地震研究

借助数字高程模型(简称DEM)的地形分析技术,得出了能够突出沟谷信息的长白山天池火山锥形立体地形图。利用坡度分析、高程剖面分析、三维透视等DEM技术方法,对更新世以来的长白山天池火山喷发物空间分布范围进行了地形地貌分析,并与前人已有的野外地质调查结果进行对比,总结出了研究区内喷发物的地形地貌特征,据此推测了前人未涉及地区的喷发物的空间分布范围。这为开展长白山天池火山的大比例尺火山地质填图,特别是对于某些全新世火山喷发物范围和界限的厘定提供了遥感学依据。

In this paper,using DEM terrain analysis technology,we acquired a three-dimensional topographic map,which can give prominence to the valley information.By the DEM technology,such as slope analysis,elevation profiles analysis,three-dimensional perspective,we analyzed the landform of the spatial distribution of the eruptive products that were from the eruption of Tianchi volcano in Changbai Mountains sssince Pleistocene.The results were compared with that of the Predecessors' filed geological survey.The topography features of eruptive products in the study area were summarized,by which the spatial distribution of the eruptive products that was uninvolved by predecessors was speculated.These results can provide a remote sensing basis for making the large-scale volcanic geological maps of the Tianchi volcano,in Changbai Mountains,and especially for determining the scope and limits of some Holocene volcanic eruptive products.

引言
1 研究区火山地质概况
2 DEM数据的可视化
3 长白山天池火山喷发物DEM形貌特征研究
4 结论与讨论

图1 长白山天池火山地质简图<br/>Fig.1 Geological sketch map of Tianchi Volcano, Changbai Mountains

图1 长白山天池火山地质简图
Fig.1 Geological sketch map of Tianchi Volcano, Changbai Mountains

图2 DEM可视化步骤流程<br/>Fig.2 Flow chart of DEM visualization

图2 DEM可视化步骤流程
Fig.2 Flow chart of DEM visualization

图3 长白山天池火山锥体立体地形图<br/>Fig.3 Three-dimensional topographic map of Tianchi volcanic cone, Changbai Mountains

图3 长白山天池火山锥体立体地形图
Fig.3 Three-dimensional topographic map of Tianchi volcanic cone, Changbai Mountains

图4 天池火山四期造锥阶段喷发物空间分布范围<br/>Fig.4 The spatial distribution map of eruptive materials in Tianchi cone

图4 天池火山四期造锥阶段喷发物空间分布范围
Fig.4 The spatial distribution map of eruptive materials in Tianchi cone

图5 天池火山造锥阶段白头山期第二(a)、第三(b)和第四(c)喷发阶段喷发物高度分布图<br/>Fig.5 Height distribution map of different period eruptive materials made the Tianchi cone

图5 天池火山造锥阶段白头山期第二(a)、第三(b)和第四(c)喷发阶段喷发物高度分布图
Fig.5 Height distribution map of different period eruptive materials made the Tianchi cone

图6 中国境内天池火山锥体高程剖面分析图<br/>Fig.6 Analysis chart of height section of Tianchi volcano cone within Chinese territory

图6 中国境内天池火山锥体高程剖面分析图
Fig.6 Analysis chart of height section of Tianchi volcano cone within Chinese territory

图7 朝鲜境内天池火山锥体高程剖面分析图<br/>Fig.7 Analysis chart of height section of Tianchi volcano cone within D.P.R Korean territory

图7 朝鲜境内天池火山锥体高程剖面分析图
Fig.7 Analysis chart of height section of Tianchi volcano cone within D.P.R Korean territory

图8 天池火山全新世不同喷发物空间分布范围<br/>Fig.8 Spatial distribution scope chart of Holocene different eruptive material by Tianchi volcano

图8 天池火山全新世不同喷发物空间分布范围
Fig.8 Spatial distribution scope chart of Holocene different eruptive material by Tianchi volcano

图9 长白山天池火山三维透视图<br/>Fig.9 Three-dimensional perspective of Tianchi volcano, Changbai Mountains

图9 长白山天池火山三维透视图
Fig.9 Three-dimensional perspective of Tianchi volcano, Changbai Mountains

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备注

引言

1 研究区火山地质概况

2 DEM数据的可视化

3 长白山天池火山喷发物DEM形貌特征研究

4 结论与讨论

期刊信息