福建漳浦赤湖海岸沙丘沙粒度特征及其环境意义  

Grain-size Characteristics of Coast Dunes and its Climatic Environment Significance in Chihu Town,Zhangpu County,Fujian Province

作　　者：夏菁[1,2] 李志忠[1,3,2] 靳建辉[1,3,2] 王贤立[1,2] 龚松柏[1,2] 邓涛[1,2] 姜锋[1,2] 

机构地区：[1]福建师范大学地理科学学院,中国福州350007 [2]湿润亚热带山地生态国家重点实验室培育基地,中国福州350007 [3]福建师范大学地理研究所,中国福州350007

出　　处：《湖南师范大学自然科学学报》2014年第3期7-13,18,共8页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(41271031;41301012);中国科学院黄土与第四纪地质国家重点实验室开放基金资助项目(SKLLQG1113);福建省自然科学基金资助项目(2013J01153);福建省教育厅科技基金资助项目(JA11061);福建省公益类科研院所专项基金资助项目(2013R09);国家大学生创新创业训练资助项目(201310394019)

摘　　要：基于海岸变迁历史地图和区域典型气候记录对比建立了剖面的年代学标尺,采用Mastersizer 2000型激光粒度仪测试剖面沉积的粒度特征,以剖面粒度参数作为代替海岸带化学风化强度、冬季风强弱变化的主要指标.通过对福建漳浦赤湖海岸沙丘剖面（CH）粒度特征分析,发现该剖面沉积具有海岸波浪作用和风力作用联合作用沉积的粒度特点,因此其粒度参数可能记录了海岸沙丘发育时期的海岸带环境演变历史.将CH剖面记录的近2 000年以来的海岸带气候环境变化历史划分为4个时期.其中,581~740 AD和930~1260 AD两个阶段分别对应我国的隋唐暖期和欧洲中世纪暖期;741~907 AD唐朝中后期至五代冷期以及1261 AD以来至小冰期结束的两个阶段也和前人研究得出的两个冷期相当.Based on the coast change history map and the typical contrast of regional climate records,a geochronological scale of the profile was estabished.Grain size characteristics of the deposition in the section were tested using the Mastersizer 2000 laser granulometer,and the sizes parameters were regarded as the main proxy indicators of the chemical weathering intensity and the variations of coastal winter monsoon in the coastal zone.Through the analysis of the grain-size characteristics of the coast dune profile（CH） in Chihu of Zhangpu county,Fujian province,a particle characteristic of coastal wave action and wind action coupled deposition were found in the sedimentary section,so its grain-size parameters might record the coastal zone environmental evolution in the development stage of the coast dune.The climate change history recorded by CH profile can be divided into four periods in the past 2 000 years.The 581 ~ 740 AD and 930 ~ 1260 AD two periods correspond to Sui Warm Period in China and Medieval Warm Period in Europe,respectively.The results in the middle and later period of the Tang Dynasty and cold period of the Five Dynasties 741 ~ 907 AD and 1261 AD to the end of the Little Ice Age are also consistence with previous studies.

关 键 词：海岸沙丘 粒度参数 风力作用 环境演变 福建漳浦 

分 类 号：P532[天文地球—古生物学与地层学]