Siderophile element concentrations in magnetic spherules from deep sea sediments revealed by instrumental neutron activation analysis
Siderophile element concentrations in magnetic spherules from deep sea sediments revealed by instrumental neutron activation analysis
复制标题
通过仪器中子活化分析揭示深海沉积物磁球中的亲铁元素浓度
DOI：
10.2343/geochemj.14.11
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
K. Yamakoshi
中科院分区：
文献类型：
--
作者：
K. Nogami;T. Shimamura;Y. Tazawa;K. Yamakoshi
为了确定深海沉积物中磁球的地外起源，采用仪器中子活化分析方法测定了Co、Ni、Ir和/或Au等亲铁元素。从太平洋中部疏浚的红粘土样品中收集了球粒。只选择表面光滑、比重相对较高的球粒进行分析。Co， Ni和It在大多数小球体中的存在表明这些小球体可能来自地外。目前还不清楚这些小球粒是进入地球大气层的铁陨石烧蚀的液滴，还是它们本身就是宇宙铁颗粒。x射线衍射分析表明，这些球体是材料快速冷却的产物。
For the purpose of deciding the extraterrestrial origin of the magnetic spherules found in deep sea sediments, the siderophile elements Co, Ni, Ir and/or Au etc., were measured by instrumental neutron activation analysis. Spherules were collected from red clay samples which were dredged from Mid Pacific Ocean. Only spherules which had smooth surfaces and relatively high specific gravities were chosen for analysis. Existence of Co, Ni and It in most spherules suggests the possibility of an extraterrestrial origin for these spherules. It is not clear whether these spherules are droplets ablated from iron meteorites entering into the Earth's atmosphere or they are cosmic iron grains themselves. X-ray diffraction analysis suggested that these spherules are the products of rapid cooling materials.