K/Ar mineral geochronology of the northern part of the Sithonia Plutonic Complex (Chalkidiki, Greece)

Implications for its thermal history and geodynamic interpretation

Kyriaki Pipera, Antonis Koroneos, Triantafyllos Soldatos, Zoltán Pécskay, Georgios Christofides

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

New K/Ar mineral ages of thirty nine samples (biotite, muscovite, K-feldspar) from the two-mica granodiorite to granite and leucogranite of the northern part of the Sithonia Plutonic Complex (Chalkidiki, Greece) are given in the present study. These data along with existing Rb/Sr mica and U/Pb zircon ages are used to investigate the thermal history of the plutonic complex and shed light on the process that affected it, and caused discordant Rb/Sr and K/Ar mineral ages. The K/Ar mineral dating yielded ages ranging from 38 to 49 Ma for muscovites, 32 to 47 Ma for biotites and 37 to 43 Ma for K-feldspars, respectively. The comparison of the K/Ar, Rb/Sr and U/Pb mineral ages and the closure temperatures of the different isotopic systems for the different minerals indicate a rapid cooling rate for the Sithonia pluton. The latter supports the hypothesis that the pluton was formed in a post orogenic extensional regime. Moreover, the K/Ar mineral isochrones indicate that a reheating of the pluton took place before 37 Ma and partially rejuvenated the K/Ar and Rb/Sr isotopic system of the minerals.

Original languageEnglish
Pages (from-to)133-140
Number of pages8
JournalGeologica Carpathica
Volume64
Issue number2
DOIs
Publication statusPublished - Apr 2013

Fingerprint

geochronology
geodynamics
mineral
history
pluton
muscovite
mica
closure temperature
leucogranite
granodiorite
feldspar
biotite
zircon
granite
cooling

Keywords

  • K/Ar geochronology
  • Sithonia plutonic complex
  • Tertiary granitoids of Rhodope
  • Thermal evolution

ASJC Scopus subject areas

  • Geology

Cite this

K/Ar mineral geochronology of the northern part of the Sithonia Plutonic Complex (Chalkidiki, Greece) : Implications for its thermal history and geodynamic interpretation. / Pipera, Kyriaki; Koroneos, Antonis; Soldatos, Triantafyllos; Pécskay, Zoltán; Christofides, Georgios.

In: Geologica Carpathica, Vol. 64, No. 2, 04.2013, p. 133-140.

Research output: Contribution to journalArticle

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