Silurian deltaic progradation, Tassili n’Ajjer plateau, south-eastern Algeria: Sedimentology, ichnology and sequence stratigraphy

The Silurian red beds of Tarim Basin: Signals of palaeoenvironment, palaeoclimate, and sea‐level change

“…This makes it possible to reveal the sea‐level fluctuation by geochemical means, such as Sr/Ba, δ 13 C, δ 18 O, and constant elements. Previous studies have demonstrated that the sea level changed significantly during the Silurian period (Calner & Säll, ; Cramer & Saltzman, ; Djouder et al, ; M. E. Johnson, Baarli, Nestor, Rubel, & Worsley,, & D., ; Lehnert et al, ; Munnecke et al, ; X. Zhang, Liu, Wang, et al, ; Žigaitė, Joachimski, Lehnert, & Brazauskas, ). But the relationship between sea‐level change and stable isotope geo‐chemistry is still poorly understood, especially the relationship between isotope excursions and extinction events (Munnecke et al, ).…”

“…Glacial events and climatic shifts (e.g., humid or arid) are generally regarded to be responsible for the oceanic circulation (Ainsaar et al, 2010;Azmy et al, 1999;Brand et al, 2006;Kaljo, Hints, Martma, & Nõlvak, 2001;Kaljo, Kiipli, & Martma, 1997;Melchin et al, 2013;Munnecke et al, 2010). On the one hand, the storage or melting of ice at the polar regions within a rel- (Calner & Säll, 1999;Cramer & Saltzman, 2007;Djouder et al, 2018;M. E. Johnson, Baarli, Nestor, Rubel, & Worsley,, & D., 1991;Lehnert et al, 2007;Munnecke et al, 2010;X.…”

“…The tectonic upheavals of the Late Ordovician impacted many basins globally. The Silurian brought fundamental changes, such as a global sea‐level change (Brand, Azmy, & Veizer, ; Djouder, Lüning, Da Silva, Abdallah, & Boulvain, ; Heron, Khoukhi, Paris, Ghienne, & Herissé, ), changes of the sedimentary system (Antoshkina, ; J. Rong et al, ; Yin, Dang, Zhang, Chen, & Mcrivette, ), and glacial events (Heron et al, ; Khader & Novakowski, ). This leads to a widespread biological extinction and catastrophic events in many basins of the world (Fan et al, ; Gelsthorpe, ; Luo et al, ; G. Wang, Zhan, & Percival, ).…”

Diagenesis- and thermal maturity-evolution of the Silurian unconventional hydrocarbon deposits (Tassili n’Ajjer plateau, Algeria): Clay mineralogy, graptolite reflectance, and K–Ar dating

“…1A): the Tindouf, Bechar, Reggane, Sbaa, Timimoun, Ahnet, Mouydir, Oued Mya, Berkine -Ghadames and Illizi petroliferous basins (Beuf et al, 1971;Boote et al, 1998). Exceptionally, Paleozoic sediments of the latter basins outcrop in south-eastern Algeria within the Tassili n'Ajjer plateau and are laterally traceable over kilometers (Fekirine and Abdallah, 1998;Djouder et al, 2018).…”

“…Although previous studies have shed light on trace fossil analysis, as well as the sedimentological and sequential framework of the Silurian succession (e.g. Beuf et al, 1971;Bekkouche, 1992;Fekirine and Abdallah, 1998;Lüning et al, 2000;Eschard et al, 2005;Galeazzi et al, 2010;Djouder et al, 2018;Djouder, 2019), some important information on the thermal history in numerous Saharan basins remains poorly understood and still not yet available for natural resources exploration. History of large-scale tectonic and thermal events within the Berkine -Ghadames and Illizi "BGI" basins not only controls directly the distribution of maturation of source rocks but also hydrocarbon generation in time-space, therefore, helping better determination of potential locations for drilling hydrocarbon wells, thus rising confidence in efficient petroleum exploration and development programs.…”