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Potrok Aike Maar Lake Sediment Archive Drilling Project - The Swiss contribution (PASADO-CH)

English title Potrok Aike Maar Lake Sediment Archive Drilling Project - The Swiss contribution (PASADO-CH)
Applicant Ariztegui Daniel
Number 119931
Funding scheme Project funding
Research institution Département des sciences de la Terre Université de Genève
Institution of higher education University of Geneva - GE
Main discipline Geology
Start/End 01.04.2008 - 31.03.2011
Approved amount 349'991.00
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Keywords (10)

paleoclimate; deep drilling; patagonia; lakes; mutiproxy; diatoms; Southern Hemisphere; lacustrine sediments; multi-proxy; deep biosphere

Lay Summary (English)

Lead
Lay summary

Aseries of long sediment cores was retrieved from Laguna Potrok Aike, SouthernPatagonia, within the framework of PASADO (Potrok Aike Maar Lake SedimentArchive Drilling Project), an ICDP (International Continental ScientificDrilling Program) lake drilling project. This maar lake, located at 52°S 70°Win the Province of Santa Cruz (Argentina), in the southernmost continental areaof the world, is one of the few permanent lakes in the region, providing a uniquecontinuous paleoclimatic and paleoecological lacustrine record for the LastGlacial Cycle. Previous multiproxy studies of this site have characterized theenvironmental history of these dry lands in the Patagonian Steppe for the last16 cal ka BP. This new series of sediment cores provides a much longer recordof climate variability in Southern Patagonia since 51.1 cal ka BP. Using a multiproxystrategy, a set of samples (mostly from core catcher material) was analyzed forphysical properties, rock magnetism, geochemistry, CNS elemental analysis,stable isotopes, pollen and diatoms. Additionally, the Swiss contributionincluded investigations in living microbial communities within the sediments tocharacterize the subsurface biosphere in such a unique maar environment emphasizingintegrated studies of microbiology, geochemistry (pore waters), and mineral authigenesis/diagenesis.

This multiproxy limnogeological interpretation sheds new light on the regional Pleistocene and Holocene environmental history, revealing lake level variations through time and identifying time windows of interest where higher resolution analyses will be carried out.


Direct link to Lay Summary Last update: 21.02.2013

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Associated projects

Number Title Start Funding scheme
155927 From Satellites to Molecules (SAM): Strategies and tools for reconstructing Late Pleistocene climate in northeastern Patagonia 01.04.2015 Project funding
134545 Potrok Aike Maar Lake Sediments Archive Drilling Project - The Swiss contribution (PASADO-CH). Phase II 01.04.2011 Project funding
149221 Dead Sea Deep Drilling Project: The Swiss contribution (DSDDP-CH) - Phase II 01.12.2013 Project funding
132516 Dead Sea Deep Drilling Project: The Swiss contribution (DSDDP-CH) - Drilling Section 01.12.2010 Research Infrastructure
111928 Environmental Change Down South (ENDS): The climate record of Lago Fagnano, Tierra del Fuego - Phase II 01.04.2006 Project funding
147145 Swiss Membership in the International Continental Scientific Drilling Program (ICDP) 01.01.2014 Research Infrastructure
166308 Establishing stable IRON isotopes of laminated LAKE sediments as novel palaeoclimate proxy (IRONLAKE) 01.12.2016 Project funding
134545 Potrok Aike Maar Lake Sediments Archive Drilling Project - The Swiss contribution (PASADO-CH). Phase II 01.04.2011 Project funding
132529 Dead Sea Deep Drilling Project: The Swiss contribution (DSDDP-CH) - Science Section 01.12.2010 Project funding

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