The North Sistan orogen (Eastern Iran): Tectono-metamorphic evolution and significance within the Tethyan realm

Tectono‐Sedimentary Evolution of Shale‐Related Minibasins in the Karvandar Basin (South Sistan, SE Iran): Insights From Magnetostratigraphy, Isotopic Dating, and Sandstone Petrology

“…Taking into consideration a CCW rotation of the basin since the late Miocene, paleocurrents indicate an east‐northeast‐west‐southwest sediment transport, perpendicular to the Karvandar Fault (Figures 12a and 12b). The creation of new accommodation space in the foreland of the SSZ resulting in the formation of the Karvandar Basin is not trivial, as the continental sequence post‐dates SSZ collision for ∼10–15 Myr (Jentzer et al., 2022; Mohammadi, Burg, Bouilhol, & Ruh, 2016; Tirrul et al., 1983). One possible explanation for this delayed response is the reported post‐collisional westward‐propagating lithospheric delamination (Mohammadi, Burg, Bouilhol, & Ruh, 2016).…”

“…Biostratigraphy of radiolarites overlying the ophiolitic sequence and U‐Pb ages of ophiolite‐related leucogabbros indicate that the Sistan Ocean already existed in the Early Cretaceous (Babazadeh & De Wever, 2004; Zarrinkoub et al., 2012). Structural, petrological, and sedimentological studies suggest that the Sistan Ocean was subducting eastward beneath the Afghan/Helmand Block during Late Cretaceous (Angiboust et al., 2013; Bröcker et al., 2013; Jentzer et al., 2022; Mohammadi, Burg, Bouilhol, & Ruh, 2016; Mohammadi, Burg, et al., 2023). However, some studies interpret subduction vergence to be westward or double‐sided, based on geochemical analyses of magmatic rocks from the Lut Block (e.g., Arjmandzadeh et al., 2011; Beydokhti et al., 2015; Pang et al., 2013).…”