| 摘要: |
| 2003年中国海底热液硫化物调查航段在EPR西侧取得了 E271与E272站位的小箱体柱状样品,通过对这些样品采用酸化和未酸化两种前处理方法的粒度分析,结果表明样品受热液活动影响不强烈;粒度分布曲线表 现为多峰分布,为多种物源共同叠加沉积的结果,其中以生物源与火山源为主。因此该地区的沉积物源虽然有热液活动的贡献,但是较其它来源的沉积物所占的比例 较小。 |
| 关键词: 东太平洋海隆(EPR) 热液活动 沉积物 粒度 |
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| 基金项目:国家自然科学基金资助项目(40376020,40176020);中国科学院知识创新工程重要方向项目(KZCX3-SW-223) |
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| Grain-size characteristics of sediments near hydrothermal fields at East Pacific Rise 13°N |
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| Abstract: |
| We decided the grain-size of sediments, which was got with boxing during Chinese hydrothermal sulfide investigation cruise at East Pacific Rise in 2003, and achieved the study of Grain-size characteristics of sediments. The results show that the sediments were affected weakly by hydrothermal activities.The curves of grain-size exhibited multi-apex distributions which were an outcome by multi-origins folding. Among the origins, the biological and volcanic resources are main components. The local sedimental origin was the hydrothermal activities’ contributions, but the contributions from other sedimental origins were more than that of hydrothermal activities. |
| Key words: East Pacific Rise(EPR) hydrothermal activity sediment grain-size |
