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Exposure of a late cretaceous layered mafic-felsic magma system in the central Sierra Nevada batholith, California

Contributions to Mineralogy and Petrology

By:
, , , , , ,
DOI: 10.1007/BF00287110

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Abstract

New U-Pb zircon ages for the Lamarck Granodiorite, associated synplutonic gabbro and diorite plutons, and two large mafic intrusive complexes that underlie them in the Sierra Nevada batholith are 92??1 Ma. These ages establish the Late Cretaceous as a period of extensive mafic-felsic magmatism in the central part of the batholith, and confirm the significance of mafic magmatism in the evolution of the voluminous silicic plutions in the Sierran arc. The lack of significant zircon inheritance in any of the units analyzed supports isotopic evidence that the Lamarck and other Late Cretaceous Sierran plutons were derived predominantly from young crust. Recognition of an extensive mafic-felsic magma system in the Sierra Nevada batholith emphasizes the importance of basaltic liquids in the evolution of continental crust in arc settings. ?? 1995 Springer-Verlag.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Exposure of a late cretaceous layered mafic-felsic magma system in the central Sierra Nevada batholith, California
Series title:
Contributions to Mineralogy and Petrology
DOI:
10.1007/BF00287110
Volume
120
Issue:
2
Year Published:
1995
Language:
English
Publisher location:
Springer-Verlag
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
129
Last page:
136
Number of Pages:
8