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Advancing Santorini’s tephrostratigraphy: new glass geochemical data and improved marine-terrestrial tephra correlations for the past ∼360 kyrs ArchiMer
Wulf, Sabine; Keller, Jörg; Satow, Christopher; Gertisser, Ralf; Kraml, Michael; Grant, Katharine M.; Appelt, Oona; Vakhrameeva, Polina; Koutsodendris, Andreas; Hardiman, Mark; Schulz, Hartmut; Pross, Jörg.
The island of Santorini in the Aegean Sea is one of the world’s most violent active volcanoes. Santorini has produced numerous highly explosive eruptions over at least the past ∼360 kyrs that are documented by the island’s unique proximal tephra record. However, the lack of precise eruption ages and comprehensive glass geochemical datasets for proximal tephras has long hindered the development of a detailed distal tephrostratigraphy for Santorini eruptions. In light of these requirements, this study develops a distal tephrostratigraphy for Santorini covering the past ∼360 kyrs, which represents a major step forward towards the establishment of a tephrostratigraphic framework for the Eastern Mediterranean region. We present new EPMA glass geochemical data...
Tipo: Text Palavras-chave: Santorini; EPMA glass chemistry; Proximal tephra deposits; Marine tephrostratigraphy; Land-sea correlations; Eastern Mediterranean region.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00588/70039/67968.pdf
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Estimated reservoir ages of the Black Sea since the last glacial ArchiMer
Kwiecien, O.; Arz, H. W.; Lamy, F.; Wulf, S.; Bahr, A.; Roehl, U.; Haug, G. H..
Accelerator mass spectrometry (AMS) radiocarbon dating of ostracod and gastropod shells from the southwestern Black Sea cores combined with tephrochronology provides the basis for studying reservoir age changes in the late-glacial Black Sea. The comparison of our data with records from the northwestern Black Sea shows that an apparent reservoir age of similar to 1450 C-14 yr found in the glacial is characteristic of a homogenized water column. This apparent reservoir age is most likely due to the hardwater effect. Though data indicate that a reservoir age of similar to 1450 C-14 yr may have persisted until the Bolling-Allerod warm period, a comparison with the GISP2 ice-core record suggests a gradual reduction of the reservoir age to similar to 1000 C-14...
Tipo: Text Palavras-chave: Mediterranean abyssal sediments; Minoan eruption; Tephra layers; Radiocarbon; Santorini; Deglaciation; History; Variability; Calibration; Resolution.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00209/31990/30430.pdf
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A new contribution to the Late Quaternary tephrostratigraphy of the Mediterranean: Aegean Sea core LC21 ArchiMer
Satow, C.; Tomlinson, E. L.; Grant, K. M.; Albert, P. G.; Smith, V. C.; Manning, C. J.; Ottolini, L.; Wulf, S.; Rohling, E. J.; Lowe, J. J.; Blockley, S. P. E.; Menzies, M. A..
Tephra layers preserved in marine sediments can contribute to the reconstruction of volcanic histories and potentially act as stratigraphic isochrons to link together environmental records. Recent developments in the detection of volcanic ash (tephra) at levels where none is macroscopically visible (so-called ‘crypto-tephra’) have greatly enhanced the potential of tephrostratigraphy for synchronising environmental and archaeological records by expanding the areas over which tephras are found. In this paper, crypto-tephra extraction techniques allow the recovery of 8 non-visible tephra layers to add to the 9 visible layers in a marine sediment core (LC21) from the SE Aegean Sea to form the longest, single core record of volcanic activity in the Aegean Sea....
Tipo: Text Palavras-chave: Tephra; Trace elements; Santorini; Campanian Ignimbrite; Pantelleria; Kos; Yali; Aegean sea; Mediterranean.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00294/40498/39433.pdf
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