甘肃北山勒巴泉变质核杂岩
On metamorphic core complex of Lebaquan in Beishan area, Gansu
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摘要: 在多期伸展体制下形成的勒巴泉变质核杂岩构造,具有3层结构的特征,即结晶基底、中间韧性盖层、上部脆性盖层,其间分别被基底剥离断层和盖层剥离断层分割。本文重点论述了变质核杂岩的组成、空间展布、结构构造和典型的构造样式,并分析了变质核杂岩构造的形成时代和大地构造背景。Abstract: The metamorphic core complex of Lebaquan is formed at multiple stage extensional structure system, and is characterized by a three-layer texture: crystalline basement, middle shear cover-layer and upper brittle cover-layer.And the three layers are divided by basement denudational fault and cover-layer denudational fault.The paper mainly deals with material formation, texture and typical tectonic style, and analyses the formation age and tectoncs background.
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Keywords:
- Beishan, Gansu /
- metamorphic core complex /
- denudational fault /
- extensonal structure
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