Displacements and the Siljan Ring Structure
Displacements and the Siljan Ring Structure
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位移和 Siljan 环结构
DOI：
10.1080/04353676.1981.11880047
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发表时间：
1981
影响因子：
1.5
通讯作者：
F. E. Wickman
中科院分区：
文献类型：
--
作者：
F. E. Wickman
撞击构造的形成过程通常分为两个阶段。在第一个阶段，形成一个短暂的陨石坑，这个阶段的特点是离心位移。第二阶段，修改阶段，其特征是向心位移。因此，在一般只能观察到移位的区块和巨型区块的大型侵蚀影响结构中，地质研究应针对单独的区段进行，而不是将整个结构作为一个单元进行（“区段原则”）。从这个角度讨论了西尔扬环形构造的地质观测。
The formation process of an impact structure is usually divided into two stages. During the first one a transient crater is formed, this stage is characterized by centrifugal displacements. The second stage, the modification stage, is characterized by centripetal displacements. Accordingly, in large eroded impact structures, where in general only displaced blocks and megablocks can be observed, geological studies should be made on separate sectors, not on the whole structure as a unit (the "sector principle"). Geological observations in the Siljan ring structure are discussed from this point of view.