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近几年来,随着地质工作实践的不断深入,陆续发现有些历来认为是“断层角砾岩”、“火山角砾岩”的岩石,实际上是岩浆地下爆发成因的角砾岩体。由于这种认识上的飞跃,相应地扩大了一些老矿区的找矿远景,增加了矿石的储量,从而对控矿构造乃至矿床的成因也有了新的看法。华东火山岩区还发现某些曾定为“花岗斑岩”、“凝灰熔岩”的岩石,实际上也是地下爆发侵入性质而具有碎斑结构的岩石,也与某些矿产有关。因此发现与研究这类爆发角砾岩,不仅具有找矿的现实意义,而且对于认识火山爆发作用与侵入作用之间的联系,讨论岩浆浅部运移的机理等问题,也有重要的理论意义。
In recent years, with the continuous deepening of geological work practices, one after another found that some have always been considered as “fault breccia”, “volcanic breccia” of the rock, in fact, is the cause of magma underground breccia body. Due to this leap of understanding, correspondingly, the prospecting prospect of some old mines has been enlarged and the reserves of ore have been increased, so as to have a new view on the genesis of ore-controlling structures and even the deposit. Some volcanic rock areas in East China also found some rocks that had been designated as “granite porphyry” and “tuff lava”. They are actually rocks with crustal structure that broke out in the underground and are also related to some minerals. Therefore, discovering and studying such outbreak breccias not only has the realistic significance of prospecting, but also has important theoretical significance for understanding the connection between volcanic eruption and intrusive action and discussing the mechanism of shallow magma migration.