摘要
海水、海洋沉积物中的自生组分、生物壳体乃至全岩的Ｎｄ同位素组成（１４３Ｎｄ／１４４Ｎｄ或∈Ｎｄ）可以反应大洋水体和沉积物的来源及大洋水体循环特征，因而具有重要的地质意义。在综合近２０年来关于现代世界大洋海水、Ｆｅ－Ｍｎ沉积、热液、热液沉积物及其它组分的Ｎｄ同位素的研究资料基础上，总结了不同洋区、不同深度海水的Ｎｄ同位素组成特征及其控制因素；同时，依据Ｆｅ－Ｍｎ结壳及岩心中有孔虫的Ｎｄ同位素组成资料，总结了新生代以来世界海洋中Ｎｄ同位素的变化规律和古海水的演变历史；进一步探讨了研究中存在的问题和发展趋势。
The isotopic compositions of neodymium( 143 Nd/ 144 Nd or ∈Nd)of seawater,authigenic minerals,biogenic debris and bulk sediments can be used as tracers for determining sources of water masses and other materials,and for water exchange in oceans.Based on the previous data in last 20 years,we summed up the characteristics of isotopic compositions of Nd of seawater,Fe Mn deposits,hydrothermal vent fluids,hydrothermal sediments and other materials.The values of ∈Nd are different in the Pacific,the Atlantic and the Indian Ocean,and changed with depth of water in same area.According to the data of ∈Nd in Fe Mn crust section and foraminiferas in cores,the oceanic evolution of world ocean in Cenozoic has been discussed.We also approached the main problems which would appear in studies and research trends in the near future.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1998年第4期35-42,52,共9页
Marine Geology & Quaternary Geology
基金
国家自然科学基金
中国大洋矿产开发协会资助项目
关键词
海洋环境
同位素组成
钕
地质意义
水体
大洋
oceanic environment Nd isotopic composition material source oceanic water evolution
