Integrated geophysical techniques have always been useful in identifying subsurface features. In the present study, three integrated geophysical methods of ground-penetrating radar (GPR), resistivity and Multi-channel Analysis (MASW) of surface waves have been utilized for near surface studies and identification of subsurface cavities near the Gadwalian dam. Acquisition of four inline and crossline profiles through GPR (100 MHz shielded antenna), two resistivity profiles through Imaging system and six seismic refraction profiles (MASW) have been made on the selected site having potential subsurface cavities. The processing and interpretation of GPR data through different software's exhibit variations in amplitude/diffraction patterns and several cavities have been identified in the GPR profiles. Sweetness attributes applied on the GPR data set also validate the cavities and unsaturated/saturated fractures. Slate beds and cavities have also been identified on pseudosections obtained through resistivity imaging. Further studies on 2D shear velocity (Vs30) profiles using MASW analysis for interpretation suggested that the absence of low velocity layer in shallow surface and velocity increase with respect to depth.
机构:
China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
Adamawa State Univ, Dept Geol, Fac Sci, PMB 25, Mubi, NigeriaChina Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
Kamaunji, Vandi Dlama
Kamaunji, Dlama Zira
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Minist Mineral Resources Headquarters, PMB 2012, Yola, Adamawa, NigeriaChina Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
Kamaunji, Dlama Zira
Gana, Victor
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Modibbo Adama Univ, Sch Phys Sci, Dept Geol, PMB 2076, Yola, NigeriaChina Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
Gana, Victor
Ntekim, Eyo Eyo
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Modibbo Adama Univ, Sch Phys Sci, Dept Geol, PMB 2076, Yola, NigeriaChina Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
Ntekim, Eyo Eyo
Ukaomah, Chima Finnian
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China Univ Geosci, Fac Earth Resources, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Peoples R China
Univ Jos, Fac Nat Sci, Dept Geol, PMB 2084, Jos, Plateau, NigeriaChina Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
Ukaomah, Chima Finnian
Madaki, Agwom Istifanus
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Univ Jos, Fac Nat Sci, Dept Geol, PMB 2084, Jos, Plateau, NigeriaChina Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
机构:
Chinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
Chinese Acad Geol Sci, China Deep Explorat Ctr, SinoProbe Ctr, Beijing 100037, Peoples R ChinaChinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
Wang, Zhihui
Cai, Xiangmin
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Beijing Bur Geol & Mineral Explorat & Dev, Beijing 100195, Peoples R China
Beijing Inst Geol Survey, Beijing 102206, Peoples R ChinaChinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
Cai, Xiangmin
Yan, Jiayong
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Chinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
Chinese Acad Geol Sci, China Deep Explorat Ctr, SinoProbe Ctr, Beijing 100037, Peoples R ChinaChinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
Yan, Jiayong
Wang, Jiming
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Beijing Bur Geol & Mineral Explorat & Dev, Beijing 100195, Peoples R ChinaChinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
Wang, Jiming
Liu, Yu
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Beijing Inst Geol Survey, Beijing 102206, Peoples R ChinaChinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
Liu, Yu
Zhang, Lei
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Beijing Inst Geol Survey, Beijing 102206, Peoples R ChinaChinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China