Subsurface profiling of granite pluton using microtremor method: southern Aravalli, Gujarat, India

Joshi, Aditya U.; Sant, Dhananjay A.; Parvez, Imtiyaz A.; Rangarajan, Govindan; Limaye, Manoj A.; Mukherjee, Soumyajit; Charola, Mitesh J.; Bhatt, Meghnath N.; Mistry, Sagar P.

doi:10.1007/s00531-017-1482-9

Cited by 13 publications

(7 citation statements)

References 56 publications

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“…Microtremor measurements carried out at 32 sites along D 1 axial trace of Narukot Dome and its western extension by Joshi et al (2018) is helpful to identify two distinct rheological boundaries based on frequency ranges determined in the terrain. These rheological boundaries include (i) the juxtaposed Champaner metasediment over granite (C-Gr) boundary and (ii) intercalated phyllite and quartzite (P-Qr) boundary.…”

Section: Discussionmentioning

confidence: 99%

“…However, the area under investigation consists of calc-silicate rock of Meso-Proterozoic age enveloped by younger plutonic intrusive, i.e., Jambughoda granite (Goyal et al 1997). Jambughoda granite is the part of Godhra granite, emplaced along a major NW-SE Precambrian trend (Mamtani and Greiling 2005;Joshi et al 2018).…”

Section: Geological and Structural Set-up Of The Study Areamentioning

confidence: 99%

“…D 2 , a localized phase of deformation associated with shortening of the earlier folds from the eastern margin of the Champaner Group signifying broad open folds with N-S striking axial traces developed on regional limbs of D 1 folds (Jambusaria and Merh 1967;Gopinath et al 1977;Srikarni and Das 1996;Gupta et al 1997;Karanth and Das 2000;Mamtani and Greiling 2005;Joshi and Limaye 2014;Patel et al 2016). There also exist signatures of D 1 axial planar strike slip faults and shear zones across the Champaner Group (Joshi et al 2018). Due to the heterogeneity in terms of manganiferous beds and structure, a suggestion has been made that the Champaner Group be described as a sequence younger to both Aravalli and Delhi Supergroup (Roy 1988).…”

Section: Introductionmentioning

confidence: 99%

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Rootless calc-silicate folds in granite: An implication towards syn- to post-plutonic emplacement

Joshi

Limaye

2018

J Earth Syst Sci

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Deformation of the Champaner Group of rocks that form a part of Southern Aravalli Mountain Belt, western India, occurred during the Grenville orogeny (ca. 1400-935 Ma). Two phases of deformation are recorded: D 1 , persistent throughout the group and characterised by westerly plunging tight isoclinal folds and D 2 , a localized phase of deformation associated with shortening of the earlier folds from the eastern margin. Both the phases of deformation are in association with the syn-tectonically emplaced Godhra granite. The present work records rootless calc-silicate folds in granite belonging to the older formation, located at the eastern fringe of the Champaner Group. Field evidences suggest superimposition of Type 2 interference pattern trending NE-SW over rootless Type 0 of varying trends from NW-SE to N-S. The superposed pattern obtained from the field study differs in terms of structural trends with the neighbouring Precambrian stratigraphic units. These stratigraphic units include the Champaner Group to which the study area belongs, the Kadana Formation of the Lunavada Group and Pre-Chamapaner Gneissic Complex. Rootless character of folds found within the study area imply syn-post plutonic emplacement of Godhra granite.

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Section: Discussionmentioning

confidence: 99%

Section: Geological and Structural Set-up Of The Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rootless calc-silicate folds in granite: An implication towards syn- to post-plutonic emplacement

Joshi

Limaye

2018

J Earth Syst Sci

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“…11 Comparison between the obtained frequency-thickness relationships for the Iška alluvial fan and the Ljubljana Moor basin. Parolai et al (2002) Cologne, Germany 108 -1.5510 Hinzen et al (2004) Lower-Rhine East, Germany 137 -1.1900 Garcia-Jerez et al (2006) Zafarraya Basin, Spain 194.6 -1.1400 Motamed et al (2006) Bam, Iran 135.19 -1-9790 Gosar and Lenart (2010) Ljubljana Moor, Slovenia 105.53 -1.2500 Mascandolla et al (2019) Po Plain, Italy 098 -1.1700 Poggi et al (2012) Lucerne, Switzerland 158.54 -2.4500 D' Amico et al (2008) Florence, Italy 140 -1.1720 Birgören et al (2009) Istanbul, Turkey 150.99 -1.1531 Del'Monaco et al (2013) L'Aquila, Italy 053.461 -1.0100 Dinesh et al (2010) Bangalore, India 058.3 -0.9500 Maresca and Berrino (2016) Volturara Irpina, Italy 129 -1.3800 Özalaybey et al (2011) Izmit Bay, Turkey 141 -1.2700 Paudyal et al (2013) Kathmandu Basin, Nepal 146.01 -1.2079 Sukumaran et al (2011) Narmada Valley, India 102.1 -1.4700 Joshi et al (2018) Aravalli, India 056.8 -1.0000 Sant et al (2017) Banni Plains, India 110.18 -1.9700 Liang et al (2018) Pearl River Delta, China 055 -1.0200 Pugin et al (2013) Ottawa, Canada 064. 98 -1.1980 This study Iška alluvial fan, Slovenia 202.97 -1.1390 therefore reveals in general a small variation of b values, and a rather large range of a values, which again implies that the parameter a is characteristic for certain areas.…”

Section: Comparison Of the Obtained Frequency-thickness Relationship mentioning

confidence: 99%

Mapping the thickness of Quaternary sediments in the Iska alluvial fan (central Slovenia) using microtremor method

Rupar¹

2020

Acta Geodynamica Et Geomaterialia

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Resonance frequencies of unconsolidated sediments of the Iška alluvial fan (Ljubljana Moor basin) were derived using microtremor method. Free-field measurements were conducted in a grid with point spacing of approximately 250 m. The sediments frequency-thickness relationship, h = 202.97 f-1.139 , was obtained on the basis of 107 microtremor measurements, six existing boreholes that reached the Pre-Quaternary basement and two seismic reflection profiles. The reliance of the obtained relationship was evaluated with the R 2 coefficient, which shows a very good level of determination. The resonance frequency map reveals the existence of an N-S oriented deeper buried valley (maximum depth 119 m) in the Western part of the alluvial fan. The microtremor HVSR amplitude map does not show any specific spatial distribution pattern, with the exception of a relatively narrow band of low amplitudes located north of Iška vas. This is probably related to an area of severely fractured bedrock along the Mišji Dol fault. Map of the Quaternary sediment thickness and map of the Pre-Quaternary basement topography were constructed on the basis of the established relationship. The basement topography map shows rather steep western slopes of the buried valley down to deepest part, followed by a gradually ascending basement towards the Eastern part of the fan. The comparison of the obtained parameters a and b in frequency-thickness relationship with other sedimentary basins around the world reveals a small variation of b values, and a rather large range of a values, which implies that the parameter a is characteristic for certain geological areas. The results of this research will find use in constructing more accurate hydrogeological models and for assessment of possible sediments-structure resonance effects in seismic microzonation.

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“…Natarajan and Rajendran 25,26 used the HVSR technique to estimate site response of Kachchh rift basin over the meizoseismal area of the 2001, M w 7.6, Bhuj (NW India) earthquake, and determined that site effects were not significant during the 2001 earthquake damage observed in Bhuj. Recently, Sant et al 27 have used the microtremor method for subsurface profiling along Banni Plains and bounding faults in Kachchh, Western India; and Joshi et al 28 have used the microtremor method for subsurface profiling of granite pluton in southern Aravalli, Gujarat, India. But, no such experimental study has been conducted for the Indo-Gangetic region.…”

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confidence: 99%

Establishing Empirical Correlation between Sediment Thickness and Resonant Frequency using HVSR for the Indo-Gangetic Plain

Anbazhagan¹,

Boobalan²,

Shaivan³

2019

Current Science

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In this study, microtremor survey was carried out at 31 locations of Indo-Gangetic Plains (IGP) using a pair of portable three-component short-period seismometers (Guralp CMG-6T-1) and Kelunji Echo Pro digital data acquisition system. The acquired raw data was processed to obtain the average H/V ratio of the ambient vibration spectrum. The frequency corresponding to the first peak of the average H/V spectrum was taken as resonant frequency of that particular site. A comparison was made between the resonant frequencies obtained from peak of the H/V spectrum with those obtained using the source-receiver function from previously published work. The results were in good agreement with each other. An empirical equation has been established for the IGP by relating resonance frequency with sediment thickness, using available data from nearby boreholes drilled up to bedrock. The empirical equation was compared with other equations available for deep soil sites, i.e. sites with soil thickness more than 750 m. Further, a combined equation was developed for the digitized data taken from previously published works of deep soil sites. Finally, it has been found that the regionspecific equation gives better estimate of sediment thickness than the other empirical equations; but in absence of such a region-specific equation, the proposed combined equation can be used for a quick preliminary assessment of sediment thickness of a deep soil region.

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Subsurface profiling of granite pluton using microtremor method: southern Aravalli, Gujarat, India

Cited by 13 publications

References 56 publications

Rootless calc-silicate folds in granite: An implication towards syn- to post-plutonic emplacement

Rootless calc-silicate folds in granite: An implication towards syn- to post-plutonic emplacement

Mapping the thickness of Quaternary sediments in the Iska alluvial fan (central Slovenia) using microtremor method

Establishing Empirical Correlation between Sediment Thickness and Resonant Frequency using HVSR for the Indo-Gangetic Plain

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