little to no activity other than routine claim maintenance since the mineral discovery. The ore mined is composed of chalcopyrite, pentlandite and pyrrhotite with waste material consisting primarily of plagioclase and magnetite. The ore body has a lenticular or lens shaped form of unknown dimensions. The host rock in this area is peridotite from the Lower Cretaceous epoch 145.00 to 100.50 million years ago. The Middle Rocky Mountains physiographic province of the Rocky Mountain System characterize the geomorphology of the surrounding area.
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Additional textual information about a site or mine.
DEPOSIT IS PROBABLY SIMILAR TO MOUAT. GEOCHEMICAL ANOMALY IN AREA OF DEPOSIT.
IN CUSTER NATIONAL FOREST. UNSURVEYED. GENERALIZED LOCATION.
Formal or informal mining district names.
Processes that concentrated or enriched the mineralization of the mine.
AGE OF STILLWATER COMPLEX IS 2, 705 +/-4 MA BASED ON U-LEAD SYSTEMATICS ON ZIRCON-BADDELEYITE (PREMO AND OTHERS, 1990).
Characteristics of the ore body.
Geological materials at the site.
Geologic structural features affecting or characterizing the site or mine.
Tectonic setting in which the site or deposit is situated.
Physiographic area where the resource is found.
Mineralogical and chemical alteration at or near the site, which may help to indicate the geographic extent of the geological processes producing the mine.
Controls on emplacement of ore such as faults or other structural features.
Other deposits in the same region.
Bluebird Cr-Pt Chromium Occurrence
Bluebird Chromium Occurrence
Intial Nickel-Copper Copper Occurrence
West Fork East Adit
Initial Cr-Pt Platinum Occurrence
Dow Palladium Occurrence
Groundhog Chromium Mine
West Fork Group
West Fork Cr-pt Tuttle Chromium Occurrence
West Fork Palladium Occurrence
* Mine bounds on map indicate the general area that a mine occupies. For an detailed map, refer to the overseeing BLM field office.
** The mine central point is based on an average of the mine's bounding box(es) and does not necessarily fall on the claim itself.
1 World-class significance is determined by total endowment of the contained commodity. This includes all past production and remaining reserves. Each commodity is considered separately and commodities cannot be combined to arrive at a significant size. The tonnage thresholds are from the mine model grade-tonnage studies. As of June 2008, many entries were classified as significant under less strict rules.
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SEE PAGE (1979) FOR GENERAL DESCRIPTION OF BASAL SERIES MINERALIZATION. NO PUBLISHED PGE DATA AVAILABLE FOR THIS AREA.