Active fault traces along Bhuj Fault and Katrol Hill Fault, and trenching survey at Wandhay, Kachchh, Gujarat, India
- 185 Downloads
Several new active fault traces were identified along Katrol Hill Fault (KHF). A new fault (named as Bhuj Fault, BF) that extends into the Bhuj Plain was also identified. These fault traces were identified based on satellite photo interpretation and field survey. Trenches were excavated to identify the paleoseismic events, pattern of faulting and the nature of deformation. New active fault traces were recognized about 1km north of the topographic boundary between the Katrol Hill and the plain area. The fault exposure along the left bank of Khari River with 10m wide shear zone in the Mesozoic rocks and showing displacement of the overlying Quaternary deposits is indicative of continued tectonic activity along the ancient fault. The E-W trending active fault traces along the KHF in the western part changes to NE-SW or ENE-WSW near Wandhay village.
Trenching survey across a low scarp near Wandhay village reveals three major fault strands F1, F2, and F3. These fault strands displaced the older terrace deposits comprising Sand, Silt and Gravel units along with overlying younger deposits from units 1 to 5 made of gravel, sand and silt. Stratigraphic relationship indicates at least three large magnitude earthquakes along KHF during Late Holocene or recent historic past.
KeywordsActive fault trench investigation Kachchh Katrol Hill Fault
Unable to display preview. Download preview PDF.
- Bilham R 1998 Slip parameters for the Rann of Kachchh, India, 16 June 1819 earthquake quantified from contemporary accounts; In: Coastal Tectonics (eds) Stewart I S and Vita-Finzi C, Geol. Soc. London Spec. Publ. 146 295–319.Google Scholar
- Biswas S K 1980 Structure of Kutch-Kathiawar Region, Western India; Proc. 3rd Ind. Geol. Congr. Pune 255–272.Google Scholar
- Biswas S K and Deshpande S V 1970 Geological and tectonic maps of Kutch; Bull. Oil Nat. Gas Comm. 7 115–123.Google Scholar
- Malik J N, Sohoni P S, Merh S S and Karanth R V 2001a Active Tectonic control on Alluvial fan Architecture along the Kachchh Mainland Hill Range, Western India; Zeithschrift für Geomorphologie 45(1) 81–100.Google Scholar
- Malik J N, Nakata T, Sato H, Imaizumi T, Yoshioka T, Philip G, Mahajan A K and Karanth R V 2001b January 26, 2001, the Republic Day (Bhuj) earthquake of Kachchh and active faults, Gujarat, western India; Active Fault Research 20 112–126.Google Scholar
- McCalpin J P (ed) 1996 Paleoseismology; (New York: Academic Press) p. 588.Google Scholar
- Morino M, Malik J N, Mishra P, Bhuiyan C and Kaneko F New active fault in and around Bhuj town, Kachchh, Gujarat, India; EOS Trans. Am. Geophys. Union (communicated).Google Scholar
- Quittmeyer R C and Jacob K H 1979 Historical and modern seismicity of Pakistan, Afghanistan, North-western India and South-eastern Iran; Bull. Seismol. Soc. Am. 69 773–823.Google Scholar
- Sohoni P S, Malik J N, Merh S S and Karanth R V 1999 Active tectonics astride Katrol Hill Zone, Kachchh, Western India; J. Geol. Soc. India 53 579–586.Google Scholar