scholarly journals Scholte-wave tomography for shallow-water marine sediments

2007 ◽  
Vol 168 (2) ◽  
pp. 551-570 ◽  
Author(s):  
Simone Kugler ◽  
Thomas Bohlen ◽  
Thomas Forbriger ◽  
Sascha Bussat ◽  
Gerald Klein
Keyword(s):  
Shallow Water ◽  
Marine Sediments ◽  
Scholte Wave ◽  
Wave Tomography

Variability of Scholte-wave Dispersion in Shallow-water Marine Sediments

2005 ◽  
Vol 10 (2) ◽  
pp. 203-218 ◽  
Author(s):  
S. Kugler ◽  
T. Bohlen ◽  
S. Bussat ◽  
G. Klein
Keyword(s):  
Shallow Water ◽  
Marine Sediments ◽  
Wave Dispersion ◽  
Scholte Wave

scholarly journals Trans-border (east Serbia/west Bulgaria) correlation of the Jurassic sediments: Main Jurassic paleogeographic units

2006 ◽  
pp. 13-17 ◽  
Author(s):  
Platon Tchoumatchenco ◽  
Dragoman Rabrenovic ◽  
Barbara Radulovic ◽  
Vladan Radulovic
Keyword(s):  
Shallow Water ◽  
Marine Sediments ◽  
Deep Water ◽  
Carbonate Platform ◽  
Lower Jurassic ◽  
Black Shales ◽  
Upper Kimmeridgian ◽  
Middle Callovian

In the region across the Serbian/Bulgarian state border, there are individualized 5 Jurassic paleogeographic units (from West to East): (1) the Thracian Massif Unit without Jurassic sediments; (2) the Luznica-Koniavo Unit - partially with Liassic in Grsten facies and with deep water Middle Callovian-Kimmeridgian (p. p) sediments of the type "ammonitico rosso", and Upper Kimmeridgian-Tithonian siliciclastics flysch; (3) The Getic Unit subdivided into two subunits - the Western Getic Sub-Uni - without Lower Jurassic sediments and the Eastern Getic Sub-Unit with Lower Jurassic continental and marine sediments, which are followed in both sub-units by carbonate platform limestones (type Stramberk); (4) the Infra (Sub)-Getic Unit - with relatively deep water Liassic and Dogger sediments (the Dogger of type "black shales with Bossitra alpine") and Middle Callovian-Tithonian of type "ammonitico rosso"; (5) the Danubian Unit - with shallow water Liassic, Dogger and Malm (Miroc-Vrska Cuka Zone, deep water Dogger and Malm (Donjomilanovacko-Novokoritska Zone).

Variability in normal-incidence acoustic response in shallow-water marine sediments

2015 ◽  
Vol 104 ◽  
pp. 92-103 ◽  
Author(s):  
Roger W. Meredith ◽  
Richard W. Faas ◽  
Douglas N. Lambert
Keyword(s):  
Shallow Water ◽  
Marine Sediments ◽  
Normal Incidence ◽  
Acoustic Response

Variability in the acoustic response of shallow-water marine sediments determined by normal-incident 30-kHz and 50-kHz sound

2002 ◽  
Vol 182 (1-2) ◽  
pp. 179-208 ◽  
Author(s):  
Douglas N. Lambert ◽  
Maria T. Kalcic ◽  
Richard W. Faas
Keyword(s):  
Shallow Water ◽  
Marine Sediments ◽  
Acoustic Response

The Yorkshire Dogger: III. Upper Eskdale

1943 ◽  
Vol 80 (6) ◽  
pp. 209-230 ◽  
Author(s):  
R. H. Rastall ◽  
J. E. Hemingway
Keyword(s):  
Shallow Water ◽  
Sea Level ◽  
Marine Sediments ◽  
Sea Water ◽  
Second Phase ◽  
Faunal Assemblage ◽  
Chemical Changes ◽  
Main Series ◽  
Uplift And Erosion ◽  
Shallow Water Sediments

1. A sequence of strata is determined in the Dogger of Upper Eskdale and its tributary valleys. The rocks fall into three main series, which are subdivided into groups.2. The underlying Yeovilian sediments, originally included with the Dogger, are mapped and briefly described. The unconformity between them and the Dogger is emphasized.3. The Dogger is marine throughout but only the oldest yields an adequate faunal assemblage, similar to that of the Glaisdale Oolite Series (upper opalinum). The greater part of the Dogger of this area is therefore younger than that of the Yorkshire Coast.4. Chemical changes in the sea-water caused the deposition of siderite to characterize the earliest phase (Glaisdale Oolite Series). This was succeeded by a phase of dominantly chamosite deposition (the Chamositic Series) followed by a reversion to siderite deposition (the Ajalon Series).5. Earth-movement controlled sedimentation over the area. During the first phase an eastern tilt to the region held the centre and west above or near sea-level, where it received no sediment. The second phase saw general depression with the accumulation of shallow water sediments. This was followed by uplift and erosion when a broad shallow valley was cut. Partial depression then flooded the valley with derived marine sediments.

Carbonate mineralogy and faunal relationship in tropical shallow water marine sediments: Cape Comorin, India

1982 ◽  
Vol 32 (1-2) ◽  
pp. 89-98 ◽  
Author(s):  
N.H. Hashimi ◽  
R.R. Nair ◽  
R.M. Kidwai ◽  
V. Purnachandra Rao
Keyword(s):  
Shallow Water ◽  
Marine Sediments

Seismic imaging of S-wave structures of shallow sediments in the East China Sea using OBN multicomponent Scholte-wave data

Geophysics ◽  
2020 ◽  
Vol 85 (6) ◽  
pp. EN87-EN104
Author(s):  
Yuan Wang ◽  
Zhiwei Li ◽  
Jianhua Geng ◽  
Qingyu You ◽  
Tianyao Hao ◽  
...  
Keyword(s):  
East China Sea ◽  
Marine Sediments ◽  
Seismic Exploration ◽  
East China ◽  
The East China Sea ◽  
S Wave ◽  
Shallow Marine ◽  
China Sea ◽  
Scholte Wave ◽  
Shallow Marine Sediments

The shear-wave (S-wave) structures of shallow marine sediments are important for offshore geotechnical studies, deep crustal S-wave imaging, multicomponent seismic exploration, and underwater acoustics studies. We have applied the multicomponent Scholte-wave analysis technique to an active-source shallow marine seismic profile in the East China Sea. Scholte waves have been excited by shots from a 5450 inch3 air-gun array and their recordings have been conducted at the seafloor using ocean bottom nodes (OBNs). First, we extract the common-receiver gathers (CRGs) and correct for the time drift simultaneously using a forward and inverse fast Fourier transform resampling algorithm. Three CRGs of seismic sensors are used for Scholte-wave analysis. Raw sensor CRGs are rotated to the inline, crossline, and vertical coordinate system. The rotated tilt and roll angle are directed using the inner electric compass log value, and the shot inline azimuth is estimated using the particle motion method. Then, the velocity spectra are calculated from the inline and vertical components using the phase-shift method. Higher Scholte-wave modes dominate on the horizontal components, whereas the stronger fundamental mode dominates on the vertical components. The multicomponent velocity spectrum stacking method is adopted to produce the final dispersion energy image. Up to four modes of dispersion curves are retrieved within the 1.1–4.3 Hz frequency band. The multimode dispersion curve inversion is constructed for imaging the shallow sediments. The results suggest a low [Formula: see text] of 180–650 m/s and few lateral variations within the top 0.5 km of shallow marine sediments in the East China Sea. This model can provide an important reference for offshore geotechnical investigations, especially for OBN multicomponent seismic exploration data processing. The use of OBNs has high feasibility in [Formula: see text] imaging for shallow marine sediments when combined with the Scholte-wave dispersion-curve inversion.

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