论文部分内容阅读
位于福建省东南沿海地区的长乐—诏安构造带(以下简称长—诏带),是一条自中生代形成以来经历过多期次强烈活动的深大断裂构造带,亦是一条强震活动带。由于本断裂带地处我国东部活动大陆地壳的边缘地带,同时又紧邻西太平洋巨型岛弧—海沟系中的台湾岛弧——现代构造运动最强烈的构造带,因而使长—诏带的地壳结构、岩浆活动、岩石—构造变动及其演化、地震地质等均有许多独特之处。本文仅就其新构造活动特征的成因机制作一初步分析与探讨。
The Changle-Zhao’an structural belt (hereinafter referred to as Chang-Chao belt) located in the southeastern coastal area of Fujian Province is a deep fault tectonic belt that has undergone intense periods of activity since Mesozoic era and is also a strong earthquake activity belt. Because this fault zone is located on the margin of the active continental crust in the eastern part of China and is also close to the island arc in the western Pacific giant arc-trench system, the strongest structural belt in the modern tectonic movement, the crust of the Chang-Chao belt Structure, magmatism, rock-structure changes and their evolution, seismic geology and so on have many unique features. This paper only makes a preliminary analysis and discussion on the genesis mechanism of its neotectonic activity.