青海省祁连山西北部煤田构造遥感解译
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摘要
西北祁连山地区自然地理条件恶劣、工作程度低。通过选取优质ETM影像数据进行融合、镶嵌、裁剪等预处理,在解译标志信息和复合处理后制作该区的影像图。影像图表明祁连山西北部构造复杂,特征明显,北西向大断裂发育,是控制区域构造和煤田构造格局的主要构造要素。依据线性构造走向玫瑰花图和密度等值线图可以发现,研究区呈现明显的分区性:西部分区线性构造展布以北东东、北东向为主,密度为全区最大;中区线性构造以北西向展布,与区域主要构造线方向一致,且密度最小;东部线性构造以北西西向为主,延伸较长且较为密集。
The physiographical condition in the northwestern Qilian Mts. area is abominable with low level of geological works. Through selected high quality ETM image data carried out pretreatment of merging, mosaic and tailoring etc., to make image-maps of the area after designated information interpretation and composite treatment. The image-maps have shown that structures in the northwestern Qilian Mts. area are complex with obvious characteristics. NW major faults are well developed, thus the main structural factor to control regional tectonics and coalfield tectonic framework. From lineament strike rose diagram and density isogram the obvious zoning in the study area can be found: lineament extension direction in western subarea is mainly NEE, NE with maximum density in the area; in middle subarea mainly NW, consistent with regional main tectonic line, regularly distributed with minimum density; in eastern subarea mainly NWW, longer extended and densely distributed.
The physiographical condition in the northwestern Qilian Mts. area is abominable with low level of geological works. Through selected high quality ETM image data carried out pretreatment of merging, mosaic and tailoring etc., to make image-maps of the area after designated information interpretation and composite treatment. The image-maps have shown that structures in the northwestern Qilian Mts. area are complex with obvious characteristics. NW major faults are well developed, thus the main structural factor to control regional tectonics and coalfield tectonic framework. From lineament strike rose diagram and density isogram the obvious zoning in the study area can be found: lineament extension direction in western subarea is mainly NEE, NE with maximum density in the area; in middle subarea mainly NW, consistent with regional main tectonic line, regularly distributed with minimum density; in eastern subarea mainly NWW, longer extended and densely distributed.
引文
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[5]王佟.中国西北赋煤区构造发育规律及构造控煤研究[D].中国矿业大学(北京),2012.
[6]方德庆.遥感地质学[M].北京:石油工业出版社,2013.
[7]韩文清.遥感地质进展及其应用[J].新疆工学院学报,1998,04:286-291.
[8]隋志龙,李德威,黄春霞.断裂构造的遥感研究方法综述[J].地理学与国土研究,2002,03:34-37+44.
[9]林亮,曹代勇,占文锋,等.柴达木盆地北缘煤田构造特征的遥感解译[J].中国煤炭地质,2008,01:7-9.