List of Articles ماگماتیسم درون صفحه¬ای.

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Isotopic geochemistry of Rb-Sr, Sm-Nd and 40Ar-39Ar dating of Ghoshchi gabbros, north of Uromiyeh, northwest of Iran
  Sh. Shahabi Hadi Shafaii Moghadam Ghasem Ghorbani
  The studied Ghoshchi complex gabbros are located in the north of Uromiyeh city and NW of Central Iran structural zone. These rocks are intruded into the Cadomian basement, and late diabasic, granitic and aplitic dikes crosscut these gabbros. Clinopyroxene and plagioclas More

  The studied Ghoshchi complex gabbros are located in the north of Uromiyeh city and NW of Central Iran structural zone. These rocks are intruded into the Cadomian basement, and late diabasic, granitic and aplitic dikes crosscut these gabbros. Clinopyroxene and plagioclase are the main minerals of the gabbros. These rocks are characterized by relatively low 87Sr/86Sr (0.703280-0.704343) ratios. Their isotopic signatures indicate a within plate environment for the formation of gabbros and derivation from an enriched mantle source. 40Ar-39Ar dating shows 316.55±1.68 Ma (Carboniferous period) as minimum age and are related to almost early phases of Neotethys opening. The Ghoshchi gabbros are originated more likely from a spinel-garnet lherzolitic mantle source with about 5% partial melting. Manuscript profile