Seismic characterization of an active metamorphic massif, Nanga Parbat, Pakistan Himalaya

Abstract

Research Article| July 01, 2001 Seismic characterization of an active metamorphic massif, Nanga Parbat, Pakistan Himalaya Anne Meltzer; Anne Meltzer 1Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar Golam Sarker; Golam Sarker 1Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar Bruce Beaudoin; Bruce Beaudoin 1Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar Leonardo Seeber; Leonardo Seeber 2Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar John Armbruster John Armbruster 2Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Geology (2001) 29 (7): 651–654. https://doi.org/10.1130/0091-7613(2001)029<0651:SCOAAM>2.0.CO;2 Article history received: 28 Aug 2000 rev-recd: 02 Mar 2001 accepted: 13 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 Anne Meltzer, Golam Sarker, Bruce Beaudoin, Leonardo Seeber, John Armbruster; Seismic characterization of an active metamorphic massif, Nanga Parbat, Pakistan Himalaya. Geology 2001;; 29 (7): 651–654. doi: https://doi.org/10.1130/0091-7613(2001)029<0651:SCOAAM>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 Earthquakes recorded by a dense seismic array at Nanga Parbat, Pakistan, provide new insight into synorogenic metamorphism and mass flow during mountain building. Microseismicity beneath the massif drops off sharply with depth and defines a shallow transition between brittle failure and ductile flow. The base of seismicity bows upward, mapping a thermal boundary with 3 km of structural relief over a lateral distance of 12 km. Anomalously low seismic velocities are observed at the core of the massif and extend to depth through the crust. The main locus of seismicity and low velocities correlates with a region of high topography, rapid exhumation, high geothermal gradients, young metamorphic and igneous ages, and crustal fluid flow. We suggest a genetic link between these phenomena in which hot rocks, rapidly advected from depth, are pervasively modified at relatively shallow levels in the crust. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.