Modes of axial reorganization on a slow-spreading ridge: The structural evolution of Kolbeinsey Ridge since 10 Ma

Research Article| May 01, 1997 Modes of axial reorganization on a slow-spreading ridge: The structural evolution of Kolbeinsey Ridge since 10 Ma Bruce Appelgate Bruce Appelgate 1School of Ocean and Earth Science and Technology, University of Hawaii, 2525 Correa Road, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar Author and Article Information Bruce Appelgate 1School of Ocean and Earth Science and Technology, University of Hawaii, 2525 Correa Road, Honolulu, Hawaii 96822 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (5): 431–434. https://doi.org/10.1130/0091-7613(1997)025<0431:MOAROA>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Bruce Appelgate; Modes of axial reorganization on a slow-spreading ridge: The structural evolution of Kolbeinsey Ridge since 10 Ma. Geology 1997;; 25 (5): 431–434. doi: https://doi.org/10.1130/0091-7613(1997)025<0431:MOAROA>2.3.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 Recently reprocessed aeromagnetic data reveal the slow-spreading Kolbeinsey Ridge underwent a regional axial reorganization at anomaly 3A time that signaled a major change in the segmentation behavior of the spreading center. Prior to anomaly 3A, the axis was a sinuous but essentially continuous feature. The anomaly 3A event separated the axis into four segments, created wide nontransform offsets, and established axial strikes more nearly orthogonal to the spreading direction. In the succeeding ∼5.5 m.y., the axis continued to evolve by ridge propagation, asymmetric spreading, and lateral ridge migration caused by either ultrafast propagation or synchronous ridge jumps. These data suggest that the brief perturbation of axial structure at anomaly 3A time may have altered the long-term segmentation behavior of the ridge. The mechanism for the ridge's segmentation and the ridge's post-segmentation behavior indicate styles of axial reorganization that may be significant on slow-spreading centers globally. 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.