Petrology and origin of the Lar igneous complex of the Sistan suture zone, Iran

• Autorzy: Boomeri Mohammad , Moradi Rahele , Bagheri Sasan

Identyfikatory

DOI

10.2478/logos-2020-0004

• Języki publikacji: EN

Abstrakty

EN

The Oligocene Lar igneous complex is located in the Sistan suture zone of Iran, being emplaced in Paleocene to Eocene flysch-type rocks. This complex includes mainly intermediate K-rich volcanic (trachyte, latite and andesite) and plutonic (syenite and monzonite) rocks that belong to shoshonitic magma. The geochemical characteristics of the Lar igneous complex, such as an enrichment of LREE and LILE relative to HREE and HFSE, respectively, a negative anomaly of Ti, Ba and Nb and a positive anomaly of Rb and Th are similar to those of arc-type igneous rocks. Tectonic discrimination diagrams also show that rocks of the Lar igneous complex fall within the arc-related and post-collisional fields and K-enrichment of these rocks confirm the post-collisional setting. Based on geochemical features, the Lar igneous complex magma was derived from partial melting of a phlogopite-bearing, enriched and metasomatised lithospheric mantle source and the magma was affected by some evolutionary processes like fractional crystallisation and crustal contamination.

Słowa kluczowe

EN

post-collisional setting; shoshonitic magmatism; rock properties; Middle East

PL

magmatyzm; właściwości skał; Bliski Wschód

• Wydawca: Uniwersytet im. Adama Mickiewicza. Instytut Geologii
• Czasopismo: Geologos
• Rocznik: 2020
• Tom: Vol. 26, No. 1
• Strony: 51--64
• Opis fizyczny: Bibliogr. 70 poz.

Twórcy

autor

Boomeri Mohammad

• Department of Geology, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran

autor

Moradi Rahele

• Department of Geology, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran

autor

Bagheri Sasan

• Department of Geology, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).