Synorogenic foreland rifts and transtensional basins: A review of Andean imprints on the evolution of the San Jorge Gulf, Salta Group and Taubaté Basins

Whole‐rock geochemistry and zircon Hf isotope of Late Carboniferous–Triassic sediments in the Bogda region, NW China: Clues for provenance and tectonic setting

“…Considering the above phenomena, we suggest that the Bogda region was a rift basin, which is similar to the modern Rhine Graben where extension strike orthogonally or at high angles to the associated orogenic belt (Gianni, Navarrete, Folguera, ; Gianni, Navarrete, Orts, et al, ; D. Li et al, ). The dynamic processes of such rift basin maybe similar to the alleged synorogenic foreland rifts, transtensional basins, or impactogens, which possibly formed by the “continental escape” (Gianni, Navarrete, Folguera, ; Gianni, Navarrete, Orts, et al, ; Sengör, ; Sengör et al, ; Sengör & Natal'in, ). Alternatively, the extensional tectonics could relate to strike‐slip component caused by the sinistral shear zone (Allen, Sengör, & Natal'in, ).…”

“…The most common convergent‐related rift is the back‐arc basin, which is thought to evolve in response to slab roll‐back or detachment (Merle, , and references therein). A less common but lengthily acknowledged process is that collisional processes may also lead to rifting, these rifts always oriented at a high angle to the continental margin (Gianni, Navarrete, & Folguera, ; Gianni, Navarrete, Orts, et al, ; Sengör, ; Sengör, Burke, & Dewey, ; Sengör & Natal'in, ). Although the back‐arc rifting model could explain the formation of the bimodal volcanic suites (X. J. Chen et al, ; Y. Y. Zhang et al, ), palaeogeographic research revealed that the orientation of the Bogda region was roughly perpendicular to the Tianshan and/or East Junggar orogens in the late Palaeozoic (Figure ; D. Li, He, & Tang, ).…”

(Un)Coupled thrust belt‐foreland deformation in the northern Patagonian Andes: New insights from the Esquel‐Gastre sector (41°30′–43°S)

“…Synsedimentary normal faults and hydrothermal veins, also controlling the mineralization in the Navidad ore deposit, provide a structural record of such Mesozoic extension in the study area (refer to Figures and ). Subsequent shortening of this foreland sector has been widely documented [e.g., Folguera and Ramos , ; Bilmes et al ., ; Gianni et al ., ; Echaurren et al ., ] and has resulted in the folds affecting the succession of the Cañadón Asfalto Basin analyzed in this study (refer to the section on structural data). The new AHe ages obtained in this study, being consistently younger than stratigraphic age of the sampled units (Tables and ), provide evidence for burial conditions sufficient to completely reset the AHe system that is in the range of 2.5–3.5 km (see below).…”

“…Had such folding occurred during the Miocene, the removal of the overlying burial would be recorded by recent (i.e., Miocene or younger) AHe ages. Yet AHe ages obtained in this study point to a Late Cretaceous to Paleogene major tectonic inversion and exhumation stage, in agreement with a regional shortening stage that has been documented for the whole Patagonian Andes and its foreland, which lasted from circa 125 Ma to circa 56 Ma at the latitudes of this study [ Gianni et al ., ]. The plate‐scale extent of this major shortening stage is testified by fault reactivation and mild inversion occurring in Cretaceous times over various parts of the foreland area, as far as the Atlantic offshore [ Continanzia et al ., ; Micucci et al ., ].…”

“…The reduced role of Miocene inversion is in good agreement with a recent study by Gianni et al . [], who suggested that the latest stages of Andean deformation and broken foreland reactivation during the Neogene (19.0–14.8 Ma) proposed by Bilmes et al . [] may have not been as strong as the Cretaceous‐Paleogene event.…”