New constraints on the age of the Manaslu leucogranite: Evidence for episodic tectonic denudation in the central Himalayas

Research Article| June 01, 1994 New constraints on the age of the Manaslu leucogranite: Evidence for episodic tectonic denudation in the central Himalayas Stéphane Guillot; Stéphane Guillot 1Laboratoire de Géodynamique des Chaînes Alpines, Centre National de la Recherche Scientifique, Institut Dolomieu, 38031 Grenoble, France Search for other works by this author on: GSW Google Scholar Kip Hodges; Kip Hodges 2Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Search for other works by this author on: GSW Google Scholar Patrick Le Fort; Patrick Le Fort 1Laboratoire de Géodynamique des Chaînes Alpines, Centre National de la Recherche Scientifique, Institut Dolomieu, 38031 Grenoble, France Search for other works by this author on: GSW Google Scholar Arnaud Pêcher Arnaud Pêcher 1Laboratoire de Géodynamique des Chaînes Alpines, Centre National de la Recherche Scientifique, Institut Dolomieu, 38031 Grenoble, France Search for other works by this author on: GSW Google Scholar Author and Article Information Stéphane Guillot 1Laboratoire de Géodynamique des Chaînes Alpines, Centre National de la Recherche Scientifique, Institut Dolomieu, 38031 Grenoble, France Kip Hodges 2Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Patrick Le Fort 1Laboratoire de Géodynamique des Chaînes Alpines, Centre National de la Recherche Scientifique, Institut Dolomieu, 38031 Grenoble, France Arnaud Pêcher 1Laboratoire de Géodynamique des Chaînes Alpines, Centre National de la Recherche Scientifique, Institut Dolomieu, 38031 Grenoble, France Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1994) 22 (6): 559–562. https://doi.org/10.1130/0091-7613(1994)022<0559:NCOTAO>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 Stéphane Guillot, Kip Hodges, Patrick Le Fort, Arnaud Pêcher; New constraints on the age of the Manaslu leucogranite: Evidence for episodic tectonic denudation in the central Himalayas. Geology 1994;; 22 (6): 559–562. doi: https://doi.org/10.1130/0091-7613(1994)022<0559:NCOTAO>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 Manaslu leucogranite of central Nepal transacts one segment of the South Tibetan detachment system, a major extensional feature that helped to moderate large topographic gradients in the Himalayan orogen in middle Tertiary time. 40Ar/39Ar ages for hornblendes from the northeastern contact aureole of the pluton indicate that intrusion occurred prior to 22-23 Ma, providing a minimum age for formation of the detachment system in the Manaslu region that is at least 2 m.y. older than previous estimates from other parts of the orogen. 40Ar/39Ar mica ages from the aureole, similar to previously published mica ages from the upper part of the leucogranite, indicate an episode of rapid cooling at ∼19-16 Ma. We attribute this cooling event to tectonic denudation of the pluton by movement on structurally higher exten-sional faults, and we suggest that gravitational collapse of the orogenic front occurred episodically over the late Oligocene-early Miocene interval in the Manaslu area. 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.