Marine full tensor gravity gradiometry data analysis and Euler deconvolution

• Main Author: Roth, Matthias
• Format: Other/Unknown Material
• Language: English
• Published: 2009
• Subjects: Datenanalyse; 550; Euler Deconvolution; Schweregradiometrie; Schweregradiententensor; Massenanomalie; gravity gradiometry; gravity gradient tensor; data analysis; mass anomaly; Faroe Islands
• Online Access: https://doi.org/10.18419/opus-3814; http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-47044; http://elib.uni-stuttgart.de/handle/11682/3831

The Euler Deconvolution is a standard tool of the geophysical prospection. It is a semi automated process and supports the interpretation of magnet field data, gravimetry data or gravity gradiometry data. It is used to estimate the location of the source of a magnet field anomaly or a gravity field anomaly. The obtained location is equivalent to a potential resource (e. g. petroleum, gas, ore, salt etc.) Although gravimetry data or gravity gradiometry data are used in geodesy frequently this method did not attract much interest in this branch of science. For this study thesis a real marine full tensor gravity gradiometry data set is given. The data set was recorded by Bell Geospace. The gravity gradiometer was mounted on a ship. The measurement area lies between the Shetland Islands and the Faroe Islands. This area was chosen for the measurements because of the basalt formations there. For geodesists the accuracy of data is of great interest. Therefore in a first step these data is run through an accuracy analysis. After the introduction of the theory of the Euler Deconvolution and its testing on synthetic data the Euler Deconvolution is carried out on the data set. The analysis of synthetic data shows that the Euler Deconvolution is suited to detect the location of a mass anomaly. If multiple mass anomalies are to be detected these mass anomalies must have a certain distance for this method to function reliably. If the distance between mass anomalies is too small the Euler Deconvolution tends to give false mass locations. In spite of the big noise on the gravity gradient data the Euler Deconvolution still shows to be useful on the real data set. Die Euler-Dekonvolution ist ein Standardwerkzeug der geophysikalischen Prospektion. Sie ist ein halbautomatischer Prozess und unterstützt die Interpretation von Magnetfeld-, Gravimetrie- oder Schweregradiometriedaten. Mit ihrer Hilfe ist es möglich, die Quelle einer Magnetfeld- oder Gravitationsfeldanomalie zu lokalisieren. Der dabei erhaltene Ort entspricht einem ...