Tectonothermal evolution of the Pinaleno-Jackson Mountain core complex, southeast Arizona

K. B. Long, S. L. Baldwin, G. E. Gehrels

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Petrologic data, U-Pb analyses of zircon, and 40 Ar/ 39 Ar analyses were used to document the tectonothermal history of two mylonite zones and the temporal relationship of mylonite formation to movement on detachment faults in the Pinaleno-Jackson Mountain metamorphic core complex of southeastern Arizona. Heterogeneous age distributions documented over relatively short distances in the lower plate of The Pinaleno-Jackson Mountain metamorphic core complex cannot be readily explained by a model of simple unroofing through a steady-state geotherm. Multiple recrystallization events during mylonite formation, and/or transient thermal events are required to explain the partial and complete isotopic resetting of thermochronometers in this area. -from Authors

Original languageEnglish (US)
Pages (from-to)1231-1240
Number of pages10
JournalGeological Society of America Bulletin
Volume107
Issue number10
DOIs
StatePublished - Jan 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Geology

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