| 朝鲜中生代构造 |
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| 引用本文：金贞焕.1994.朝鲜中生代构造[J].地球学报,15(3,4):32-44. |
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| 摘要点击次数: 2073 |
| 全文下载次数: 1931 |
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| 中文摘要:朝鲜中生代构造作用以多旋回的克拉通内变形为特，其中包括：a)韧性或脆必剪切走滑作用；b)挤压期的褶皱、冲断和走滑压扭作用；c）引张期的正断层或多米诺断裂系统和张扭走滑作用形成的盆地。它们发生于3个构造事件期间：Sougnim、Daebo和Bulgugsa造山期。晚二叠世一早三叠世的 Songuim 造山可分为两个阶段。当Songnim造山作用减弱时，后构造花岗岩石发生侵位，在张性构造环境下形成 Daedong盆地。晚三叠世-早侏罗世 Daedong 群沉积之后，Daebo造山随之发生，形成NE走向的褶皱和逆断层。这次事件是 Songnim事件的继续，其褶皱走向和断层运动方均与 Songnim 期相类似。从晚白垩世到早第三纪时期，Bulgugsa造山产生E-W走向褶皱的影响。拉分盆地内沉积岩石遭受压扭作用的影响，产生雁列状褶皱组合和花状构造。朝鲜的中生代构造作用与中国的印支、燕山和喜马拉雅构造作用相互联系。 |
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| Mesozoic Tectonics in Korea |
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| Abstract:Mesozoic tectonism in Korea is characterized by polycyclic andreiterated intracratonic deformations,which include a )strike-slip movement of ductile or brittle-ductile shearings,b)compressive phase of folding,thrusting,and transpression of strike-slip movement and c）extensional phase of basin fromation by normal or domino fault system and ranstension of strike-slip movement.It occurred during three events:Songnim,Daebo and Bulgugsa orogenies.Late Permian to early Triassic Songnim oreogeny can be divided into two stages.When the Songnim orogeny was diminished,post-tectonic granites were emplaced and the Daedong basins were formed by extensional tectonic fields.The Daebo oregeny follows the deposition of the late Triassic to early Jurassic Daedong Group,which includes NE-trending folds and thrusts.This phase was continued on the Songnim phase,in which folds and thrust faults had the similar trends and transport drections.From the late Cretaceous to early Tertiary periods,the Bulgugsa orogeny produced E-W treding folds and thrusts.Thrust movements prevailed in the northeastern part of the Ogcheon Belt,whereas other areas were affected by E-W trending folds.Sedimentary rocks in the pull-apart basins were affected by transpression and produced en-echelon arrays of folds and flower structures.Mesozoic tectonism in Korea can be correlated to Indosinian,Yanshanian,and Himalayanian tectonisms in China. |
| keywords:Korean Peninsula Mesozoic Tectonics Polycyclic evolution |
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