Ore fluids in the porphyry copper deposit at Copper Canyon, Nevada

Journal of Research of the U. S. Geological Survey, 1974, volume 2, issue 1

“…The prevalence of homogeneous liquids at Bagdad contrasts sharply with fluids at Copper Canyon, Nev. (Nash and Theodore, 1971), and Bingham, Utah (Roedder, 1971; W. J. Moore and Nash, unpub.…”

“…In this environment, temperatures above 400 C are difficult to maintain because of the cooling effects of irreversible adiabatic expansion ("throttling"), boiling, and mixing with ground water (Toulmin and Clark, 1967;Rose, 1970). There is ample evidence in theory and in fluid inclusions that "moderate" temperature (<400°C) hydro thermal fluids can be expected to introduce or remobilize copper or molybdenum within the host intrusion as well as in intruded host rocks as at Copper Canyon (Nash and Theodore, 1971).…”

Geochemistry and geology of deep drill holes at Iron Canyon, Lander County, Nevada

“…5). The widespread pyritization around the Copper Canyon stock is probably related to early postmagmatic fluids associated with potassic alteration assemblages in the core of the pyritized area (Nash and Theodore, 1971). Celsian and sphalerite at Iron Canyon were deposited probably near the end of the pyritic alteration range.…”

“…Since there was notable introduction of barium and manganese concomitant with the alteration at Iron Canyon, some gold here may have been introduced before, or even after the pyritic alteration itself. Native gold was introduced during the last stages of metallization in more intensely altered rock near the core of the pyrite zone at Copper Canyon (Nash and Theodore, 1971). The number of elements strongly associated with gold generally decreases radially outward from the pyritic rocks, which contain many of the known deposits in the mining district.…”

Etude des mineralisations alterations et phases fluides associees au gite Devlin (Chibougamau Quebec Canada)

“…Par contre, dans les gîtes d'âge cénozoïque, Hollister et al (1975) (V/T = 40%) (Nash et al, 1971). TYPE I: caractéristique de la zone périphérique, V/T= 15%, salinité: 2 à 5% poids NaCl;…”