| 珲春地区早印支期I—A型花岗岩系的特征及其大地构造意义 |
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| 引用本文： | 赵成弼,靳克,齐成栋,彭玉鲸.珲春地区早印支期I—A型花岗岩系的特征及其大地构造意义[J].吉林地质,2001,20(1):1-11. |
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| 作者姓名： | 赵成弼 靳克 齐成栋 彭玉鲸 |
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| 作者单位： | 吉林省区域地质矿产调查所,吉林,长春,130022 |
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| 摘 要： | 珲春市地域内花岗岩出露面积约达3000km^2，占地域总面积一半以上，前人均认为以大荒沟花岗闪长岩大岩基为代表折花岗岩类主要为华力西晚期的产物，并成为晚华力西期地槽（褶皱带）存在的重要理论依据之一，八十年代以来，新的地质调查逐步对大荒沟大岩体进行了岩石谱系单位划分，确认存在着闪长岩-花岗闪长岩-二长花岗岩-钾长花岗岩-晶洞（文象）钾长花岗岩呈套叠式产出的岩石序列，时代为早印支期，成因类型为I-A型花岗岩系，形成于早印支造山运动的过程之中，反映了整个陆缘造山旋回的成岩浆作用的特点，标志兴凯地块西部陆缘活动带过渡型陆壳经历了早印支期的构造岩浆作用。转化为成熟陆壳的过程。
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| 关 键 词： | 珲春地区 早印支期 I－A型花岗岩 大地构造 成因 岩浆作用 |
| 文章编号： | 1001-2427(2001)01-0001-11 |
Characteristics of the early Indo-Chinese I-A type granite series in the Hunchun area,Jilin province and its geotectonic significance |
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| ZHAO Cheng?bi,JIN Ke,QI Cheng?dong,PENG Yu?jing.Characteristics of the early Indo-Chinese I-A type granite series in the Hunchun area,Jilin province and its geotectonic significance[J].Jilin Geology,2001,20(1):1-11. |
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| Authors: | ZHAO Cheng?bi JIN Ke QI Cheng?dong PENG Yu?jing |
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| Abstract: | the outcropped area of granite in the Hunchun area, Jilin province is about 3 000km 2 which occupies more than half of the total area. The former geologists considered that the granites of the Dahuanggou granodiorite batholith is mainly a product of the late Variscan, becoming one of the important theoretical basis of the existence of the late Variscan geosyncline (folded belt). Since the eighties, lineage-zone of the Dahuanggou rock body has been made progressively, and the existence of diorite, granodiorite, adamellite, moyite as well as vuggy (graphic) moyite, which showed telescoped rock series; the age belongs to the early Indo-Chinese epoch. Its genetic type exhibits I-A type granite series, and was formed in the early Indo-Chinese epoch orogenic movement, indicated the plutonic magmatism of the whole epicontinental orogenic cycle. It is showed that intermediate continental crust in the western epicontinental mobile belt of the Xingkai block underwent the early Indo-Chinese tectonomagmatism and changed into a process of mature crust. |
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| Keywords: | Hunchun area early Indo-Chinese I-A type granite |
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