Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data
Seismic reflection and refraction data provide insights into the sedimentary infill and the underlying volcanic structure of Laguna Potrok Aike, a maar lake situated in the Pali Aike Volcanic Field, Southern Patagonia. The lake has a diameter of ~3.5 km, a maximum water depth of ~100 m and a presume...
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ftawi:oai:epic.awi.de:22091 2024-09-15T17:43:33+00:00 Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data Gebhardt, Catalina De Batist, M. Niessen, Frank Anselmetti, F. S. Ariztegui, D. Haberzettl, T. Ohlendorf, C. Zolitschka, B. 2010 https://epic.awi.de/id/eprint/22091/ https://hdl.handle.net/10013/epic.34362 unknown Gebhardt, C. orcid:0000-0002-3227-0676 , De Batist, M. , Niessen, F. orcid:0000-0001-6453-0594 , Anselmetti, F. S. , Ariztegui, D. , Haberzettl, T. , Ohlendorf, C. and Zolitschka, B. (2010) Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data , IODP/ICDP Meeting, March 9-11, 2010, Frankfurt am Main, Germany. . hdl:10013/epic.34362 EPIC3IODP/ICDP Meeting, March 9-11, 2010, Frankfurt am Main, Germany. Conference notRev 2010 ftawi 2024-06-24T04:01:54Z Seismic reflection and refraction data provide insights into the sedimentary infill and the underlying volcanic structure of Laguna Potrok Aike, a maar lake situated in the Pali Aike Volcanic Field, Southern Patagonia. The lake has a diameter of ~3.5 km, a maximum water depth of ~100 m and a presumed age of ~770 ka. Its sedimentary regime is influenced by climatic and hydrologic conditions related to the Antarctic Circumpolar Current, the Southern Hemispheric Westerlies and sporadic outbreaks of Antarctic polar air masses. Multiproxy environmental reconstructions of the last 16 ka document, that this terminal lake reacts highly sensitive to climate change. Laguna Potrok Aike has recently become a major focus of the International Continental Scientific Drilling Program (ICDP) and was drilled down to 100 m below lake floor in late 2008 within the PASADO project.Seismic reflection data show relatively undisturbed, stratified lacustrine sediments at least in the upper ~100 m of the sedimentary infill but are obscured possibly by gas and/or coarser material in larger areas. A model calculated from seismic refraction data reveals a funnel-shaped structure embedded in the sandstone rocks of the surrounding Santa Cruz Formation. This funnel structure is filled by lacustrine sediments of up to 370 m in thickness. These can be separated into two distinct subunits with low acoustic velocities of 1500-1800 m s-1 in the upper subunit pointing at unconsolidated lacustrine muds, and enhanced velocities of 2000-2350 m s-1 in the lower subunit. Below these lacustrine sediments, a unit of probably volcanoclastic origin is observed (>2400 m s-1). This sedimentary succession is well comparable to other well-studied sequences (e.g. Messel and Baruth maars, Germany), confirming phreatomagmatic maar explosions as the origin of Laguna Potrok Aike.Seismic reflection data of the uppermost 100 m of the sediments reveal a rather dynamic development of the lake: on top of pelagic sediments a desiccation horizon is found, probably with ... Conference Object Antarc* Antarctic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Seismic reflection and refraction data provide insights into the sedimentary infill and the underlying volcanic structure of Laguna Potrok Aike, a maar lake situated in the Pali Aike Volcanic Field, Southern Patagonia. The lake has a diameter of ~3.5 km, a maximum water depth of ~100 m and a presumed age of ~770 ka. Its sedimentary regime is influenced by climatic and hydrologic conditions related to the Antarctic Circumpolar Current, the Southern Hemispheric Westerlies and sporadic outbreaks of Antarctic polar air masses. Multiproxy environmental reconstructions of the last 16 ka document, that this terminal lake reacts highly sensitive to climate change. Laguna Potrok Aike has recently become a major focus of the International Continental Scientific Drilling Program (ICDP) and was drilled down to 100 m below lake floor in late 2008 within the PASADO project.Seismic reflection data show relatively undisturbed, stratified lacustrine sediments at least in the upper ~100 m of the sedimentary infill but are obscured possibly by gas and/or coarser material in larger areas. A model calculated from seismic refraction data reveals a funnel-shaped structure embedded in the sandstone rocks of the surrounding Santa Cruz Formation. This funnel structure is filled by lacustrine sediments of up to 370 m in thickness. These can be separated into two distinct subunits with low acoustic velocities of 1500-1800 m s-1 in the upper subunit pointing at unconsolidated lacustrine muds, and enhanced velocities of 2000-2350 m s-1 in the lower subunit. Below these lacustrine sediments, a unit of probably volcanoclastic origin is observed (>2400 m s-1). This sedimentary succession is well comparable to other well-studied sequences (e.g. Messel and Baruth maars, Germany), confirming phreatomagmatic maar explosions as the origin of Laguna Potrok Aike.Seismic reflection data of the uppermost 100 m of the sediments reveal a rather dynamic development of the lake: on top of pelagic sediments a desiccation horizon is found, probably with ... |
format |
Conference Object |
author |
Gebhardt, Catalina De Batist, M. Niessen, Frank Anselmetti, F. S. Ariztegui, D. Haberzettl, T. Ohlendorf, C. Zolitschka, B. |
spellingShingle |
Gebhardt, Catalina De Batist, M. Niessen, Frank Anselmetti, F. S. Ariztegui, D. Haberzettl, T. Ohlendorf, C. Zolitschka, B. Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data |
author_facet |
Gebhardt, Catalina De Batist, M. Niessen, Frank Anselmetti, F. S. Ariztegui, D. Haberzettl, T. Ohlendorf, C. Zolitschka, B. |
author_sort |
Gebhardt, Catalina |
title |
Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data |
title_short |
Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data |
title_full |
Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data |
title_fullStr |
Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data |
title_full_unstemmed |
Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data |
title_sort |
origin and development of maar laguna potrok aike, southern patagonia, argentina seismic data |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/22091/ https://hdl.handle.net/10013/epic.34362 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
EPIC3IODP/ICDP Meeting, March 9-11, 2010, Frankfurt am Main, Germany. |
op_relation |
Gebhardt, C. orcid:0000-0002-3227-0676 , De Batist, M. , Niessen, F. orcid:0000-0001-6453-0594 , Anselmetti, F. S. , Ariztegui, D. , Haberzettl, T. , Ohlendorf, C. and Zolitschka, B. (2010) Origin and development of maar Laguna Potrok Aike, Southern Patagonia, Argentina seismic data , IODP/ICDP Meeting, March 9-11, 2010, Frankfurt am Main, Germany. . hdl:10013/epic.34362 |
_version_ |
1810490564761616384 |