Mass Balance of Cenozoic Andes-Amazon Source to Sink System—Marañón Basin, Peru

• Published in: Geosciences (Basel) Vol. 8; no. 5; p. 167
• Main Authors: Calvès, Gérôme, Calderón, Ysabel, Hurtado Enriquez, Christian, Brusset, Stéphane, Santini, William, Baby, Patrice
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-05-2018; MDPI
• Subjects: Andes; Cenozoic; Continental interfaces, environment; Earth science; Earth Sciences; Erosion; Evolution; Geomorphology; Hydrology; Landforms; Marañón Basin; mass balance; Mesozoic; Neogene; Peru; Rocks; Sciences of the Universe; Sedimentary basins; Sedimentation; sedimentation rate; Sedimentation rates; Sediments; source to sink; Stratigraphy; Tectonics; Uplift; Peru; Andes; mass balance; Marañón Basin; source to sink; erosion; Cenozoic; Peru; sedimentation rate
• ISSN: 2076-3263; 2076-3263
• DOI: 10.3390/geosciences8050167

We investigate the mass balance of the Cenozoic Andes-Amazon source to sink system using rock uplift proxies and solid sedimentation of the Marañón Basin in Peru. The evolution of sedimentation rates is calibrated with regional structural restored cross-section. The quantification of eroded sediments from reliefs to sedimentary basin is achieved with ×10 Myr resolution and compared to present day proxies from the HYBAM (HYdrologie et Biogéochimie du Bassin Amazonien) Critical Zone Observatory. Erosion of the early Andean landforms started during the Upper Mesozoic period, but sediment rates significantly increase during the Neogene. This is in agreement with the calibrated increase of rock uplift in the Andean orogenic belt.