Lineaments in Deccan Basalts: The Basement Connection in the Koyna–Warna RTS Region

Abstract

Research Article| September 11, 2018 Lineaments in Deccan Basalts: The Basement Connection in the Koyna–Warna RTS Region Kusumita Arora; Kusumita Arora aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com Search for other works by this author on: GSW Google Scholar Y. Srinu; Y. Srinu aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com Search for other works by this author on: GSW Google Scholar D. Gopinadh; D. Gopinadh aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com Search for other works by this author on: GSW Google Scholar R. K. Chadha; R. K. Chadha aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com Search for other works by this author on: GSW Google Scholar Haris Raza; Haris Raza aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com Search for other works by this author on: GSW Google Scholar Valentin Mikhailov; Valentin Mikhailov bSchmidt Institute of Physics of the Earth Russian Academy of Sciences, 10 B. Gruzinskaya, Moscow 123242, Russia, mikh@ifz.ruavp@ifz.rucAlso at Lomonosov Moscow State University, Department of Physics, 1 Leninskie Gory, Moscow 119991, Russia; vs60@mail.com. Search for other works by this author on: GSW Google Scholar Alexander Ponomarev; Alexander Ponomarev bSchmidt Institute of Physics of the Earth Russian Academy of Sciences, 10 B. Gruzinskaya, Moscow 123242, Russia, mikh@ifz.ruavp@ifz.ru Search for other works by this author on: GSW Google Scholar Elena Kiseleva; Elena Kiseleva bSchmidt Institute of Physics of the Earth Russian Academy of Sciences, 10 B. Gruzinskaya, Moscow 123242, Russia, mikh@ifz.ruavp@ifz.ru Search for other works by this author on: GSW Google Scholar Vladimir Smirnov Vladimir Smirnov bSchmidt Institute of Physics of the Earth Russian Academy of Sciences, 10 B. Gruzinskaya, Moscow 123242, Russia, mikh@ifz.ruavp@ifz.rucAlso at Lomonosov Moscow State University, Department of Physics, 1 Leninskie Gory, Moscow 119991, Russia; vs60@mail.com. Search for other works by this author on: GSW Google Scholar Author and Article Information Kusumita Arora aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com Y. Srinu aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com D. Gopinadh aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com R. K. Chadha aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com Haris Raza aCSIR‐National Geophysical Research Institute, Hyderabad 500007, India, karora_ngri@yahoo.co.uksrinu.geotech35@gmail.comgopinadh840@gmail.comrajen0555@gmail.comharisraza90@gmail.com Valentin Mikhailov bSchmidt Institute of Physics of the Earth Russian Academy of Sciences, 10 B. Gruzinskaya, Moscow 123242, Russia, mikh@ifz.ruavp@ifz.rucAlso at Lomonosov Moscow State University, Department of Physics, 1 Leninskie Gory, Moscow 119991, Russia; vs60@mail.com. Alexander Ponomarev bSchmidt Institute of Physics of the Earth Russian Academy of Sciences, 10 B. Gruzinskaya, Moscow 123242, Russia, mikh@ifz.ruavp@ifz.ru Elena Kiseleva bSchmidt Institute of Physics of the Earth Russian Academy of Sciences, 10 B. Gruzinskaya, Moscow 123242, Russia, mikh@ifz.ruavp@ifz.ru Vladimir Smirnov bSchmidt Institute of Physics of the Earth Russian Academy of Sciences, 10 B. Gruzinskaya, Moscow 123242, Russia, mikh@ifz.ruavp@ifz.rucAlso at Lomonosov Moscow State University, Department of Physics, 1 Leninskie Gory, Moscow 119991, Russia; vs60@mail.com. Publisher: Seismological Society of America First Online: 11 Sep 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (5B): 2919–2932. https://doi.org/10.1785/0120180011 Article history First Online: 11 Sep 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Kusumita Arora, Y. Srinu, D. Gopinadh, R. K. Chadha, Haris Raza, Valentin Mikhailov, Alexander Ponomarev, Elena Kiseleva, Vladimir Smirnov; Lineaments in Deccan Basalts: The Basement Connection in the Koyna–Warna RTS Region. Bulletin of the Seismological Society of America 2018;; 108 (5B): 2919–2932. doi: https://doi.org/10.1785/0120180011 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract We analyzed the configurations of the lineaments derived from imagery and airborne light detection and ranging (lidar) data in the Koyna–Warna region of reservoir‐triggered seismicity (RTS). These lineaments generally correlate with aeromagnetic and gravity anomalies that may be caused by basement discontinuities and fracture systems that are expressed as north–south, northwest–southeast, and northeast–southwest features on the surface. Our results from Synthetic Aperture Radar (SAR) interferometry show displacement fields close to the Warna reservoir after M≥5.0 earthquakes in 2009. Direct evidence of faulting and slip surfaces is encountered as slickensides in deep boreholes in the region. Acoustic televiewer imaging in these boreholes shows varying patterns of fractures in the basement and in the overlying Deccan basalts. These new data support an inheritance model for basement faulting involving repeated reactivation and upward propagation of basement faults and fractures into the overlying Deccan Trap strata. We suggest that the Koyna and Warna reservoirs overlie a shear zone possibly connecting the eastern and western Dharwar cratons exposed in southern India. The repeated movements along basement faults in this shear zone enhance porosity and permeability of the fractures and provide conduits for water percolation and increase of pore fluid pressure. The presence of such fluid‐filled fractured basement rocks in the Koyna–Warna region may explain the continuously triggered earthquakes during the past five decades. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.