Early Miocene mylonitization and detachment faulting, South Mountains, central Arizona ( USA).

S. J. Reynolds, M. Shafiqullah, P. E. Damon, E. Dewitt

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

The South Mountains of central Arizona are one of the geologically simplest metamorphic core complexes of the N American Cordillera. An early Miocene age of mylonitization is indicated by crosscutting relationships between mylonitic fabroc and a composite pluton dated at 22-25 Ma by Rb-Sr, U-Th-Pb, and K-Ar techniques. The kinematic agreement and close temporal association of mylonitization and detachment faulting support models in which the 2 processes are related to an evolving crustal shear zone that accommodated mid-Tertiary continental extension. -Authors

Original languageEnglish (US)
Pages (from-to)283-286
Number of pages4
JournalGeology
Volume14
Issue number4
DOIs
StatePublished - Jan 1 1986
Externally publishedYes

ASJC Scopus subject areas

  • Geology

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