Slab extension and normal faulting in a low-angle subduction-related environment: An example of the Makran subduction zone (Iran-Pakistan)

Mousavi, Naeim; Ardestani, Vahid E.; Moosavi, Nastaran

doi:10.1016/j.jseaes.2022.105244

Cited by 6 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Makran accretionary wedge in southeastern Iran and southwestern Pakistan is an active arc system where the oceanic portion of the Arabian plate is subducted northward (hereafter Makran subduction) (Mousavi et al., 2022). The earliest stage of intraoceanic subduction of the Neotethyan Ocean led to upwelling of the asthenosphere, leaving Mesozoic lavas near Makran ophiolites (Figure 13) (Monsef et al., 2018), and Paleogene and Oligocene–Miocene volcanism migrated farther northeast (e.g., Pang et al., 2014).…”

Section: Discussionmentioning

confidence: 99%

“…The Makran arc volcanism reflects the low-angle (∼1-2 Simmons et al, 2011). Mousavi et al (2022) suggested that the Bazman, Taftan and Kuh-Sultan slabs represent different phases of Makran subduction prior to, simultaneous with and following slab break-off, respectively. However, the deep structure related to slab detachment has not been observed beneath the Makran region.…”

Section: Makran Magmatic Beltmentioning

confidence: 99%

“…The formation of the Makran magmatic belt and the surrounding Bazman, Taftan, and Koh‐e‐Nadir volcanoes (Figure 1b) resulted from low‐angle or flat‐slab subduction of the Arabian plate (Oman Sea) (Abedi & Bahroudi, 2016; Regard et al., 2010; Yamini‐Fard et al., 2007). Across the W‒E Makran subduction zone, the slab descends into the mantle at different distances and dipping angles from the trench and further affects the distribution of surface volcanism (e.g., Motaghi et al., 2020; Mousavi et al., 2022). However, the magmatic accumulation pattern in the crust and mantle is not well documented.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Crustal Lg Attenuation Beneath the Iranian Plateau: Implications for Cenozoic Magmatism Related to Slab Subduction, Slab Break‐Off, and Mantle Flow

et al. 2023

View full text Add to dashboard Cite

Cenozoic magmatism is present across the Iranian Plateau but, despite playing an important role in the geodynamic evolution of the young plateau, remains poorly understood. In this study, the crustal thermal structure beneath the Iranian Plateau is investigated by high‐resolution Lg‐wave attenuation tomography using a newly compiled data set, which consists of records from three recent temporary seismic arrays (for a total of 197 stations) and previous regional networks. Strong Lg attenuation is mainly observed beneath the Zagros orogenic belt, Urumieh‐Dokhtar magmatic arc (UDMA), Makran magmatic arc, Lut magmatic zone, and Alborz reararc magmatic belt, which covers not only tectonic boundary belts but also the active internal zones of the Iranian Plateau. Combining deep seismological observations and geochemical data, the strong crustal attenuation characteristics beneath the northwestern and southeastern UDMA suggest that Miocene–Quaternary magmatism was activated by slab detachment‐induced upwelling after the cessation of oceanic subduction. Western Makran is characterized by strong Lg attenuation with a NE trend. The age of the Paleogene–Quaternary Makran volcanism decreases toward the NE and is likely related to the change in subduction dip. Diffuse magmatism and strong crustal attenuation are present in the northern Lut Block rather than the entire Lut–Afghan collision zone, which is likely associated with the accumulation of mantle magmas driven by the potential northward asthenospheric flow. In northern Iran, a strong attenuation anomaly spans the entire E‒W Alborz magma belt, suggesting that partial crustal melting and mantle thermal sources may exist in this region.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Makran Magmatic Beltmentioning

confidence: 99%