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Abstract
10-5 Keith, S. B., 1986, Petrochemical variations in Laramide magmatism and their relationship to Laramide tectonic and metallogenic evolution in Arizona and adjacent regions, in Beatty, B., and Wilkinson, P. A. K., editors, Frontiers in geology and ore deposits of Arizona and the Southwest: Arizona Geological Society Digest, v. 16, p. 89-101.
Abstract
10-5 Keith, S. B., 1986, Petrochemical variations in Laramide magmatism and their relationship to Laramide tectonic and metallogenic evolution in Arizona and adjacent regions, in Beatty, B., and Wilkinson, P. A. K., editors, Frontiers in geology and ore deposits of Arizona and the Southwest: Arizona Geological Society Digest, v. 16, p. 89-101.
ABS
Petrochemical serial variations of Laramide (85 – 43 Ma) magmatism in Arizona and adjacent regions can be empirically linked to Laramide tectonic and metallogenic evolution. This communication represents petrochemical data for various Laramide age igneous rocks. The Laramide igneous rocks are major components of regional, sequentially overprinted stratotectonic assemblages that generally migrate eastward with decreasing age. Definition and detailed discussion of the rocks and structures associated with the stratotectonic assemblages are presented in Keith and Wilt (1986). This paper will concentrate on petrogenetic and metallogenic description and interpretation of Laramide magmatism and its closely associated metallogeny. Variation diagrams and the fields shown on them for Laramide magmatism are based on a worldwide chemical classification of igneous rock series being developed by the author. Empirical relationships between petrochemistry of igneous rocks and metal contents of associated mineral deposits have led to this classification.
Key words
Hillsboro Assemblage, quartz alkalic, Tombstone Assemblage, alkali-calcic, Morenci assemblage, calc-alkalic, Laramide, Wilderness Assemblage, peraluminous, petrology, plate tectonics
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Abstract
10-5 Keith, S. B., 1986, Petrochemical variations in Laramide magmatism and their relationship to Laramide tectonic and metallogenic evolution in Arizona and adjacent regions, in Beatty, B., and Wilkinson, P. A. K., editors, Frontiers in geology and ore deposits of Arizona and the Southwest: Arizona Geological Society Digest, v. 16, p. 89-101.
ABS
Petrochemical serial variations of Laramide (85 – 43 Ma) magmatism in Arizona and adjacent regions can be empirically linked to Laramide tectonic and metallogenic evolution. This communication represents petrochemical data for various Laramide age igneous rocks. The Laramide igneous rocks are major components of regional, sequentially overprinted stratotectonic assemblages that generally migrate eastward with decreasing age. Definition and detailed discussion of the rocks and structures associated with the stratotectonic assemblages are presented in Keith and Wilt (1986). This paper will concentrate on petrogenetic and metallogenic description and interpretation of Laramide magmatism and its closely associated metallogeny. Variation diagrams and the fields shown on them for Laramide magmatism are based on a worldwide chemical classification of igneous rock series being developed by the author. Empirical relationships between petrochemistry of igneous rocks and metal contents of associated mineral deposits have led to this classification.
Key words
Hillsboro Assemblage, quartz alkalic, Tombstone Assemblage, alkali-calcic, Morenci assemblage, calc-alkalic, Laramide, Wilderness Assemblage, peraluminous, petrology, plate tectonics
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