Lecture-10 Active Tectonic and Seismology of Himalaya | Dr. Andrew Meigs | Oregon SU US |Naked Earth скачать в хорошем качестве

Lecture-10 Active Tectonic and Seismology of Himalaya | Dr. Andrew Meigs | Oregon SU US |Naked Earth

Earthquake sources related to the Indo-Asian collision in the NW Himalaya and Pakistan include the plate boundary fault, the Main Himalayan thrust (MHT), and faults within the upper plate in the Himalayan orogenic belt. Analysis of deformed geomorphic markers, paleoseismic trenches, and other data constrain the location and rate of active faulting. GPS data indicates a ~14 mm/yr convergence rate across the NW Himalaya. Distributed active shortening in the NW Himalaya to the SE of the Pakistan-India border partitions the shortening between a fold above a blind thrust system at the deformation front, the emergent Riasi-Balakot/Bagh fault system, and faults on the southern edge of Kashmir Basin. To the west in Pakistan, the Salt Range thrust represents the deformation front and accounts for the nearly all the shortening. Limited paleoseismic data indicate earthquake return intervals are thousands of years on the active faults.