摘要
用显微镜、电子探针和扫描电镜等分析技术,对2008年"KX08-973"航次中国首次在东马努斯海盆PACMANUS热液区用拖网取得的少量Si-Fe-Mn氧化物海底热液产物样品进行显微结构特征研究。研究表明,显微镜下,样品呈隐晶质结构;扫描电镜下可见已石化的硅藻;电子探针分析结果显示,Fe和Mn的分布具有明显的分带性,呈现出Si-Mn质层被Si-Fe质层包裹的特征,反应了Si-Fe-Mn氧化物的形成具有多期多阶段性特征。样品是富Si,Fe和Mn的低温热液流体直接沉淀产物。本研究结果对该区热液氧化物的进一步研究,如Si-Mn质层和Si-Fe质层中Si与Mn和Fe的化合方式、微生物在热液氧化物形成过程中的作用具有指导意义。
With optic microscope, electronic probe and scanning electron microscope analytical methods, the microstrueture of the Si-Fe-Mn oxide, which had been collected by trawl during the expedition of ＂KX08-973＂ on the PACMANUS hydrothermal field, Eastern Manus Basin, in 2008 was analyzed. The Si-Fe-Mn oxide exhibited cryptocrystalline texture under optic microscope; and fossilized diatoms were found under scanning electron microscope. The electronic probe results revealed that the distributions of Fe and Mn were zoned and manifested the characteristics of Si-Mn layer enveloped by Si-Fe layer, reflecting a multi-staged formation of the Si-Fe-Mn oxide. The Si-Fe-Mn oxide was a result of direct precipitation of low temperature hydrothermal fluid, which rich in Si, Fe and Mn. This study will facilitate further research of Si-Fe-Mn oxide in this hydrothermal field, such as the combining of Si with Mn and Fe in the Si-Mn layer and Si-Fe layer and the role of the microbes during the forming of the Si-Fe-Mn oxide.
出处
《海洋科学》
CAS
CSCD
北大核心
2010年第8期69-75,共7页
Marine Sciences
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-211,KZCX3-SW-223)
国家自然科学基金项目(40830849,40976027,40906029)
山东省自然科学杰出青年基金项目(JQ200913)
