鲁西南地区构造演化与煤变质规律
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摘要
从鲁西南基底组成为出发点,依循华北板块构造演化历史的时间脉络,分析了研究区煤变质规律的形成是基底构造与成煤后构造运动双重作用的结果,基底构造决定煤变质的赋存格局,中新生带构造演化是基底构造框架控制下煤形成及深成变质、区域岩浆接触变质、动力变质等多因素共同作用的累积。鲁西南煤变质呈现了从鲁西古陆核向南、西边界断裂不断增高的趋势,即从气煤—气肥煤—肥煤—焦煤的变质规律。
Start from basement structure composition in the southwestern Shandong,in line with time context of North China plate tectonic evolution history,considered that the formation of coal metamorphism pattern in the study area is the result of dual function of basement structures and tectonic movement action after coal-forming. The basement structures have determined coal metamorphism and hosting pattern. Mesozoic and Cenozoic tectonic evolution is the accumulation of coal-forming under basement structural frame control and hypozonal metamorphism,regional magmatic contact metamorphism and dynamic metamorphism multi-factor joint action.Coal metamorphism in southwestern Shandong has a pattern of increasing from continental nuclear dome toward boundary fractures,or from gas coal to gas-fat coal,fat coal and coking coal.
Start from basement structure composition in the southwestern Shandong,in line with time context of North China plate tectonic evolution history,considered that the formation of coal metamorphism pattern in the study area is the result of dual function of basement structures and tectonic movement action after coal-forming. The basement structures have determined coal metamorphism and hosting pattern. Mesozoic and Cenozoic tectonic evolution is the accumulation of coal-forming under basement structural frame control and hypozonal metamorphism,regional magmatic contact metamorphism and dynamic metamorphism multi-factor joint action.Coal metamorphism in southwestern Shandong has a pattern of increasing from continental nuclear dome toward boundary fractures,or from gas coal to gas-fat coal,fat coal and coking coal.
引文
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