玄武岩的构造环境判别

已有的玄武岩构造环境判别图解尚存在不少问题,主要表现在不准确性、多解性和矛盾性几个方面。综合利用这些图解,建立一个模糊数学模型,找出玄武岩构造环境判别的最佳方案被证明是可行的。玄武岩形成的构造环境主要有洋中脊(MORB)、火山弧(VAB)、大陆裂谷(CRB)和板内(WPB)四种。经过对各种构造环境众多数据的分析和计算,最后所建立的数学模型和相应的计算机程序,对典型构造环境数据的检验得到了满意的结果。

FUZZY-MATHEMATICAL MODEL FOR DISCRIMINATION OF TECTONIC ENVIRONMENTS FOR BASALTS

There is a confusion in discrimination diagrams of basalts for determining their tectonic environments. The confusion comes from inaccuracy,multi-variant solution and controversy. A fuzzy-mathematical model is set up by compositely using the diagrams, and a best program for discriminating tectonic environments is verified. The envh-onments for formation of basalts can be distinguished into four types:mid-ocean ridge, volcanic arc, continental rift and intraplate environments. By analysing and calculating data from these tectonic environments with the fuzzy-mathematical model and related computer program, a satisfactory result was obtained in examination of the typical tectonic environments.