华北燕山造山带结构要素组合

华北燕山造山带结构要素组合

邓晋福, 苏尚国, 赵国春, 刘翠

岩石圈构造、深部过程和探测技术教育部重点实验室，中国地质大学北京 100083

收稿日期:2004-09-20 修回日期:2004-09-20 出版日期:2004-09-20 发布日期:2004-09-20

Structural Elements Association of Yanshan Orogenic Belt,North China

DENG din-fu, SU Shang-guo, ZHAO Guo-chun, LIU Cui

Key Laboratory of Lithospheric Tectonics and Lithoprobe Techniques, Ministry of Education, China University of Geosciences, Beijing 100083, China

Received:2004-09-20 Revised:2004-09-20 Online:2004-09-20 Published:2004-09-20

摘要/Abstract

摘要： 采用造山带结构要素组合的概念，对华北燕山造山带进行了研究。燕山造山带各演化阶段的结构要素组合特征如下：前造山和初始造山幕(J1)，早侏罗世早期为前造山伸展构造，结构要素组合有：三又式裂谷带、板内型玄武岩、含煤建造；早侏罗世晚期为初始造山收缩构造，结构要素组合有：向北倾伏的褶曲与逆冲、九龙山组类磨拉石建造，硬绿泥石一十字石一蓝晶石为标志的低温、中一高压变质带。早期造山幕(J2)，中侏罗世早期为同造山伸展构造，结构要素组合有：岩石圈上隆伸展有关的火山盆地及可能的同期侵入岩，火山岩线型分布；中侏罗世晚期为收缩构造，有关的结构要素组合为：逆冲推覆和褶曲变形、磨拉石建造、同构造侵入体和角闪岩相变质岩。峰期造山幕(J3)，晚侏罗世早期同构造伸展构造，结构要素组合有：岩石圈上隆伸展有关的火山盆地与同期侵入岩，火山岩面型分布，火成岩组合中出现高压粗面岩类，较大量的流纹岩；晚侏罗世晚期收缩构造有关结构要素组合为：逆冲推覆和褶曲变形、磨拉石建造、同构造侵入体和角闪岩相变质岩，侵入岩中出现高压正长岩类。早白垩世早期(K1^1)晚造山幕有关的结构要素组合为：收缩变形分布较局限，湖相沉积建造替代磨拉石建造，侵入岩组合中出现过碱性石英正长岩，大晶洞构造的花岗岩及科马提质辉长岩等。早白垩世晚期(K1^2)后造山幕伸展有关的结构要素组合为：正断层、变质核杂岩、双峰式岩墙辟、典型的过碱性花岗岩和含煤建造。

Abstract: Using the concept of structural elements association of orogenic belt.we studied the evolution of Yanshan orogenic belt.The structural elements association characteristics of each stage of Yanshan orogenic belt are as follows:During the pre-and initial orogenic episode(J1),in the earlier stage of Early Jurassic,it is preorogenic extension.The structural elements associations are:triple junction rift, intraplate basalt,coal-bearing sedimentary formation;In the later stage of Early Jurassic.it is incipient orogenic compression.The structural elements associations are: northward verging fold and thrust, Jiulongshan molasse-like formation,chloritoid-staurolite-kyanite low temperature, middle-high pressure metamorphic belt.During the early orogenic episode(J2),in earlier stage of Middle Jurassic.it is syn-orogenic extension. Structural elements associations are: volcanic basins and intrusive rocks with lithosphere uplift and extension,linear distribution of volcanic rocks;In the later stage of Middle Jurassic, it is compression regime.Structural elements associations are:thrusting and folding,molasse formation.syn-tectonic intrusive rocks and am phibole facies metamorphiesm;During the peak orogenic episode(J3),in the earlier stage of Late Jurassic,it is syn-orogenic extension. Structural elements associations are:volcanic basins and intrusive rocks with lithosphere uplift and extension, planar distribution of vo1canic rocks,high-pressure trachyte,voluminous rhyolite;in the later stage of late Jurassic,it is compression structure, Structural elements associations are:thrusting and folding, molasse formation, syn-tectonic intrusive rocks and amphibole facies metamorphism,high-pressure syenite;During the earlier stage of Early Cretaceous,it is late-orogenic episode.Structural elements associations are:local compression structure,lake facies sedimentary formation,peralkaline quartz syenite,miarolitic granite,komatiitic gabbro;During the later stage of Early Cretaceous,it is post-orogenic extension episode. Structural elements associations are:normal faulting,metamorphic core complex,bimodal dikes,typical peralkaline granite and coal-bearing sedimentary formation.

邓晋福, 苏尚国, 赵国春, 刘翠. 华北燕山造山带结构要素组合[J]. J4.

DENG din-fu, SU Shang-guo, ZHAO Guo-chun, LIU Cui. Structural Elements Association of Yanshan Orogenic Belt,North China[J]. J4.