焦作矿区太原组宇宙尘的发现及其特征

<正> 宇宙尘的研究,有助于了解太阳系的起源与演化;有助于地层的划分与对比和估计沉积速率等。1876年莫雷(Murray)描述宇宙尘微球粒以来,一些科学家也在深海沉积物中发现了这种磁性微球粒,同时利用现代技术在高空中也收集到微球粒,证实了宇宙尘的存

Discovery of cosmic spherules from the Taiyuan Formation in the Jiaozuo area and its features

Cosmic spherules are important materials from outer planet.Studying cosmic spherules contributes to the knowledge of the origin and evolution of solar system.We found these cosmic spherules in the rocks of the Upper Carboniferous Taiyuan Formation in the Jiaozuo mining area while studying the limestone of coalfield These cosmic spherules are about 7 um in diameter and mostly spherical in outline.Their surfaces are ornamented with plicated, cracked, vesicular, warty, spherular,microlitic and polygonal structures.Through the energy spectral electronic probing analysis, we also found that the cosmic spherules from the limestone L2 of coalfield consist mainly of SiO2 and Al2O3, not bearing NiO.Thus, the spherules in this area are glassy cosmic spherules.