Details
| Original language | English |
|---|---|
| Pages (from-to) | 51-70 |
| Number of pages | 20 |
| Journal | Scientific Drilling |
| Volume | 31 |
| Early online date | 28 Oct 2022 |
| Publication status | Published - Oct 2022 |
Abstract
The sedimentary infill of glacially overdeepened valleys (i.e., structures eroded below the fluvial base level) is an excellent but yet underexplored archive with regard to the age, extent, and nature of past glaciations. The ICDP project DOVE (Drilling Overdeepened Alpine Valleys) Phase 1 investigates a series of drill cores from glacially overdeepened troughs at several locations along the northern front of the Alps. All sites will be investigated with regard to several aspects of environmental dynamics during the Quaternary, with focus on the glaciation, vegetation, and landscape history. Geophysical methods (e.g., seismic surveys), for example, will explore the geometry of overdeepened structures to better understand the process of overdeepening. Sedimentological analyses combined with downhole logging, analysis of biological remains, and state-of-the-art geochronological methods, will enable us to reconstruct the erosion and sedimentation history of the overdeepened troughs. This approach is expected to yield significant novel data quantifying the extent and timing of Middle and Late Pleistocene glaciations of the Alps. In a first phase, two sites were drilled in late 2021 into filled overdeepenings below the paleolobe of the Rhine Glacier, and both recovered a trough filling composed of multiphase glacial sequences. Fully cored Hole 5068_1_C reached a depth of 165m and recovered 10m molasse bedrock at the base. This hole will be used together with two flush holes (5068_1_A, 5068_1_B) for further geophysical cross-well experiments. Site 5068_2 reached a depth of 255m and bottomed out near the soft rock-bedrock contact. These two sites are complemented by three legacy drill sites that previously recovered filled overdeepenings below the more eastern Alpine Isar-Loisach, Salzach, and Traun paleoglacier lobes (5068_3, 5068_4, 5068_5). All analysis and interpretations of this DOVE Phase 1 will eventually lay the ground for an upcoming Phase 2 that will complete the pan-Alpine approach. This follow-up phase will investigate overdeepenings formerly occupied by paleoglacier lobes from the western and southern Alpine margins through drilling sites in France, Italy, and Slovenia. Available geological information and infrastructure make the Alps an ideal area to study overdeepened structures; however, the expected results of this study will not be restricted to the Alps. Such features are also known from other formerly glaciated mountain ranges, which are less studied than the Alps and more problematic with regards to drilling logistics. The results of this study will serve as textbook concepts to understand a full range of geological processes relevant to formerly glaciated areas all over our planet.
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Mechanical Engineering
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In: Scientific Drilling, Vol. 31, 10.2022, p. 51-70.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Drilling Overdeepened Alpine Valleys (ICDP-DOVE)
T2 - Quantifying the age, extent, and environmental impact of Alpine glaciations
AU - Anselmetti, Flavio S.
AU - Bavec, Milos
AU - Crouzet, Christian
AU - Fiebig, Markus
AU - Gabriel, Gerald
AU - Preusser, Frank
AU - Ravazzi, Cesare
AU - Dove Scientific Team
AU - Ariztegui, Daniel
AU - Beraus, Sarah
AU - Brandt, Anna Catharina
AU - Buechi, Marius
AU - Buness, Herman
AU - Burschil, Thomas
AU - Dehnert, Andreas
AU - Deplazes, Gaudenz
AU - Götzl, Gregor
AU - Firla, Gustav
AU - Gegg, Lukas
AU - Graf, Hans Rudolf
AU - Heeschen, Katja
AU - Kipfer, Rolf
AU - Kroemer, Ernst
AU - Lüthgens, Christopher
AU - Monegato, Giovanni
AU - Neuhuber, Stephanie
AU - Pini, Roberta
AU - Reitner, Jürgen
AU - Salcher, Bernhard
AU - Schaller, Sebastian
AU - Schmalfuss, Clemens
AU - Schmelzbach, Cedric
AU - Scholger, Robert
AU - Schuster, Bennet
AU - Stumpf, Andrew
AU - Tanner, David C.
AU - Thomas, Camille
AU - Tomonaga, Yama
AU - Wieland-Schuster, Ulrike
AU - Wonik, Thomas
N1 - Funding Information: This research has been supported by ICDP, the Deutsche Forschungsgemeinschaft (DFG, grant nos. KR2073/3-1, BU 2467/1-2, GA749/5-1, BU2467/3-1, BU 3894/2-1, BU3894/3-1, and PR 957/6-1), Nagra, ENSI, LGRB, LFU, LIAG, BOKU Vienna, and University of Bern. Funding Information: We are grateful for continuing support of the International Scientific Continental Drilling Program (ICDP), including logistic support from the ICDP Operational Support Group. We are grateful to drilling companies, Fretus AG and H. Anger's Söhne GmbH, for providing us with high-quality drill cores in Basadingen and Tannwald, respectively. We also acknowledge strong support by the communities of Basadingen-Schlattingen and Winterstettenstadt, respectively. Technical staff of LIAG assisted with the seismic pre-site surveys and the downhole logging. We acknowledge all ICDP workshop participants in Como, who contributed to realizing this larger DOVE initiative.
PY - 2022/10
Y1 - 2022/10
N2 - The sedimentary infill of glacially overdeepened valleys (i.e., structures eroded below the fluvial base level) is an excellent but yet underexplored archive with regard to the age, extent, and nature of past glaciations. The ICDP project DOVE (Drilling Overdeepened Alpine Valleys) Phase 1 investigates a series of drill cores from glacially overdeepened troughs at several locations along the northern front of the Alps. All sites will be investigated with regard to several aspects of environmental dynamics during the Quaternary, with focus on the glaciation, vegetation, and landscape history. Geophysical methods (e.g., seismic surveys), for example, will explore the geometry of overdeepened structures to better understand the process of overdeepening. Sedimentological analyses combined with downhole logging, analysis of biological remains, and state-of-the-art geochronological methods, will enable us to reconstruct the erosion and sedimentation history of the overdeepened troughs. This approach is expected to yield significant novel data quantifying the extent and timing of Middle and Late Pleistocene glaciations of the Alps. In a first phase, two sites were drilled in late 2021 into filled overdeepenings below the paleolobe of the Rhine Glacier, and both recovered a trough filling composed of multiphase glacial sequences. Fully cored Hole 5068_1_C reached a depth of 165m and recovered 10m molasse bedrock at the base. This hole will be used together with two flush holes (5068_1_A, 5068_1_B) for further geophysical cross-well experiments. Site 5068_2 reached a depth of 255m and bottomed out near the soft rock-bedrock contact. These two sites are complemented by three legacy drill sites that previously recovered filled overdeepenings below the more eastern Alpine Isar-Loisach, Salzach, and Traun paleoglacier lobes (5068_3, 5068_4, 5068_5). All analysis and interpretations of this DOVE Phase 1 will eventually lay the ground for an upcoming Phase 2 that will complete the pan-Alpine approach. This follow-up phase will investigate overdeepenings formerly occupied by paleoglacier lobes from the western and southern Alpine margins through drilling sites in France, Italy, and Slovenia. Available geological information and infrastructure make the Alps an ideal area to study overdeepened structures; however, the expected results of this study will not be restricted to the Alps. Such features are also known from other formerly glaciated mountain ranges, which are less studied than the Alps and more problematic with regards to drilling logistics. The results of this study will serve as textbook concepts to understand a full range of geological processes relevant to formerly glaciated areas all over our planet.
AB - The sedimentary infill of glacially overdeepened valleys (i.e., structures eroded below the fluvial base level) is an excellent but yet underexplored archive with regard to the age, extent, and nature of past glaciations. The ICDP project DOVE (Drilling Overdeepened Alpine Valleys) Phase 1 investigates a series of drill cores from glacially overdeepened troughs at several locations along the northern front of the Alps. All sites will be investigated with regard to several aspects of environmental dynamics during the Quaternary, with focus on the glaciation, vegetation, and landscape history. Geophysical methods (e.g., seismic surveys), for example, will explore the geometry of overdeepened structures to better understand the process of overdeepening. Sedimentological analyses combined with downhole logging, analysis of biological remains, and state-of-the-art geochronological methods, will enable us to reconstruct the erosion and sedimentation history of the overdeepened troughs. This approach is expected to yield significant novel data quantifying the extent and timing of Middle and Late Pleistocene glaciations of the Alps. In a first phase, two sites were drilled in late 2021 into filled overdeepenings below the paleolobe of the Rhine Glacier, and both recovered a trough filling composed of multiphase glacial sequences. Fully cored Hole 5068_1_C reached a depth of 165m and recovered 10m molasse bedrock at the base. This hole will be used together with two flush holes (5068_1_A, 5068_1_B) for further geophysical cross-well experiments. Site 5068_2 reached a depth of 255m and bottomed out near the soft rock-bedrock contact. These two sites are complemented by three legacy drill sites that previously recovered filled overdeepenings below the more eastern Alpine Isar-Loisach, Salzach, and Traun paleoglacier lobes (5068_3, 5068_4, 5068_5). All analysis and interpretations of this DOVE Phase 1 will eventually lay the ground for an upcoming Phase 2 that will complete the pan-Alpine approach. This follow-up phase will investigate overdeepenings formerly occupied by paleoglacier lobes from the western and southern Alpine margins through drilling sites in France, Italy, and Slovenia. Available geological information and infrastructure make the Alps an ideal area to study overdeepened structures; however, the expected results of this study will not be restricted to the Alps. Such features are also known from other formerly glaciated mountain ranges, which are less studied than the Alps and more problematic with regards to drilling logistics. The results of this study will serve as textbook concepts to understand a full range of geological processes relevant to formerly glaciated areas all over our planet.
UR - http://www.scopus.com/inward/record.url?scp=85141937567&partnerID=8YFLogxK
U2 - 10.5194/sd-31-51-2022
DO - 10.5194/sd-31-51-2022
M3 - Article
AN - SCOPUS:85141937567
VL - 31
SP - 51
EP - 70
JO - Scientific Drilling
JF - Scientific Drilling
SN - 1816-8957
ER -