Crustal-scale, en echelon "P-shear" tensional bridges: A possible solution to the batholithic room problem

Research Article| October 01, 1992 Crustal-scale, en echelon "P-shear" tensional bridges: A possible solution to the batholithic room problem Basil Tikoff; Basil Tikoff 1Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455 Search for other works by this author on: GSW Google Scholar Christian Teyssier Christian Teyssier 1Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455 Search for other works by this author on: GSW Google Scholar Author and Article Information Basil Tikoff 1Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455 Christian Teyssier 1Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1992) 20 (10): 927–930. https://doi.org/10.1130/0091-7613(1992)020<0927:CSEEPS>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Basil Tikoff, Christian Teyssier; Crustal-scale, en echelon "P-shear" tensional bridges: A possible solution to the batholithic room problem. Geology 1992;; 20 (10): 927–930. doi: https://doi.org/10.1130/0091-7613(1992)020<0927:CSEEPS>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 SocietyGeology Search Advanced Search Abstract The apparent paradox of voluminous granitoid emplacement in an overall compressional magmatic are has been somewhat alleviated by the idea of pluton emplacement in tension cracks and dilational jogs within arc-parallel, strike-slip fault systems. As an alternative hypothesis, we propose that an en echelon P-shear array provides a continuous, batholith-scale zone of dilation along the trend of active magmatism and that it is favored by transpressional tectonics. In the Sierra Nevada, California, the Late Cretaceous granitoids of the Cathedral Range intrusive epoch are consistent with emplacement into bridges between P shears because (1) they are elongated oblique to the magmatic trend, consistent with P-shear orientation within a dextral system; (2) they were all emplaced within 5-10 m.y. along a 300 km trend, resulting in a displacement rate of ∼1 cm/yr across the arc; and (3) syn- to late-magmatic, dextral shear zones bound and crosscut the plutons, as in a P-shear tensional bridge. 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.