闪电熔岩的形态、成分及其与类似天然物质的对比

发布时间：2018-08-15 11:24

【摘要】：闪电熔岩是由于闪电击中地表,瞬间高温使矿物熔融后凝结而成的天然玻璃质岩石.由于标本的稀缺性,国内在该方面的研究几近空白.研究采用CT扫描、三维立体成像技术和电子探针等多种观察仪器,揭示了砂质管状闪电熔岩的内、外部结构特征:玻璃质管壁外表面粗糙且形态复杂,内表面光亮且颜色与外表面不同,管壁内部含大量微小气孔,管道内部可以分为完全贯通、局部堵塞和完全封闭等状态;利用电子探针测定了闪电熔岩的成分:SiO_2含量极高,几乎为纯净的玻璃质,仅含有极少量其他金属元素;进一步对比了闪电熔岩、火山玻璃和玻璃陨石在外观、内部结构及成分上的区别,并验证了内蒙古地区类似管状岩石不是闪电熔岩.本研究对闪电熔岩这种罕见的天然物质进行了初步观测,为今后对闪电熔岩更多的科研应用提供基础参考.
[Abstract]:Lightning lava is a natural vitreous rock formed by lightning hitting the earth's surface and condensing the mineral by instant high temperature. Due to the scarcity of specimens, the domestic research in this area is almost blank. By means of CT scanning, three-dimensional imaging and electron probe, the internal and external structural characteristics of sandy tubular lightning lava are revealed: the outer surface of glass tube is rough and the shape is complex. The inner surface is bright and the color is different from that of the outer surface. There are a lot of tiny pores in the inner wall of the pipe, which can be divided into three states: complete penetration, local blockage and complete sealing. The composition of the lightning lava, is determined by electron probe, and the content of the composition: Sio _ 2 is extremely high. Almost pure vitreous, containing only a very small amount of other metal elements; further contrasts the differences in appearance, internal structure and composition of lightning lava, volcanic glass and glass meteorite, It is verified that the similar tubular rocks in Inner Mongolia are not lightning lava. In this study, lightning lava, a rare natural material, has been preliminarily observed, which provides a basic reference for more scientific research and application of lightning lava in the future.
【作者单位】：中国人民大学附属中学;中国科学院古脊椎动物与古人类研究所;
【基金】：国家自然科学基金(No.41772006)
【分类号】：P584

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