排序方式: 共有5条查询结果,搜索用时 0 毫秒
1
1.
Evidence for warmer event from quartz grains in the soil of Grove Mountains,East Antarctica 下载免费PDF全文
<正> The cold desert soil has been discovered at first time in southern ridge ofMount Harding,Grove Mountains of interior East Antarctica Ice Sheet.Based on themicro structural observation,dominant characteristics of quartz grains include:dis-tinct surface stria and fractures,and clean features of frost action at both of crystalmargins and micro crannies of quartz grains.These features show a pedogenesis envi-ronment of few water,short transportation and frost action,revealing a warmer climat-ic event existed in this region. 相似文献
2.
3.
在矿物变化研究工作中,配接有 X 射线能谱仪的扫描电镜,能直接观察矿物变化过程中所发生的微观现象和新形成矿物的特点,并且可以同时确定其化学元素组分及相对含量变化。本文着重介绍长石在不同环境条件下,变化形成高岭石、多水高岭石、水云母及水云母—蒙脱石过渡型矿物的微观进程,并作了一些分析探讨。 相似文献
4.
张汝藩 《矿物岩石地球化学通报》1991,(4)
扫描电镜在国外已被广泛用于矿物分析研究工作。我国地学界在七十年代初引进扫描电镜,国产扫描电镜从1975年开始批量生产。目前,扫描电镜可以清晰观察粒径为微米级的矿物(最小可至1微米),同时可以迅速分析出矿物的主要化学元素组分。近几年来,我们用配接有TN-5400型X射线能谱仪的KAD-1000B型扫描电镜(分辨率为60A)观察分析了上百种矿物,发现了一些很有意义的微观现象,对这些现象进一步分析研究,将会对矿物学的发展起重要促进作用。 相似文献
5.
The cold desert soll has been discovered at first time in southern ridge of Mount Harding, Grove Mountains of interior East Antarctica Ice Sheet. Based on the micro structural observation, dominant characteristics of quartz grains include: distinct surface stria and fractures, and clean features of frost action at both of crystal margins and micro crannies of quartz grains. These features show a pedogenesis environment of few water, short transportation and frost action, revealing a warmer climatic event existed in this re, on. 相似文献
1