Coexistence of two types of Late Paleocene adakitic granitoid, Soursat complex, NW Iran

Late Neoproterozoic basement of the Soursat complex to the southeast of Shahin-Dej, NW Iran, spans an area wider than 100 km2 and is cut by Paleogene monzonite and granodiorite bodies. Zircon U-Pb dating yields monzonite and granodiorite crystallization ages of 54.7 ± 3.8 Ma and 57.7 ± 2.9 Ma, respe...

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Bibliographic Details
Published in:Lithos 2021-12, Vol.404-405, p.106438, Article 106438
Main Authors: Nouri, Fatemeh, Azizi, Hossein, Asahara, Yoshihiro, Whattam, Scott A., Tsuboi, Motohiro, Mohammad, Yousif Osman, Minami, Masayo, Anma, Ryo
Format: Article
Language:English
Subjects:
High-silica adakite
Late Paleocene
Low-silica adakite
Northwest Iran
Sanandaj Sirjan Zone
Soursat complex
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Summary:Late Neoproterozoic basement of the Soursat complex to the southeast of Shahin-Dej, NW Iran, spans an area wider than 100 km2 and is cut by Paleogene monzonite and granodiorite bodies. Zircon U-Pb dating yields monzonite and granodiorite crystallization ages of 54.7 ± 3.8 Ma and 57.7 ± 2.9 Ma, respectively. The monzonite group has relatively high MgO (2.40–7.01 wt%), Cr (37.5–233 ppm) and Ni (30.6–177 ppm), and high Sr/Y (103−132) and La/Yb (68.0–102) similar to low silica-adakites (LSA). The granodiorite group has low MgO (
ISSN:0024-4937
1872-6143
DOI:10.1016/j.lithos.2021.106438