Chapter 1 Lacustrine Carbonates

Gierlowski‐Kordesch, Elizabeth

doi:10.1016/s0070-4571(09)06101-9

Cited by 131 publications

(76 citation statements)

References 359 publications

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“…This is a process that currently occurs in SMO during the warmer part of the year and that is, in general, favoured by high evaporation rates, leading to increased electric conductivity, alkalinity and pH (Eugster and Hardie, 1978;Gierlowski-Kordesch, 2010). Calcium may originate from the minerals in the catchment but it is also incorporated in authigenic carbonates.…”

Section: Interpretation Of Sediment Variablesmentioning

confidence: 99%

Climatic variability and human impact during the last 2000 years in western Mesoamerica: evidence of late Classic (AD 600–900) and Little Ice Age drought events

et al. 2015

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Abstract.We present results of analysis of biological (diatoms and ostracodes) and non-biological (Ti, Ca / Ti, total inorganic carbon, magnetic susceptibility) variables from an 8.8 m long, high-resolution (∼ 20 yr sample −1 ) laminated sediment sequence from Lake Santa María del Oro (SMO), western Mexico. This lake lies at a sensitive location between the dry climates of northern Mexico, under the influence of the North Pacific subtropical high-pressure cell and the moister climates of central Mexico, under the influence of the seasonal migration of the intertropical convergence zone and the North American monsoon (NAM). The sequence covers the last 2000 years and provides evidence of two periods of human impact in the catchment, shown by increases in the diatom Achnanthidium minutissimum. The first from AD 100 to 400 (Early Classic) is related to the shaft and chamber tombs cultural tradition in western Mexico, and the second is related to Post-Classic occupation from AD 1100 to 1300. Both periods correspond to relatively wet conditions.

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Section: Interpretation Of Sediment Variablesmentioning

confidence: 99%

Climatic variability and human impact during the last 2000 years in western Mesoamerica: evidence of late Classic (AD 600–900) and Little Ice Age drought events

et al. 2015

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“…In contrast to marine environments, which are buffered physically and chemically against minor environmental changes, lakes represent highly sensitive and dynamic systems, with the potential to record changes in hydrology such as water residence time, water balance, origin and composition of meteoric waters, sediment input, and climate changes such as fluctuations in precipitation (e.g., Tucker & Wright 1990;Leng & Marshall 2004;Gierlowski-Kordesch 2010). Provided that adequate age control is available, lacustrine carbonate deposited in such environments is capable of tracking some of this information and hence represents a valuable paleoenvironmental record.…”

Section: Stable Oxygen Isotope Geochemistrymentioning

confidence: 99%

Stable isotope-based reconstruction of Oligo-Miocene paleoenvironment and paleohydrology of Central Anatolian lake basins (Turkey)

Lüdecke¹

2013

Turkish J Earth Sci

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“…Thus, the mineralogical character, such as grain size, composition and structure of the carbonate minerals is of interest for an assessment of their ecological impact. On the other hand, some crystal chemical characteristics of sediment minerals can be used as proxies for past changes in water chemistry (Gierlowski-Kordesch 2010). In this study we analyze the structures of carbonate minerals that precipitate in Lake Balaton and discuss the environmental implications of the variable Mg contents of both calcite and dolomite.…”

Section: Introductionmentioning

confidence: 99%

Distribution and composition of Mg-calcite and dolomite in the water and sediments of Lake Balaton

Tompa

Nyírő-Kósa

Rostási

et al. 2014

Central European Geology

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Lake Balaton is a large and shallow lake that is of great economic and cultural importance in landlocked Hungary. Even though the lake has been studied extensively in the last century from a large number of scientific aspects, the mineralogy of its sediments has not been fully explored. The mud at the bottom of the lake consists mostly of silt-sized grains of carbonate minerals with compositions between those of calcite (CaCO 3 ) and dolomite CaMg (CO 3 ) 2 . In order to understand the processes of carbonate precipitation and the influence of water budget fluctuations on the mineralogical character of the sediment, we used X-ray powder diffraction to analyze the changes of cell parameters of carbonate minerals in the upper half meter of the sediment. The major carbonate phase is Mg-calcite that shows a distinct reduction in cell parameters from west to east, reflecting an increase of its Mg-content, in parallel with a gradient of dissolved Mg/Ca ratio in the water. Intriguingly, dolomite, the other widespread carbonate phase in the sediment, also shows a change in cell parameters from west to east, with the deviations from values of stoichiometric dolomite being largest in the Eastern Basin of the lake. The similar pattern of cell parameter changes of Mg-calcite and dolomite suggests that ordered dolomite with slightly anomalous, Ca-rich composition also forms in the lake, probably by direct precipitation from the water. In contrast, protodolomite forms within the sediment through diagenetic processes. Based on our X-ray powder diffraction measurements, we propose a model of carbonate mineral formation and transformation in Lake Balaton. Since the Mg/Ca ratio of the water appears to be the major factor in controlling the compositions of carbonate minerals, and this ratio in turn is governed by the amount of water supply, the properties of the precipitating carbonate minerals are affected by the actual level of the lake water.

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Chapter 1 Lacustrine Carbonates

Cited by 131 publications

References 359 publications

Climatic variability and human impact during the last 2000 years in western Mesoamerica: evidence of late Classic (AD 600–900) and Little Ice Age drought events

Climatic variability and human impact during the last 2000 years in western Mesoamerica: evidence of late Classic (AD 600–900) and Little Ice Age drought events

Stable isotope-based reconstruction of Oligo-Miocene paleoenvironment and paleohydrology of Central Anatolian lake basins (Turkey)

Distribution and composition of Mg-calcite and dolomite in the water and sediments of Lake Balaton

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