Linking diagenesis to sequence stratigraphy in fluvial and shallow marine sandstones: Evidence from the Cambrian–Ordovician lower sandstone unit in southwestern Sinai, Egypt

Experimental nucleation and growth of smectite and chlorite coatings on clean feldspar and quartz grain surfaces

“…Linking diagenesis with sedimentology and other disciplines is still at an immature stage. This integrated approach is however getting increased attention (Al-Ramadan et al, 2005;De Ros et al, 2012;Hiatt and Kyser, 2000;Ketzer et al, 2003;Kordi et al, 2011;Mansurbeg, 2017;McKay et al, 1995;Morad et al, 2010). The primary research objectives were to:…”

Extensive carbonate cementation of fluvial sandstones: An integrated outcrop and petrographic analysis from the Upper Cretaceous, Book Cliffs, Utah

“…Furthermore, the field-and basin-scale patterns of carbonate cementation have been elucidated within many marine successions, and this has resulted in an understanding of the sedimentological and stratigraphic controls on the distribution of cementation (e.g., Prosser et al, 1993;Morad, 1998;Al-Ramadan et al, 2005;Machent et al, 2007;Taylor and Machent, 2010). Extensive carbonate cementation has also been previously reported from fluvial strata (e.g., Mozley and Davis, 1996;Milliken, 1998;Salem et al, 2000;Rossi et al, 2002;McBride and Milliken, 2006;Cavazza et al, 2009;Khidir and Catuneanu, 2010), but there is less of an understanding of the stratigraphic and sedimentological controls on its large-scale distribution (but see El-Ghali et al, 2009;Kordi et al, 2011). Fluvial strata commonly act as important hydrocarbon reservoirs, as well as groundwater aquifers.…”

How important is carbonate dissolution in buried sandstones: evidences from petrography, porosity, experiments, and geochemical calculations

“…Instead, most intergranular pores without carbonate cements were interpreted as secondary pores formed by the dissolution of carbonate cements (Taylor et al 2010). Based on the CO 2 /organic acids leaching hypothesis, and the negative relationship between porosity and the amount of carbonate cements in reservoirs, extensive burial dissolution of carbonate minerals has also been suggested by many other authors in the last few decades (Dutton and Willis 1998;Gibling et al 2000;Harris and Bustin 2000;Higgs et al 2010;Irwin and Hurst 1983;Khidir and Catuneanu 2010;Kordi et al 2011;Mcbride 1988;Shanmugam 1984;Wilkinson et al 1997). Similar to Schmidt and McDonald (1979a, b), no convincing petrography evidence on carbonate dissolution was provided in these publications.…”

“…These reappraisals showed that burial-induced carbonate dissolution in sandstones and carbonates is commonly insignificant. This conclusion is not new (Ehrenberg et al 2012); however, the retrospective nature of these new presentations is striking because the subjective idea that up to 20% secondary porosity can be formed by burial dissolution of minerals still persists in some very recent publications (Khidir and Catuneanu 2010;Kordi et al 2011) and textbooks (Boggs 2011 a-Porosity evolution models proposed by Schmidt and McDonald (1979) b-Modified from Giles (1987) Primary pores Secondary pores Quartz grains…”

“…1a). Based on petrographic identification and interpretation, this idea has been prominent in the literature on sandstone diagenesis for about 40 years (Bjørlykke and Jahren 2012;Boggs 2011;Burley 1986;Dutton and Willis 1998;Higgs et al 2010;Khidir and Catuneanu 2010;Kordi et al 2011;Schmidt and McDonald 1979a;Shanmugam 1984;Xi et al 2016;Wilkinson et al 1997;Yuan et al 2015a, b, c). At the same time, however, the advent of the deep burial dissolution proposals has caused intense debates (Fig.…”