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首页> 外文期刊>Quaternary geochronology >Stone pavements in arid environments: Reasons for D-e overdispersion and grain-size dependent OSL ages
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Stone pavements in arid environments: Reasons for D-e overdispersion and grain-size dependent OSL ages

机译：干旱环境中的石材路面：D-E过分分解的原因和粒度依赖性OSL年龄

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摘要

Stone pavements are typical landforms in arid environments, composed of a monolayer of clasts at the surface, associated with an underlying unit of eolian fines. They represent important paleoenvironmental sediment archives, for which reliable chronostratigraphic age constraints are needed. In a first study on stone pavements from the Mojave Desert/USA and Badia Desert/Jordan it could be demonstrated that optically stimulated luminescence dating (OSL) on quartz represents a promising dating method for the eolian fines, but quartz OSL results remained challenging, because the D-e distributions were unexpectedly broad and OSL fine- and coarse-grain ages were significantly different (Fuchs et al., 2015). The reason for this age difference was unclear and methodological as well as geomorphological arguments were proposed. Here we present new quartz OSL results from additional study sites and various environmental settings, to better understand possible methodological or geomorphological reasons for the previously detected age characteristics. Stone pavements from the Negev Desert/Israel, from Fuerteventura/Spain and from the Black Rock Desert/USA are investigated in this new study, and their OSL results derived from different grain sizes are compared and discussed.
机译：石材路面是干旱环境中的典型地貌，它由表面的单层组成，与Eolian罚款的底层单元相关联。它们代表了重要的古环境沉积物档案，需要可靠的计时器年龄约束。在从莫哈韦沙漠/美国和Badia Desert / Jordan的第一次研究中，可以证明，石英上的光学刺激的发光约会（OSL）代表了Eolian细粉的有希望的约会方法，但石英OSL结果仍然挑战，因为DE分布出乎意料地宽泛，欧育细胞和粗晶患者显着不同（FUCHS等，2015）。这个年龄差异的原因是不明确的，提出了方法论和地貌论点。在这里，我们提出了新的Quartz OSL结果来自其他研究网站和各种环境环境，以更好地了解以前检测到的年龄特征的可能方法或地貌原因。来自Negev Desert /以色列的石材路面，来自Fuerteventura /西班牙以及来自Black Rock Desert / USA的新研究，并比较了他们的OSL结果来自不同谷物尺寸的结果和讨论。

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