The Company has staked 29 unpatented mining claims (the BJM claims) close to and around the patented claims known as the Blue Jacket mine, which was a mine that produced intermittently in and around 1905 but never reached substantial, continuous production. The patented claims affiliated with the Blue Jacket mine are not related or affiliated with the BJM claims known as the Blue Jacket project. Sampling on the BJM claims has revealed several high-grade copper results along with other elements. The analysis by the Company and consultants who have examined the claims, and in consideration of historic data, is that the property has potential to be a substantial copper deposit which would carry strong credits of both silver and gold.
The ore stock pile material consists of mostly of colorful oxide-copper minerals (malachite, atacamite, azurite); covellite, and tenorite were also noted. Chalcocite is abundant with minor relict chalcopyrite. The copper mineralization occurs hosted by pyritiferous vuggy silica. Accessory barite is also present. The larger dump to the principal shaft is comprised of highly pyritiferous vuggy silica without much, if any, copper mineralization. The vuggy silica appears to represent the vein zone and to be developed after alteration of aporphyry intrusion. The character of the dump material is typical of a high-sulfidation-type mineralization related to a source, deeper-seated, porphyry copper intrusion. The host rocks are typical of the Permian-Jurassic Seven Devils Terrane-dark-green andesitic volcaniclastic, porphyritic sill(?)-like intrusion and red laminated argillite. These rocks are identical to those observed in the Cuprumarea–not too far to the south. However, the style of mineralization at Bluejacket mine area is not at all like the sill-hosted veinlet and disseminated copper sulfide (bornite, chalcopyrite) at Copper Cliff. Instead, the Bluejacket mine appears have explored high-sulfidation veins related to a source porphyry copper intrusion.
Two well-done technical reports (link below in Resources) were found on the Idaho Bureau of Mines and Geology website (F.E. Johnesse, 1936; and J.A. Church, 1906). These reports are good reading and give detailed descriptions of the mine development history, geologic relationships, and nature of the mineralization. Assay results for gold, silver and copper are given for 65 chip/channel samples with locations provided on a plan map of the mine workings.
The two oxide-copper mineralized showings found during claim staking and were examined and sampled. Both are located on the steep, south-facing slope to a ridge south of Kirkwood Creek drainage–approximately an airline kilometer southeast of theBluejacket Mine.
The upper prospect consists of pit (four meters deep) exposing quartz hosted by andesitic clayey siltstone with a strong chloritic foliation fabric. The quartz vein and sericitic alteration envelope strike N600W (300°azimuth) and dips 65° northeast–cutting across the metamorphicf oliation, which strikes N60°E and dips 70° to the southeast. Oxide-copper (malachite)and limonite/goethite occur within the quartz vein and along the schistose and later fracture surfaces. At the northwest end of the pit, the width of mineralized zone is two-meters and gradually pinches out in a southeast direction.There did not appear to be any along-strike extensions suggesting the occurrence is perhaps a boudin or in-fill of an isolated dilatant opening.The single sample of vein and wall rock collected comprised of oxide-copper (malachite) ran 5% copper, 5.50 oz/ton silver with anomalous lead and zinc. Of note, the sample also ran anomalous molybdenum (321 ppm) suggesting the vein is porphyry copper related.
The lower prospect is a shallow excavation along a north-northeast trending, steeply dipping quartz vein with colorful oxide-copper (malachite, tenorite). The vein is approximately five centimeters width.Relict chalcopyrite was also noted. Assay results on the one grab sample runs 6.8% copper with 0.43oz/ton silver and weakly anomalous zinc.
Blue Jacket Mine Reports – Frank E. Johnesse, John A. Church
Mining Districts of Idaho Map provided with permission by Idaho Geological Survey (highlighting of Mining District added).