Li Jingxi, Sun Chengjun, Zheng Li, Yin Xiaofei, Chen Junhui, Jiang Fenghua
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao, Shandong 266061, China.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao, Shandong 266061, China; Laboratory of Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
Mar Pollut Bull. 2017 Jan 30;114(2):1103-1109. doi: 10.1016/j.marpolbul.2016.10.016. Epub 2016 Oct 13.
The geochemistry of rare earth elements (REE) in surface sediment from Cuarteron reef (N1), Johnson reef (N2), Hugh reef (N3), Gaven reef (N4), Fiery cross reef (N5), and Subi reef (N6) were firstly studied. The total REE abundance (∑REE) varied from 2.244μg·g to 21.661μg·g, with an average of 4.667μg·g. The LREE/HREE was from 2.747 to 9.869, with an average of 3.687, which indicated that the light REE was evidently enriched. Fractionation was observed between LREE and HREE. Gd with a negative anomaly was also detected in all of the stations. The negative anomalies of δEu from 0.11 to 0.25, with an average of 0.22, and the positive anomalies of δCe from 1.38 to 3.86, with an average of 1.63. The REE individual correlation values with Ca, Mn, Mg, Sr were r=-0.05, r=0.26, r=-0.14, and r=0.08.
首次对半月礁（N1）、华阳礁（N2）、永暑礁（N3）、南薰礁（N4）、赤瓜礁（N5）和渚碧礁（N6）表层沉积物中的稀土元素地球化学特征进行了研究。稀土元素总量（∑REE）在2.244μg·g至21.661μg·g之间变化，平均为4.667μg·g。轻稀土/重稀土比值在2.747至9.869之间，平均为3.687，表明轻稀土明显富集。轻稀土和重稀土之间存在分馏现象。所有站位均检测到具有负异常的钆。δ铕的负异常值在0.11至0.25之间，平均为0.22；δ铈的正异常值在1.38至3.86之间，平均为1.63。稀土元素个体与钙、锰、镁、锶的相关系数分别为r = -0.05、r = 0.26、r = -0.14和r = 0.08。
