地球表层的环圈构造,是六十年代以来航天技术发展所带来的对地壳构造的一种新认识。这类构造,早在三十年代,就已经有人提出,这是火山活动形成的一种特殊的“中心型”构造。 浙江中生代陆相火山岩覆盖区的卫片解释和区测资料表明,一系列大小火山环圈构造,彼此包容、交切,在总体上构成火山环圈条带,且大部受区域构造所控制。构成火山环圈的每一构造单元——环圈构造,尽管它们所处的边界环境以及岩性等方面存在种种差异,表现出构造形迹展布的多样性和复杂性,但仍不失其共同的组合特征,即多重环状 The ring and ring structure on the Earth’s surface is a new understanding of crustal structure brought by the development of aerospace technology since the 1960s. Such structures, as early as the 1930s, have already been proposed as a special “central” structure formed by volcanic activity. Zonal interpretation and regional measurements of the Mesozoic volcanic rocks in the Mesozoic in Zhejiang show that volcanic ring structures of a series of large and small volcano enclaves intersect with each other and form volcanic ring bands in general and are mostly controlled by regional structures. Each of the structural unit-ring structures that make up the volcanic ring circle, despite the differences in the boundary conditions and lithology of the volcanic ring, shows the diversity and complexity of the structural footprint distribution, The combination of features, that is, multiple rings