燕山某地新型富钾岩石物质组成及其成因

1960年在燕山地区发现了一种新型富钾岩石,其 K₂O 含量可高达16.68%,分布颇广,层位稳定,厚度大,矿物成分简单,据了解它们不但可成为陶瓷、玻璃、耐火和化工等工业原料,而且经过初步试验证明有可能成为制取钾肥的新的原料来源。由于此种岩石有很大的特殊性,可能是一种新的沉积岩类型,因而进行深入的研究不但有其实际意义,而且对于了解钾的化学地史、燕山震且系沉积特点、后生作用（包括变生作用）对钾等有用元素富集的意义及讨论成矿元素物质来源等都有很大意义。1962年笔者曾与陈开惠同志一道去野外进行调查,回室后在叶连俊教授的关切和指导下,对共物质组成进行了研究。整个工作中曾多次得到范德廉、陈志明、杨培基、戴永定和李继亮等同志热情的帮助。

COMPOSITION AND ORIGIN OF A NEW TYPE OF K-RICH ROCK FROM YENSHAN

The occurrence,composition and texture of an exogenetic k-rich rock of new type was described.There exist two kinds of k-rich rock,one is mainly constituted by potash felds- par containing about 13 to 16 per cent of K2O,and the other is dominately composed by hydrous mica containing slightly less amount of K2O than the former.Minerals of these rocks show very fine grains and irregular fringes.These rocks were formed in shal- low,limited and stagnant water basin.They were found in the middle part of Early Sinian cyclothem of very great thickness.It is belived that these rocks might have some practical significance in expanding potassium materials.