Timing of prograde metamorphism in the Zanskar Himalaya

Research Article| May 01, 1999 Timing of prograde metamorphism in the Zanskar Himalaya D. Vance; D. Vance 1Institut für Isotopengeologie, Eidgenössische Technische Hochschule, Sonneggstrasse 5, 8092 Zurich, Switzerland Search for other works by this author on: GSW Google Scholar N. Harris N. Harris 2Department of Earth Sciences, Open University, Walton Hall, Milton Keynes, MK7 6AA, UK Search for other works by this author on: GSW Google Scholar Geology (1999) 27 (5): 395–398. https://doi.org/10.1130/0091-7613(1999)027<0395:TOPMIT>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 MailTo Tools Icon Tools Get Permissions Search Site Citation D. Vance, N. Harris; Timing of prograde metamorphism in the Zanskar Himalaya. Geology 1999;; 27 (5): 395–398. doi: https://doi.org/10.1130/0091-7613(1999)027<0395:TOPMIT>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 timing of the prograde metamorphism of continental crust buried during the collision of India and Eurasia is of importance to our understanding of the mechanics of mountain building and crustal metamorphism. Our knowledge of the Himalaya indicates that continental collision (at 55–50 Ma) culminated in crustal melting and leucogranitic magmatism at 24–18 Ma. However, the timing of events in the intervening 30 m.y. is poorly understood. Here we present Sm-Nd isotope analyses of garnets from the Zanskar Himalaya that also preserve information on crustal and orogenic evolution during that period. The prograde P-T-t paths indicate that heating and burial (from 6 to 10 kbar) continued until at least 25–30 Ma and imply peak temperatures (∼700 °C) close to those necessary to cause the crustal melting in the Himalaya at ca. 20 Ma, without a requirement for additional heat sources such as shear heating on major crustal shear zones. The persistence of high temperatures as late as 20 Ma in the Himalaya may be related to postcollisional thrusting south of the suture zone and within the Indian plate at 40–35 Ma. 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.