On the Blind River uranium ores and their origin

Rare Earth Deposits of North America

“…The heavy minerals in this ore are believed to be primarily of placer origin with possible enrichment during metamorphism or hydrothermal activity. Of the approximately 230 Mt of ore averaging 0.1% U 3 O 8 estimated to be present in the district in 1973 (Robertson, 1981), perhaps half remained in the early 1990s. Uranium mining ended in 1996, but mining may resume if uranium prices remain high, and HREE and Y could conceivably be produced as by‐products.…”

Uranium Ore Deposits

“…U30 8 (Robertson 1987). Remaining reserves are about 300000 to 350000mt U30 8 , recoverable at costs of up to $120/lb.…”

“…At sites where uraninite-bearing conglomerate of the Matinenda Formation is truncated and eroded by a younger conglomerate, as for example the Ramsay Lake conglomerate, the latter is uraniferous (Robertson 1987). At sites where uraninite-bearing conglomerate of the Matinenda Formation is truncated and eroded by a younger conglomerate, as for example the Ramsay Lake conglomerate, the latter is uraniferous (Robertson 1987).…”

Principal uranium deposits of the world

“…Location: 46° 30' 00" N; 083° 00' 00" W Description: Mineralization is confined to the basal Huronian (early Proterozoic) quartz-pebble conglomerate and feldspathic quartzite of the Martinenda Formation of the Elliot Lake Group, mainly on the north and south limbs of the main syncline (Quirke Lake trough) in valleys that may represent channels in the early Huronian drainage system (Ruzicka, 1971;Lang and others, 1962;. Robertson and Steenlan, 1960) describes the gravel sheets at both Elliot Lake and Agnew Lake as deltaic deposits of a major stream system. The sheets moving progressively north indicate that the point of debouchment and strand line were moving progressively northward as the sea encroached on the land.…”

“…A., 1970Robertson, J. A., , 1974Robertson and Douglas, 1970;Robertson and Steenlan, 1960;Roscoe, 1957Roscoe, , 1969Roscoe and Steacy, 1958;Ruzicka, 1971;Williams and others, 1972. Symbol:…”