Tectonic interpretations of the East Caroline and Lyra Basins from reflection-profiling investigations

Research Article| March 01, 1976 Tectonic interpretations of the East Caroline and Lyra Basins from reflection-profiling investigations DALE L. ERLANDSON; DALE L. ERLANDSON 1Hawaii Institute of Geophysics, University of Hawaii, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar THEODORE L. ORWIG; THEODORE L. ORWIG 1Hawaii Institute of Geophysics, University of Hawaii, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar GLENN KIILSGAARD; GLENN KIILSGAARD 1Hawaii Institute of Geophysics, University of Hawaii, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar JAMES H. MUSSELLS; JAMES H. MUSSELLS 1Hawaii Institute of Geophysics, University of Hawaii, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar LOREN W. KROENKE LOREN W. KROENKE 1Hawaii Institute of Geophysics, University of Hawaii, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1976) 87 (3): 453–462. https://doi.org/10.1130/0016-7606(1976)87<453:TIOTEC>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 DALE L. ERLANDSON, THEODORE L. ORWIG, GLENN KIILSGAARD, JAMES H. MUSSELLS, LOREN W. KROENKE; Tectonic interpretations of the East Caroline and Lyra Basins from reflection-profiling investigations. GSA Bulletin 1976;; 87 (3): 453–462. doi: https://doi.org/10.1130/0016-7606(1976)87<453:TIOTEC>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 Reflection profiles taken by the Hawaii Institute of Geophysics in 1970 and 1971 are the basis for a new bathymetric chart of the East Caroline and Lyra Basins. Bordered on the east and west by areas of high elevation, the Ontong Java Plateau and the Eauripik Ridge, respectively, the two basins are separated from each other by the Mussau Trough and Mussau Ridge and bounded by the Manus Trough on the south. An analysis of the reflection profiles shows that the rectilinear pattern evident throughout the region results from a set of northeast and northwest cross-trends that appear to be structurally controlled. Using the concept of an extinct sea-floor spreading center to explain the formation of most of the topographic features found in this region, these cross-trends become northeast traces of transform faults that intersect northwest-trending structural features originally developed along the axis of spreading. We interpret data obtained at Deep Sea Drilling Project (DSDP) sites 62 and 63 as evidence for a late Oligocene cessation of spreading. Subsequent motions of the Pacific and Indian plates resulted in strike-slip motion along the previously active transform faults, thus increasing offsets observed in the southern Eauripik Ridge and forming the grabens associated with the Kiilsgaard and other fracture zones. 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.