T213 Kinematics of the Himalayan-Tibetan Orogen—Comparing the Present with the Past (Posters)
HIMALAYAN TECTONOSTRATIGRAPHIC ZONES FROM NEPAL TO PAKISTAN
Paper number: T213-1
Program: Technical Sessions
Time: 8:00 AM – 12:00 PM
Authors
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Kevin R. PogueWhitman College, Walla Walla, WA
Abstract
The Subhimalaya, MBT, and Lesser Himalaya are recognized in Pakistan but the Subhimalaya contains rock with Lesser Himalayan affinities and both the Sub- and Lesser Himalaya contain rock with Tethyan affinities. The closest analog to the MCT is the Khairabad fault which is younger and shows less displacement. North of the Khairabad fault the Pakistani hinterland contains a lower Proterozoic to Mesozoic depositional sequence which includes lower Proterozoic Lesser Himalayan Ulleri-type granitic rock, upper Proterozoic Higher Himalayan kyanite- and sillimanite-grade schist and gneiss, and Tethyan fossiliferous Paleozoic and Mesozoic platform deposits. The rocks are not in fault contact therefore the HHC, STFS, and Tibetan Tethys cannot be extrapolated to Pakistan. A possible scenario is that major displacement was transferred from the Kohistan fault to the MCT in early Miocene which then propagated westward in the middle Miocene to form the Khairabad fault. Because of decreased total shortening, the rocks in Pakistan could represent a stratigraphic link between the disparate Lesser, Higher and Tethyan stratigraphy of Kumaun and Nepal.