New Mexico Geological Society Annual Spring Meeting — Abstracts

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Extension Rates Impact on Endorheic Drainage Longevity and Regional Sediment Discharge

Michael Berry1, Jolante van Wijk1, Daniel Cadol1, Daniel Garica-Costellanos2 and Erica Emry2

1New Mexico Tech, Socorro, NM, 87801,
2ICTJA-CSIC, Barcelona, Spain

Tectonic and climate drivers exert co-equal forces on the evolution of tectonic sedimentary basins. The Rio Grande rift and its drainages provide a backdrop for discussing which drivers drive the transition from endorheic or closed drainage basins to exorheic or open, through-going drainage basins, with both climatic and tectonic drivers being proposed by researchers. With a dearth of regional scale extensional landscape modeling studies to draw from, we explore the impact of tectonic extension on endorheic-exorheic transitions and regional sediment and water discharge in both a “dry” and “wet” runoff regimes. We show that holding climate-induced runoff constant, that greater extensional rates correspond to a longer period of sedimentation capture, tectonically induced gradients significantly increases sedimentation long after tectonic activity has terminated, and that developing an endorheic basin is very difficult in high runoff regimes.

pp. 17

2018 New Mexico Geological Society Annual Spring Meeting
April 13, 2018, Macey Center, New Mexico Tech campus, Socorro, NM