青海南部积石山赋煤带成煤条件研究
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摘要
积石山赋煤带位于青海南部,属于煤炭资源短缺地区。通过对研究区侏罗系岩石组合、成煤期动力学背景、成煤模式和煤质特征对比分析,发现:研究区北部侏罗系为断陷盆地发育的一套曲流河成煤模式,南部侏罗系为岛弧背景下的火山活动,在火山间歇期形成了厚煤层。由于成煤模式的差异,导致研究区的成煤条件存在较大不同,研究区羊曲组煤层较薄,煤质较差,年宝组煤层较厚,煤质较好。
The Anyemaqen Mts. coal hosting belt is situated in southern Qinghai,an area with shortage of coal resources. Through comparative analysis on Jurassic rock association,coal-forming period geodynamic setting,coal-forming mode and coal quality features have shown that the Jurassic System in north part of study area has a set of meandering river coal-forming strata in developed fault basins; in southern part had been volcanic activities under island arc setting,during the period of inactivity formed thick coal seams. Since different coal-forming patterns have caused major different coal-forming conditions in study area,thus coal seams in the Yangqu Formation thinner and coal quality poorer; while in the Nianbao Formation coal seams thicker and quality better.
The Anyemaqen Mts. coal hosting belt is situated in southern Qinghai,an area with shortage of coal resources. Through comparative analysis on Jurassic rock association,coal-forming period geodynamic setting,coal-forming mode and coal quality features have shown that the Jurassic System in north part of study area has a set of meandering river coal-forming strata in developed fault basins; in southern part had been volcanic activities under island arc setting,during the period of inactivity formed thick coal seams. Since different coal-forming patterns have caused major different coal-forming conditions in study area,thus coal seams in the Yangqu Formation thinner and coal quality poorer; while in the Nianbao Formation coal seams thicker and quality better.
引文
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[5]吕录仕,毛耀保,吴军虎,等.青海大武煤田推覆构造遥感分析与含煤远景区预测[J].中国地质,2001,28(6):43-46.
[6]鞠崎.青海玛沁县大武煤田找煤方向[J].青海国土经略,2004,3:1-3.
[7]鞠崎.青海省玛沁县大武煤田构造及聚煤作用分析[J].中国煤炭地质(原中国煤田地质),2006,18(1):13-15.
[8]谭节庆,马志凯,高科飞,等.青藏高原北部煤系赋存的板块构造控制[J].煤炭学报,2016,41(2):286-293.
[9]乔军伟,李聪聪,范琪,等.青藏高原北部成煤地质背景及煤系矿产资源特征[J].煤炭学报,2016,41(2):294-302.
[10]张国伟,郭安林,姚安平.中国大陆构造中的西秦岭一松潘大陆构造结[J].地学前缘,2004,11(3):23-31.
[11]骆满生,张克信,王国灿,等.东昆仑造山带塔妥煤矿羊曲组时代新知[J].地层学杂志,2001,25(1):24-27.
[12]孙崇仁.1997.青海省岩石地层[M].武汉:中国地质大学出版社.
[13]朱云海,朱耀生,林启祥,等.东昆仑造山带海德乌拉一带早侏罗世火山岩特征及其构造意义[J].地球科学—中国地质大学学报,2003,28(6):653-659.