一、前言煌斑岩以其分布广泛,成分复杂和种类繁多为其特色之一。其含硅量变化很大,多数近于中一基性火成岩,少数则和超基性火成岩相近。此外,它们还含较多的挥发份(H_2O、CO_2等),全碱和铁镁及磷也高(表1附后),所以煌斑岩常有含水铁镁矿物发育,磷灰石很普遍,水热交代变化极常见。 I. Preface Lamprophyre is one of its features with its wide distribution, complex composition and wide variety. The amount of silicon varies greatly, most of them are near the basic one igneous rocks, and a few are similar to the ultrabasic igneous rocks. In addition, they also contain more volatile matter (H 2 O, CO 2, etc.), all the alkali and iron magnesium and phosphorus are also high (Table 1 attached), so the lamprophyre often hydrous iron magnesium mineral development, apatite is very common , Hydrothermal exchange of changes is extremely common.