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本文主要从窑街煤田侏罗系的沉积环境和古构造分析入手,研究其沉积、构造的演化历史,从而探讨煤系、煤层的形成条件及控制因素,为该区的外围找煤工作提供地质依据。窑街煤田中侏罗世窑街组为主要含煤地层。以往著作多认为该煤田是山间谷地的典型代表,盆地由冲积环境演变为湖泊环境。本文根据沉积学、岩石学、重矿物,古流向等多种测试资料,确认该盆地是由基底断裂活动而形成的断坳型盆地。沉积环境是由湖泊浊流开始,径湖滨沼泽,深水湖泊向三角州,河流环境演变的。泥炭化作用直接与湖泊的演化有关。在泥炭层和煤系的发育过程中,缓慢而长期发育的 NNW 向和 NE 向两组同(沉积)期断裂构造起着明显地控制作用。
Based on the sedimentary environment and palaeo-teratology of the Jurassic coalfield in Yaogjie coalfield, this paper studies the evolution history of sediments and tectonics, and discusses the formation conditions and controlling factors of coal measures and coal seams. in accordance with. Yaojie coalfield Jurassic Yaojie group as the main coal-bearing strata. Most of the past works consider the coal field as a typical representative of the mountain valleys, and the basin evolved from an alluvial environment into a lake environment. Based on various test data such as sedimentology, petrology, heavy minerals, paleocurrent and so on, this paper confirms that the basin is a fault-depression basin formed by basement fault activity. Sedimentary environment is started by the turbidity of lakes, lakeshore swamps, deep lakes to the delta, river environment evolution. Peatlation is directly related to the evolution of lakes. During the development of peat and coal series, the slow and long-term NNW and NE trending faults have distinctly controlled the formation of two same (sedimentary) phases.