Sea-rain-lake relation in the Last Glacial East Mediterranean revealed by δ18O-δ13C in Lake Lisan aragonites

Kolodny, Yehoshua; Stein, Mordechai; Machlus, M.L.

doi:10.1016/j.gca.2004.11.022

Cited by 128 publications

(112 citation statements)

References 65 publications

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“…To a first order, changes in δ 18 O measured in aragonite follow closely the patterns of δ 18 O changes measured in the Soreq Cave and East Mediterranean surface water with higher δ 18 O corresponding to glacial stages and lower δ 18 O in interglacial, reflecting the control of temporal changes in the East Mediterranean source water composition on δ 18 O compositions both in the cave and in the lake (see further discussion in Kolodny et al, 2005). Figure 5 shows that the aragonite δ 18 O is decoupled from both the δ 34 S and δ 18 O (SO4) measured in the primary gypsum.…”

Section: Coupling and Decoupling Of δ 34 S And δ 18 O (So4)supporting

confidence: 63%

“…However, the relative change in δ 18 O (SO4) vs. δ 34 S suggests that the overall cell specific rate slows down when microbial sulfate reduction occurs in the stratified water column (primarily during glacial times), in spite of overall higher sulfate concentrations. We infer that this may be due to a change in the carbon source, where during the glacial fresher lake periods, an increase in primary production in the surface water (as suggested by δ 13 C values in aragonite; Kolodny et al, 2005) supplies the primary carbon source for microbial sulfate reduction in the water column. In contrast, during interglacial periods, when the lake is low, mixed and more saline, primary production may be virtually absent, and the carbon source for microbial sulfate reduction is methane produced in the sediment from the reduction of previously deposited organic carbon.…”

Section: The Microbial Sulfur Cycle In Lake Lisanmentioning

confidence: 94%

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Rates and Cycles of Microbial Sulfate Reduction in the Hyper-Saline Dead Sea over the Last 200 kyrs from Sedimentary δ34S and δ18O(SO4)

Torfstein

Turchyn

2017

Front. Earth Sci.

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We report the δ 34 S and δ 18 O (SO4) measured in gypsum, pyrite, and elemental sulfur through a 456-m thick sediment core from the center of the Dead Sea, representing the last ∼200 kyrs, as well as from the exposed glacial outcrops of the Masada M1 section located on the margins of the modern Dead Sea. The results are used to explore and quantify the evolution of sulfur microbial metabolism in the Dead Sea and to reconstruct the lake's water column configuration during the late Quaternary. Layers and laminae of primary gypsum, the main sulfur-bearing mineral in the sedimentary column, display the highest δ 34 S and δ 18 O (SO4) in the range of 13-28 and 13-30 , respectively. Within this group, gypsum layers deposited during interglacials display lower δ 34 S and δ 18 O (SO4) relative to those associated with glacial or deglacial stages. The reduced sulfur phases, including chromium reducible sulfur, and secondary gypsum crystals are characterized by extremely low δ 34 S in the range of −27 to +7 . The δ 18 O (SO4) of the secondary gypsum in the M1 outcrop ranges from 8 to 14 . The relationship between δ 34 S and δ 18 O (SO4) of primary gypsum suggests that the rate of microbial sulfate reduction was lower during glacial relative to interglacial times. This suggests that the freshening of the lake during glacial wet intervals, and the subsequent rise in sulfate concentrations, slowed the rate of microbial metabolism. Alternatively, this could imply that sulfate-driven anaerobic methane oxidation, the dominant sulfur microbial metabolism today, is a feature of the hypersalinity in the modern Dead Sea. Sedimentary sulfides are quantitatively oxidized during epigenetic exposure, retaining the lower δ 34 S signature; the δ 18 O (SO4) of this secondary gypsum is controlled by oxygen atoms derived equally from atmospheric oxygen and from water, which is likely a unique feature in this hyperarid environment.

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Section: Coupling and Decoupling Of δ 34 S And δ 18 O (So4)supporting

confidence: 63%

Section: The Microbial Sulfur Cycle In Lake Lisanmentioning

confidence: 94%

Rates and Cycles of Microbial Sulfate Reduction in the Hyper-Saline Dead Sea over the Last 200 kyrs from Sedimentary δ34S and δ18O(SO4)

Torfstein

Turchyn

2017

Front. Earth Sci.

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“…BarMatthews et al, 2000;Zanchetta et al, 2007b). This has been interpreted in different ways and has been attributed to increasing the amount of precipitation related to an increase in winter precipitation of Atlantic origin or a significant (especially for eastern Mediterranean) freshening of surface marine water of the eastern Mediterranean at that time (e.g., Kolodny et al, 2005;Develle et al, 2010). The fact that Prespa records the lowest δ 18 O calcite values at ca.…”

Section: Oxygen Isotope Composition Of Bulk Calcitementioning

confidence: 99%

Late Quaternary palaeoenvironmental reconstruction from Lakes Ohrid and Prespa (Macedonia/Albania border) using stable isotopes

et al. 2010

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Abstract.Here we present stable isotope data from three sediment records from lakes that lie along the MacedonianAlbanian border (Lake Prespa: 1 core, and Lake Ohrid: 2 cores). The records only overlap for the last 40 kyr, although the longest record contains the MIS 5/6 transition (Lake Ohrid). The sedimentary characteristics of both lakes differ significantly between the glacial and interglacial phases. At the end of MIS 6 Lake Ohrid's water level was low (high δ 18 O calcite ) and, although productivity was increasing (high calcite content), the carbon supply was mainly from inorganic catchment rock sources (high δ 13 C carb ). During the last interglacial, calcite and TOC production and preservation increased, progressively lower δ 18 O calcite suggest increase in humidity and lake levels until around 115 ka. During ca. 80 ka to 11 ka the lake records suggest cold conditions as indicated by negligible calcite precipitation and low organic matter content. In Lake Ohrid, δ 13 C org are complacent; in contrast, Lake Prespa shows consistently higher δ 13 C org suggesting a low oxidation of 13 C-depleted organic matter in agreement with a general deterioration of climate conditions during the glacial. From 15 ka to the onset of the Holocene, calcite and TOC begin to increase, suggesting lake levels were probably low (high δ 18 O calcite ). In the Holocene (11 ka to present) enhanced productivity is manifested by high calcite and organic matter content. All three cores show an early Holocene characterised by low δ 18 O calcite , apart from the very early Holocene phase in Prespa where the lowest Correspondence to: M. J. Leng (mjl@bgs.ac.uk) δ 18 O calcite occurs at ca. 7.5 ka, suggesting a phase of higher lake level only in (the more sensitive) Lake Prespa. From 6 ka, δ 18 O calcite suggest progressive aridification, in agreement with many other records in the Mediterranean, although the uppermost sediments in one core records low δ 18 O calcite which we interpret as a result of human activity. Overall, the isotope data present here confirm that these two big lakes have captured the large scale, low frequency palaeoclimate variation that is seen in Mediterranean lakes, although in detail there is much palaeoclimate information that could be gained, especially small scale, high frequency differences between this region and the Mediterranean.

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“…There is also ample pollenbased evidence that MIS 2 was extremely arid across the region as a whole (Roucoux et al 2005). High lake levels during glacial times are also found in some Mediterranean records (Kolodny et al 2005), but most shallow alkaline lakes are at a low level (Jones et al 2013). …”

Section: Isotope Covariance and Facies Variabilitymentioning

confidence: 99%

Western Mediterranean climate and environment since Marine Isotope Stage 3: a 50,000-year record from Lake Banyoles, Spain

et al. 2015

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We present new stable isotope (δ 18 O calcite and δ 13 C calcite ) and diatom data from a 67-m sediment core (BAN II) from Lake Banyoles, northeastern Spain. We reassessed the chronology of the sequence by correlating stable isotope data with a shorter U-series-dated record from the lake, confirming a sedimentological offset between the two cores and demonstrating that BAN II spans Marine Isotope Stages (MIS) 3 to 1. Through comparison with previous records, the multi-proxy data are used to improve understanding of palaeolimnological dynamics and, by inference, western Mediterranean climate and environmental change during the past ca. 50,000 years. Three main zones, defined by isotope and diatom data, correspond to the MIS. The basal zone (MIS 3) is characterised by fluctuating δ 18 O calcite and benthic diatom abundance, indicating a high degree of environmental and climate variability, concomitant with large lake-level changes. During the full glacial (MIS 2), relatively constant δ 18 O calcite and a poorly preserved planktonicdominated diatom assemblage suggest stability, and intermittently, unusually high lake level.In MIS 1, δ 18 O calcite and δ 13 C calcite initially transition to lower values, recording a pattern of Late Glacial to Holocene change that is similar to other Mediterranean records. This study suggests that Lake Banyoles responds limnologically to changes in the North Atlantic oceanatmosphere system and provides an important dataset from the Iberian Peninsula, a region in need of longer-term records that can be used to correlate between marine and terrestrial archives, and between the western and eastern Mediterranean.4

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Sea-rain-lake relation in the Last Glacial East Mediterranean revealed by δ18O-δ13C in Lake Lisan aragonites

Cited by 128 publications

References 65 publications

Rates and Cycles of Microbial Sulfate Reduction in the Hyper-Saline Dead Sea over the Last 200 kyrs from Sedimentary δ34S and δ18O(SO4)

Rates and Cycles of Microbial Sulfate Reduction in the Hyper-Saline Dead Sea over the Last 200 kyrs from Sedimentary δ34S and δ18O(SO4)

Late Quaternary palaeoenvironmental reconstruction from Lakes Ohrid and Prespa (Macedonia/Albania border) using stable isotopes

Western Mediterranean climate and environment since Marine Isotope Stage 3: a 50,000-year record from Lake Banyoles, Spain

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