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1-11.5 Keith, S.B., 1989, Petrochemical variations in Laramide magmatism and their relationship to Laramide tectonic and metallogenic evolution in Arizona and adjacent regions: Arizona Geological Society Digest, v. 16, p. 89-101.
1-11.5 Keith, S.B., 1989, Petrochemical variations in Laramide magmatism and their relationship to Laramide tectonic and metallogenic evolution in Arizona and adjacent regions: Arizona Geological Society Digest, v. 16, p. 89-101.
ABS
Petrochemical serial variations ofLaramide (85 – 43 Ma) magmatism in Arizona andadjacent regions can be empirically linked toLaramide tectonic and metallogenic evolution.
This communication represents petrochemicaldata for various Laramide ageigneous rocks. The Laramide igneous rocksare major components of regional,sequentially overprinted stratotectonicassemblages that generally migrate eastwardwith decreasing age. Definition and detailed discussion of the rocks and structuresassociated with the stratotectonicassemblages are presented in Keith and Wilt(1986). This paper will concentrate onpetrogenetic and metallogenic description andinterpretation of Laramide magmatism and itsclosely associated metallogeny. Variationdiagrams and the fields shown on them forLaramide magmatism are based on a worldwidechemical classification of igneous rock series being developed by the author.Empirical relationships betweenpetrochemistry of igneous rocks and metalcontents of associated mineral deposits haveled to this classification.
Key words
1-11.5 Keith, S.B., 1989, Petrochemical variations in Laramide magmatism and their relationship to Laramide tectonic and metallogenic evolution in Arizona and adjacent regions: Arizona Geological Society Digest, v. 16, p. 89-101.
ABS
Petrochemical serial variations ofLaramide (85 – 43 Ma) magmatism in Arizona andadjacent regions can be empirically linked toLaramide tectonic and metallogenic evolution.
This communication represents petrochemicaldata for various Laramide ageigneous rocks. The Laramide igneous rocksare major components of regional,sequentially overprinted stratotectonicassemblages that generally migrate eastwardwith decreasing age. Definition and detailed discussion of the rocks and structuresassociated with the stratotectonicassemblages are presented in Keith and Wilt(1986). This paper will concentrate onpetrogenetic and metallogenic description andinterpretation of Laramide magmatism and itsclosely associated metallogeny. Variationdiagrams and the fields shown on them forLaramide magmatism are based on a worldwidechemical classification of igneous rock series being developed by the author.Empirical relationships betweenpetrochemistry of igneous rocks and metalcontents of associated mineral deposits haveled to this classification.
Key words
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