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一、前言岩石化学换算及编码是区调、科研方面应用很广的一项基础工作。在标准矿物换算上,国内、外比较流行的算法和电算程式多采用C·I·P·W法,但里特曼法建立在统计或然性处理基础上,其标准矿物与岩石实际矿物可比性强,是目前岩石化学换算法中最好的一种,但计算步骤繁杂而难以推广。本文的电算方法系笔者将里特曼法(A·Rittmann,1973)中大量图表进行数学处理后提出的一种程序,经与原著12个算例138个标准矿物含量比较,平均相对误差为4.73%,这种误差包括中间值取整数及运算位数不同在内。一般说本程序更为精确,另经实践手工计算一例岩石约需1—3小时,用本程序只需1—2分钟,极大提高了工作效率。
I. Introduction Rock chemistry conversion and coding is a key area, a wide range of scientific research a basic work. In the standard mineral conversion, the more popular domestic and foreign algorithms and computer programs using C.I.PW method, but the method based on the statistical Litigation Rittmann process, the standard mineral and rock actual mineral Comparability is the best of the rock chemistry conversion method, but the calculation steps are complicated and difficult to promote. The calculation method of this article is a kind of program proposed by the author after mathematics treatment of a large number of charts in Ait Rittmann (1973). Compared with 138 standard mineral contents in the original 12 cases, the average relative error is 4.73%. Such errors include the difference between the median and the number of digits. Generally speaking, this program is more accurate, and the other by hand to calculate a rock about 1-3 hours, using this program only 1-2 minutes, greatly improving work efficiency.