Late Holocene geochemical history inferred from Sambhar and Didwana playa sediments, Thar Desert, India: Comparison and synthesis

Roy, Priyadarsi D.; Smykatz-Kloss, Werner; Sinha, Rajiv

doi:10.1016/j.quaint.2005.05.018

Cited by 45 publications

(25 citation statements)

References 25 publications

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“…Earlier paleo-hydrological reconstructions by Wasson et al (1984), Singh et al (1990), Enzel et al (1999), Deotare et al (2004), Sinha and Raymahashay (2004), Roy et al (2006), Sinha et al (2006) suggest that most of the playas were hyper saline during the last glacial maximum (LGM) and until 13-15 ka cal BP and fluctuated between hypersaline and fresh water conditions during 13-7 ka cal BP. Some of the western playas dried around 5-6 ka cal BP, but the eastern playas remained fresh and perennial between 7 and 5 ka cal BP and re-establishment of ephemeral saline conditions occurred after ca.…”

Section: Introductionmentioning

confidence: 99%

Geochemical signatures of Late Holocene paleo-hydrological changes from Phulera and Pokharan saline playas near the eastern and western margins of the Thar Desert, India

Roy

Nagar

Juyal

et al. 2009

Journal of Asian Earth Sciences

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Section: Introductionmentioning

confidence: 99%

Geochemical signatures of Late Holocene paleo-hydrological changes from Phulera and Pokharan saline playas near the eastern and western margins of the Thar Desert, India

Roy

Nagar

Juyal

et al. 2009

Journal of Asian Earth Sciences

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“…This suggests that higher inflow into the basins caused greater erosion in the catchments and transports metals into the lake basin (Schuett, 1998(Schuett, , 2000. Similarly, temporal variation in the ratios of SiO 2 /Al 2 O 3 and Zr/Al 2 O 3 reflects input of both quartz and zircon, respectively (Pye and Krinsley, 1986;Werne et al, 2002;Haug et al, 2003;Roy et al, 2006). The higher values of both the ratios correspond to coarser sediments and lower magnetic susceptibility at San Felipe.…”

Section: Paleo-hydrology and Paleo-climatementioning

confidence: 98%

“…It is reported from both fossil and modern saline lacustrine environment (Hay, 1966;Surdam and Eugster, 1976;English, 2001;Roy et al, 2006). In pyroclastic sediments, it is formed by the diagenetic reaction between saline solutions with precursor volcanic glass (e.g.…”

Section: Sediment Provenance and Depositional Environmentmentioning

confidence: 99%

Geochemical record of Late Quaternary paleoclimate from lacustrine sediments of paleo-lake San Felipe, western Sonora Desert, Mexico

Roy

Caballero

Lozano

et al. 2010

Journal of South American Earth Sciences

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“…For example, wetting and drying cycles were shown to lead to elevated phosphorus release from floodplain sediments, which was related to enhanced reduction of iron hydroxides (Schönbrunner et al 2012), supporting the relative stability of the sediments in the constantly wet Sywell reservoir in comparison to the floodplain cores. The rate at which different chemical elements are leached has also been shown to vary with Ca 2+ , Na + , K + , Fe 2+ and Mg 2+ being selectively leached relative to relatively immobile hydrolysate constituents Al 3+ and Ti 4+ (Roy et al 2006).…”

Section: Alterations To Geochemical and Mineral Magnetic Signaturesmentioning

confidence: 99%

The application of sediment fingerprinting to floodplain and lake sediment cores: assumptions and uncertainties evaluated through case studies in the Nene Basin, UK

2015

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Purpose: Fine sediment has been shown to be a major cause of the degradation of lakes and rivers, and as a result research has been directed towards the understanding of fine sediment dynamics and the minimisation of sediment inputs. The use of tracers within a sediment fingerprinting framework has become a heavily used technique to investigate the sources of fine sediment pressures. When combined with the use of historically deposited sediment the technique provides the opportunity to reconstruct past changes to the environment. However, alterations to tracer signatures during sediment transport and storage are a major potential source of uncertainty associated with tracer use. At present few studies have quantified the uncertainties associated with tracer use.Materials and methods: This paper investigated uncertainty by determining the differences between sediment provenance predictions obtained using lithogenic radionuclide, geochemical, and mineral magnetic signatures when fingerprinting lake and floodplain sedimentary deposits. It also investigated the potential causes of the observed differences.Results and discussion: A reservoir core was fingerprinted with the least uncertainty, with tracer group predictions ~28% apart and a consistent down-core trend in changing sediment provenance produced. When fingerprinting an on-line lake core and four floodplain cores, differences between tracer group predictions were as large as 100%; the down-core trends in changing sediment provenance were also different. The differences between tracer group predictions could be attributed to the organic matter content and particle size of the sediment.There was also evidence of the in-growth of bacterially derived magnetite and chemical dissolution affecting the preservation of tracer signatures. Simple data corrections for sediment organic matter content and particle size did not result in significantly greater agreement between the predictions of the different tracer groups. Likewise the inclusions of weightings for tracer discriminatory efficiency and within source variability had minimal effects on the fingerprinting results.Conclusions: This paper highlights the importance of tracer selection and the consideration of recognising tracer non-conservatism when using lake and floodplain sediment deposits to reconstruct anthropogenic changes to the environment and changing sediment dynamics. It was recommended that future research focus on the assessment of uncertainty using the artificial mixing of sediment source samples, the limitation of the fingerprinting to narrow particle size fractions and the development of specific particle size and organic matter correction factors for each tracer.

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Late Holocene geochemical history inferred from Sambhar and Didwana playa sediments, Thar Desert, India: Comparison and synthesis

Cited by 45 publications

References 25 publications

Geochemical signatures of Late Holocene paleo-hydrological changes from Phulera and Pokharan saline playas near the eastern and western margins of the Thar Desert, India

Geochemical signatures of Late Holocene paleo-hydrological changes from Phulera and Pokharan saline playas near the eastern and western margins of the Thar Desert, India

Geochemical record of Late Quaternary paleoclimate from lacustrine sediments of paleo-lake San Felipe, western Sonora Desert, Mexico

The application of sediment fingerprinting to floodplain and lake sediment cores: assumptions and uncertainties evaluated through case studies in the Nene Basin, UK

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