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    1∶2 500 000华北侵入岩地质图空间数据库

    Spatial Database of 1∶2 500 000 Geologic Map of the Intrusions in North China

    • 摘要: 1∶2 500 000华北侵入岩地质图空间数据库是以华北地区近年完成的1∶250 000、1∶50 000基础地质调查资料以及专题研究为依托,结合国内外最新文献成果编制而成。地质图以研究区侵入岩为主要研究对象,通过编图建库的手段表达华北地区侵入岩时空格架、物质组成以及空间分带。图幅采用MapGIS 6.7软件制作,侵入岩按“岩性+年代”进行表示,包含侵入岩面元单位1743个,地层单位1534个,同位素年龄数据404个,并对侵入岩面元及同位素年龄赋予了相应属性,总体数据量约218 MB。地质图重点突出了华北地区岩浆岩分带,详细梳理了不同岩浆岩带的空间分布、岩浆期次、岩石组合、地球化学特征及构造背景等信息,充分反映了近年来地质调查和科研工作新成果,能够为后续地质调查、科学研究以及生产工作提供基础地质图件及信息资料服务,对服务资源和经济社会建设具有一定参考意义。

       

      Abstract: The spatial database of 1∶2 500 000 geologic map of the intrusions in North China (also referred to as the Database) was established based on the data obtained from 1∶250 000– and 1∶50 000–scale basic geological surveys and special studies of North China conducted in recent years, as well as the latest literatures from China and abroad. Focusing on the intrusions in North China (also referred to as the study area), a geologic map was prepared and a database was built to express the spatial-temporal framework, material composition and spatial belt division of the intrusions in North China. The map was prepared with the MapGIS 6.7 software. The intrusions in the map were denoted by means of ‘lithology + era’. The map, with a data size of about 218 MB, covers 1743 graphic primitives of intrusions, 1534 stratigraphic units and 404 pieces of isotopic age data. Meanwhile, corresponding attributes were assigned to the graphic primitives of the intrusions and the isotopic ages. The geological map highlights the division of magmatic rock belts in North China, with the data of different magmatic rock belts being collated in detail including spatial distribution, magma stages, rock association, geochemical characteristics, genesis and tectonic background. This Database fully reflects the new achievements obtained from geological survey and scientific research in recent years. Therefore, it will provide basic geological maps and data for future geological surveys, scientific research and production. In the meantime, to a certain extent, it can be used as a reference for resource exploration and economic and social development.

       

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