| 内蒙大青山早前寒武纪变质岩和早期陆壳的演化 |
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| 引用本文： | 金巍,李树勋,刘喜山.内蒙大青山早前寒武纪变质岩和早期陆壳的演化[J].吉林大学学报(地球科学版),1992(3). |
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| 作者姓名： | 金巍 李树勋 刘喜山 |
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| 作者单位： | 长春地质学院地质系
(金巍，李树勋)，长春地质学院地质系(刘喜山) |
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| 摘 要： | 将大青山地区早前寒武纪变质岩石分成三个岩性构造组合.即(1)麻粒岩—紫苏花岗岩组合;(2)角闪片麻岩—英云闪长岩组合;(3)富铝片麻岩—钾质花岗岩组合.其中,组合(1)是区内最古老的物质组成,其形成时代至少应在晚太古代以前(>2800Ma).组合(2)是具花岗—绿岩带特征的晚太古代中、低级变质岩系.组合(3)是经早元古造山变质作用形成的岩石组合.根据重新排定的地质事件顺序,对本区早期地壳演化的有关问题进行了讨论.
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| 关 键 词： | 内蒙大青山 岩性构造组合 地质事件 早期地壳演化 |
EARLY PRECAMBRIAN METAMORPHIC ROCKS AND EARLY EARTH CRUST EVOLUTION IN DAQINGSHAN, INNER MONGOLIA |
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| Jin Wei Li Shuxun Liu Xishan.EARLY PRECAMBRIAN METAMORPHIC ROCKS AND EARLY EARTH CRUST EVOLUTION IN DAQINGSHAN, INNER MONGOLIA[J].Journal of Jilin Unviersity:Earth Science Edition,1992(3). |
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| Authors: | Jin Wei Li Shuxun Liu Xishan |
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| Institution: | Department of Geology |
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| Abstract: | The early precambrian rocks in Daqingshan region can be divided into three lithological structural units, (1) granulite-charnockite unit; (2) hornblende gneiss-tonalite u-nite; (3) alumimum rich gneiss-kaligranite unit. Unit one is the oldest rocks in the region, which is at least older than late Archaean(>2800Ma). Unit two belongs to late Archaean middle-low grade metamorphic rocks with the characteristics of granite -greenstone belt. Unit three is the rock association formed in early proterozoic orogenic metamorphism. Accordiny to the rearranged geological event diagram, some questions about early crust evolution of this region have been discussed in this paper. |
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| Keywords: | Daqingshan Inner mongolia lithological structural unit geological event early crust evolution |
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