Research Article| March 01, 1985 Source of marine magnetic anomalies: Some results from DSDP Leg 83 Guy M. Smith Guy M. Smith 1Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455 Search for other works by this author on: GSW Google Scholar Author and Article Information Guy M. Smith 1Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1985) 13 (3): 162–165. https://doi.org/10.1130/0091-7613(1985)13<162:SOMMAS>2.0.CO;2 Article history First Online: 01 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 Guy M. Smith; Source of marine magnetic anomalies: Some results from DSDP Leg 83. Geology 1985;; 13 (3): 162–165. doi: https://doi.org/10.1130/0091-7613(1985)13<162:SOMMAS>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 Leg 83 of the Deep Sea Drilling Project represents the deepest penetration of undisturbed marine crust yet achieved, providing samples from the lower part of the extrusive layer and the upper 300 m of the sheeted-dike complex. We present here measurements of the magnetic properties of rocks from Leg 83 and address the question of their suitability as sources for marine magnetic anomalies. We find that, due to extensive hydrothermal alteration, the extrusive part of the Leg 83 section is insufficiently magnetized to be part of the magnetic source layer. The sheeted-dike complex, on the other hand, does have sufficient magnetization and, contrary to recent models of marine magnetization based on ophiolite studies, may be a contributor to magnetic anomalies. The strong dependence of magnetic properties on the alteration history of the rocks, however, makes extension of these results to other regions problematical. 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.