Petrography and geochemistry of the Neogene continental redbeds in the Eshtehard area, Alborz Province, Iran: insights into tectonic setting, provenance and paleoclimate

Geochemistry and Sr, S, and O stable isotopes of Miocene Abu Dhabi evaporites, United Arab Emirates

“…Conversely, the co-precipitated elements explain the great variability; Fe 2 O 3 and TiO 2 are present in nonsignificant proportions, indicating Fe/Ti oxide impurities. Because Fe and Ti are hydrolysate elements, they accumulate in fine-grained sediments [ 47 ]. In addition, the SiO 2 and Al 2 O 3 contents were relatively low, indicating a small influx of terrigenous (detrital) materials into the basin of deposition.…”

“…Brine concentration fulfills a significant role versus Na + , K + , Mg 2+ , and Mn 2+ co-precipitation or incorporation in gypsum under various depositional environments [ 6 , 17 , 47 ]. The exceptionally low concentration of co-precipitated Na and K in the investigated evaporite deposits suggests that the brine fluids that precipitate this gypsum deposit under equilibrium conditions have comparatively low salinities.…”