| 前寒武纪早期朝鲜半岛地壳的形成与演化 |
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| 引用本文： | 梁道俊,刘永江.前寒武纪早期朝鲜半岛地壳的形成与演化[J].世界地质,2009,28(3):271-279. |
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| 作者姓名： | 梁道俊 刘永江 |
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| 作者单位： | 1. 金日成综合大学地质系, 平壤 朝鲜; 2. 吉林大学地球科学学院, 长春 130061 |
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| 摘 要： | 通过对朝鲜半岛前寒武纪结晶基底变质岩的岩石学、年代学和大地构造学分析, 提出太古宙-古元古代是古陆的形成阶段(Ar-Pt1 ) , 可分为3个阶段: 古陆核的形成阶段(Ar1 -Ar3 ) 、狼林微陆块的形成阶段(Ar4 ) 和古陆的形成阶段( Pt1 ) 。在朝鲜半岛发现的古老地壳岩石位于南浦-甑山和松原地区, 其中最老的岩石位于甑山地区, 年龄为3.4 ～3.6 Ga ( 3 503 ±123 Ma) , 相当于古太古代 (Ar2 ) ; 松原地区分布着稍年轻的岩石(219～311 Ga) , 相当于中太古代(Ar3 ) 。古陆核形成于朝鲜半岛北部的南浦-甑山和松原地区, 包括狼林地块和京畿地块的朝鲜半岛太古宙岩石大部分形成于新太古代, 中朝古陆的主体形成于太古宙末。古元古代末(约1 600或1 800 Ma) , 随着摩天岭海闭合, 狼林微陆块与冠帽微陆块通过碰撞聚合而形成一个整体, 称为摩天岭运动(可以对比中国的吕梁运动) 。摩天岭运动结束后, 朝鲜半岛作为中朝古陆的一部分, 整体进入相对稳定的地壳演化阶段。
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| 关 键 词： | 朝鲜半岛 狼林微陆块 摩天岭海 中朝古陆 |
Formation and evolution of Early Precambrian crust in Korean Peninsula-formation stages of palaeocontinent(Ar-Pt1) |
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| LIANG Dao-Jun-,LIU Yong-Jiang-.Formation and evolution of Early Precambrian crust in Korean Peninsula-formation stages of palaeocontinent(Ar-Pt1)[J].World Geology,2009,28(3):271-279. |
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| Authors: | LIANG Dao-Jun- LIU Yong-Jiang- |
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| Institution: | 1. Department of Geology, Kim Il Sung University, Pyongyang, Korea; 2. College of Earth Sciences, Jilin University, Changchun 130061, China |
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| Abstract: | Through the analysis of petrology, chronology and geotectonics of Precambrian crystalline basement metamorphic rocks in Korean Peninsula, it is considered that Archean and Paleoproterozoic are the formation stages of palaeocontinent (Ar-Pt1 ) , which can be divided into three stages: formation stage of palaeocontinental core (Ar1-Ar3 ) , formation stage of Rangrim microcontinent (Ar4 ) and formation stage of palaeocontinent ( Pt1 ). The ancent crustal rocks of Korean Peninsula were located in Nampo-Zungsan and Songwon regions, the oldest known rock distributes Zungsan region with the age 314 ～316 Ga ( 3 503 ±123 Ma) , corresponding to Palaeoarchean (Ar2 ) , while the slightly younger rock (219～311 Ga) distributes Songwon region, corresponding to Middle Ar2 chean (Ar3 ). Palaeocontinental core was formed in Nampo-Zungsan and Songwon regions of northern Korean Peninsula. The Archean rocks of Korean Peninsula, including Rangrim and Gyonggi massifs, almost formed in Neoarchean, and the main part of China-Korea paleocontinentwas formed at the end of Archean. At the end of Palaeo-proterozoic ( ca. 1 600Ma or 1 800Ma) , along with the Machonlyong Sea closed, the Rangrim and Gwanmo microcontinents became a whole massif through collision, which called Machonlyong motion ( corresponding to Luliang motion in China). After Machonlyong motion, the Korea Peninsula as one part of China-Korea paleocontinent entered into relatively stable evolution stage. |
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| Keywords: | Korean Peninsula Rangrim microcontinent Machonlyong Sea China-Korea paleocontinent |
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