CAJ | 학술논문

　　为了研究灌河口海区的沉积环境,利用激光粒度仪对位于灌河口的柱状样 GH-1孔进行了沉积物粒度分析,根据粒级-标准偏差方法对此柱状样的环境敏感粒级进行了计算,并结合对粒度概率曲线图的分析来对该区域进行沉积环境的研究,从而探讨了该环境敏感粒度组分的环境指示意义。在研究区内确定环境敏感粒度组分为250~32μm,32~16μm,代表沉积过程中的两种动力机制,分别是风暴流和沿岸流。通过该柱状样的210Pb测年可以得到沉积速率和沉积环境的变化,上段沉积速率较大为1.9 cm/a,下段20 cm沉积速率较低为0.4 cm/a。
　　위료연구관하구해구적침적배경,이용격광립도의대위우관하구적주상양 GH-1공진행료침적물립도분석,근거립급-표준편차방법대차주상양적배경민감립급진행료계산,병결합대립도개솔곡선도적분석래대해구역진행침적배경적연구,종이탐토료해배경민감립도조분적배경지시의의。재연구구내학정배경민감립도조분위250~32μm,32~16μm,대표침적과정중적량충동력궤제,분별시풍폭류화연안류。통과해주상양적210Pb측년가이득도침적속솔화침적배경적변화,상단침적속솔교대위1.9 cm/a,하단20 cm침적속솔교저위0.4 cm/a。
In order to explore the deposition environment of the Guanhe Estuary, grain-size analysis of sediment GH-1 drilling, retrieved from Guanhe Estuary, was carried out by using a Malvern 2000 grain-size analyzer. The environmentally sensitive grain size components were calculated according to variations in the grain-size standard deviation. The deposition environment was studied combined with the analysis of grain size probability curve. At the same time, the environmental implications were discussed. Two environmentally sensitive grain-size compo-nents, 250~32 μm and 32~16 μm, were identified, representing two dynamic mechanisms in the process of sedi-mentary, storm flow and coastal current. The variation of deposition rate and sedimentary environment can be ob-tained by using the 210Pb technique. The results show that the deposition rate was larger at 1.9 cm/a, and the deposi-tion rate of the last 20 cm was smaller at 0.4 cm/a.