摘要
通过对230余幅元素分布类型图的分析,将煤和岩石中的伴生元素划分为原生型(服从正态分布)、叠加型(服从对数正态分布)、流失型(服从负偏斜对数正态分布)、再生型(呈非正态分布)和复合型(呈混合态分布)等五种成因类型。
Some representative coal beds of the Late Permian coal-bearing formation in southwestern China were chosen as the best candidates to study the genetic distribution types of associated elements in coal.By simulating the practical frequency distribution curve for an element in a certain geological body with the theoretical probability density distribution curve and after analyzing the simulation degrees of more than 230 graphs drawn by the computer (PC-1500), the associated elements in coals and rocks were classified as five genetic types: the 'original type', obeying the normal distribution; the 'added-in type', obeying the log normal distribution; the ' washed -off type', obeying the log normal distribution of negative skewness; the 'reconstructive type', obeying the non-normal distribution; and the 'complex type', obeying the multiple! distribution. Each type has a certain genetic meaning as the name suggests.
出处
《地球化学》
CAS
CSCD
北大核心
1990年第1期64-71,共8页
Geochimica
