Deep-seated fluid involvement in ductile-brittle deformation and mineralization, South Mountains metamorphic core complex, Arizona

B. M. Smith, Stephen Reynolds, H. W. Day, R. J. Bodnar

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

In the South Mountains metamorphic core complex of central Arizona, a middle Tertiary pluton exhibits the entire spectrum of ductile-to-brittle structures characteristic of metamorphic core complexes. Apart from minor Cu-enrichments in brecciated samples, original major- and minor-element abundances of the deformed igneous rocks are remarkably undisturbed, and there is little correspondence between chemical composition and deformational state. Fluids present during the entire history of ductile-to-brittle deformation were apparently close to chemical and oxygen-hydrogen-isotope equilibrium with the rocks. The temporal association of deformation with Tertiary plutonism and the evidence for high-temperature fluid/rock near-equilibrium support the interpretation that the fluids were expelled from differentiated, late crystallizing portions of the South Mountains plutonic complex. -from Authors

Original languageEnglish (US)
Pages (from-to)559-569
Number of pages11
JournalGeological Society of America Bulletin
Volume103
Issue number4
DOIs
StatePublished - 1991
Externally publishedYes

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brittle deformation
ductile deformation
mineralization
mountain
fluid
plutonism
hydrogen isotope
rock
igneous rock
pluton
oxygen isotope
chemical composition
history

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Deep-seated fluid involvement in ductile-brittle deformation and mineralization, South Mountains metamorphic core complex, Arizona. / Smith, B. M.; Reynolds, Stephen; Day, H. W.; Bodnar, R. J.

In: Geological Society of America Bulletin, Vol. 103, No. 4, 1991, p. 559-569.

Research output: Contribution to journalArticle

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