Natural Residual Thermoluminescence as a Method of Analysis of Sand Transport along the Coast of the St. Joseph Peninsula, Florida
Natural Residual Thermoluminescence as a Method of Analysis of Sand Transport along the Coast of the St. Joseph Peninsula, Florida
复制标题
天然残留热释光作为佛罗里达州圣约瑟夫半岛沿岸沙粒运输分析的方法
DOI：
10.2112/04-0406.1
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发表时间：
2008
影响因子：
14.9
通讯作者：
W. Rink
中科院分区：
文献类型：
--
作者：
K. Z. K¸eizars;B. Forrest;W. Rink
摘要圣约瑟夫半岛位于佛罗里达，沿着墨西哥湾东北海岸。天然剩余热释光（NRTL）分析的石英颗粒提取的砂在8个地点显示，NRTL强度从南到北逐渐减少，这也是沿岸运输的公认方向。NRTL减少的差异也注意到粒度级之间，表明在旅行过程中的光暴露的差异反应，或不同的暴露量之间的粒度。使用模拟阳光照射在空气和海水中的实验室实验与自然暴露实验相结合，其中粒度级之间的冲刷区中的停留时间的差异进行了量化。在这项研究中，沉积物的停留时间在冲洗区沿着圣约瑟夫半岛的估计从25天到29天不等，这取决于粒度。发现90-150-µm和150-212-µm颗粒之间的沿岸的区域驻留差异为67%。研究结果表明，NRTL作为一种新的输沙分析方法的意义。
Abstract St. Joseph Peninsula is located in Florida, along the northeast coast of the Gulf of Mexico. Natural residual thermoluminescence (NRTL) analysis of quartz grains extracted from sands at eight localities showed a gradual reduction in NRTL intensity from south to north, which is also the accepted direction of longshore transport. Differences in NRTL reduction were also noted between grain size fractions, indicating either differential response to light exposure during travel, or different amounts of exposure between grain sizes. Laboratory experiments using simulated sunlight exposure in air and seawater were combined with natural exposure experiments, wherein differences in residence time in the swash zone between grain size fractions were quantified. In this study, sediment residence times in the swash zone along the St. Joseph Peninsula were estimated to vary from ∼25 days to ∼9 days depending on grain size. A 67% variance in littoral zone residence between 90–150-µm and 150–212-µm grains is revealed. The results of this study indicate the significance of NRTL as a novel method of sand transport analysis.