钾玄质岩石的判别、成因及构造环境

Discrimination, Genesis and Tectonic Setting of Shoshonitic Rock

钾玄质岩石组合是一套成分上Si O2接近饱和状态,适度富碱、K元素相对富集,并且Fe元素较为贫乏的特殊岩石组合,是亚碱性系列(钙碱性以及拉斑系列)与碱性系列之间的过渡型系列岩石组合。总结了钾玄质岩石的判别特征、物质来源岩石成因以及岩石形成的构造背景。由于钾玄质岩石在探讨岩石成因以及还原区域构造演化过程研究中都具有重要的意义,而且钾玄质岩石是重要的找矿标志,使得这类岩石组合近年来受广泛关注。

Shoshonite combination is a Si O2 close to saturation, moderate alkali-rich, relatively rich in K, and Fe-poor rock combination; belonging to sub-alkaline series（including tholeiitic and calc-alkaline series） between alkaline series transition type. This paper summarizes the main characteristics distinguish shoshonitic rock material sources petrogenesis and tectonic setting. Because shoshonitic rocks have a special meaning in Genesis science and regional tectonic evolution of the rocks, and is an important symbol of prospecting, so more attention to this combination of rock in recent years.