Revisiting the Y-3 tephrostratigraphic marker: a new diagnostic glass geochemistry, age estimate, and details on its climatostratigraphical context

QUATERNARY SCIENCE REVIEWS

卷:118

Review

Albert, Paul G.^1,2  Hardiman, Mark^3,4  Keller, Joerg⁵  Tomlinson, Emma L.^1,6  Smith, Victoria C.²  Bourne, Anna J.^3,7  Wulf, Sabine⁸  Zanchetta, Giovanni⁹  Sulpizio, Roberto¹⁰  Mueller, Ulrich C.¹¹  Pross, Joerg^11,12  Ottolini, Luisa¹³  Matthews, Ian P.³  Blockley, Simon P. E.³  Menzies, Martin A.¹ 

[1] Royal Holloway Univ London, Dept Earth Sci, Egham TW20 0EX, Surrey, England

[2] Univ Oxford, Res Lab Archaeol & Hist Art, S Parks Rd, Oxford OX1 3QY, England

[3] Royal Holloway Univ London, Dept Geog, Quaternary Res Ctr, Egham TW20 0EX, Surrey, England

[4] Univ Portsmouth, Dept Geog, Portsmouth PO1 2HE, Hants, England

[5] Univ Freiburg, Inst Geosci Mineral & Geochem, D-79104 Freiburg, Germany

[6] Trinity Coll Dublin, Dept Geol, Coll Green, Dublin 2, Ireland

[7] Swansea Univ, Dept Geog, Swansea SA2 8PP, W Glam, Wales

[8] German Res Ctr Geosci, Helmholtz Ctr Potsdam, Sect Climate Dynam & Landscape Evolut 5 2, D-14473 Potsdam, Germany

[9] Univ Pisa, Dipartimento Sci Terra, I-56126 Pisa, Italy

[10] Univ Bari, Dipartimento Sci Terra & Geoambientali, I-70125 Bari, Italy

[11] Biodivers & Climate Res Ctr, D-60325 Frankfurt, Germany

[12] Heidelberg Univ, Inst Earth Sci, Paleoenvironm Dynam Grp, D-69120 Heidelberg, Germany

[13] CNR, IGG, Unita Pavia, I-27100 Pavia, Italy

关键词: Y-3 tephra;    Ionian Sea;    Mediterranean tephrochronology;    Tenaghi Philippon;    Stadial conditions;    Bayesian age modelling;   

DOI  :  10.1016/j.quascirev.2014.04.002

来源: Elsevier

【 摘 要 】

The 'Y-3' tephra is a crucial stratigraphic marker within the central Mediterranean region that falls close to the Marine Isotope Stage 3/2 transition and a cooling event proposed as a correlative of the North Atlantic Heinrich Stadial 3 (HS3). Consequently, this tephra offers great potential to assess any leads and lags in environmental responses to this abrupt climatic transition. New grain-specific glass analysis (EMPA and LA-ICP-MS) of the type locality Y-3 tephra recorded in the Ionian Sea confirms its origin from Campi Flegrei (CF) but reveals that it is compositionally different from the previously suggested proximal equivalent the VRa eruptive unit (Verdolino Valley, CF). Consequently, the 40Ar/39Ar age of the VRa should not be exported distally to the Y-3 tephra. Instead, we propose a new robust age for the Y-3 tephra following its identification in the Tenaghi Philippon sedimentary record, NE Greece. A Bayesian-based C-14 age model from Tenaghi Philippon provides a distal age of 28,680-29,420 cal yrs BP for the Y-3 tephra. The identification of this tephra in NE Greece markedly extends its known eastern dispersal. Whilst its stratigraphic position falls within the latter part of a period of low tree pollen percentages related to dry stadial conditions. This new age and environmental context suggest that this marker postdates the onset of HS3 in the eastern Mediterranean region by similar to 2300 years. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free