Provenance analysis for the Oligocene-Early Miocene Cienaga de Oro Formation at a stratigraphic section between Monteria and Planeta Rica

Abstract

We study a stratigraphic section in the San Jacinto fold and thrust belt located between Monteria and Planeta Rica towns. This section displays part of the Oligocene-Early Miocene Ciénaga de Oro Formation (COF). This work analyses the sediments provenance by using a multi-tool approach throughout: (I) conglomerate and sandstone counting clast with mesh, (II) heavy minerals analysis, and (III) paleocurrent analysis. Our results suggest a deltaic to transitional environment deposition, as it has been proposed by previous authors. Two main sources have been identified from a dissected arc province: a granitic to pegmatitic main source and a basic igneous secondary source rock, located to the east and southwest of the current position. Therefore, we propose the Central Cordillera as the main source area to the COF.