Introducing Ordovician plutonism as a result of Caledonian orogeny from North East of Iran | Zendy

Fereshteh Ranjbar | Zendy; Fariborz Masoudi | Zendy; Seyed Masoud Homam | Zendy; Fernando Kerfo | Zendy; Mohajel Mohammad | Zendy

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Introducing Ordovician plutonism as a result of Caledonian orogeny from North East of Iran

Author(s) -

Fereshteh Ranjbar,

Fariborz Masoudi,

Seyed Masoud Homam,

Fernando Kerfo,

Mohajel Mohammad

Publication year - 2018

Publication title -

iranian journal of crystallography and mineralogy

Language(s) - English

Resource type - Journals

eISSN - 2588-4719

pISSN - 1726-3689

DOI - 10.29252/ijcm.25.4.871

Subject(s) - plutonism , orogeny , ordovician , geology , paleontology , geochemistry , chemistry , structural basin , tectonics , volcanism

Gabbroic intrusions are located about 40 Km southeast of Fariman in Central Iran zone along the FarimanTorbatjam road that could be seen at the end of Bardoo river and in Chahak village. Previous studies have emphasis on the age and genesis relationship between granites and gabbroic rocks. So in order to investigate this matter, granites and gabbroes dated by using U-Pb method in Oslo University. Granites show the age of 548.3 Ma that is concarrent with the formation of schists during high temperature metamorphism in Fariman area. Dating of gabbroic rocks suggest an age of 471.14 ±0.85 mainly Early Paleozoic age that is younger than magmatism formed granites. Introducing Ordovician plotunism in this area is very important for reconstruction of Caledonian event. It seems that the formation of Gobbroic rocks is as a result of a short orogeny event due to opening of paleotethys during ordovician and Silurian.

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