Geophysical Anomalies over the Eu- and Miogeosynclinal Systems of California and New Zealand

Abstract

Research Article| February 01, 1969 Geophysical Anomalies over the Eu- and Miogeosynclinal Systems of California and New Zealand TREVOR HATHERTON TREVOR HATHERTON Geophysics Division, Department of Scientific and Industrial Research, Wellington, New Zealand Search for other works by this author on: GSW Google Scholar Author and Article Information TREVOR HATHERTON Geophysics Division, Department of Scientific and Industrial Research, Wellington, New Zealand Publisher: Geological Society of America Received: 18 Mar 1968 Revision Received: 26 Jul 1968 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1969, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1969) 80 (2): 213–230. https://doi.org/10.1130/0016-7606(1969)80[213:GAOTEA]2.0.CO;2 Article history Received: 18 Mar 1968 Revision Received: 26 Jul 1968 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation TREVOR HATHERTON; Geophysical Anomalies over the Eu- and Miogeosynclinal Systems of California and New Zealand. GSA Bulletin 1969;; 80 (2): 213–230. doi: https://doi.org/10.1130/0016-7606(1969)80[213:GAOTEA]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 SocietyGSA Bulletin Search Advanced Search Abstract In both California and New Zealand, geophysical anomalies occur over the junction of the eu- and miogeosynclinal facies, and over the miogeosynclinal sediments. The "junction anomalies" indicate virtually continuous belts of mafic and ultramafic rocks between the shallow-and deep-water facies. Serpentine and andesite have the physical properties appropriate to explain the "syncline anomalies," and attention is drawn to the presence of chemically similar andesites, younger than the sediments, which appear as outcrops on the crests of the syncline anomalies. The similarity of possible ultramafic and andesite occurrences in the Tasman Basin-Macquarie Ridge-Solander Trough system, at present devoid of sediments, to those of the California and New Zealand systems, leads to the hypothesis that an ultramafic-cored ridge predates sedimentation and acts as a buffer between the two types of sediments during the orogenic phase. 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.