Late Cretaceous and early Miocene Andean-type plutonic activity in northern Makran and Central Iran

Abstract
Two calc-alkaline plutonic complexes. Bazman and Natanz, intruded through the south-eastern active and south-western ancient continental margins of Central Iran, Have been dated by the Rb-Sr whole-rock isochron method at 74 ± 2 and 24 ± 4.5 Ma, respectively. Detailed trace element studies together with low 87 Sr/ 86 Sr initial ratios (87 Sr/ 86 Sr ratios and the gabbros, at least, were intruded some 10 Ma earlier.