Seismic imaging at the cross-roads: Active, passive, exploration and solid Earth

Rawlinson, Nicholas; Stephenson, Randell; Carbonell, Ramón

doi:10.1016/j.tecto.2017.07.022

Cited by 5 publications

(1 citation statement)

References 123 publications

(111 reference statements)

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“…that can be transported by off-road 4×4 vehicle or helicopter to remote locations that are not on the maintained road network (e.g. Rawlinson et al 2017). Several passive-source seismic techniques currently exist to study the near-surface structure, such as the horizontal to vertical spectral ratio (commonly referred to as HVSR), spatial autocorrelation coefficient method, receiver functions (RFs) and using the ambient seismic wavefield (e.g.…”

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Characterizing the cover across South Australia: a simple passive-seismic method for estimating sedimentary thickness

Agrawal

Eakin

O’Donnell³

2022

Geophysical Journal International

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Summary A blanket of sedimentary and regolith material covers approximately three-quarters of the Australian continent, obscuring the crustal geology below and potential mineral resources within. Sedimentary basins also trap seismic energy increasing seismic hazard and generating noisy seismograms that make determining deeper crustal and lithospheric structure more challenging. The most fundamental question that can first be asked in addressing these challenges is how thick are the sediments? Borehole drilling and active seismic experiments using a controlled seismic source (e.g. vibroseis) provide excellent constraints, but they are limited in geographical coverage due to their expense, especially when operating in remote areas. On the other hand, passive-seismic experiments that involve the deployment of seismic receivers only (i.e. seismometers) are relatively low-cost and portable, providing a practical alternative for initial surveys. Here we utilize receiver functions obtained for both temporary and permanent seismic stations in South Australia, covering regions with a diverse sediment distribution. We present a straightforward method to determine the basement depth based on the arrival time of the P-converted-to-S phase generated at the boundary between the crustal basement and sedimentary strata above. Utilizing the available borehole data, we establish a simple predictive relationship between Ps arrival time and the basement depth, which could then be applied to other sedimentary basins with some consideration. The method is found to work best for Phanerozoic sediments and offers a way to determine the sediment-basement interface in unexplored areas requiring only temporary seismic stations deployed for < 6 months.

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confidence: 99%

Characterizing the cover across South Australia: a simple passive-seismic method for estimating sedimentary thickness

Agrawal

Eakin

O’Donnell³

2022

Geophysical Journal International

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Characterizing the cover across South Australia: A simple passive-seismic method for estimating sedimentary thickness

Agrawal

Eakin

O’Donnell³

2022

Preprint

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A blanket of sedimentary and regolith material covers approximately three-quarters of the Australian continent, obscuring the crustal geology below and potential mineral resources within. Sedimentary basins also trap seismic energy increasing seismic hazard and generating noisy seismograms that make determining deeper crustal and lithospheric structure more challenging. The most fundamental question that can first be asked in addressing these challenges is how thick are the sediments? Borehole drilling and active seismic experiments using a controlled seismic source (e.g. vibroseis) provide excellent constraints, but they are limited in geographical coverage due to their expense, especially when operating in remote areas. On the other hand, passive-seismic experiments that involve the deployment of seismic receivers only (i.e. seismometers) are relatively low-cost and portable, providing a practical alternative for initial surveys. Here we utilize receiver functions obtained for both temporary and permanent seismic stations in South Australia, covering regions with a diverse sediment distribution. We present a straightforward method to determine the basement depth based on the arrival time of the P-converted-to-S phase generated at the boundary between the crustal basement and sedimentary strata above. Utilizing the available borehole data, we establish a simple predictive relationship between Ps arrival time and the basement depth, which could then be applied to other sedimentary basins with some consideration. The method is found to work best for Phanerozoic sediments and offers a way to determine the sediment-basement interface in unexplored areas requiring only temporary seismic stations deployed for < 6 months.

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Deep Seismic Reflection and Refraction Profiling

Chowdhury¹

2019

Encyclopedia of Solid Earth Geophysics

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DefinitionDeep Seismic Reflection and Refraction Profiling Classically, multichannel recording, along a measurement line, of (mostly) seismic P-waves, artificially generated using large energy sources, after these have traveled deep thru the earth's crust (and upper mantle). Later developments include multicomponent recording enabling analysis of shear waves. Deep reflection profiling is mostly done using vibrators (on land) or air guns (in water) at near-vertical distances (8-12 km) to image the structure of the crust and upper mantle. Wide-angle reflection/refraction profiling uses large explosions and recording distances (200-300 km), primarily to obtain velocity information down to the upper mantle. Synonyms ▶ Active source seismology; ▶ Controlled source seismology; ▶ Deep seismic sounding; ▶ Explosion seismology; ▶ Wide-angle reflection/refraction profiling Notational NotesBelow, all capitals (e.g., DSRRP) will be used for acronyms and italicized phrases within double quotes (e.g., "Seismic Noise") will refer to articles elsewhere in this volume.

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Seismic imaging at the cross-roads: Active, passive, exploration and solid Earth

Cited by 5 publications

References 123 publications

Characterizing the cover across South Australia: a simple passive-seismic method for estimating sedimentary thickness

Characterizing the cover across South Australia: a simple passive-seismic method for estimating sedimentary thickness

Characterizing the cover across South Australia: A simple passive-seismic method for estimating sedimentary thickness

Deep Seismic Reflection and Refraction Profiling

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