Back folds in the core of the Himalayan Orogen; an alternative interpretation

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doi: 10.1130/0091-7613(1999)027<0151:BFITCO>2.3.CO;2
Authors:Godin, Laurent; Brown, Richard L.; Hanmer, Simon; Parrish, Randall
Author Affiliations:Primary:
Carleton University, Department of Earth Sciences, Ottawa, ON, Canada
Geological Survey of Canada, Canada
NERC Isotope Geosciences Laboratory, United Kingdom
Volume Title:Geology (Boulder)
Source:Geology (Boulder), 27(2), p.151-154. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613
Publication Date:1999
Note:In English. With GSA Data Repository Item 9914. 26 refs.; illus., incl. sects., geol. sketch map
Summary:The hanging wall of the South Tibetan detachment system in the central Nepal Himalaya is characterized by regional-scale, northeast-verging folds, classically interpreted as gravity-induced structures developed during down-to-the-north extensional shearing along the detachment system. New structural observations and balanced cross sections of the Tethyan sedimentary sequence in the Kali Gandaki area and new U-Pb geochronology support an alternative interpretation. The northeast-verging folds developed before ductile extensional shearing along the detachment system, thereby recording some of the earliest contraction of this part of the orogen. We propose a new model in which the northeast-verging folds of the Kali Gandaki area represent the northern part of a late Eocene to Oligocene contractional fan structure.
Subjects:Absolute age; Cenozoic; Contraction; Dates; Detachment faults; Faults; Folds; Geodynamics; Gravity sliding; Hanging wall; Himalayan Orogeny; Leucosomes; Metamorphic rocks; Migmatites; Nappes; Orogeny; Sedimentary rocks; Tectonics; Tertiary; Tethys; U/Pb; Asia; Himalayas; Indian Peninsula; Nepal; Kali Gandaki Nepal
Coordinates:N283000 N290000 E0843000 E0833000
Abstract Numbers:99M/3113
Record ID:1999021265
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
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