Nathani Basavaiah, M. G. Wiesner, Ambili Anoop, P. Menzel, Norbert R. Nowaczyk, K. Deenadayalan, Achim Brauer, Birgit Gaye, R. Naumann, N. Riedel, M. Stebich, Sushma Prasad
- We report the results of our investigations on the catchment area, surface sediments, and hydrology of the monsoonal Lonar Lake, central India. Our results indicate that the lake is currently stratified with an anoxic bottom layer, and there is a spatial heterogeneity in the sensitivity of sediment parameters to different environmental processes. In the shallow (0-5 m) near shore oxic-suboxic environments the lithogenic and terrestrial organic content is high and spatially variable, and the organics show degradation in the oxic part. Due to aerial exposure resulting from lake level changes of at least 3m, the evaporitic carbonates are not completely preserved. In the deep water (>5 m) anoxic environment the lithogenics are uniformly distributed and the delta C-13 is an indicator not only for aquatic vs. terrestrial plants but also of lake pH and salinity. The isotopic composition of the evaporites is dependent not only on the isotopic composition of source water (monsoon rainfall and stream inflow) and evaporation, but is alsoWe report the results of our investigations on the catchment area, surface sediments, and hydrology of the monsoonal Lonar Lake, central India. Our results indicate that the lake is currently stratified with an anoxic bottom layer, and there is a spatial heterogeneity in the sensitivity of sediment parameters to different environmental processes. In the shallow (0-5 m) near shore oxic-suboxic environments the lithogenic and terrestrial organic content is high and spatially variable, and the organics show degradation in the oxic part. Due to aerial exposure resulting from lake level changes of at least 3m, the evaporitic carbonates are not completely preserved. In the deep water (>5 m) anoxic environment the lithogenics are uniformly distributed and the delta C-13 is an indicator not only for aquatic vs. terrestrial plants but also of lake pH and salinity. The isotopic composition of the evaporites is dependent not only on the isotopic composition of source water (monsoon rainfall and stream inflow) and evaporation, but is also influenced by proximity to the isotopically depleted stream inflow. We conclude that in the deep water environment lithogenic content, and isotopic composition of organic matter can be used for palaeoenvironmental reconstruction.…
MetadatenAuthor details: | Nathani Basavaiah, M. G. Wiesner, Ambili Anoop, P. Menzel, Norbert R. Nowaczyk, K. Deenadayalan, Achim BrauerORCiDGND, Birgit Gaye, R. Naumann, N. Riedel, M. Stebich, Sushma PrasadORCiD |
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DOI: | https://doi.org/10.1127/1863-9135/2014/0515 |
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ISSN: | 1863-9135 |
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Title of parent work (English): | Fundamental and applied limnology : official journal of the International Association of Theoretical and Applied Limnology |
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Publisher: | Schweizerbart |
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Place of publishing: | Stuttgart |
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Publication type: | Article |
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Language: | English |
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Year of first publication: | 2014 |
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Publication year: | 2014 |
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Release date: | 2017/03/27 |
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Tag: | isotopes; lonar lake; magnetic parameters; modern surface sediments; monsoon; palaeoenvironmental proxies |
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Volume: | 184 |
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Issue: | 1 |
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Number of pages: | 18 |
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First page: | 51 |
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Last Page: | 68 |
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Funding institution: | Deutsche Forschungsgemeinshaft (DFG, Germany) [FOR 1380]; Universitat
Potsdam; Deutsches GeoForschungsZentrum Potsdam; Indian Institute of
Geomagnetism, Mumbai |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
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Peer review: | Referiert |
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Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |
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