Research Article| October 01, 1981 Cretaceous volcanism and Jurassic magnetic anomalies in the Nauru Basin, western Pacific Ocean Roger L. Larson; Roger L. Larson 1Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 Search for other works by this author on: GSW Google Scholar Seymour O. Schlanger Seymour O. Schlanger 2Hawaii Institute of Geophysics, University of Hawaii, Honolulu, Hawaii 06822 Search for other works by this author on: GSW Google Scholar Author and Article Information Roger L. Larson 1Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 Seymour O. Schlanger 2Hawaii Institute of Geophysics, University of Hawaii, Honolulu, Hawaii 06822 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1981) 9 (10): 480–484. https://doi.org/10.1130/0091-7613(1981)9<480:CVAJMA>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 Roger L. Larson, Seymour O. Schlanger; Cretaceous volcanism and Jurassic magnetic anomalies in the Nauru Basin, western Pacific Ocean. Geology 1981;; 9 (10): 480–484. doi: https://doi.org/10.1130/0091-7613(1981)9<480:CVAJMA>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 The Nauru Basin contains a well-documented pattern of Late Jurassic magnetic anomalies and a Cretaceous volcanic complex that has not disturbed the older magnetic structure. The following hypotheses are offered to explain this paradox. The Cretaceous basalts are normally and uniformly magnetized, making them invisible to a surface-towed magnetometer. Tension cracks and fractures associated with thermal uplift and/or magma wedging provided pathways for the Cretaceous magma through the Jurassic basement without disrupting the Jurassic magnetic structure. The same tension cracks admitted sea water that convectively removed heat from the magnetic layer and thus maintained the Jurassic basement below its magnetic blocking temperature for extended periods of time during intrusive thermal episodes. Finally, the maximum uplift associated with Cretaceous volcanism in the Nauru Basin could have been equal to, but was probably something less than, that associated with nearby seamount and atoll chains. 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.