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1-6 Keith, S. B., and Swan, M. M., 1995, Tectonic setting, petrology, and genesis of the Laramide porphyry copper cluster of Arizona, Sonora, and New Mexico: Arizona Geological Society Digest 20, p. 339-346.
1-6 Keith, S. B., and Swan, M. M., 1995, Tectonic setting, petrology, and genesis of the Laramide porphyry copper cluster of Arizona, Sonora, and New Mexico: Arizona Geological Society Digest 20, p. 339-346.
ABS
In the Arizona-Sonora-New Mexico region of SouthwesternNorth America a cluster of porphyry copper deposits formed duringthe Laramide Orogeny (fig. I). With recent advances in multielementchemical analysis and isotopic age dates, it is nowapparent that the Laramide Orogeny is a petrochemically, stratigraphically,structurally, and metallogenically dynamic event, thusany true reconstruction of the emplacement of the Porphyry CopperCluster requires integration of data in a time and space contextwith empirical petrologic control. This use of petrochemistry toconstrain tectonics, which has been generally overlooked in recentdata synthesis and integration, may be the most important tool forsorting out the evolution of the Porphyry Copper Cluster.
Integration of Porphyry Copper Cluster data from a stratotectonicanalysis by Keith and Wilt (1986) with the magmametalseries classification of Keith and others (1991) indicatesthe Porphyry Copper Cluster is the product of the interaction ofa unique petrology with a metaluminouscalc-alkalicmagmametalseries produced during the Laramide Orogeny by subductionof a 250-mile-long segment of the Farrallon Plate beneaththe North American Craton (fig. 2). Emplacement of the calcalkalicmagmas was controlled by deep-seated transcurrentTexas Zone structures (fig. 3) and was accompanied by assimilationof oxidized fluorine-rich crustal formational fluids associatedwith the 1.4 Ga granitoidbasement.
Key words:
Arizona. classification. copper ores. igneous processes. Laramide Orogeny. magmas. metal ores. metallogeny. Mexico. mineral assemblages. mineral deposits, genesis. mineralization. New Mexico. porphyry copper. Sonora Mexico. structural controls. United States.
1-6 Keith, S. B., and Swan, M. M., 1995, Tectonic setting, petrology, and genesis of the Laramide porphyry copper cluster of Arizona, Sonora, and New Mexico: Arizona Geological Society Digest 20, p. 339-346.
ABS
In the Arizona-Sonora-New Mexico region of SouthwesternNorth America a cluster of porphyry copper deposits formed duringthe Laramide Orogeny (fig. I). With recent advances in multielementchemical analysis and isotopic age dates, it is nowapparent that the Laramide Orogeny is a petrochemically, stratigraphically,structurally, and metallogenically dynamic event, thusany true reconstruction of the emplacement of the Porphyry CopperCluster requires integration of data in a time and space contextwith empirical petrologic control. This use of petrochemistry toconstrain tectonics, which has been generally overlooked in recentdata synthesis and integration, may be the most important tool forsorting out the evolution of the Porphyry Copper Cluster.
Integration of Porphyry Copper Cluster data from a stratotectonicanalysis by Keith and Wilt (1986) with the magmametalseries classification of Keith and others (1991) indicatesthe Porphyry Copper Cluster is the product of the interaction ofa unique petrology with a metaluminouscalc-alkalicmagmametalseries produced during the Laramide Orogeny by subductionof a 250-mile-long segment of the Farrallon Plate beneaththe North American Craton (fig. 2). Emplacement of the calcalkalicmagmas was controlled by deep-seated transcurrentTexas Zone structures (fig. 3) and was accompanied by assimilationof oxidized fluorine-rich crustal formational fluids associatedwith the 1.4 Ga granitoidbasement.
Key words:
Arizona. classification. copper ores. igneous processes. Laramide Orogeny. magmas. metal ores. metallogeny. Mexico. mineral assemblages. mineral deposits, genesis. mineralization. New Mexico. porphyry copper. Sonora Mexico. structural controls. United States.
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