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冲绳海槽DGKS9603孔细粒沉积物元素组合特征及其意义
引用本文:熊应乾,刘振夏.冲绳海槽DGKS9603孔细粒沉积物元素组合特征及其意义[J].海洋学报,2004,26(2):61-71.
作者姓名:熊应乾  刘振夏
作者单位:1.国家海洋局, 第一海洋研究所, 山东, 青岛, 266061;中国海洋大学, 海洋地球科学学院, 山东, 青岛, 266003
基金项目:国家自然科学基金资助项目(49776292,49576283,40176018).
摘    要:通过对冲绳海槽DGKS9603孔柱样高密度取样,提取样品中小于2μm的黏土粒级组分,利用ICP-AES进行常、微量元素含量分析后,再经多种方法处理数据,发现该孔沉积物物源时段分明:距今45~43ka以生物源作用为主,距今43~41ka以火山作用为主,距今41.0~11.2ka以陆源作用为主,距今11.2~0.0ka以生物源作用为主.元素和氧化物含量的垂向变化主要受古气候、古环境变化的影响.DGKS9603孔沉积物元素地球化学特征清晰地记录了E3,YD,H1,LGM,H2,H3,H5七次变冷事件,并表明该孔很可能受到了A,B,C三次火山事件的影响.

关 键 词:冲绳海槽    物源    古气候
文章编号:0253-4193(2004)02-0061-11
收稿时间:2002/4/19 0:00:00
修稿时间:2003/9/10 0:00:00

Variations in sediment provenance and its implications of Core DGKS9603 since the late Quaternary
XIONG Ying-qian and LIU Zhen-xia.Variations in sediment provenance and its implications of Core DGKS9603 since the late Quaternary[J].Acta Oceanologica Sinica (in Chinese),2004,26(2):61-71.
Authors:XIONG Ying-qian and LIU Zhen-xia
Affiliation:1.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Ocean University of China, Qingdao 266003, China2.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Abstract:After using ICP-AES to analyze clay fraction of the samples of Croe DGKS9603 which was taken from the middle Okinawa Trough, the conclusions are obtained as follows: the down variation of the element contents is caused by the paleoclimate and paleoenvironmental evolution; its material source varies clearly, biogenic source is the major source during 45~43 and 11.2~0 ka BP respectively; volcanic source is dominant during 43~41 ka BP and epicontinental source is the most important provenance during 41~11.2 ka BP.Additionally, the seven cold events E3, YD, H1, LGM, H2, H3, H5 are recorded clearly in Core DGKS9603, and the core is probably influenced by three volcanic events A, B, C.
Keywords:Okinawa Trough  sediment provenance  paleoclimate
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