大巴山国家地质公园岩溶景观空间分层结构及受新构造运动的影响

发布时间：2018-06-22 02:35

本文选题：大巴山国家公园 + 岩溶景观类型　；参考：《中国岩溶》2017年03期

【摘要】：大巴山国家地质公园岩溶景观种类齐全、组成系统完整,其发育和分布受构造控制作用显著。文章探讨大巴山国家地质公园岩溶景观特征及其空间分层结构受构造控制的作用机制,发现岩溶空间形态总体呈现掀斜式强烈抬升、河流深切的亚热带中低山峡谷岩溶特点,新构造运动间歇性隆升对岩溶景观垂向发育影响较为显著。岩溶发育的空间层位划分为三个高程层级,从下至上连续分段为440~700 m,700~1 200 m,1 200~1 890m。空间分层结构反映某一阶段地壳总体处于相对稳定的时期,发育水平岩溶系统(溶洞),后期地壳发生快速抬升,出现少量竖向岩溶系统(落水洞),溶洞的分布与相应的侵蚀基准面(现代河床、各级阶地)相适应。根据发育层级推测,研究区至少经历过四次规模较大的间歇性快速抬升构造活动,各级夷平面先后受喜马拉雅运动第Ⅱ幕和第Ⅲ幕影响。喜马拉雅运动多次间歇性快速抬升过程中,丰沛的地下水和地表水下切并快速溶蚀形成多层剥蚀台地。在新构造运动相对稳定期,有充分的条件循环交替溶蚀导致垂向、水平岩溶均出现较大规模发育。
[Abstract]:The karst landscape of Daba Mountain National Geopark is of complete variety and complete system, and its development and distribution are controlled by structure. This paper probes into the karst landscape characteristics of Daba Mountain National Geopark and the action mechanism of its spatial stratification structure controlled by structure. It is found that the karst spatial form generally presents a strong uplift of tilting type and the karst characteristics of deep subtropical low- and medium-mountain canyons of rivers. The intermittent uplift of neotectonic movement has a significant effect on the vertical development of karst landscape. The spatial horizon of karst development can be divided into three levels, and from the bottom to the top, the spatial horizon is divided into four parts: 440 ~ 700m ~ 700 m ~ (-1) ~ (200) ~ 1 890 m ~ (-1). The spatial stratification structure reflects that the crust is in a relatively stable period in a certain period, the horizontal karst system (karst cave) is developed, and the late crustal uplift occurs rapidly. There are a few vertical karst systems (falling holes), and the distribution of karst caves is suitable to the corresponding erosion datum (modern river bed, various terraces). According to the developmental hierarchy, the study area has experienced at least four large-scale intermittent rapid uplift tectonic activities, and each planation surface is influenced by the Himalayan movement acts II and III respectively. During the rapid and intermittent uplift of Himalayan movement, abundant groundwater and surface water were cut and rapidly dissolved to form multilayer denudation platform. During the relatively stable period of neotectonic movement there are sufficient conditions for alternate dissolution to cause vertical and horizontal karst to develop on a large scale.
【作者单位】：成都理工大学管理科学学院;成都理工大学数学地质四川省重点实验室;成都理工大学地球物理学院;中国科学院地理科学与资源研究所/资源与环境信息系统国家重点实验室;西南交通大学峨眉校区;四川建筑职业技术学院;成都理工大学旅游与城乡规划学院;
【基金】：中国地质调查局地质矿产调查评价基础研究计划项目“华南杨子古大陆演化及其资源效应”之“大巴山前缘及邻区构造与岩溶景观形成与分布研究”工作项目(1212011220902) 四川省教育厅人文社会科学重点研究基地四川景观与游憩研究中心重点项目“万源八台山地质公园游憩区承载力评价研究”(JGYQ2016015)
【分类号】：P642.25

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