Diapirlike Features Offshore Honduras: Implications Regarding Tectonic Evolution of Cayman Trough and Central America

Research Article| July 01, 1972 Diapirlike Features Offshore Honduras: Implications Regarding Tectonic Evolution of Cayman Trough and Central America PAUL R PINET PAUL R PINET Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 Search for other works by this author on: GSW Google Scholar Author and Article Information PAUL R PINET Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 Publisher: Geological Society of America Received: 22 Nov 1971 Revision Received: 17 Feb 1972 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1972, 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 (1972) 83 (7): 1911–1922. https://doi.org/10.1130/0016-7606(1972)83[1911:DFOHIR]2.0.CO;2 Article history Received: 22 Nov 1971 Revision Received: 17 Feb 1972 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation PAUL R PINET; Diapirlike Features Offshore Honduras: Implications Regarding Tectonic Evolution of Cayman Trough and Central America. GSA Bulletin 1972;; 83 (7): 1911–1922. doi: https://doi.org/10.1130/0016-7606(1972)83[1911:DFOHIR]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 A seismic-reflection survey along the continental margin of Honduras has uncovered an assemblage of diapirlike bodies. Features such as disrupted and upturned flank reflectors as well as a domed and faulted overburden suggest that the bodies are truly piercement structures. Although unequivocal evidence is lacking, the diapirs are probably salt. The bodies are shallow and corroboration could be obtained by drilling (Fig. 1).The Cayman Trough is a locus of intense tectonism along which the Caribbean plate is considered to be decoupled from the North America plate. Salt offshore Honduras (Caribbean plate) may have been displaced eastward by about 1,000 km relative to presumably equivalent salt deposits in Guatemala (North America plate). Hence, slip rates for the lithospheric plates in the northwestern Caribbean can be estimated to lie between 1 and 2 cm/yr, depending on whether the transcurrent motions were initiated in the mid-Mesozoic or the mid-Cenozoic.The bulk of the data available from this and other studies convinces one that the Cayman Trough is a strike-slip feature. Consequently, a sphenochasm model for the structural evolution of the Gulf of Honduras that delegates strike-slip faulting to a subordinate role is improbable. A model involving the relative clockwise rotation of Honduras from Yucatan in the mid-Mesozoic followed in the mid-Tertiary by roughly 300 km of sinistral, strike-slip displacement localized along the Cayman Trough is conceivable but unlikely. Additional magnetic surveying will probably be needed to test this model. 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.