• journal_title：Geology
• Contributor：Laurent Godin ; Richard L. Brown ; Simon Hanmer ; Randall Parrish
• Publisher：Geological Society of America
• Date：1999-
• Format：text/html
• Language：en
• Identifier：10.1130/0091-7613(1999)027<0151:BFITCO>2.3.CO;2
• journal_abbrev：Geology
• issn：0091-7613
• volume：27
• issue：2
• firstpage：151

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.