Depth-dependent stretching: A different approach

Abstract

Research Article| January 01, 1986 Depth-dependent stretching: A different approach David B. Rowley; David B. Rowley 1Department of Geophysical Sciences, University of Chicago, Chicago, Illinois 60637 Search for other works by this author on: GSW Google Scholar Dork Sahagian Dork Sahagian 1Department of Geophysical Sciences, University of Chicago, Chicago, Illinois 60637 Search for other works by this author on: GSW Google Scholar Geology (1986) 14 (1): 32–35. https://doi.org/10.1130/0091-7613(1986)14<32:DSADA>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 David B. Rowley, Dork Sahagian; Depth-dependent stretching: A different approach. Geology 1986;; 14 (1): 32–35. doi: https://doi.org/10.1130/0091-7613(1986)14<32:DSADA>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 SocietyGeology Search Advanced Search Abstract Uplift of the crust during rifting is a major problem that has been left unresolved by uniform stretching models. Various depth-dependent stretching models have been proposed to account for this, but these require decoupling of the crust and mantle and result in space problems within the mantle. A significant modification of these discontinuous nonuniform or depth-dependent stretching models is proposed here that accounts for synrift uplift and doming but does not result in these problems. The model involves continuous nonuniform stretching within a polygonal region bounded by symmetrical, outward-sloping boundaries within the mantle. This geometry results in thinning of the lithosphere below crustal regions that are less stretched or unstretched, crustal uplift resulting from asthenospheric upwelling below these regions. This in turn results in stretching factors for the mantle that are less than those for the crust, a relationship opposite to relationships derived by discontinuous nonuniform stretching models. Corollary predictions for mantle-derived heat flow within and outside regions of stretching of these two different depth-dependent models may allow them to be distinguished from each other and from regions where uniform stretching predominates. 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.