Gas hydrate and mud volcanoes on the southwest African continental margin off South Africa

Abstract

Research Article| October 01, 2002 Gas hydrate and mud volcanoes on the southwest African continental margin off South Africa Zvi Ben-Avraham; Zvi Ben-Avraham 1Department of Geophysics and Planetary Sciences, Tel Aviv University, Tel Aviv 69978, Israel, and Department of Geological Sciences, University of Cape Town, Rondebosch 7700, South Africa Search for other works by this author on: GSW Google Scholar George Smith; George Smith 2Department of Geological Sciences, University of Cape Town, Rondebosch 7700, South Africa Search for other works by this author on: GSW Google Scholar Moshe Reshef; Moshe Reshef 3Department of Geophysics and Planetary Sciences, Tel Aviv University, Tel Aviv 69978, Israel Search for other works by this author on: GSW Google Scholar Eric Jungslager Eric Jungslager 4Petroleum Agency SA, 151 Frans Conradie Drive, Parow 7500, South Africa Search for other works by this author on: GSW Google Scholar Geology (2002) 30 (10): 927–930. https://doi.org/10.1130/0091-7613(2002)030<0927:GHAMVO>2.0.CO;2 Article history received: 07 Mar 2002 rev-recd: 13 Jun 2002 accepted: 21 Jun 2002 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Zvi Ben-Avraham, George Smith, Moshe Reshef, Eric Jungslager; Gas hydrate and mud volcanoes on the southwest African continental margin off South Africa. Geology 2002;; 30 (10): 927–930. doi: https://doi.org/10.1130/0091-7613(2002)030<0927:GHAMVO>2.0.CO;2 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 Widespread occurrence of bottom-simulating reflectors (BSRs) has been detected in multichannel seismic profiles on the upper continental slope in the southern periphery of the Orange River delta, probably indicating the presence of large quantities of gas hydrate in this area. This report is the first to show the presence of BSRs on seismic records on the southwest African continental margin south of the Walvis Ridge. Another remarkable feature in the area is the occurrence of a large number of mud volcanoes. The distribution of the BSRs and the location of the mud volcanoes are controlled by the locations of active faults. The gas hydrate in this region may consist of a mixture of microbial and thermogenic gas, whereas much of the gas flowing through the mud volcanoes probably originated from deep-seated Aptian source shales. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.