柴达木盆地北缘反转构造特征及其控煤作用分析

发布时间：2018-04-09 09:32

本文选题：柴达木盆地北缘　切入点：反转构造　出处：《煤炭科学技术》2017年06期

【摘要】：基于构造与煤层赋存状态的关系,为进一步认识柴达木盆地北缘反转构造的控煤作用,依据反转构造识别原则,对柴达木盆地北缘各构造分区中典型煤矿区的地质剖面进行反转构造识别,并利用平衡剖面技术,探讨反转构造演化过程的控煤作用。结果表明:(1)研究柴达木盆地北缘普遍认识到该区在晚侏罗世-白垩纪发生过正反转构造,但是缺乏地质工作程度较高的煤矿区研究实例和控煤作用的分析;(2)通过对选取的地质控制程度较高的地质剖面进行反转构造识别,将各构造分区的构造反转时限进一步厘定晚侏罗世;(3)反转构造的控煤作用在反转前后均有有利条件,反转前为成煤作用提供可容空间,反转后使得发育较好煤系及煤层的上盘变浅。
[Abstract]:Based on the relationship between the structure and the occurrence state of coal seam, in order to further understand the controlling effect of inversion structure in the northern margin of Qaidam Basin, according to the principle of identification of inversion structure,The reverse structure identification of typical coal mining area in each tectonic subdivision of northern margin of Qaidam Basin is carried out, and the controlling effect of inversion structure evolution process is discussed by using balanced section technique.The results show that the northern margin of the Qaidam basin is generally recognized that the positive and reverse structures occurred in the late Jurassic-Cretaceous period.However, there is a lack of examples of coal mining areas with high degree of geological work and analysis of coal control. By means of reverse structural identification of selected geological sections with higher degree of geological control,The tectonic inversion time of each tectonic division is further determined. The tectonics of the inversion tectonics have favorable conditions before and after inversion, which provides room for coal formation before and after inversion.After inversion, the upper face of well-developed coal measures and coal seams become shallower.
【作者单位】：青海省地质调查局;吉林大学地球科学学院;青海油田公司勘探开发研究院;青海煤炭地质一0五勘探队;
【基金】：青海省地质勘查基金资助项目(2014057009ky009,2015020011ky008,2016020011ky011,2016020019ky019,2016020020ky020)
【分类号】：P618.11

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