高压合成的Mg-Fe-Mn-Al榴石系列的研究

对高压下合成的12个Mg-Fe-Mn-Al榴石系列矿物样品进行X射线衍射和红外光谱研究,获得了该系列矿物晶胞参数、红外吸收带频率与化学成分关系的系统资料。并根据人工合成石榴子石的压力和天然石榴子石的产状,讨论了当研究具有复杂成分的天然石榴子石时,应将Al离子优先与Mg、Fe离子组成端元组分,而Cr离子优先与Mn、Ca离子结合。     

几种人造碳的微结构的高分辨电子显微镜研究

用高分辨电子显微镜研究了在不同温度下加热处理的几种人造碳的微结构。当石墨化碳被加热到不同温度时,其微结构也不同。在结晶的最初阶段,它由小的取向混乱的碳原子层组成,加热到大约1000℃时,涡流层构造开始形成,到大约1600℃,所有的碳原子层都成涡流层构造,超过这一温度时,碳原子层开始按石墨构造堆砌。实验结果还表明,碳原子层的层间距随温度的升高而减小,最后趋近于石墨的(0002)面间距。     

远程教育系统中卫星小站的防雷电设计

分析了雷电引入卫星小站系统的途径,阐述了卫星小站系统的防雷电措施,提出了构筑完整防雷体系保护系统设备的方法。     

TRANSALP—Cross-line recording during the seismic reflection transect in the Eastern Alps

Cross-line recording formed a companion experiment of the TRANSALP seismic reflection transect through the Eastern Alps, conducted by partner institutions from Austria, Germany and Italy in three field campaigns in the period fall 1998 to fall 1999. Besides of the originally expected three-dimensional control for the north–south running main transect, additional information on seismic anisotropy and alternative images of crucial parts of the main transect could be gained.Conventionally processed sections along N–S running common-midpoint (CMP) binning lines confirm and strengthen the predominance of midcrustal reflective structures of the ‘Sub-Tauern-Ramp’ beneath and south of the Tauern Window. Velocity analysis of the first arrivals exhibit about 10% higher velocities in east–west propagating P-waves, compatible with texture-dominated rock anisotropy, recorded on cross-lines at the Tauern Window. Pre-stack depth migration of cross-line recordings shows dominant south dip of the Sub-Tauern-Ramp with easterly dip components and a sub-horizontal root zone of the Sub-Dolomites-Ramp.     

磁异常数据处理方法的应用

文章以冀东一些铁矿区地面磁测成果为例，总结了磁异常转换、定量解释推断一些方法的应用及效果。