Estimation of sediment thickness (including Mesozoic) in the western central part of Kachchh Basin, Gujarat (India) using Magnetotellurics

Patel, Piyushkumar N.; Mohan, Kapil; Chaudhary, Peush

doi:10.1016/j.jappgeo.2020.103943

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…According to the study [29], this dissolution will enlarge the fracture or pore space and eventually produce cavities and caves in the karst rock as a cause of the catastrophic collapse. Then geophysical exploration methods are used to obtain information about the subsurface rock layers' structure and the karst environment's high heterogeneity [12,30]. Here, a combination of ERT and MT methods is used to investigate the presence of karst below the surface.…”

Section: Discussionmentioning

confidence: 99%

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Investigating Land Use and Karst Disaster Mitigation through Geoelectric and Magnetotelluric Methods: A Case Study in Sendang Biru, Malang, Indonesia

Wahid,

Susilo,

Sianturi

et al. 2023

IJDNE

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offers significant tourism and fisheries potential, supported by the nearby Sempu Island Nature Reserve and a Fish Auction Site (FAS). However, the coastal region is prone to karstification, which may be exacerbated by recent land use developments in the surrounding area. This study aims to analyze the rock layer structures and assess the vulnerability of karst land use to the ongoing karstification process. Electrical Resistivity Tomography (ERT) and Magnetotelluric (MT) methods were employed to investigate karst land within the study area. The findings revealed the presence of karst aquifers in Zone A, extending to a depth of 250 m, characterized by low resistivity values. In Zone B, karst limestone deformation was observed at several locations due to karstification, with moderate resistivity values detected at a depth of 300 m on the surface, indicating vulnerability to karst disasters. High resistivity values dominated areas with massive karst limestone, ranging from the surface to a depth of 400 m. Furthermore, it was found that a significant portion of karst land is utilized for settlements, plantations, and rice paddies, potentially disrupting the karst ecosystem due to household, plantation, and agricultural waste. This study highlights the importance of understanding the impact of land use on karst vulnerability and informs mitigation strategies for sustainable development in the Sendang Biru region.

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Section: Discussionmentioning

confidence: 99%

“…The paper [12] unveiled three subsurface rock layers correlating with karst lithology, while the study [13] reported void collapses due to dissolution, causing overlying layer collapse and artesian water-holding features.…”

Section: Introductionmentioning

confidence: 98%

Investigating Land Use and Karst Disaster Mitigation through Geoelectric and Magnetotelluric Methods: A Case Study in Sendang Biru, Malang, Indonesia

Wahid,

Susilo,

Sianturi

et al. 2023

IJDNE

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“…Rao et al (2014) conducted MT surveys and imaged two depo-centres: Banni half-graben bordered on the south by the KMF and the Vinjhan depression formed due to subsidence between the VF and KHF further south. Mohan et al (2015; and Patel et al (2020) carried out an MT survey and inferred that the KMF is a nearly vertically dipping fault up to 7−8 km depth, below which it acts as an ∼45°north-dipping fault. In the present study, the GPR investigations in the Amrapar-Sikra segment (segment VI) also revealed near vertical northdipping KMF.…”

Section: Discussionmentioning

confidence: 99%

“…(2015; 2018) and Patel et al . (2020) carried out an MT survey and inferred that the KMF is a nearly vertically dipping fault up to 7−8 km depth, below which it acts as an ∼45° north‐dipping fault. In the present study, the GPR investigations in the Amrapar–Sikra segment (segment VI) also revealed near vertical north‐dipping KMF.…”

Section: Discussionmentioning

confidence: 99%

Mapping the near‐surface trace of the seismically active Kachchh Mainland Fault and its lateral extension in the blind zone, Western India

Maurya

Chowksey

Shaikh

et al. 2022

Near Surface Geophysics

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The W-WNW-striking Kachchh Mainland Fault (KMF) is the largest intra-basinal fault in the Kachchh Rift Basin (KRB) located at the western continental margin of the Indian plate, and is responsible for several historic earthquakes, including the 2001 Bhuj earthquake and the 1956 Anjar earthquake. The objective of the study is to constrain the precise location and near-surface characteristics of the KMF using field and ground penetrating radar (GPR) studies. Efforts were also made to ascertain and map the eastward continuity of the KMF. The fault has a prominent geomorphic expression up to the east of Devisar, where the KMF scarp finally dies out. The KMF marks the lithotectonic contact between Mesozoic rocks in the south and Tertiary rocks in the north. The segmented nature of the KMF has been previously attributed to transverse faults, complex deformation zones and heterogeneous assemblages of unconformable Quaternary deposits. Eight survey sites between Nirona and Sikra were chosen for near-surface investigation of KMF using GPR. Comparatively, high-amplitude radar reflections were received from well-compacted sand-and shale-rich Mesozoic rocks, whereas low-amplitude weak reflections were observed from softer and clay-rich Tertiary rocks. In the upper section of the GPR profiles, Quaternary deposits display lowto moderate-amplitude semi-continuous to wavy reflections. The traceable length of the KMF has been extended eastward by ∼20 km through the current study, which is considered a blind zone as feeble surficial evidence is present, but the fault trace is confirmed near the surface using GPR. The eastern part of the KMF is inferred to be a near-vertical north-dipping normal fault based on GPR data analysis. The tendency of the KMF to transform into a reverse fault in the vicinity of the intersection with transverse faults implies zones of relatively higher stress accumulation that might activate and trigger devastating earthquakes in the future.

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Building tectonic framework of a blind active fault zone using field and ground-penetrating radar data

Shaikh

Patidar

Maurya

et al. 2022

Journal of Structural Geology

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Estimation of sediment thickness (including Mesozoic) in the western central part of Kachchh Basin, Gujarat (India) using Magnetotellurics

Cited by 6 publications

References 19 publications

Investigating Land Use and Karst Disaster Mitigation through Geoelectric and Magnetotelluric Methods: A Case Study in Sendang Biru, Malang, Indonesia

Investigating Land Use and Karst Disaster Mitigation through Geoelectric and Magnetotelluric Methods: A Case Study in Sendang Biru, Malang, Indonesia

Mapping the near‐surface trace of the seismically active Kachchh Mainland Fault and its lateral extension in the blind zone, Western India

Building tectonic framework of a blind active fault zone using field and ground-penetrating radar data

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