| 华北地块北缘及邻区显生宙构造应力场 |
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| 引用本文： | 吴珍汉.华北地块北缘及邻区显生宙构造应力场[J].吉林大学学报(地球科学版),1996(4). |
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| 作者姓名： | 吴珍汉 |
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| 作者单位： | 地质力学研究所 |
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| 摘 要： | 华北地块北缘及邻区显生宙不同时期存在不同类型的造山作用，古生代以陆缘俯冲造山为主，中生代以陆内挤压造山为主，新生代以陆内伸展造山为主。不同造山阶段存在不同的区域构造应力场。晚古生代陆缘俯冲造山阶段，区域最大主压应力方向以近南北向为主。中生代陆内挤压造山阶段，南北向边界挤压力的作用不断减弱，而北西—北西西向边界挤压力的作用不断增强；在中东地段，印支期—早燕山期—晚燕山期，区域最大主压应力方向发生自南北向—北西向—北西西向规律性变化。新生代陆内伸展造山阶段，区域最大主压应力方向以北东向为主。不同造山阶段区域构造应力的量值也存在明显差别，构造应力大小与造山作用强度、构造—岩浆活动性存在良好正相关关系
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| 关 键 词： | 构造应力场 显生宙 造山作用 华北地块北缘 |
PHANEROZOIC TECTONIC STRESS FIELDS OF NORTH MARGINAL NORTH CHINA CRATON AND ITS ADJACENT AREA |
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| Wu Zhenhan.PHANEROZOIC TECTONIC STRESS FIELDS OF NORTH MARGINAL NORTH CHINA CRATON AND ITS ADJACENT AREA[J].Journal of Jilin Unviersity:Earth Science Edition,1996(4). |
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| Authors: | Wu Zhenhan |
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| Abstract: | Different types of orogenises existed in different periods in north marginal North China Craton and its adjacent area. Marginal continental subductional orogenises developed in the Palaeozoic era. Intra-continental compressional orogenises dominated in the Mesozoic era. Intra-continental extensional orogenises formed in the Cenozoic era. Different tectonic stress fields existed in different orogenic stages. Regional main maximum stress trended nearly south-north while regional main minimum stress trended nearly east-west in the late Palaeozoic marginal continental subductional orogenic stage. In the Mesozoic intra-continental compressional orogenic stage the south-north compressional boundary force decreased gradually while the northwestward and west northwestward boundary forces increased rapidly, resulting in the directional change of main maximum stress from south-north in Indosinian stage to northwest in early Yanshanian stage to west northwest in late Yanshanian stage and the directional change of main minimum stress from east-west in Indosinian stage to northeast in early Yanshanian stage to north northeast in late Yanshanian stage. The regional main maximum stress became northeast trending while the regional main minimum stress became northwest trending in Cenozoic intracontinental extensional orogenic stage. The values of regional tectonic stress also changed in different orogenic stages. The value of stress existed close correlation with orogenic strength and structural-magmatic activity. |
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| Keywords: | tectonic stress field Phanerozoic orogenises north marginal North China Craton |
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