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为了给地震地质工作提供地质背景资料,我们对渤海周边地区构成结晶基底的前震旦纪变质岩系、地质构造及各时代的岩浆活动做了初步分析和探讨。一、本区构造单元的划分本文所涉及的范围大致在北纬36°至42°、东经114°至123°之间。位于中朝地块的中部。区内较著的深断裂有:1.康保—围场—赤峰深断裂,2.赤城—隆化—建平深断裂,3.昌平—遵化—迁西深断裂,4.太行山东侧深断裂,5.沈阳—郯城—庐江深断裂。其中有的已被查明为航磁异常带和重力梯度带。它们控制了太古代(桑干期)以后的岩浆活动
In order to provide geological background information for seismic and geological work, we have conducted preliminary analysis and discussion on the former Sinian metamorphic rocks, geological structures and magmatic activities of various epochs that constitute the crystalline basement in the area around Bohai. I. Division of Tectonic Units in this Area The scope covered in this paper is roughly between 36 ° and 42 ° North Latitude and 114 ° to 123 ° East longitude. Located in the middle of the plot of North Korea. Significant deep faults in the area are: 1. Kangbao-Yichang-Chifeng deep fault, 2. Chicheng-Longhua-Jianping deep fault, 3. Changping-Zunhua-Qianxi deep fault, 4. Taihang Shandong deep side Fault, 5. Shenyang - Tancheng - Lujiang deep fracture. Some of them have been identified as aeromagnetic anomaly bands and gravity gradient bands. They control the magmatic activity after the Archean (Sanggan) period