摘要
采用化学质量平衡法,分析双台子河口淤泥质沉积物的常量元素特征,并对沉积物来源进行了初步探析。结果表明:常量元素在沿拦海大坝由北至南方向上变化较为复杂,在向海离岸方向上Al2O3、CaO、TFe2O3、MgO等表现为岸边含量较高,向海方向上含量较低,SiO2的沉积分布与其相反。上述5种元素具有很好的相关关系,表明了河口沉积物以陆源沉积为主。河口沉积物主要来源于西拉木伦河上游上侏罗统地层区(Ⅱ区),该区贡献率达76.08%,其次为辽河下游第四系沉积物区(Ⅳ区),贡献率达17.10%。
The authors analyzed the features of major elements of muddy sediments in Shuangtaizi estuary using chemical mass balance method,and investigated the sources of sediments.The results showed that variation of major elements from north to south on the sea dam was complicated.The contents of Al2O3,CaO,TFe2O3 and MgO were relatively high on shore and relatively low off shore,while the distribution of SiO2 was in contradiction.The correlativity of these elements indicated that the sources of estuarine sediments are continental.The major source of estuarine sediments was the Upper Jurassic strata zone（Ⅱ） locating in upper Xilamulun Rive with the contribution rate of 76.08% and the minor one was the Quaternary sediments zone（Ⅳ） locating in lower Liao River with the contribution rate of 17.01%.
出处
《世界地质》
CAS
CSCD
2011年第1期46-50,84,共6页
World Geology
基金
辽宁省国土资源厅环境地质保护项目(3L1050714422)
关键词
淤泥质滩涂
常量元素
化学质量平衡法
贡献率
muddy sediment
major element
chemical mass balance method
contribution ratio
