Constraining the timing of palaeosol development in Iranian arid environments using OSL dating

Zakieh Rashidi, Reza Sohbati, Alireza Karimi*, Mohammad Hadi Farpoor, Farhad Khormali, Warren Thompson, Andrew Sean Murray

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The ages of palaeosols in arid environments in Iran are constrained using the optically stimulated luminescence (OSL) signal from quartz. The luminescence properties of quartz OSL and K-feldspar infrared stimulated luminescence (IRSL) at 50 °C (IR50) and post-IR IRSL at 290 °C (pIRIR290) signals are compared to investigate the degree of bleaching of quartz OSL in individual samples at the time of deposition. A comparison between the quartz OSL and K-feldspar IR50 ages shows that 12 out of 15 samples were probably well-bleached prior to deposition. The 17 OSL ages constrain at least four broad phases of sediment deposition and soil formation on the central Iranian plateau: (i) prior to, and (ii) during, mid/late MIS 5 (at Isfahan and Lar), (iii) MIS 3 (at Bam, Mahan and probably Isfahan) and (iv) MIS 1 (at Rayen and Jiroft). In summary, there is no convincing evidence for palaeosol formation during MIS 4 and MIS 2; however pedogenesis does appear to have taken place during all other marine isotope stages over the last full glacial-interglacial cycle.
    Original languageEnglish
    JournalQuaternary Geochronology
    Volume49
    Pages (from-to)92-100
    ISSN1871-1014
    DOIs
    Publication statusPublished - 2019

    Keywords

    • Chronostratigraphy
    • Luminescence dating
    • Palaeoclimate
    • Bleaching
    • Marine isotope stage
    • Quartz OSL

    Cite this

    @article{96ddac4c64d04afe83b1af914835bed9,
    title = "Constraining the timing of palaeosol development in Iranian arid environments using OSL dating",
    abstract = "The ages of palaeosols in arid environments in Iran are constrained using the optically stimulated luminescence (OSL) signal from quartz. The luminescence properties of quartz OSL and K-feldspar infrared stimulated luminescence (IRSL) at 50 °C (IR50) and post-IR IRSL at 290 °C (pIRIR290) signals are compared to investigate the degree of bleaching of quartz OSL in individual samples at the time of deposition. A comparison between the quartz OSL and K-feldspar IR50 ages shows that 12 out of 15 samples were probably well-bleached prior to deposition. The 17 OSL ages constrain at least four broad phases of sediment deposition and soil formation on the central Iranian plateau: (i) prior to, and (ii) during, mid/late MIS 5 (at Isfahan and Lar), (iii) MIS 3 (at Bam, Mahan and probably Isfahan) and (iv) MIS 1 (at Rayen and Jiroft). In summary, there is no convincing evidence for palaeosol formation during MIS 4 and MIS 2; however pedogenesis does appear to have taken place during all other marine isotope stages over the last full glacial-interglacial cycle.",
    keywords = "Chronostratigraphy, Luminescence dating, Palaeoclimate, Bleaching, Marine isotope stage, Quartz OSL",
    author = "Zakieh Rashidi and Reza Sohbati and Alireza Karimi and Farpoor, {Mohammad Hadi} and Farhad Khormali and Warren Thompson and Murray, {Andrew Sean}",
    year = "2019",
    doi = "10.1016/j.quageo.2018.04.006",
    language = "English",
    volume = "49",
    pages = "92--100",
    journal = "Quaternary Geochronology",
    issn = "1871-1014",
    publisher = "Elsevier",

    }

    Constraining the timing of palaeosol development in Iranian arid environments using OSL dating. / Rashidi, Zakieh; Sohbati, Reza; Karimi, Alireza; Farpoor, Mohammad Hadi; Khormali, Farhad; Thompson, Warren; Murray, Andrew Sean.

    In: Quaternary Geochronology, Vol. 49, 2019, p. 92-100.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - Constraining the timing of palaeosol development in Iranian arid environments using OSL dating

    AU - Rashidi, Zakieh

    AU - Sohbati, Reza

    AU - Karimi, Alireza

    AU - Farpoor, Mohammad Hadi

    AU - Khormali, Farhad

    AU - Thompson, Warren

    AU - Murray, Andrew Sean

    PY - 2019

    Y1 - 2019

    N2 - The ages of palaeosols in arid environments in Iran are constrained using the optically stimulated luminescence (OSL) signal from quartz. The luminescence properties of quartz OSL and K-feldspar infrared stimulated luminescence (IRSL) at 50 °C (IR50) and post-IR IRSL at 290 °C (pIRIR290) signals are compared to investigate the degree of bleaching of quartz OSL in individual samples at the time of deposition. A comparison between the quartz OSL and K-feldspar IR50 ages shows that 12 out of 15 samples were probably well-bleached prior to deposition. The 17 OSL ages constrain at least four broad phases of sediment deposition and soil formation on the central Iranian plateau: (i) prior to, and (ii) during, mid/late MIS 5 (at Isfahan and Lar), (iii) MIS 3 (at Bam, Mahan and probably Isfahan) and (iv) MIS 1 (at Rayen and Jiroft). In summary, there is no convincing evidence for palaeosol formation during MIS 4 and MIS 2; however pedogenesis does appear to have taken place during all other marine isotope stages over the last full glacial-interglacial cycle.

    AB - The ages of palaeosols in arid environments in Iran are constrained using the optically stimulated luminescence (OSL) signal from quartz. The luminescence properties of quartz OSL and K-feldspar infrared stimulated luminescence (IRSL) at 50 °C (IR50) and post-IR IRSL at 290 °C (pIRIR290) signals are compared to investigate the degree of bleaching of quartz OSL in individual samples at the time of deposition. A comparison between the quartz OSL and K-feldspar IR50 ages shows that 12 out of 15 samples were probably well-bleached prior to deposition. The 17 OSL ages constrain at least four broad phases of sediment deposition and soil formation on the central Iranian plateau: (i) prior to, and (ii) during, mid/late MIS 5 (at Isfahan and Lar), (iii) MIS 3 (at Bam, Mahan and probably Isfahan) and (iv) MIS 1 (at Rayen and Jiroft). In summary, there is no convincing evidence for palaeosol formation during MIS 4 and MIS 2; however pedogenesis does appear to have taken place during all other marine isotope stages over the last full glacial-interglacial cycle.

    KW - Chronostratigraphy

    KW - Luminescence dating

    KW - Palaeoclimate

    KW - Bleaching

    KW - Marine isotope stage

    KW - Quartz OSL

    U2 - 10.1016/j.quageo.2018.04.006

    DO - 10.1016/j.quageo.2018.04.006

    M3 - Journal article

    VL - 49

    SP - 92

    EP - 100

    JO - Quaternary Geochronology

    JF - Quaternary Geochronology

    SN - 1871-1014

    ER -