Interaction between critical wedge geometry and sediment supply in a deep-water fold belt

Abstract

Research Article| February 01, 2007 Interaction between critical wedge geometry and sediment supply in a deep-water fold belt C.K. Morley C.K. Morley 1272 Baan Yosawaadi, 7, Pahonyohothin, Bangkok 10500, Thailand Search for other works by this author on: GSW Google Scholar Geology (2007) 35 (2): 139–142. https://doi.org/10.1130/G22921A.1 Article history received: 21 Apr 2006 rev-recd: 13 Sep 2006 accepted: 25 Sep 2006 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation C.K. Morley; Interaction between critical wedge geometry and sediment supply in a deep-water fold belt. Geology 2007;; 35 (2): 139–142. doi: https://doi.org/10.1130/G22921A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The late Miocene–Holocene deep-water fold-and-thrust belt of offshore northwestern Borneo displays one of the most acute angles recorded for a submarine critical-taper wedge. The very low surface (1°–2.5°) and basal detachment (2°–5°) dips require basal pore-fluid pressures near lithostatic pressure for the wedge to propagate at such angles. In the deep-water environment, sedimentary processes act against the wedge attaining critical taper. In places of lower sedimentation rates, the fold-and-thrust belt extends to the base of the slope and dips ∼1.5°–2.5°. In areas of the highest sedimentation rates (Baram Delta), the slope has a lower angle (1°) and the slope continues beyond the limit of the fold-and-thrust belt. Slope morphology changes along the margin from concave up (relatively low sedimentation rate, low shortening rate), to convex up (relatively high sedimentation rate, low shortening rate), to stepped (relatively low sedimentation rate, high shortening rate). You do not have access to this content, please speak to your institutional administrator if you feel you should have access.