Resumé
Paleokarst collapse-breccias are known to significantly influence fluid flow in carbonate rocks in aquifers and hydrocarbon reservoirs. However, few 3D studies of breccia-pipe properties exist and more detailed knowledge about these structures can help to improve present-day fluid-flow models. To investigate collapse breccias which crop out on the Wordikammen plateau (Spitzbergen), we performed both extended 2-D and 3-D georadar measurements achieving 40 m penetration. From the grid of 2-D sections we determined the spatial distribution and sizes of collapse bodies characterized by complex diffraction patterns interrupting bedding-related continuous reflections. Images of the 3-D survey enabled us to determine accurately the actual shape of one breccia pipe. Comparison with electrical resistance tomography (ERT) shows that the breccia pipes coincide with regions of both anomalously-high and -low resistivities. This may indicate that breccia pipes can act as flowpaths for water in the permafrost
Originalsprog | Engelsk |
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Titel | Proceedings of the 12th International Conference on Ground Penetrating Radar, GPR08 : 15-19 June 2008, Birmingham, UK |
Redaktører | C.D.F. Rogers, R.J. Chignell |
Udgivelsessted | Birmingham |
Forlag | University of Birmingham |
Antal sider | 6 |
Status | Udgivet - 2008 |
Udgivet eksternt | Ja |
Begivenhed | 12th International Conference on Ground Penetrating Radar - Birmingham, United Kingdom Varighed: 16 jun. 2008 → 19 jun. 2008 |
Konference
Konference | 12th International Conference on Ground Penetrating Radar |
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By | Birmingham, United Kingdom |
Periode | 16/06/08 → 19/06/08 |
Programområde
- Programområde 3: Energiressourcer