Kinematics of Tertiary structures in upper Paleozoic and Mesozoic strata on Midterhuken, west Spitsbergen

Research Article| December 01, 1986 Kinematics of Tertiary structures in upper Paleozoic and Mesozoic strata on Midterhuken, west Spitsbergen HARMON D. MAHER, JR.; HARMON D. MAHER, JR. 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706 Search for other works by this author on: GSW Google Scholar CAMPBELL CRADDOCK; CAMPBELL CRADDOCK 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706 Search for other works by this author on: GSW Google Scholar KEVIN MAHER KEVIN MAHER 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706 Search for other works by this author on: GSW Google Scholar Author and Article Information HARMON D. MAHER, JR. 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706 CAMPBELL CRADDOCK 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706 KEVIN MAHER 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1986) 97 (12): 1411–1421. https://doi.org/10.1130/0016-7606(1986)97<1411:KOTSIU>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 HARMON D. MAHER, CAMPBELL CRADDOCK, KEVIN MAHER; Kinematics of Tertiary structures in upper Paleozoic and Mesozoic strata on Midterhuken, west Spitsbergen. GSA Bulletin 1986;; 97 (12): 1411–1421. doi: https://doi.org/10.1130/0016-7606(1986)97<1411:KOTSIU>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 belt of folded and faulted Carboniferous-Cretaceous platform cover strata lies parallel to and inland of much of Spitsbergen's west coast. Uplifted older basement rocks along the coast have been thrust eastward into and over these younger platform cover strata. This deformation occurred in early Tertiary time and was related to dextral movement of the Barents Shelf past northeastern Greenland during the opening of the Norwegian-Greenland Sea. On Midterhuken, a peninsula in Bellsund, an uplifted, tilted, and faulted sequence of the cover strata forms a 3.3-km-thick, 12-km-wide margin on the eastern side of the basement crustal welt. A series of closely spaced detachment horizons within Triassic strata occurs at the boundary between a lower unit of mainly sandstones and an upper unit of mainly thin-bedded shales and siltstones. The lower unit is tilted 60°–70° to the northeast but unfolded, whereas the upper unit is tightly and disharmonically folded. Hanging-wall–down movements on these and other detachment surfaces are indicated by offset of a dike and by fold-and-fault patterns. These foreland-dipping faults might be southwest-dipping thrusts later rotated, but more likely these faults and associated folds represent detachment structures formed close to their present position in response to the uplift and tilting of these strata. 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.