摘要
本文以俄远东地区康捷尔型（钠质专属性特点）、依纳格林型（钾质专属性特点）同心环状碱性－超基性杂岩体为例，论述了该二种类型杂岩体的岩石学、岩石化学及地球化学、产出特征等。前者岩浆岩以 Na偏高为特征， K2O/Na2O=0.1～ 0.7(Na2O含量介于 1.7％～ 8.1％ )，并与金伯利岩、似金伯利岩密切共生，有时可能含有金刚石副矿物；后者类型岩浆岩以钾偏高为特征（ K2O／ Na2O=3.3～ 13.2） ,多产出于张性构造裂谷带或中生代地堑带，与之共生的有钾镁煌斑岩及类钾镁煌斑岩等。上述系列岩浆岩，在成因上与基性超基性岩石组合密切相关，并具有地幔生成特点。同时，不同类型岩浆岩的形成作用主要取决于构造背景之差异和地幔交代作用。
In Far East area of Russia,alkaline ultrabasic complex can be obviously divided into K type and Na type. Their petrological,petrochemical and geochemical characteristics and occurring features are discribed in detail in the paper.Na type magmatic rocks are characterized by Na high,K2O/Na2O=0.1－ 0.7(Na2O 1.7％－ 8.1％ ),closely coexisting with kimberlite,kimberlite like,sometimes containing diamond; K type magmatic rocks are characterized by K high,K2O/Na2O=3.3－ 13.2,mostly occurring in tensional rift zone or Mesozoic graben zone,coexisting with lamproite,lamproite like. On origin,the above mentioned magmatic rocks all are closely correlated with basic ultrabasic rock associations and have the characteristics of forming in the mantle.The forming of different types of magmatic rocks mainly depond on the differences of tectonic setting and the metasomatism in the mantle.
