西藏泽当地区的宇宙尘
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:


Cosmic Spherules from Zedang, Xizang (Tibet) in China
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    Abstract:

    The cosmic spherules have been found from heavy fraction of placer near the Luobu ultramafic rock body in Zedang, Xizang. According to their charac- teristics of surficial texture and the compositions, the spherules can be divid- ed into two groups: silicate and iron. They are similar to those from present- day deep-sea, sediments and ancient strata. The iron spherules are characterized by distinctive surficial textures, such as wrinkled, air-etched, break-cracked and buttonlike. Most of the iron spheru- les discovered in this area are dominantly globular, black in colour and with metallic luster. They possess black fusion crust and weak megnetism. The dia- meters of spherule range from 0.05 to 1 mm. Some particles are polylayered in cross section. The outmost fusion crust is composed of magnetite; the inte- rior of wllstite. The core is of Ni-Fe metal. The silicate spherules are less abundant. They are also globular with smooth surface of weak magnetism, and may be divided into two types:colourless- transparent and brown-subtransparent. We suggest that most of the iron and silicate spherules might be the drop- lets sprayed from the fusion crust of a meteorite as it ablates by grazing in atmosphere, or these spherules would have been produced by extrusion of the lunar volcano.

    参考文献
    相似文献
    引证文献
引用本文

梁日暄,宛传永,王炳熙,彭佑华,1982,西藏泽当地区的宇宙尘[J].岩石矿物学杂志,1(3):1~8.,1982,Cosmic Spherules from Zedang, Xizang (Tibet) in China[J]. Acta Petrologica et Mineralogica,1(3):1~8.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期:
  • 出版日期: