107-16 Siliciclastic Sediment Routing Driving Basin-Margin Evolution in Arid Mixed Siliciclastic-Carbonate Systems, Northern Delaware Basin
Session: Sedimentary Geology Division/SEPM Student Research Poster Competition: Dynamics of Stratigraphy and Sedimentation
Poster Booth No.: 159
Presenting Author:
Jennifer KohnAuthors:
Kohn, Jennifer1, Covault, Jacob2, Sylvester, Zoltan3(1) University of Texas at Austin, Jackson School of Geosciences, Austin, Texas, USA, (2) Bureau of Economic Geology, University of Texas at Austin, Jackson School of Geosciences, Austin, Texas, USA, (3) Bureau of Economic Geology, University of Texas at Austin, Jackson School of Geosciences, Austin, Texas, USA,
Abstract:
Proposed siliciclastic sediment delivery mechanisms to the Permian Basin include shelf-margin mass wasting of aeolian dust, coastal dune capture, and fluvial input. Using ~1000 square miles of 3D seismic-reflection data (SLB Lea and Fairfield Red Tank surveys), we interpret five horizons across the northwestern Central Basin Platform (CBP), San Simon Channel (SSC), and northern Delaware Basin to examine basin-margin architecture and siliciclastic routing in the Guadalupian Brushy Canyon and Cherry Canyon formations, along with their platform equivalents (Upper San Andres and Grayburg formations).
The Brushy Canyon Formation forms a thick wedge in the northern Delaware Basin, onlapping steep CBP and Northwest Shelf margins. Seismic attribute maps show backstepping of depositional systems in the basin, from low-sinuosity submarine channels to distributary lobes. The overlying Upper San Andres Formation comprises westward-prograding mixed carbonate-siliciclastic clinoforms on the CBP and within the SSC, reaching 150 m in relief. These clinoforms transition to a few relatively wide (up to 900 m) submarine channels of the Cherry Canyon Formation. The stratigraphic evolution from the Brushy Canyon to Cherry Canyon Formation reflects a basinward shift in deposition in concert with renewed progradation of the basin margin. The closure of the SSC during San Andres-Cherry Canyon deposition might promote a reorganization of sediment routing leading to the transition in depositional patterns. Future lithologic work from core and well-log will clarify specific delivery mechanisms. This research provides insights into sediment delivery mechanisms for mixed siliciclastic-carbonate margins in arid environments, where episodic siliciclastic supply and routing reorganization influences basin architecture.
Geological Society of America Abstracts with Program. Vol. 57, No. 6, 2025
doi: 10.1130/abs/2025AM-8265
© Copyright 2025 The Geological Society of America (GSA), all rights reserved.
Siliciclastic Sediment Routing Driving Basin-Margin Evolution in Arid Mixed Siliciclastic-Carbonate Systems, Northern Delaware Basin
Category
Topical Sessions
Description
Session Format: Poster
Presentation Date: 10/20/2025
Presentation Room: HBGCC, Hall 1
Poster Booth No.: 159
Author Availability: 9:00–11:00 a.m.
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