岩溶洞穴古河漫滩沉积物特征及其沉积环境演变——以山王洞中段为例
为揭示岩溶洞穴沉积物对沉积环境与沉积过程的指示作用,文章在分析双河洞洞系形成过程及山王洞区域地质调查资料的基础上,选取贵州山王洞中段古河漫滩沉积物为研究对象,采用粒度分析法与萨胡公式对洞穴沉积物粒度特征与沉积环境的相关性进行分析,推断不同沉积韵律期的沉积环境演变过程,研究结果表明:(1)古河漫滩表层沉积物以极细砂、粉砂和黏土为主,平均含量达94.42%,且中上部含有一层粗砂砾夹层;(2)沉积模式主要为跳跃和悬浮沉积,水动力条件整体稳定,搬运颗粒粒径平均值为637μm,其最大沉积物颗粒粒径为864.2μm;(3)以沉积物粒度特征为依据,将古河漫滩沉积过程划分为三级沉积韵律,一级沉积韵律厚度为40...
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Published in | 中国岩溶 Vol. 35; no. 4; pp. 394 - 401 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
贵州师范大学喀斯特研究院,贵州贵阳,550001%贵州省山地资源研究所,贵州贵阳550001
2016
贵州省喀斯特洞穴(旅游)资源开发利用工程技术研究中心,贵州贵阳550001%贵州省山地资源研究所,贵州贵阳,550001 |
Subjects | |
Online Access | Get full text |
ISSN | 1001-4810 |
DOI | 10.11932/karst20160406 |
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Summary: | 为揭示岩溶洞穴沉积物对沉积环境与沉积过程的指示作用,文章在分析双河洞洞系形成过程及山王洞区域地质调查资料的基础上,选取贵州山王洞中段古河漫滩沉积物为研究对象,采用粒度分析法与萨胡公式对洞穴沉积物粒度特征与沉积环境的相关性进行分析,推断不同沉积韵律期的沉积环境演变过程,研究结果表明:(1)古河漫滩表层沉积物以极细砂、粉砂和黏土为主,平均含量达94.42%,且中上部含有一层粗砂砾夹层;(2)沉积模式主要为跳跃和悬浮沉积,水动力条件整体稳定,搬运颗粒粒径平均值为637μm,其最大沉积物颗粒粒径为864.2μm;(3)以沉积物粒度特征为依据,将古河漫滩沉积过程划分为三级沉积韵律,一级沉积韵律厚度为404~275cm,二级沉积韵律厚度为285~165cm,三级沉积韵律厚度为165~0cm。上述研究为确定区域侵蚀基准面和地层升降运动过程提供有力证明,也为山王洞古气候环境研究提供了重要依据。 |
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Bibliography: | 45-1157/P sediment, sedimentary environment, karst, Shanwang cave, Shuanghe Cave system YANG Zhen-hua1 , LI Po2 , WU Ke-hua2 (1. Institute of South China Karst , Guizhou Normal University, Guiyang ,Guizhou 550001, China 2. Guizhou Institute of Mountain Resources ,Guiyang , Gui zhou 550001, China 3. Guizhou Engineering and Technology Research Center for Development & Utilization of Cave Resources, Guiyang, Guizhou, 550001 ,China) To reveal the influence of karst cave sediments on the sedimentary environment and the sedimenta- ry process, this study was conducted in the middle range of Shanwang cave, Guizhou, in conjuction with pre- vious studies of the cave development and associated geological information of the area. The sediment grain size analysis was done and on this basis Sahu's formula was employed to analyze the correlation of sedimenta- ry environment and the sediment particle gradation, from which the evolution of sedimentary environment in different cave sedimentary cycles was assessed. The results sho |
ISSN: | 1001-4810 |
DOI: | 10.11932/karst20160406 |