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 language | English (US) |
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Pages (from-to) | 1231-1240 |
Number of pages | 10 |
Journal | Geological Society of America Bulletin |
Volume | 107 |
Issue number | 10 |
DOIs | |
State | Published - 1995 |
Externally published | Yes |
ASJC Scopus subject areas
- Geology