Sedimentology and stratigraphy of a deltaic deposit generated by physical modelling from core samples

Abstract

In natural ambient, the analysis of deposit cores is a method widely used in sedimentological and stratigraphic studies. It is proposed in this paper, a new method to sample sedimentary deposits generated by physical modeling in small scale. This method was adapted in order to extract additional details and information in terms of geological point of view of the deposit generated. At the lab, the sampling process, consisted in a vertical hole on the deposit and removal sedimentary material, and then, filling the hole with resin. The resin penetrates horizontally a few inches in the sedimentary layers along all vertical cores and, after impregnation, allows the removal of a well preserved core. A total of 33 cores was collected and described , producing vertical profiles of facies which are then interpreted and correlated by using the models and concepts of sedimentology and sequence stratigraphy. Similar geometries and sedimentary features related to natural deltas were observed . It was also possible evaluate the deltaic facies associations and established a longitudinal section of the deposit in order to understand its stratigraphic evolution.