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Characteristics and Age of Quartz-Luminescence From Eastern Alpine Glacigenic Sediments

Spencer, J Q ; Spoetl, C

Eos (Washington, D.C.), 2006-12, Vol.87 (52)

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  • Título:
    Characteristics and Age of Quartz-Luminescence From Eastern Alpine Glacigenic Sediments
  • Autor: Spencer, J Q ; Spoetl, C
  • É parte de: Eos (Washington, D.C.), 2006-12, Vol.87 (52)
  • Notas: SourceType-Scholarly Journals-2
    ObjectType-Conference Paper-1
    content type line 23
    SourceType-Conference Papers & Proceedings-1
    ObjectType-Feature-2
    ObjectType-Article-3
  • Descrição: Our current understanding of the Quaternary history of the Eastern Alps is largely based on a limited radiocarbon chronology. This lack of chronological data is due principally to the scarcity of suitable material for radiocarbon dating, but also because of the paucity of suitable sites where other methods such as U-series, Ar-Ar or cosmogenic dating may be applied. Furthermore, the applicability of radiocarbon is limited not only by age range but also because much of the sedimentary Quaternary archive was deposited during advancing and recessional glacial periods, when the presence of organic materials was climatically restricted. In recent years advances in determining the depositional age of fine-grained siliclastic sediments using luminescence techniques have been made, to the stage where this dating method is now considered a routine chronological approach for many Quaternary deposits. The vast majority of sediments in the valleys and basins within the greater alpine realm are siliclastic in origin, furthering the attraction of applying luminescence dating techniques in this region. We have measured the luminescence from quartz extracted from glacigenic sediments from the Inn and i?tz valleys in Tyrol and the Brixen Basin in South Tyrol. We will discuss characteristics of blue-diode stimulated luminescence from these quartz minerals including aspects of the continuous-wave optically stimulated luminescence (CW-OSL), linearly modulated OSL (LM-OSL) and fundamental tests of reliability for dating protocols. Initial age estimates from the Brixen Basin suggest glacigenic sediments were deposited during MIS3, MIS4-5 and possibly MIS6. We will discuss these findings and further dating results from the study sites.
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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