Decoding Subsurface Secondary Mineralisation and its Impact on Cohesive Strength:An Outcome of the Deep Scientific Drilling Program in the Koyna-Warna Seismogenic Region,Western India  

作　　者：Halder PIYAL Sharma ANUPAM Kumar Shukla MATSYENDRA Kumar KAMLESH 

机构地区：[1]Birbal Sahni Institute of Palaeosciences(DST,Govt.of India),Lucknow,U.P.,India [2]Academy of Scientific and Innovative Research(AcSIR),Ghaziabad-201002,India [3]Government of India,Ministry of Earth Sciences,Borehole Geophysics Research Laboratory,Karad,Maharashtra,India

出　　处：《Acta Geologica Sinica(English Edition)》2024年第S01期44-50,共7页地质学报（英文版）

基　　金：the Ministry of Earth Sciences,Govt of India,for the financial support[MoES/P.O.(Seismo)/1(374)/2019]and Dr.Sukanta Roy,Project Director,MoES-BGRL,Karad,for providing samples.

摘　　要：The Koyna-Warna seismogenic region overlying the Deccan volcanic province of Western India has been experiencing the recurrence of earthquakes since 1967 soon after the impoundment of the Koyna Dam.A large number of small to medium-magnitude shallow focus earthquakes(>100,000)have been detected in this intraplate region during the last six decades.In the present study,the core samples recovered from the borehole‘KBH3’drilled upto 1134 m depth in the pre-Deccan granitoids basement rocks of this region have been subjected to mineralogical and geochemical studies.

关 键 词：fluid-rock interaction FAULTS CHLORITE hydrothermal alteration recurring seismicity 

分 类 号：P315[天文地球—地震学] P58[天文地球—固体地球物理学]