试用矢量表示岩层真厚度

在野外地质测量工作中，岩层真厚度历来使用标量计算。文中证明：如果规定在导线前进方向上，凡是自下部向上部测得的岩层真厚度为正厚度，反之则为负厚度，可以使用公式Ｍ＝Ｌ·［ｓｉｎβ·ｃｏｓε·ｃｏｓ（－λ）＋ｓｉｎε·ｃｏｓβ］进行岩层真厚度计算。该公式各参数的取值范围与野外实测剖面过程中各数值可能出现的范围相同，而且所有数据均可直接取于野外实测剖面数据记录表，不需要对数据作任何处理，计算过程简单准确。其计算结果不但可得出岩层的真厚度，而且还可真实地反映出岩层之间的上下关系，从而使岩层厚度具有矢量性质。

THE USE OF THE VECTOR IN EXPRESSING THE TRUE THICKNESS OF STRATA

The true thickness of strata is conventionally calculated by using the scalar quantity in the field survey.In the paper it is proved that the true thickness of strata may be calculated by using M= L ·[sin β ·cos ε ·cos（ -λ ）+sin ε ·cos β ]if the true thickness of strata measured from the lower part upward along the traverse is regarded as the positive thickness while that measured form the upper part downward is regarded as the negative thickness.The ranges of values of the parameters in the formula are the same as those that may possibly appear in the field measurement of the section and all the data can be obtained directly from the records of the measured section.No data processing will be made and the calculation is simple and accurate.Through the calculation not only the true thickness of strata can be obtained but the relation between the upper and lower strata can be also reflected truely;so the thickness of strata has the nature of a vector.