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Vein Deposits Hosted by Plutonic Rocks in the Croesus Stock and Hailey Gold Belt Mineralized Areas, Blaine County, Idaho: Usgs Bulletin 2064-X (en Inglés)
Ronlad G. Worl
(Autor)
·
Reed S. Lewis
(Autor)
·
Bibliogov
· Tapa Blanda
Vein Deposits Hosted by Plutonic Rocks in the Croesus Stock and Hailey Gold Belt Mineralized Areas, Blaine County, Idaho: Usgs Bulletin 2064-X (en Inglés) - Worl, Ronlad G. ; Lewis, Reed S.
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Reseña del libro "Vein Deposits Hosted by Plutonic Rocks in the Croesus Stock and Hailey Gold Belt Mineralized Areas, Blaine County, Idaho: Usgs Bulletin 2064-X (en Inglés)"
Mineral deposits in the Croesus and Hailey gold belt mineralized areas in Blaine County, south-central Idaho, are preciousand base-metal quartz veins that are part of a family of vein deposits spatially and temporally associated with the Idaho batholith. Historic production from these veins has been mainly gold and silver. Host rocks are older border phase plutons of the Idaho batholith that are characterized by more potassium and less sodium as compared to rocks from the main body of the batholith to the west. Host structures are reverse faults that have moderate to shallow dips to the northeast and high-angle normal faults that also strike northwest. The veins are characterized by several generations of quartz and generally sparse sulfide minerals; gold is associated with late-stage comb quartz. The precious-metal ore bodies are in a series of shoots, each of which is as much as 8 ft in width, 400 ft in breadth, and 1,000 ft in pitch length.
