Petrogenesis and geodynamic evolution of the Kajan Neogene subvolcanic rocks, Nain, Central Iran

Geochemical and isotopic evidence for magma mixing/mingling in the Marshenan intrusion: Implications for juvenile crust in the Urumieh–Dokhtar Magmatic Arc, Central Iran

“…In comparison with the intrusive equivalents from the UDMA, the Sr–Nd composition of the studied rocks is nearly similar to that from a Late Eocene–Oligocene to Middle–Late Miocene Kerman intrusions (Shafiei, Haschke, & Shahabpour, ); Late Oligocene Zafarghand intrusion (Sarjoughian et al, ); Late Miocene–Pliocene Kajan intrusion (Golkaram et al, ); and Late Eocene Khalkhab–Neshveh intrusions (Rezaei‐Kahkhaei, Galindo, Pankhurst, & Esmaeily, ). However, the Khalkhab–Neshveh (Rezaei‐Kahkhaei et al, ) and Kajan (Golkaram et al, ) intrusions have a slightly lower 87 Sr/ 86 Sr (i) value and higher εNd (T) (Figure a).…”

“…In comparison with the intrusive equivalents from the UDMA, (Golkaram et al, 2016) intrusions have a slightly lower 87 Sr/ 86 Sr (i) value and higher εNd (T) (Figure 6a).…”

Role of magma mixing in generating of the Gheshlagh–Aftabrow intrusions, SW Buin Zahra, Iran: Evidence for a juvenile origin from geochemical and Sr–Nd isotopic data

“…The Nd model ages for rocks are acceptable with a limited range of Sm/Nd fractionation, expressed as the ƒSm/Nd value to the range of −0.2 to −0.6 (Wu, Jahn, Wilde, & Sun, ; Wu et al, ; Table ; Figure a). All of these rocks have Nd–Sr isotope compositions that differ from those of the Natanz (Haschke, Ahmadian, Murata, & McDonald, ) and Kuh‐e Dom (Kananian et al, ; Sarjoughian et al, ) granitoids and plotted near data for the North Saveh (Rezaei‐Kahkhaei et al, ) and Kajan (Golkaram et al, ) granitoids. Compared with the other granitoids, GAG shows homogeneous Sr–Nd isotopic compositions (Figure a).…”

“…The Nd isotope model ages (T DM1 ) of these samples are between 782 and 983 Ma (Table ), suggesting that they generated by re‐melting of Neoproterozoic crust with input of mantle material. In the Sr–Nd isotopic diagram (Figure a), the GAG samples plot near data for North Saveh (Rezaei‐Kahkhaei et al ., ) and Kajan (Golkaram et al, ) granitoids and plot along mixing curves between mantle and lower crust, but far away from the data for the upper continental crust (UCC). In summary, it is likely that the granodioritic rocks and associated MMEs formed by magma mixing between a juvenile lower crust with variable amounts of old lower crust, involving mantle components.…”

Juvenile crust and mantle sources for the Nasrand intrusive rocks, the central Urumieh–Dokhtar magmatic arc, Iran: Insights from elemental and isotopic geochemistry

“…Other intrusive rocks in UDMA that have been compared with the other area include: North‐west of UDMA (NW): (1) Haji Abad granitoids from Kazemi, Kananian, Xiao, and Sarjoughian (2019); (2) Gheshlaghe‐Aftabrow intrusions from Kazemi, Kananian, Xiao, and Sarjoughian (2020); (3) Saveh magmatic complex from Nouri et al (2018). Center of UDMA: (4) Niyasar plutonic complex from Honarmand et al (2014); (5) Kuh‐e Dom granitoids from Kananian, Sarjoughian, Nadimi, Ahmadian, and Ling (2014); (6) Kajan subvolcanic rocks from Golkaram et al (2016); (7) Zafarghand complex from Sarjoughian, Lentz, Kananian, Ao, and Xiao (2018); (8) Marshenan granitoids from Sarjoughian, Azizi, Lentz, and Ling (2019); (9) Soheyle‐PaKuh granitoids from Sarjoughian et al (2020); (10) Nadoushan granitoids from Shahsavari Alavijeh, Rashidnejad‐Omran, Toksoy‐Koksal, Xu, and Ghalamghash (2019). Southeast of UDMA (SE): (11) KuhPanj porphyries from Asadi, Moore, and Zarasvandi (2014) and Asadi (2018); (12 and 13) Bezenjan‐Bardsir complex from Sepidbar, Ao, Palin, Li, and Zhang (2019); (14 and 15) Rabor‐Lalehzar from Chekani Moghadam, Tahmasbi, Ahmadi‐Khalaji, and Santos (2018) and (16) Sarduiyeh granitoids from Nazarinia et al (2018)…”