The role of elemental chemistry to discriminate diagenesis trend in sedimentary rocks study (original) (raw)

Carbon and oxygen isotopes are very helpful in getting to know sedimentary environment temperature, digenetic temperature and diagenesis trends in diagenetic environments [1, 2]. This study has used trace elements (Sr, Mn, Na, Mg, Ca, Fe) and isotopic (δ 18 O and δ 13 C) analyses to determine diagenetic trend of Aptian limestones which are called Dariyan Formation located in Fars area that is placed at the south west of Iran. Binary plots of trace elements and δ 18 O and δ 13 C values demonstrate that original carbonate mineralogy of Dariyan limestones was aragonite. Elemental and isotopic studies illustrate that these carbonates affected by non marine (burial) diagenesis in a closed to semi-closed system. Furthermore, paleotemperature calculation based on oxygen isotope indicates that very early shallow burial temperature was around 28.5°C. Figure 1: δ 18 O and δ 13 C cross-plot Samples are placed into Cretaceous marine Lms Field.