Self-Organizing Seafloor mapping of the Tjörnes Fracture Zone / Iceland

The Tjörnes Fracture Zone (TFZ) is a transform zone in the North Atlantic separating the Northern Volcanic Zone (NVZ) of Iceland from Kolbeinsey Ridge. The area exposes active volcanism and hydrothermalism and is subject to strong earthquakes. A reflection seismic survey has been conducted. It was c...

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Bibliographic Details
Main Author: Riedel, Carsten
Other Authors: Milkereit, B., Rabbel, W.
Format: Doctoral or Postdoctoral Thesis
Language:English
Published: 2001
Subjects:
ddc:550
thesis
Tjörnes-Bruchzone
Meeresboden
Geodynamik
Tjörnes
Iceland
Neural Networks
AVO
reflectivity
roughness
Volcanology
seafloor
Kolbeinsey
magma chamber
Kolbeinsey Ridge
North Atlantic
Online Access:https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-5009
https://macau.uni-kiel.de/receive/diss_mods_00000500
https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00000500/d500.pdf
Description
Summary:The Tjörnes Fracture Zone (TFZ) is a transform zone in the North Atlantic separating the Northern Volcanic Zone (NVZ) of Iceland from Kolbeinsey Ridge. The area exposes active volcanism and hydrothermalism and is subject to strong earthquakes. A reflection seismic survey has been conducted. It was complimented by gasgeochemical measurements, submersible diving and geological sampling of the seafloor. During the first part of the thesis a method is developped to detect the lithology from physical properties calculated from the acquired seismic data. The second part compares the results of the new method with the other observations and unravels the geological setting of the TFZ, in particular in Skjalfandi Bay. The final result is a map of the seafloor lithology as indicated by parameters such as reflectivity and roughness and environmental factors such as morphology, structure and sampled seafloor lithology within the Tjörnes Fracture Zone region north of Iceland.

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