冲绳海槽DGKS9603孔细粒沉积物元素组合特征及其意义

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

熊应乾¹,
刘振夏²

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
2.
国家海洋局, 第一海洋研究所, 山东, 青岛, 266061

基金项目: 国家自然科学基金资助项目(49776292,49576283,40176018)

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出版历程
- 收稿日期: 2002-04-19
- 修回日期: 2003-09-10

Variations in sediment provenance and its implications of Core DGKS9603 since the late Quaternary

XIONG Ying-qian¹,
LIU Zhen-xia²

1.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Ocean University of China, Qingdao 266003, China
2.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

摘要

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.
- 冲绳海槽 /
- 物源 /
- 古气候
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.
- Okinawa Trough /
- sediment provenance /
- paleoclimate

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