Diagenesis, sediment strength, and pore collapse in sediment approaching the Nankai Trough subduction zone

• DOI: 10.1130/b25920.1
• Publication Date: 2006-12-18T17:30:30Z
• Authors: G. A. Spinelli; P. S. Mozley; H. J. Tobin; M. B. Underwood; N. W. Hoffman; G. M. Bellew
• Keywords: Trough (economics)

Research Article| March 01, 2007 Diagenesis, sediment strength, and pore collapse in approaching the Nankai Trough subduction zone Glenn A. Spinelli; Spinelli 1Earth & Environmental Science Department, New Mexico Institute of Mining Technology, Socorro, 87801, USA Search for other works by this author on: GSW Google Scholar Peter S. Mozley; Mozley Harold J. Tobin; Tobin Michael B. Underwood; Underwood 2Department Geological Sciences, University Missouri, Columbia, Missouri 65211, Nicole W. Hoffman; Hoffman 3Earth Glen M. Bellew 4Department Civil Engineering, GSA Bulletin (2007) 119 (3-4): 377–390. https://doi.org/10.1130/B25920.1 Article history received: 24 Oct 2005 rev-recd: 29 Sep 2006 accepted: 09 first online: 08 Mar 2017 Cite View This Citation Add to Manager Share Icon Facebook Twitter LinkedIn MailTo Tools Get Permissions Site Spinelli, Mozley, Tobin, Underwood, Hoffman, Bellew; zone. 2007;; doi: Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Dropdown Menu input auto suggest filter your All ContentBy SocietyGSA Advanced Abstract A minor amount opal cement inhibits consolidation at Ocean Drilling Program Sites 1173 1177. Secondary backscattered electron images sediments from reveal a low-density, silica phase (opal-CT) coating grain contacts. The grain-coating is more widespread upper Shikoku Basin facies than lower facies. Numerical models opal-CT content display increases with depth through cemented section. Once temperature above ∼55 °C, rate dissolution outpaces precipitation, can no longer support overburden, open framework begins collapse. Cementation followed failure consistent observed anomalies porosity, seismic velocities, shear rigidity. Porosity anomalously high nearly constant near base facies, whereas velocity same interval. Across boundary between there are step decreases porosity ∼60% ∼45%, P-wave ∼1800 m/s ∼1650 m/s, S-wave ∼550 ∼300 m/s. Similar cementation may be important locations where heating hemipelagic deposits, amounts opal, sufficient trigger diagenesis. You do not have access content, please speak institutional administrator if you feel should access.