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Depositional and provenance record of the Paleogene transition from foreland to hinterland basin evolution during Andean orogenesis, northern Middle Magdalena Valley Basin, Colombia



Depositional and provenance record of the Paleogene transition from foreland to hinterland basin evolution during Andean orogenesis, northern Middle Magdalena Valley Basin, Colombia



Journal of South American Earth Sciences 32(3): 0-263



The Central Cordillera and Eastern Cordillera of the northern Andes form the topographic flanks of the north-trending Magdalena Valley Basin. Constraining the growth of these ranges and intervening basin has implications for Andean shortening and the transformation from a foreland to hinterland basin configuration. We present sedimentological, paleocurrent, and sandstone petrographic results from Cenozoic type localities to provide insights into the tectonic history of the northern Middle Magdalena Valley Basin of Colombia. In the Nuevo Mundo Syncline, the mid-Paleocene transition from marine to nonmarine deposystems of the Lisama Formation corresponds with a paleocurrent shift from northward to eastward transport. These. Highlights: Paleogene strata record distal foreland to proximal hinterland basin conditions. Cenozoic evolution from marginal marine to meandering and braided fluvial systems. Paleocurrents and sand compositions record major shifts in sediment source areas. Provenance shifts record initial uplift of fold-thrust structures to east and west. A mid-Paleocene provenance reversal records initial Central Cordillera uplift. A late Eocene provenance reversal records initial Eastern Cordillera uplift.

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Accession: 036123959

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DOI: 10.1016/j.jsames.2011.03.018


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