Borehole logging and seismic data from Lake Ohrid (North Macedonia/Albania) as a basis for age-depth modelling over the last one million years

Ulfers, Arne; Zeeden, Christian; Wagner, Bernd; Krastel, Sebastian; Buness, Hermann; Wonik, Thomas

doi:10.1016/j.quascirev.2021.107295

Cited by 14 publications

(21 citation statements)

References 41 publications

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“…Despite these difficulties, selected horizons can be well traced from the DEEP to the Pestani site, as has already been shown for some horizons with ages of <1 Ma (Ulfers et al . 2022), and thus support the correlation based on sedimentological data.…”

Section: Stratigraphical Correlation Of Deep and Pestani Recordssupporting

confidence: 85%

“…2015; Ulfers et al . 2022). Logging details, probes and data processing are described in detail in Baumgarten et al .…”

Section: Methodsmentioning

confidence: 99%

“…(2015) and Ulfers et al . (2022). Among various probes, a spectral gamma ray (SGR) probe was run through the drill pipe at a logging speed of 3 m min −1 and a sampling interval of 10 cm, which allows a vertical resolution of approximately 10–20 cm, and records the total gamma radiation (GR), as well as the spectral components (potassium, thorium and uranium) and their contribution to the GR (Baumgarten et al .…”

Section: Methodsmentioning

confidence: 99%

“…from the Pestani sediment succession, where borehole logging data (Ulfers et al . 2022) and core catcher material (Wagner et al . 2014) infer the transition to permanent lacustrine conditions.…”

Section: Methodsmentioning

confidence: 99%

“…Correlation of benthic isotope stack LR04 and MIS boundaries (Lisiecki & Raymo 2005), natural gamma radiation (GR, inverse scale) from borehole logging (Ulfers et al . 2022) and TIC, K from XRF scanning, TOC/TN ratio, and grain sizes in the DEEP and Pestani sediment successions. Ages and data from the DEEP site back to 1.36 Ma are from Francke et al .…”

Section: State Of the Artmentioning

confidence: 99%

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The geodynamic and limnological evolution of Balkan Lake Ohrid, possibly the oldest extant lake in Europe

Wagner

Tauber

Leicher

et al. 2022

Boreas

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Studies of the upper 447 m of the DEEP site sediment succession from central Lake Ohrid, Balkan Peninsula, North Macedonia and Albania provided important insights into the regional climate history and evolutionary dynamics since permanent lacustrine conditions established at 1.36 million years ago (Ma). This paper focuses on the entire 584m-long DEEP sediment succession and a comparison to a 197-m-long sediment succession from the Pestani site ~5 km to the east in the lake, where drilling ended close to the bedrock, to unravel the earliest history of Lake Ohrid and its basin development. 26 Al/ 10 Be dating of clasts from the base of the DEEP sediment succession implies that the sedimentation in the modern basin started at c. 2 Ma. Geophysical, sedimentological and micropalaeontological data allow for chronological information to be transposed from the DEEP to the Pestani succession. Fluvial conditions, slack water conditions, peat formation and/or complete desiccation prevailed at the DEEP and Pestani sites until 1.36 and 1.21 Ma, respectively, before a larger lake extended over both sites. Activation of karst aquifers to the east probably by tectonic activity and a potential existence of neighbouring Lake Prespa supported filling of Lake Ohrid. The lake deepened gradually, with a relatively constant vertical displacement rate of ~0.2 mm a À1 between the central and the eastern lateral basin and with greater water depth presumably during interglacial periods. Although the dynamic environment characterized by local processes and the fragmentary chronology of the basal sediment successions from both sites hamper palaeoclimatic significance prior to the existence of a larger lake, the new data provide an unprecedented and detailed picture of the geodynamic evolution of the basin and lake that is Europe's presumed oldest extant freshwater lake.

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Section: Stratigraphical Correlation Of Deep and Pestani Recordssupporting

confidence: 85%

“…2015; Ulfers et al . 2022). Logging details, probes and data processing are described in detail in Baumgarten et al .…”

Section: Methodsmentioning

confidence: 99%