HIMPROBE is an Indian national project, active since 2000, to create a NW-Himalayan geotransect from the Sub-Himalaya to the Karakoram Range. Framework broadband seismology, broadband MT, the first phase of seismic reflection, and a comprehensive potential-field transect have already been conducted. Coupled with geological investigations, these projects make this area more data-rich than most regions of the orogen.
We have worked with NGRI (National Geophysical Research Institute) scientists on broadband passive seismic data, seismic reflection data, and geochemical sampling; and with IIT Roorkee scientists on geologic sampling and radiometric dating. At Stanford, we are using broadband seismic data from HIMPROBE to reveal lithospheric structure. We have analyzed the dispersion of fundamental mode Rayleigh waves and identified a low-velocity zone in the mid-crust north of the Indus-Tsangpo suture (ITS) coincident with a zone of high electrical conductivty observed by magnetotelluric measurements - a result consistent with active channel flow outwards from the Tibet Plateau. Our CCP images of broadband data from the Garwhal Himalaya suggest a major role for fluids in controlling the seismogenesis of the Main Himalayan Thrust.
Related Departments: Geophysics
2013 Caldwell, W.B., Klemperer, S.L., Lawrence, J.F., Rai, S.S., and Ashish. Characterizing the Main Himalayan Thrust in the Garhwal Himalaya, India with receiver function CCP stacking. Earth Planetary Science Letters, 2013, 367, 15-27, 10.1016/j.epsl.2013.02.009
2013 Klemperer, S.L., Kennedy, B.M., Sastry, S.R., Makovsky, Y., Harinarayana, T., and Leech, M.L. Mantle fluids in the Karakoram fault: Helium isotope evidence, Earth Planetary Science Letters, 366, 59-70, 10.1016/j.epsl.2013.01.013
2011 Rajendra Prasad, B., Klemperer, S.L., Vijaya Rao, V., Tewari, H.C., and Khare, P. Crustal structure beneath the Sub-Himalayan fold-thrust belt, Kangra recess, northwest India, from seismic reflection profiling: implications for Late Paleoproterozoic orogenesis and modern earthquake hazard. Earth Planet. Sci. Letts., 308, 218–228.
2010 Leech, M.L., Klemperer, S.L., and Mooney, W.D., eds., 2010, Proceedings of the 25th Himalaya-Karakoram-Tibet Workshop: U.S. Geological Survey Open-File Report 2010-1099. http://pubs.usgs.gov/of/2010/1099/
2009 Caldwell, W.B., Klemperer, S.L., Rai, S.S., and Lawrence, J.F., 2009. Partial melt in the upper-middle crust of the northwest Himalaya revealed by Rayleigh wave dispersion. Tectonophysics, v. 477, 58-65, doi:10.1016/j.tecto.2009.01.013.
2005 Leech, M.L., Singh, S., Jain, A.K., Klemperer, S.L., and Manickavasagam, R.M. The onset of India-Asia continental collision: early, steep subduction required by the timing of UHP metamorphism in the western Himalaya, Earth Planet. Sci. Letts., v. 234, 83-97. (and Leech, M.L., Singh, S., Jain, A.K., Klemperer, S.L., and Manickavasagam, R.M., 2006, Reply to comment by P.J. O'Brien, Earth Planetary Science Letters 234 (2005) 83-97, Earth Planet. Sci. Letts., v. 245, 817-820.