Late Holocene cliff-top dune evolution in the Hengchun Peninsula of Taiwan: Implications for palaeoenvironmental reconstruction

Ho, Lih-Der; Lüthgens, Christopher; Wong, Yi-Chia; Yen, Jiun-Yee; Chyi, Shyh-Jeng

doi:10.1016/j.jseaes.2017.08.024

Cited by 7 publications

(16 citation statements)

References 32 publications

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“…The feldspar luminescence signal was stimulated using infrared (870 nm) LEDs and detected through a LOT Oriel 410 nm interference filter. As already expected from the results from a previous study (Ho et al 2017), quartz turned out to be a questionable dosimeter for the samples from the coastal sections. Given the expected good bleaching conditions of this depositional environment, we refrained from using quartz as a dosimeter here, but used potassium-rich feldspar instead.…”

Section: Osl Experimental Setupsupporting

confidence: 78%

“…The sample preparation for grain size determination involves bulk sample drying (104°C for 24 hours) and a subsequent grain-size analysis pre-treatment (Lewis and McConchie 1994) to ensure minerogenic particle purity. The preparation process is described in detail in Ho et al (2017). The measurements were repeated at least 3 times and the results were displayed in a standardized grain-size classification.…”

Section: Grain Size Analysesmentioning

confidence: 99%

“…However, these studies also showed that despite these issues, reasonable results could be achieved using appropriate measurement protocols and careful data evaluation techniques. A study on a nearby dune section by Ho et al (2017) recently showed that using potassium-rich feldspar as a dosimeter can serve as a valuable alternative to quartz, especially in environments that are not prone to incomplete bleaching (insufficient resetting of the luminescence signal during transport, leading to age overestimation if not detected and corrected for). For this study, both quartz and potassium-rich feldspar were used for dating.…”

Section: Numerical Datingmentioning

confidence: 99%

“…Given the expected good bleaching conditions of this depositional environment, we refrained from using quartz as a dosimeter here, but used potassium-rich feldspar instead. A post infrared, infrared stimulated single aliquot regenerative dose protocol using a stimulation temperature of 150°C (pIRIR150 SAR protocol; Reimann and Tsukamoto 2012) already successfully applied in nearby dune sediments (Ho et al 2017) was also tested for application in this study. After adding an additional clean out step after each SAR cycle (IR stimulation at 200°C for 200 s), results from dose recovery experiments confirmed the suitability of the measurement protocol for both detected signals [pIRIR150, and IR50 (conventional IR signal at 50°C), Fig.…”

Section: Osl Experimental Setupmentioning

confidence: 99%

“…Temporal correlation of different archives is best achieved by combining different numerical dating methods. From the broad portfolio of dating methods available today, radiocarbon and optically stimulated luminescence (OSL) dating have proven suitable tools in the research area and for the targeted time period (Ho et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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The Holocene paleo-environmental history of the Gangkou River estuary, Hengchun Peninsula, Taiwan

Lüthgens¹,

Ho²,

Clemenz³

et al. 2018

Terr. Atmos. Ocean. Sci.

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The Taiwan coastal areas are facing predicted sea-level rise effects in the global climate change context. Better understanding of the mechanisms and forcing factors driving the geomorphological evolution of Taiwan's coastline is essential. We highlight the potential of small river estuaries as archives of coastal evolution and provide a paleo-environmental reconstruction of the Gangkou River estuary based on results from a combined methodological approach using geomorphological, sedimentological, and geochronological analyses. A consistent chronology was established by combining Optically Stimulated Luminescence (OSL) dating, as well as radiocarbon dating techniques. A distinct beach-rock layer allowed firm correlation of six investigated coastal profiles. Eustatic sea level change was identified as the primary coastal and estuarine landscape development forcing factor in the study area. Tectonic forcing could also be detected from the investigated sites, but has to be regarded as a subordinate secondary forcing factor. The Gangkou River estuary developed in the early Holocene at about 8 ka and was fully developed by the time the Holocene sea-level maximum was reached. With the sea-level dropping until modern times, estuarine zone relocation and a transition to terrestrial processes was initiated, leading to development of the current coastal dune system since about 2.5 ka. Major dune building phases correlate with the climate change associated with the Little Ice Age (LIA) event and stabilised towards recent times, which is in accordance with regional and over-regional coastal Aeolian records in Taiwan.

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Section: Osl Experimental Setupsupporting

confidence: 78%

Section: Grain Size Analysesmentioning

confidence: 99%

Section: Numerical Datingmentioning

confidence: 99%

Section: Osl Experimental Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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