The southern Kahiltna terrane: Implications for the tectonic evolution of southwestern Alaska

Research Article| November 01, 1989 The southern Kahiltna terrane: Implications for the tectonic evolution of southwestern Alaska WESLEY K. WALLACE; WESLEY K. WALLACE 1ARCO Alaska, Inc., P.O. Box 100360, Anchorage, Alaska 99510-0360 Search for other works by this author on: GSW Google Scholar CATHERINE L. HANKS; CATHERINE L. HANKS 1ARCO Alaska, Inc., P.O. Box 100360, Anchorage, Alaska 99510-0360 Search for other works by this author on: GSW Google Scholar JOHN F. ROGERS JOHN F. ROGERS 1ARCO Alaska, Inc., P.O. Box 100360, Anchorage, Alaska 99510-0360 Search for other works by this author on: GSW Google Scholar Author and Article Information WESLEY K. WALLACE 1ARCO Alaska, Inc., P.O. Box 100360, Anchorage, Alaska 99510-0360 CATHERINE L. HANKS 1ARCO Alaska, Inc., P.O. Box 100360, Anchorage, Alaska 99510-0360 JOHN F. ROGERS 1ARCO Alaska, Inc., P.O. Box 100360, Anchorage, Alaska 99510-0360 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1989) 101 (11): 1389–1407. https://doi.org/10.1130/0016-7606(1989)101<1389:TSKTIF>2.3.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 WESLEY K. WALLACE, CATHERINE L. HANKS, JOHN F. ROGERS; The southern Kahiltna terrane: Implications for the tectonic evolution of southwestern Alaska. GSA Bulletin 1989;; 101 (11): 1389–1407. doi: https://doi.org/10.1130/0016-7606(1989)101<1389:TSKTIF>2.3.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 Regionally extensive and highly deformed Jurassic to Cretaceous basinal turbidite deposits occur along most of the inboard boundary of the Talkeetna superterrane in southern Alaska and western Canada. The southern Kahiltna terrane of southwestern Alaska consists largely of such basinal deposits. Regional and detailed studies in and adjacent to this terrane suggest several new conclusions regarding the origin of the basin and its role in the tectonic evolution of southwestern Alaska. Stratigraphic, sedimentologic, compositional, and structural evidence suggests that the Upper Jurassic to Lower Cretaceous strata of the southern Kahiltna terrane were derived from and deposited on rocks of the adjacent Talkeetna superterrane. Deposition of these clastic rocks apparently postdated arc magmatism in the Talkeetna superterrane, suggesting deposition in a basin developed on the suture between the Talkeetna superterrane and North America. If true, this observation implies that collision of the Talkeetna superterrane with North America began prior to latest Jurassic time, probably at a more southerly location. The superterrane has since been translated northward, probably by coast-parallel strike-slip displacement, to its present location, where it was structurally juxtaposed with middle to Upper Creteceous rocks of the Kuskokwim group. A magmatic overprint indicates that the Talkeetna superterrane was in approximately its present location by latest Cretaceous to Paleocene time. 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.