| 长白山地区火山碎屑粒度特征研究 |
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| 引用本文： | 赵波,许建东,于红梅.长白山地区火山碎屑粒度特征研究[J].地震地质,2010,32(2):233. |
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| 作者姓名： | 赵波 许建东 于红梅 |
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| 作者单位： | 中国地震局地质研究所,北京,100029 |
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| 基金项目： | 国家自然科学基金，中国地震局地震行业科研专项 |
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| 摘 要： | 长白山地区全新世火山活动活跃,发育了良好的火山空降、火山碎屑流、火山涌流和火山泥石流堆积物。这些堆积物交错堆积,野外区分较为困难。在火山碎屑地层剖面调查基础上,系统采集了各种类型的火山碎屑堆积物样品。在实验室通过粒度参数和概率累积曲线分析,对堆积物成因类型进行了判别,讨论了火山空降堆积物和火山碎屑流堆积物随着与火口距离变化的规律。首次对研究区内粒度范围为62.5～0.02μm的细火山灰进行了粒度分析,对火山碎屑流和火山碎屑涌流中细火山灰端元分布特征和地质意义进行了分析和讨论
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| 关 键 词： | 火山碎屑 细火山灰 粒度分析 概率累积曲线 长白山地区 |
GRAIN-SIZE CHARACTERISTICS OF PYROCLASTS IN CHANGBAISHAN MOUNTAIN AREA |
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| ZHAO Bo,XU Jian-dong,YU Hong-mei.GRAIN-SIZE CHARACTERISTICS OF PYROCLASTS IN CHANGBAISHAN MOUNTAIN AREA[J].Seismology and Geology,2010,32(2):233. |
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| Authors: | ZHAO Bo XU Jian-dong YU Hong-mei |
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| Institution: | ZHAO Bo XU Jian-dong YU Hong-mei(Institute of Geology,China Earthquake Administration,Beijing 100029,China) |
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| Abstract: | The pyroclastic deposits from tephra fall,pyroclastic-flow,base-surge,and lahar are well developed in Changbaishan Mountain area where volcanic activity is active in the Holocene.These different pyroclastic deposits are difficult to distinguish from each other in the field because of their similar physical and geological appearance.Through field investigation of pyroclastic deposit sections in the study area,we systematically collected different pyroclastic deposit samples at different sites,and then calcul... |
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| Keywords: | pyroclastic deposit fine ash grain-size analyses cumulative curve Changbaishan area |
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