DOI: 10.1007/s00531-014-1128-0
Scopus记录号: 2-s2.0-84940961358
论文题名: Investigations related to scientific deep drilling to study reservoir-triggered earthquakes at Koyna, India
作者: Gupta H. ; Purnachandra Rao N. ; Roy S. ; Arora K. ; Tiwari V.M. ; Patro P.K. ; Satyanarayana H.V.S. ; Shashidhar D. ; Mallika K. ; Akkiraju V.V. ; Goswami D. ; Vyas D. ; Ravi G. ; Srinivas K.N.S.S.S. ; Srihari M. ; Mishra S. ; Dubey C.P. ; Raju D.C.V. ; Borah U. ; Chinna Reddy K. ; Babu N. ; Rohilla S. ; Dhar U. ; Sen M. ; Bhaskar Rao Y.J. ; Bansal B.K. ; Nayak S.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期: 6 起始页码: 1511
结束页码: 1522
语种: 英语
英文关键词: Earthquake
; Koyna
; Reservoir
; Scientific drilling
; Triggered seismicity
Scopus关键词: borehole
; deep drilling
; earthquake
; earthquake hypocenter
; fault zone
; heat flow
; lidar
; reservoir
; seismic zone
; seismicity
; trigger mechanism
; Deccan
; India
; Koyna
; Maharashtra
; Calluna vulgaris
英文摘要: Artificial water reservoir-triggered earthquakes have continued at Koyna in the Deccan Traps province, India, since the impoundment of the Shivaji Sagar reservoir in 1962. Existing models, to comprehend the genesis of triggered earthquakes, suffer from lack of observations in the near field. To investigate further, scientific deep drilling and setting up a fault zone observatory at depth of 5–7 km is planned in the Koyna area. Prior to undertaking deep drilling, an exploratory phase of investigations has been launched to constrain subsurface geology, structure and heat flow regime in the area that provide critical inputs for the design of the deep borehole observatory. Two core boreholes drilled to depths of 1,522 and 1,196 m have penetrated the Deccan Traps and sampled the granitic basement in the region for the first time. Studies on cores provide new and direct information regarding the thickness of the Deccan Traps, the absence of infra-Trappean sediments and the nature of the underlying basement rocks. Temperatures estimated at a depth of 6 km in the area, made on the basis of heat flow and thermal properties data sets, do not exceed 150 °C. Low-elevation airborne gravity gradient and magnetic data sets covering 5,012 line km, together with high-quality magnetotelluric data at 100 stations, provide both regional information about the thickness of the Deccan Traps and the occurrence of localized density heterogeneities and anomalous conductive zones in the vicinity of the hypocentral zone. Acquisition of airborne LiDAR data to obtain a high-resolution topographic model of the region has been completed over an area of 1,064 km2 centred on the Koyna seismic zone. Seismometers have been deployed in the granitic basement inside two boreholes and are planned in another set of six boreholes to obtain accurate hypocentral locations and constrain the disposition of fault zones. © 2014, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940961358&doi=10.1007%2fs00531-014-1128-0&partnerID=40&md5=dcc1ce1290012760f6d9cec1270f0616
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70263
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: National Disaster Management Authority, New Delhi, India; CSIR-National Geophysical Research Institute, Hyderabad, India; Ministry of Earth Sciences, New Delhi, India
Recommended Citation:
Gupta H.,Purnachandra Rao N.,Roy S.,et al. Investigations related to scientific deep drilling to study reservoir-triggered earthquakes at Koyna, India[J]. International Journal of Earth Sciences,2015-01-01,104(6)