From low to high fidelity geophysics: 3D multi-component shallow
seismic surveying in the Lions' Harbour of Miletus (Turkey)
S. Wölz. Christian-Albrechts-Universität Kiel, Kiel, Germany, (2003)
Abstract
In this thesis a new high resolution 3-D multi-component seismic technique
for shallow acquisition and interpretation was developed and evaluated.
Unexplained linear and parallel magnetic anomalies, observed in the
Lions' Harbour of Miletus (Turkey), correlate with the ancient street
grid and raised the question if they could be related to quay wall
or harbour foundations. Two 3-D multi-component refraction surveys
were carried out in the alluvial sedimentary environment of this
archaeological site, covering the magnetic structures. The use of
Galperin geophones and the excitation of waves in three different
directions led to 9-C datasets. Recorded wavefields show complex
dynamic and kinematic behavior. Due to acquisition geometry and wavefield
characteristics different phases of the wavefield intermix. Three
different approaches to wavefield separation were defined and investigated,
comprising a simple wavefield component rotation to geometric ray
direction, calculation of curl and divergence at the surface and
rotation into the ray coordinate system (''slowness projection'').
The latter provides the best results for refracted arrivals. Extending
the delay-time method to the 3-D case maps coherent basement structures
on the meter-scale. The resulting model, a depth function of the
refracting limestone horizon, was verified in depth by coring information
and shows a minimum rms-error of 0.44 m with an average refractor
depth of 10.5 m. Supplemental tomographic inversion results in a
refined model showing surface velocity anomalies and a prominent
high velocity zone in the refractor. The Milesian Lions' Harbour
basin at this location is shallow enough and provides appropriate
ground to found moles on solid rock. urn:nbn:de:gbv:8-diss-9370
%0 Thesis
%1 woelz:2003
%A Wölz, Susanne
%C Kiel, Germany
%D 2003
%K geophysics seismics
%T From low to high fidelity geophysics: 3D multi-component shallow
seismic surveying in the Lions' Harbour of Miletus (Turkey)
%U http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-9370
%X In this thesis a new high resolution 3-D multi-component seismic technique
for shallow acquisition and interpretation was developed and evaluated.
Unexplained linear and parallel magnetic anomalies, observed in the
Lions' Harbour of Miletus (Turkey), correlate with the ancient street
grid and raised the question if they could be related to quay wall
or harbour foundations. Two 3-D multi-component refraction surveys
were carried out in the alluvial sedimentary environment of this
archaeological site, covering the magnetic structures. The use of
Galperin geophones and the excitation of waves in three different
directions led to 9-C datasets. Recorded wavefields show complex
dynamic and kinematic behavior. Due to acquisition geometry and wavefield
characteristics different phases of the wavefield intermix. Three
different approaches to wavefield separation were defined and investigated,
comprising a simple wavefield component rotation to geometric ray
direction, calculation of curl and divergence at the surface and
rotation into the ray coordinate system (''slowness projection'').
The latter provides the best results for refracted arrivals. Extending
the delay-time method to the 3-D case maps coherent basement structures
on the meter-scale. The resulting model, a depth function of the
refracting limestone horizon, was verified in depth by coring information
and shows a minimum rms-error of 0.44 m with an average refractor
depth of 10.5 m. Supplemental tomographic inversion results in a
refined model showing surface velocity anomalies and a prominent
high velocity zone in the refractor. The Milesian Lions' Harbour
basin at this location is shallow enough and provides appropriate
ground to found moles on solid rock. urn:nbn:de:gbv:8-diss-9370
@phdthesis{woelz:2003,
abstract = {In this thesis a new high resolution 3-D multi-component seismic technique
for shallow acquisition and interpretation was developed and evaluated.
Unexplained linear and parallel magnetic anomalies, observed in the
Lions' Harbour of Miletus (Turkey), correlate with the ancient street
grid and raised the question if they could be related to quay wall
or harbour foundations. Two 3-D multi-component refraction surveys
were carried out in the alluvial sedimentary environment of this
archaeological site, covering the magnetic structures. The use of
Galperin geophones and the excitation of waves in three different
directions led to 9-C datasets. Recorded wavefields show complex
dynamic and kinematic behavior. Due to acquisition geometry and wavefield
characteristics different phases of the wavefield intermix. Three
different approaches to wavefield separation were defined and investigated,
comprising a simple wavefield component rotation to geometric ray
direction, calculation of curl and divergence at the surface and
rotation into the ray coordinate system (''slowness projection'').
The latter provides the best results for refracted arrivals. Extending
the delay-time method to the 3-D case maps coherent basement structures
on the meter-scale. The resulting model, a depth function of the
refracting limestone horizon, was verified in depth by coring information
and shows a minimum rms-error of 0.44 m with an average refractor
depth of 10.5 m. Supplemental tomographic inversion results in a
refined model showing surface velocity anomalies and a prominent
high velocity zone in the refractor. The Milesian Lions' Harbour
basin at this location is shallow enough and provides appropriate
ground to found moles on solid rock. urn:nbn:de:gbv:8-diss-9370},
added-at = {2012-09-01T13:08:21.000+0200},
address = {Kiel, Germany},
author = {W\"{o}lz, Susanne},
biburl = {https://www.bibsonomy.org/bibtex/2772e8f8573e4749e107bf431fa980404/nilsma},
interhash = {41768e334a676a02ed30f3c0e5a7b011},
intrahash = {772e8f8573e4749e107bf431fa980404},
keywords = {geophysics seismics},
school = {Christian-Albrechts-Universit\"{a}t Kiel},
timestamp = {2021-02-09T13:27:11.000+0100},
title = {From low to high fidelity geophysics: 3D multi-component shallow
seismic surveying in the Lions' Harbour of Miletus (Turkey)},
url = {http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-9370},
year = 2003
}