CAJ | 학술논문

本研究分别在平潭青峰、坛南湾和闽江口琅岐岛采集18个老红砂样品、19个海滩砂样品以及40个河滩砂样品，并对这些样品进行粒度和稀土元素（ REE ）测量。结果发现老红砂与闽江口琅岐岛河口砂的稀土元素含量特征十分接近；分别对老红砂与闽江河口砂REE数据以及坛南湾海滩砂与闽江口砂（ REE ）进行了判别函数分析，老红砂的∑REE 平均值为84.25μg/g，琅岐岛河口砂的∑REE 平均值为89.81μg/g，相似性明显；坛南湾海滩砂的∑REE平均值为16.41μg/g，与闽江河口砂含量差别较大。研究表明：青峰老红砂沉积物主要来源于闽江口河口砂，末次间冰期暖湿气候下闽江输砂量增大，河口外沿岸流增强，大量河砂进入海坛海峡，在强劲的季风搬运下，沉积于平潭岛北部，形成以青峰为代表的平潭岛北部老红砂；而坛南湾海滩砂代表海洋波浪搬运的泥沙，不是老红砂的物源。
본연구분별재평담청봉、단남만화민강구랑기도채집18개로홍사양품、19개해탄사양품이급40개하탄사양품，병대저사양품진행립도화희토원소（ REE ）측량。결과발현로홍사여민강구랑기도하구사적희토원소함량특정십분접근；분별대로홍사여민강하구사REE수거이급단남만해탄사여민강구사（ REE ）진행료판별함수분석，로홍사적∑REE 평균치위84.25μg/g，랑기도하구사적∑REE 평균치위89.81μg/g，상사성명현；단남만해탄사적∑REE평균치위16.41μg/g，여민강하구사함량차별교대。연구표명：청봉로홍사침적물주요래원우민강구하구사，말차간빙기난습기후하민강수사량증대，하구외연안류증강，대량하사진입해단해협，재강경적계풍반운하，침적우평담도북부，형성이청봉위대표적평담도북부로홍사；이단남만해탄사대표해양파랑반운적니사，불시로홍사적물원。
The 18 old red sand samples , 19 beach sand samples and 40estuary sand samples were col -lected in Qingfeng of Pingtan County , Tannan Bay and Langqi Island of Minjiang estuary , and the grain size and content of rare earth elements (REE) of the samples were measured .Results show that major features of these old red sand samples are rather close to the sand in Minjiang estuary .Further a-nalysis of the REE data using discriminated function shows that the ∑REE average of old red sand is 84.25 ug/g, the ∑REE average of estuary sand is 89.81 ug/g, which have obvious similarity .And the ∑REE average of beach sand is 16.41 ug/g, being very different from the estuary sand .Our study indicates that the old red sand of Qingfeng comes mainly from Minjiang estuary .During last interglacial period, with the increase of coastal current , a great number of river sand was sent into the Haitan Channel and kept depositing to the north of Pingtan Island , causing the formation of old red sand in Pingtan island , especially the Qingfeng old red sand .And the sand of Tannan bay was transported by ocean wave , not causing the formation of so called old red sand .