The NE Natanz (Badroud) intrusive bodies, outcropping in the Mahur–Chah-Kaleh elevations (120 km SE of Kashan, NE Badroud, Isfahan Province; 52∘15′–52∘30′ E and 33∘52′–34∘00′ N), are emplaced within Eocene volcanic sequences in the central Urumieh–Dokhtar Magmatic Belt (UDMB). The intrusive complex predominantly comprises granite, granodiorite, syenite, and syenodiorite. Geochemically, these rocks exhibit high-K calc-alkaline affinities, dominant metaluminous to borderline peraluminous signatures, and characteristic I-type granitoid features. On normalized multi-element diagrams, pronounced enrichments in large-ion lithophile elements (LILEs) and light rare earth elements (LREEs), coupled with prominent negative high-field-strength element (HFSE) anomalies (notably Nb, Ta, and Ti), demonstrate the significant role of subduction-related metasomatism in the source region. Elevated La/Sm and Sm/Yb ratios reflect derivation from an enriched lithospheric mantle (EM) source. Variations in trace-element systematics (e.g., Zr–Y) are attributed to post-melting processes and accessory phase fractionation (zircon and apatite), entirely consistent with the source characteristics. Geochemical trends delineate two distinct evolutionary paths: (1) granitoids generated via fractional crystallization of arc calc-alkaline magmas dominated by plagioclase and amphibole fractionation; and (2) syenitic–syenodioritic suites derived from low-degree partial melting of a metasomatized mantle with intra-suite differentiation coupled with minor crustal contamination at shallow emplacement levels. Overall, this intrusive assemblage records a transitional continental arc to post-collisional tectonic setting related to the Neo-Tethyan subduction system during the Eocene.
Farrahi Ashtiani, M. , Arian, M. A. , Ashja Ardalan, A. and Salavati, M. (2026). Petrogenesis, Geochemistry and Tectonomagmatic Setting of the Intrusive Rocks in the Northeast (Badroud) of Natanz (Urumieh-Dokhtar Magmatic Belt).. Petrological Journal, (), -. doi: 10.22108/ijp.2026.150312.1401
MLA
Farrahi Ashtiani, M. , , Arian, M. A. , , Ashja Ardalan, A. , and Salavati, M. . "Petrogenesis, Geochemistry and Tectonomagmatic Setting of the Intrusive Rocks in the Northeast (Badroud) of Natanz (Urumieh-Dokhtar Magmatic Belt).", Petrological Journal, , , 2026, -. doi: 10.22108/ijp.2026.150312.1401
HARVARD
Farrahi Ashtiani, M., Arian, M. A., Ashja Ardalan, A., Salavati, M. (2026). 'Petrogenesis, Geochemistry and Tectonomagmatic Setting of the Intrusive Rocks in the Northeast (Badroud) of Natanz (Urumieh-Dokhtar Magmatic Belt).', Petrological Journal, (), pp. -. doi: 10.22108/ijp.2026.150312.1401
CHICAGO
M. Farrahi Ashtiani , M. A. Arian , A. Ashja Ardalan and M. Salavati, "Petrogenesis, Geochemistry and Tectonomagmatic Setting of the Intrusive Rocks in the Northeast (Badroud) of Natanz (Urumieh-Dokhtar Magmatic Belt).," Petrological Journal, (2026): -, doi: 10.22108/ijp.2026.150312.1401
VANCOUVER
Farrahi Ashtiani, M., Arian, M. A., Ashja Ardalan, A., Salavati, M. Petrogenesis, Geochemistry and Tectonomagmatic Setting of the Intrusive Rocks in the Northeast (Badroud) of Natanz (Urumieh-Dokhtar Magmatic Belt).. Petrological Journal, 2026; (): -. doi: 10.22108/ijp.2026.150312.1401
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