一、前言近年来对该区侵入岩做了许多工作;但对岩浆岩的侵入时代及演化规律等许多问题仍存在着爭论。对该区广泛发育的各种中—酸性侵入岩类,过去有认为是多次侵入活动所形成的,但确切的地质证据未见报导。此外,也有认为它们之间呈过渡关系,是同源 I. Preface Much work has been done on invaded rocks in this area in recent years. However, there are still many controversies over the age and evolution of magmatic rocks. Various medium-acidic intrusive rocks widely developed in the area were previously thought to have been formed by multiple intrusions, but exact geological evidence has not been reported. In addition, they also think that there is a transitional relationship between them and they are homologous