摘要
对北京房山花岗闪长岩体中长石斑晶进行了系统测量,测点密度平均4.37个/km^2,测量标志为长石斑晶长轴长度和长石斑晶线含量等。对测得数据进行了分布统计、有序样品最优分割、和趋势变化分析等处理。揭示了长石斑晶在岩体中的分布规律和数学特征,划分了趋势岩相带,从而提出了较为合理的岩相带划分原则。
A systematical measurement has been made to the feldspar phenocrysts in granodiorite massif from Fangshan, Beijing. The average number of measurements-4.37 per km2. The elements of the measurement are the length and linear content of feldspar phenocrysts. The data processing on distribution statistics, the best division of ordering samples and the variation of trend have been conducted, which have revealed the distribution rule and mathematical characteristics of feldspar phenocrysts. Based on these analyses, a reasonable principle of defining lithofacies zones is proposed, and the trend-lithofacies zones are delineated.
出处
《地球科学》
EI
CAS
1987年第2期157-162,共6页
Earth Science
关键词
长石斑晶
岩相带
空间特征
数学特征
趋势面
feldspar phenocryst
lithofacies zone
space character
mathematical characteristics
trend surface
