Reflectivity of a Proterozoic shield: Examples from BABEL seismic profiles across Fennoscandia

The main goal of the research is to analyze the global warming impact on Urmia lake vulnerabiliy and hazard. By the study of topographic maps, satellite images and field research, the various types of coasts were identified: mud flats, salt marshes, sandy or cliffed coasts, and islands. Moreover the interpretation of seismic profiles, has led to recognize so important morphological features in the lake bed, such as: erosive channels, colos, mud volcanoes, the raised sandy masses and under water mounts. The main results illustrate the variable morphological behavior of Urmia Lake in different parts of the lake.

Download Full-text

Modelling of thermal mode for siberian craton by inversion of seismic profiles "Rift" and "Meteorite"

Vestnik Otdelenia nauk o Zemle RAN ◽

10.2205/2011nz000210 ◽

2011 ◽

Vol 3 (Special Issue) ◽

pp. 1-7

Author(s):

A. A. Prokofyev ◽

O. L. Kuskov ◽

V. A. Kronrod

Keyword(s):

Siberian Craton ◽

Thermal Mode ◽

Seismic Profiles

Download Full-text

Comparison of Quantitative Morphology of Layered and Arbitrary Patterns: Contrary to Visual Perception, Binary Arbitrary Patterns Are Layered from a Structural Point of View

Applied Sciences ◽

10.3390/app11146300 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6300

Author(s):

Igor Smolyar ◽

Daniel Smolyar

Keyword(s):

Boolean Function ◽

Layer Structure ◽

Central Element ◽

Morphological Characteristics ◽

Building Blocks ◽

Point Of View ◽

Living Systems ◽

Seismic Profiles ◽

Contour Maps ◽

Anisotropic Layers

Patterns found among both living systems, such as fish scales, bones, and tree rings, and non-living systems, such as terrestrial and extraterrestrial dunes, microstructures of alloys, and geological seismic profiles, are comprised of anisotropic layers of different thicknesses and lengths. These layered patterns form a record of internal and external factors that regulate pattern formation in their various systems, making it potentially possible to recognize events in the formation history of these systems. In our previous work, we developed an empirical model (EM) of anisotropic layered patterns using an N-partite graph, denoted as G(N), and a Boolean function to formalize the layer structure. The concept of isotropic and anisotropic layers was presented and described in terms of the G(N) and Boolean function. The central element of the present work is the justification that arbitrary binary patterns are made up of such layers. It has been shown that within the frame of the proposed model, it is the isotropic and anisotropic layers themselves that are the building blocks of binary layered and arbitrary patterns; pixels play no role. This is why the EM can be used to describe the morphological characteristics of such patterns. We present the parameters disorder of layer structure, disorder of layer size, and pattern complexity to describe the degree of deviation of the structure and size of an arbitrary anisotropic pattern being studied from the structure and size of a layered isotropic analog. Experiments with arbitrary patterns, such as regular geometric figures, convex and concave polygons, contour maps, the shape of island coastlines, river meanders, historic texts, and artistic drawings are presented to illustrate the spectrum of problems that it may be possible to solve by applying the EM. The differences and similarities between the proposed and existing morphological characteristics of patterns has been discussed, as well as the pros and cons of the suggested method.

Download Full-text

Superimposed Variscan, Caledonian and Proterozoic features inferred from deep seismic profiles recorded between southern Ireland, southwestern Britain and western France

Tectonophysics ◽

10.1016/0040-1951(90)90272-a ◽

1990 ◽

Vol 177 (1-3) ◽

pp. 15-37 ◽

Cited By ~ 20

Author(s):

C. Bois ◽

J.-P. Lefort ◽

B. Le Gall ◽

J.-C. Sibuet ◽

O. Gariel ◽

...

Keyword(s):

Seismic Profiles

Download Full-text

Short-period surface wave dispersion: noise studies and Q along seismic profiles in southern Sweden

Tectonophysics ◽

10.1016/0040-1951(94)90160-0 ◽

1994 ◽

Vol 237 (1-2) ◽

pp. 87-103 ◽

Cited By ~ 2

Author(s):

K. Åström ◽

C.-E. Lund

Keyword(s):

Surface Wave ◽

Wave Dispersion ◽

Southern Sweden ◽

Seismic Profiles ◽

Surface Wave Dispersion ◽

Short Period

Download Full-text

Incomplete AVO near salt structures

Geophysics ◽

10.1190/1.1443268 ◽

1992 ◽

Vol 57 (4) ◽

pp. 543-553 ◽

Cited By ~ 4

Author(s):

Christopher P. Ross

Keyword(s):

Seismic Profiles ◽

Spectral Modeling ◽

Signal Degradation ◽

Amplitude Versus Offset ◽

Bright Spots ◽

Close Proximity ◽

Pseudo Spectral ◽

Amplitude Versus ◽

Structure Class ◽

Made In

Amplitude versus offset (AVO) measurements for deep hydrocarbon‐bearing sands can be compromised when made in close proximity to a shallow salt piercement structure. Anomalous responses are observed, particularly on low acoustic impedance bright spots. CMP data from key seismic profiles traversing the bright spots do not show the expected Class 3 offset responses. On these CMPs, significant decrease of far trace energy is observed. CMP data from other seismic profiles off‐structure do exhibit the Class 3 offset responses, implying that structural complications may be interfering with the offset response. A synthetic AVO gather was generated using well log data, which supports the off‐structure Class 3 responses, further reinforcing the concept of structurally‐biased AVO responses. Acoustic, pseudo‐spectral modeling of the structure substantiates the misleading AVO response. Pseudo‐spectral modeling results suggest that signal degradation observed on the far offsets is caused by wavefield refraction—a shadow zone, where the known hydrocarbon‐bearing sands are not completely illuminated. Such shadow zones obscure the correct AVO response, which may have bearing on exploration and development.

Download Full-text