RADIOMETRIC AGE OF MAFIC PARTS AND METAMORPHIC HOSTS OF SIKHOR AN ULTRAMAFIC-MAFIC COMPLEX, SOUTHEASTERN IRAN

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GHASEMI H.; SABZEHEI M.; JUTEAU T.; BELLOU H.; EMAMEI M.H.

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Journal: GEOSCIENCES Year:2004 | Volume:11 | Issue:51-52 Page(s): 58-67

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Title

RADIOMETRIC AGE OF MAFIC PARTS AND METAMORPHIC HOSTS OF SIKHOR AN ULTRAMAFIC-MAFIC COMPLEX, SOUTHEASTERN IRAN

Author(s)

Keywords

SIKHORANQ3

ULTRAMAFICQ4

MAFICQ4

-ANATECTICQ2

CARBONIFEROUSQ2

PERMIAN KUMULATEQ4

PEGMATOIDQ4

ISOTROPQ4

PHENGITEQ4

ASHINQ4

Abstract

SIKHORAN ULTRAMAFIC-Mafic Complex, in southeastern Iran, has intruded into the Palaeozoic metamorphic rocks and is overlainby Mesozoic colored melanges with fault boundary. The age of the complex and other similar complexes have Stratigraphically been supposed to be Palaeozoic. Detailed field and laboratory studies particularly, isotope geochemistry, not only revealed the age of different parts of the complex, but more significantly also showed its polygenetic nature.Radiometric age determinations by K-Ar method on minerals and whole rocks of different parts of the complex show 305±7 Ma for biotite of host Palaeozoic gneiss, 330±8 Ma for muscovite of anatectic granite intrusions in host Palaeozoic gneiss, 325±17Ma for amphibole of host Palaeozoic amphibolites (Middle-Late CARBONIFEROUS), 250-280 Ma for amphibole of gabbro-pegmatoid dykes cutting the ULTRAMAFIC-mafic cumulates (Permian), 184-220 Ma for amphibole and plagioclase of some gabbro-pegmatoid dykes and basic migmatites resulted form amphibolite anatexis in the contact of ISOTROPic gabbros with Paleozoic metamorphic rocks of host amphibolites (Middle-Late Triassic, the age of ISOTROPic gabbro emplacement),81. 160 Ma for whole rock samples of diabaslc dykes (Middle Jurassic-Upper Cretaceous) and finally 8l±2 Ma for phengitic muscovite of ASHIN colored melange mica schists.

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APA: Copy

GHASEMI, H., SABZEHEI, M., JUTEAU, T., BELLOU, H., & EMAMEI, M.H.. (2004). RADIOMETRIC AGE OF MAFIC PARTS AND METAMORPHIC HOSTS OF SIKHOR AN ULTRAMAFIC-MAFIC COMPLEX, SOUTHEASTERN IRAN. GEOSCIENCES, 11(51-52), 58-67. SID. https://sid.ir/paper/31961/en

Vancouver: Copy

GHASEMI H., SABZEHEI M., JUTEAU T., BELLOU H., EMAMEI M.H.. RADIOMETRIC AGE OF MAFIC PARTS AND METAMORPHIC HOSTS OF SIKHOR AN ULTRAMAFIC-MAFIC COMPLEX, SOUTHEASTERN IRAN. GEOSCIENCES[Internet]. 2004;11(51-52):58-67. Available from: https://sid.ir/paper/31961/en

IEEE: Copy

H. GHASEMI, M. SABZEHEI, T. JUTEAU, H. BELLOU, and M.H. EMAMEI, “RADIOMETRIC AGE OF MAFIC PARTS AND METAMORPHIC HOSTS OF SIKHOR AN ULTRAMAFIC-MAFIC COMPLEX, SOUTHEASTERN IRAN,” GEOSCIENCES, vol. 11, no. 51-52, pp. 58–67, 2004, [Online]. Available: https://sid.ir/paper/31961/en

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