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首页> 外文期刊>Geoscience journal >The role of fluid mud in the formation of extensive mud sheets during summer on the Duuri macrotidal flat, west coast of Korea
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The role of fluid mud in the formation of extensive mud sheets during summer on the Duuri macrotidal flat, west coast of Korea

机译：流体泥浆在夏季夏季泥浆床上形成的作用，韩国西海岸

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On the Duuri macrotidal flat along the west coast of Korea, mud sheets exceeding 20 cm in thickness form during summer, and are completely eliminated in the course of the following winter. This cyclical seasonal deposition/erosion of mud on the extensive intertidal flat of Korea has to date not been plausibly explained. To elucidate the responsible mechanism, vertical profiles of suspended sediment concentrations (SSCs) were obtained from March to August 2008 using an ASM-IV, which comprises a vertical array of OBS sensors mounted within a 1.44-m-long pole. The measurements reveal that a high-concentration mud layer begins to develop in mid-May, and reaches concentrations over 10 g/l (fluid mud) by August. SSCs are observed to be generally higher at spring tide than at neap tide. The fluid mud (SSCs 10 g/l) clearly responds to wave action: the calm period being characterized by a two-layer profile, whereas a gradational one-layer profile during the rough summer season. The fluid mud sheet blanketing the exposed flat is supposed to be semi-consolidated mainly by organic processes and solar radiation during low-water slack tide. The differential response of the fluid mud to the variable seasonal wave-energy conditions thus plays a key role in the rapid and widespread formation of ephemeral mud flats in the study area during summer. The available evidence, however, suggests that the summer mud sheet has a very low potential for preservation in the rock record.
机译：在沿着韩国西海岸的Duuri Macrotidal平板上，夏季厚度厚度为20厘米的泥板，并在以下冬季完全消除。迄今为止，这种循环季节沉积/泥质界面的泥土的腐蚀仍未得到合理的解释。为了阐明负责机制，使用ASM-IV将悬浮沉积物浓度（SSCs）的垂直轮廓从3月至2008年从3月到8月获得，该ASM-IV包括安装在1.44m长的杆内的垂直OBS传感器阵列。测量结果表明，高浓度泥层在5月中旬开始发展，并在8月份达到10克/升（流体泥浆）的浓度。观察到SSCs在春潮中通常比在NeAP潮处更高。流体泥浆（SSCS＆GT; 10 G / L）清楚地响应了波动作用：平静的时期被两层轮廓为特征，而在夏季的渐变期间渐变的单层轮廓。覆盖暴露的平面的液体泥浆板应该在低水分松弛潮汐过程中主要通过有机方法和太阳辐射进行半固结。因此，流体泥浆对可变季节波能量条件的差异响应在夏季期间在研究区域的短暂和广泛形成的短暂和广泛形成的关键作用。然而，可用的证据表明夏季泥板在岩石记录中具有非常低的保存潜力。

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