Pressure-temperature-time path discontinuity in the Main Central thrust zone, central Nepal

Research Article| July 01, 2001 Pressure-temperature-time path discontinuity in the Main Central thrust zone, central Nepal Matthew J. Kohn; Matthew J. Kohn 1Department of Geological Sciences, University of South Carolina, Columbia, South Carolina 29208, USA Search for other works by this author on: GSW Google Scholar Elizabeth J. Catlos; Elizabeth J. Catlos 2Department of Earth and Space Sciences, University of California, Los Angeles, California 90095, USA Search for other works by this author on: GSW Google Scholar Frederick J. Ryerson; Frederick J. Ryerson 3Institute for Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, California 94550, USA Search for other works by this author on: GSW Google Scholar T. Mark Harrison T. Mark Harrison 4Department of Earth and Space Sciences, University of California, Los Angeles, California 90095, USA Search for other works by this author on: GSW Google Scholar Geology (2001) 29 (7): 571–574. https://doi.org/10.1130/0091-7613(2001)029<0571:PTTPDI>2.0.CO;2 Article history received: 05 Sep 2000 rev-recd: 07 Mar 2001 accepted: 19 Mar 2001 first online: 02 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 Matthew J. Kohn, Elizabeth J. Catlos, Frederick J. Ryerson, T. Mark Harrison; Pressure-temperature-time path discontinuity in the Main Central thrust zone, central Nepal. Geology 2001;; 29 (7): 571–574. doi: https://doi.org/10.1130/0091-7613(2001)029<0571:PTTPDI>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 Metapelites collected in central Nepal reveal a discontinuity in metamorphic pressure- temperature-time (P-T-t) paths near the base of the Main Central thrust zone, despite an absence of obvious structural breaks. Garnets in the structurally lowest rocks grew with increasing T and P (loading), whereas garnets 1–3 km upsection grew with increasing T, but decreasing P (exhumation). Monazite grains in structurally lower rocks yield ion- microprobe Th-Pb ages of 8–9 Ma. Structurally higher monazite grains range from 10 to 22 Ma. The P-T-t paths confirm previous interpretations that footwall metamorphism in part resulted from thrust reactivation ca. 8 Ma, but also reflect thermal relaxation following older (20 Ma or older) thrust movement. The Main Central thrust zone formed during pulses of movement that resulted in progressive transfer of material from the lower to upper plate. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.