期刊
HOLOCENE
卷 22, 期 11, 页码 1323-1335出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0959683611429833
关键词
diatoms; geochemistry; lacustrine sediments; physical properties; pollen; rock magnetism; stable isotopes
资金
- International Continental Scientific Drilling Program (ICDP) in the framework of the 'Potrok Aike Maar Lake Sediment Archive Drilling Project' (PASADO)
- ICDP
- German Science Foundation (DFG)
- Swiss National Funds (SNF)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Swedish Vetenskapsradet (VR)
- University of Bremen
A series of long sediment cores was retrieved from Laguna Potrok Aike, Southern Patagonia, within the framework of PASADO (Potrok Aike Maar Lake Sediment Archive Drilling Project), an ICDP (International Continental Scientific Drilling Program) lake drilling project. This maar lake, located at 52 degrees S, 70 degrees W in the Province of Santa Cruz (Argentina), in the southernmost continental area of the world, is one of the few permanent lakes in the region, providing a unique continuous paleoclimatic and paleoecological lacustrine record for the last glacial cycle. Previous multiproxy studies of this site have characterized the environmental history of these dry lands in the Patagonian Steppe for the last 16 cal. ka BP. This new series of sediment cores provides a much longer record of climate variability in Southern Patagonia since 51.3 cal. ka BP. Using a multiproxy strategy, a set of samples (mostly from core catcher material) was analyzed for physical properties, rock magnetism, geochemistry, CNS elemental analysis, stable isotopes, pollen and diatoms. This preliminary 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.
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