noaa-lake-13801
Carbon and nitrogen stable isotopes of bulk sediment, ICDP Laguna Potrok Aike
Mayr, C.; Luecke, A.; Maidana, N.I.; Wille, M.; Haberzettl, T.; Corbella, H.; Ohlendorf, C.; Schaebitz, F.; Fey, M.; Janssen, S.; Zolitschka, B.
Carbon and nitrogen stable isotopes of bulk sediment, ICDP Laguna Potrok Aike
2013-02-13
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13801
Investigator
C.
Mayr
Investigator
A.
Luecke
Investigator
N.I.
Maidana
Investigator
M.
Wille
Investigator
T.
Haberzettl
Investigator
H.
Corbella
Investigator
C.
Ohlendorf
Investigator
F.
Schaebitz
Investigator
M.
Fey
Investigator
S.
Janssen
Investigator
B.
Zolitschka
earth science
paleoclimate
paleolimnology
depth at sample start,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
notes,null,null,null,null,paleolimnology,null,null,C,null
earth science
paleoclimate
paleolimnology
delta 15N,organic matter,null,per mil AIR,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
depth at sample end,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 13C,organic matter,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
carbon isotopes
earth science
paleoclimate
paleolimnology
geochemistry
geoscientificInformation
centennial resolution
decadal resolution
hydrology
Complete
-51.95
-51.95
-70.3833
-70.3833
113
113
Continent
South America
Argentina
Laguna Potrok Aike>LATITUDE -51.95>LONGITUDE -70.3833
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Mayr, C., Luecke, A., Maidana, N.I., Wille, M., Haberzettl, T., Corbella, H., Ohlendorf, C., Schaebitz, F., Fey, M., Janssen, S., Zolitschka, B., 2009. Isotopic fingerprints on lacustrine organic matter from Laguna Potrok Aike (southern Patagonia, Argentina) reflect environmental changes during the last 16,000 years. Journal of Paleolimnology 42:81-102.
Haberzettl, T., Corbella, H., Fey, M., Janssen, S., Luecke, A., Mayr, C., Ohlendorf, C., Schaebitz, F., Schleser, G.H., Wille, M., Wulf, S., Zolitschka, B., 2007. Lateglacial and Holocene wet-dry cycles in southern Patagonia: chronology, sedimentology and geochemistry of a lacustrine record from Laguna Potrok Aike, Argentina. The Holocene 17:297-310.
A combination of carbon-to-nitrogen ratios (TOC/TN), Rock Eval-analyses, and stable isotope values of bulk nitrogen (d15N) and organic carbon (d13Corg) was used to characterize bulk organic matter (OM) of a piston core from the Patagonian maar lake Laguna Potrok Aike (Argentina) for the purpose of palaeoenvironmental reconstruction. Sedimentary data were compared with geochemical signatures of potential OM sources from Laguna Potrok Aike and its catchment area to identify the sources of sedimentary OM. Correlation patterns between isotopic data and TOC/TN ratios allowed differentiation of five distinct phases with different OM composition. Before 8470 calibrated 14C years before present (cal. yrs BP) and after 7400 cal. yrs BP, isotopic and organo-geochemical fingerprints indicate that the sediments of Laguna Potrok Aike consist predominantly of soil and diatom OM with varying admixtures of cyanobacterial and aquatic macrophyte OM. For a short phase of the early Holocene (ca. 8470-7400 cal. yrs BP), however, extremely high input of soil OM is implied by isotopic fingerprints. Previous seismic and geochronological results indicate a severe lake-level drop of 33 m below present-day shortly before 6590 cal. yrs BP. It is suggested that this lake level drop was accompanied by increased erosion of shore banks and channel incision enhancing soil OM deposition in the lake basin. Thus, isotopic data can be linked to hydrological variations at Laguna Potrok Aike and allow a more precise dating of this extremely low lake level. An isotopic mixing model was used including four different sources (soil, cyanobacteria, diatom and aquatic macrophyte OM) to model OM variations and the model results were compared with quantitative microfossil data. Keywords Stable isotopes - Rock Eval analyses - Organic matter - Soil erosion - Isotope mixing model - South America - Late Quaternary - Lake sediments
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https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/argentina/potrok2009.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/argentina/potrok2009.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11