Single-channel seismic reflection data from the East Pacific Rise axis between latitude 11°50′ and 12°54′N

Research Article| September 01, 1987 Single-channel seismic reflection data from the East Pacific Rise axis between latitude 11°50′ and 12°54′N Félix Avedik; Félix Avedik 1Marine Geosciences Department, IFREMER (Institut Fracçais de Recherche pour I'Exploitation de la Mer), BP 337 - 29273 Brest Cedex, France Search for other works by this author on: GSW Google Scholar Louis Géli Louis Géli 1Marine Geosciences Department, IFREMER (Institut Fracçais de Recherche pour I'Exploitation de la Mer), BP 337 - 29273 Brest Cedex, France Search for other works by this author on: GSW Google Scholar Author and Article Information Félix Avedik 1Marine Geosciences Department, IFREMER (Institut Fracçais de Recherche pour I'Exploitation de la Mer), BP 337 - 29273 Brest Cedex, France Louis Géli 1Marine Geosciences Department, IFREMER (Institut Fracçais de Recherche pour I'Exploitation de la Mer), BP 337 - 29273 Brest Cedex, France Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1987) 15 (9): 857–860. https://doi.org/10.1130/0091-7613(1987)15<857:SSRDFT>2.0.CO;2 Article history 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 Félix Avedik, Louis Géli; Single-channel seismic reflection data from the East Pacific Rise axis between latitude 11°50′ and 12°54′N. Geology 1987;; 15 (9): 857–860. doi: https://doi.org/10.1130/0091-7613(1987)15<857:SSRDFT>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 Two single-channel seismic profiles were recorded in 1981 during a cruise of R/V Jean Charcot along the axis of the East Pacific Rise between lat 11°50′ N and 12°54′ N. The seismic source was a 1.3−1 (80 in3) water gun. The ship's track was kept on the rise axis by using the real-time mapping capabilities of the SeaBeam echo sounder. The seismic data were recorded in analog form and no signal processing was performed. The seismic sections revealed the existence of segments of 7- to 30-km-long coherent arrivals located at about 0.6 s two-way traveltime below the sea-floor reflection. The same time difference observed for the water-borne multiple of these arrivals is a strong indication that these segments of reflection are not side echoes but vertical-incidence reflections originating from the subbottom. The correlation between the seismic data and some geologic observations in the area near lat 12°–13°N indicates that the observed reflections are probably associated with the roof of discontinuous magma chambers situated at an average depth of about 1.5 km below the sea floor. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.