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地质力学学报:2007,13(2):150-162
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晋东北地区燕山运动的基本特征——来自1:25万应县幅区域地质调查的总结
(山西省地质调查院, 山西 榆次 030600)
BASIC CHARACTERISTICS OF THE YANSHAN MOVEMENT IN NORTHEASTERN SHANXI-A SUMMARY OF REGIONAL SURVEY OF THE 1: 250000 YINGXIAN COUNTY SHEET
(Shanxi Institute of Geological Survey, Yuci 030600, Shanxi, China)
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投稿时间:2006-12-11    
中文摘要: 晋东北地区燕山期地壳活动剧烈而频繁,经历了3次由伸展→挤压转换→隆升和岩浆活动过程。燕山运动早期形成早侏罗世断陷盆地和中侏罗世挤压坳陷型聚煤构造盆地;中期中晚侏罗世形成被NW、NE向深大断裂围限的火山断陷盆地,中基性-酸性火山喷发和浅成、超浅成中酸性岩浆侵入,晚侏罗世末形成了一系列NNE向褶皱和逆冲推覆构造带;晚期早白垩世再次形成断陷盆地和开阔平缓褶皱,义县组不整合在火山岩之上,晚白垩世处于挤压造山后的山体隆升阶段,左云组不整合在义县组之上,伴随有壳源型花岗岩侵入,NW、NE向断裂复活,形成地堑、地垒式断裂组合,导致山体隆升。
Abstract:The Yanshanian crustal activity in northeastern Shanxi was intense and frequent and underwent a process of extension →transpression →uplift and magmatism.The early stage of the Yanshan movement generated an Early Jurassic downfaulted basin and a Middle Jurassic compressional-downwarped coal-accumulating basin.In the middle stage, the Mid-Late Jurassic witnessed the formation of a volcanic downfaulted basin bounded by NW and NE deep faults, intermediate-basic and acid volcanic eruption and hypabyssal and near-surface intermediate-acid magmatic intrusion, and the terminal Late Jurassic witnessed the formation of a number of NNE-trending folds and overthrust zones.In the late stage, in the Early Cretaceous a downfaulted basin and open gentle folds once again formed and the Yixian Formation unconformably rested on volcanic rocks;the Late Cretaceous was a stage of mountain uplift after compressional orogeny, when the Yixian Formation was unconformably overlain by the Zuoyun Formation, accompanied by intrusion of crust-derived granite, and NE-and NE-trending faults were revived, forming a graben-and horst-type fault combination and resulting in mountain uplift.
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基金项目:1:25万应县幅区域地质调查(编号:20011300004061)和1:25万忻州市幅区域地质调查(编号:20011300004051)部分成果。
引用文本:
赵祯祥,杜晋锋,2007.晋东北地区燕山运动的基本特征——来自1:25万应县幅区域地质调查的总结[J].地质力学学报,13(2):150-162.DOI:
ZHAO Zhen-xiang,DU Jin-feng,2007.BASIC CHARACTERISTICS OF THE YANSHAN MOVEMENT IN NORTHEASTERN SHANXI-A SUMMARY OF REGIONAL SURVEY OF THE 1: 250000 YINGXIAN COUNTY SHEET[J].Journal of Geomechanics,13(2):150-162.DOI:

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