Details
| Translated title of the contribution | Three-dimensional mapping of Quaternary sediments improved by airborne electromagnetics in the case of the Quakenbrück Basin, Northern Germany |
|---|---|
| Original language | German |
| Pages (from-to) | 369-384 |
| Number of pages | 16 |
| Journal | Zeitschrift der Deutschen Gesellschaft fur Geowissenschaften |
| Volume | 164 |
| Issue number | 2 |
| Publication status | Published - Jun 2013 |
Abstract
The increasing demand on using the subsurface raises the call for a better understanding of the depositional architecture. In this study, we demonstrate how 3D subsurface models can be improved by airborne electromagnetic data. The study area is located in the Pleistocene Quakenbrück Basin in Northern Germany. This overdeepened basin is fronted by a push moraine ridge and fi lled with Middle Pleistocene (Saalian) to Holocene sediments known from a limited amount of borehole data. In 2009, this area was target of an aeroelectromagnetic survey with the SkyTEM system. For the interpretation of SkyTEM resistivity data, a relation between grain size and resistivity was derived using resistivity borehole logs from the larger study area. The analysis of the data showed a positive correlation as resistivity increases with increasing grain size and permeability. Each stratigraphic layer was then modelled with the commercial software GOCAD® based on the geological and geophysical information as each sediment layer is characterised by a specifi c resistivity in the SkyTEM data. Our results demonstrate that by integrating airborne electromagnetic data into geological 3D models, the distribution of stratigraphic units can be modelled with higher lateral resolution due to higher data density. The resistivity-grain size relation can be applied to other study areas with comparable geological conditions. Saline groundwater can clearly be identifi ed and distinguished from non-saline regions in the Quakenbrück Basin by low resistivities.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: Zeitschrift der Deutschen Gesellschaft fur Geowissenschaften, Vol. 164, No. 2, 06.2013, p. 369-384.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Verfeinerung der dreidimensionalen Kartierung quartärer Sedimente im Quakenbrücker Becken, Norddeutschland, mit Hilfe aeroelektromagnetischer Messungen
AU - Klimke, Jennifer
AU - Wiederhold, Helga
AU - Winsemann, Jutta
AU - Ertl, Gabriele
AU - Elbracht, Jörg
PY - 2013/6
Y1 - 2013/6
N2 - The increasing demand on using the subsurface raises the call for a better understanding of the depositional architecture. In this study, we demonstrate how 3D subsurface models can be improved by airborne electromagnetic data. The study area is located in the Pleistocene Quakenbrück Basin in Northern Germany. This overdeepened basin is fronted by a push moraine ridge and fi lled with Middle Pleistocene (Saalian) to Holocene sediments known from a limited amount of borehole data. In 2009, this area was target of an aeroelectromagnetic survey with the SkyTEM system. For the interpretation of SkyTEM resistivity data, a relation between grain size and resistivity was derived using resistivity borehole logs from the larger study area. The analysis of the data showed a positive correlation as resistivity increases with increasing grain size and permeability. Each stratigraphic layer was then modelled with the commercial software GOCAD® based on the geological and geophysical information as each sediment layer is characterised by a specifi c resistivity in the SkyTEM data. Our results demonstrate that by integrating airborne electromagnetic data into geological 3D models, the distribution of stratigraphic units can be modelled with higher lateral resolution due to higher data density. The resistivity-grain size relation can be applied to other study areas with comparable geological conditions. Saline groundwater can clearly be identifi ed and distinguished from non-saline regions in the Quakenbrück Basin by low resistivities.
AB - The increasing demand on using the subsurface raises the call for a better understanding of the depositional architecture. In this study, we demonstrate how 3D subsurface models can be improved by airborne electromagnetic data. The study area is located in the Pleistocene Quakenbrück Basin in Northern Germany. This overdeepened basin is fronted by a push moraine ridge and fi lled with Middle Pleistocene (Saalian) to Holocene sediments known from a limited amount of borehole data. In 2009, this area was target of an aeroelectromagnetic survey with the SkyTEM system. For the interpretation of SkyTEM resistivity data, a relation between grain size and resistivity was derived using resistivity borehole logs from the larger study area. The analysis of the data showed a positive correlation as resistivity increases with increasing grain size and permeability. Each stratigraphic layer was then modelled with the commercial software GOCAD® based on the geological and geophysical information as each sediment layer is characterised by a specifi c resistivity in the SkyTEM data. Our results demonstrate that by integrating airborne electromagnetic data into geological 3D models, the distribution of stratigraphic units can be modelled with higher lateral resolution due to higher data density. The resistivity-grain size relation can be applied to other study areas with comparable geological conditions. Saline groundwater can clearly be identifi ed and distinguished from non-saline regions in the Quakenbrück Basin by low resistivities.
KW - 3D model
KW - Aeroelectromagnetic method
KW - Geophysics
KW - Pleistocene basin
UR - http://www.scopus.com/inward/record.url?scp=84879383716&partnerID=8YFLogxK
U2 - 10.1127/1860-1804/2013/0023
DO - 10.1127/1860-1804/2013/0023
M3 - Artikel
AN - SCOPUS:84879383716
VL - 164
SP - 369
EP - 384
JO - Zeitschrift der Deutschen Gesellschaft fur Geowissenschaften
JF - Zeitschrift der Deutschen Gesellschaft fur Geowissenschaften
SN - 1860-1804
IS - 2
ER -