[1]刘东兴,陈 欣,陈留勤*,等.江西宁都翠微峰蜂窝状洞穴特征及成因[J].山地学报,2022,(2):196-204.[doi:10.16089/j.cnki.1008-2786.000665]
　LIU Dongxing,CHEN Xin,CHEN Liuqin*,et al.Genesis of Tafoni in the Cuiwei Peak, Jiangxi Province, China[J].Mountain Research,2022,(2):196-204.[doi:10.16089/j.cnki.1008-2786.000665]
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江西宁都翠微峰蜂窝状洞穴特征及成因
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2022年第2期
页码:
196-204
栏目:
山地环境
出版日期:
2022-03-25

文章信息/Info

Title:
Genesis of Tafoni in the Cuiwei Peak, Jiangxi Province, China
文章编号:
1008-2786-(2022)2-196-9
作者:
刘东兴; 陈 欣; 陈留勤*; 郭福生; 刘富军
东华理工大学 地球科学学院,南昌 330013
Author(s):
LIU Dongxing;  CHEN Xin;  CHEN Liuqin*;  GUO Fusheng;  LIU Fujun
School of Earth Sciences, East China University of Technology, Nanchang 330013, China
关键词:
丹霞地貌;  洞穴风化;  蜂窝状洞穴;  砾岩;  相对湿度;  江西翠微峰
Keywords:
danxia landscape;  cavernous weathering;  tafone;  conglomerate;  relative humidity;  the Cuiwei Peak;  Jiangxi
分类号:
P931
DOI:
10.16089/j.cnki.1008-2786.000665
文献标志码:
A
摘要:
在丹霞地貌区的陡坡上,常发育迷人的具有蜂巢结构的洞穴群,是重要的自然景观,同时也是很多历史文化得以依存的载体。洞穴风化地貌在全球不同类型岩石中广泛发育,其形成过程研究对理解岩石风化作用具有重要意义,但是由于研究程度差异,对其成因的认识存在分歧。江西省宁都县翠微峰国家森林公园位于中国南方湿润气候区,园区内丹霞陡坡上发育大型蜂窝状洞穴群。本文选择其中3个典型洞穴进行形态测量,利用水分测试仪和回弹仪分别进行原位相对湿度和岩石抗压强度测试,分析丹霞地貌区砾岩陡坡上蜂窝状洞穴的成因。结果表明:(1)研究区形成丹霞地貌的砾岩孔隙度和渗透性较好且含有易溶的钙质成分,为水和盐的运移提供了前提条件;(2)与洞穴边缘相比较,洞穴内壁更加潮湿、岩石回弹值较低,指示洞穴内部微气候有利于水和盐的聚集;(3)洞穴内壁盐结晶增加岩石颗粒间的膨胀力, 破坏了砾岩的完整性,造成洞穴内风化更快,导致洞穴不断加深变宽。本研究可以为进一步理解洞穴成因提供实际材料,同时可为园区洞穴景观管理和地学教育提供科学依据。
Abstract:
The fascinating cavities with honeycomb structure are well-developed on the steep slopes of danxia landscapes, which are important natural landscapes and areas for conservation of many valuable historical and cultural sites in China. Cavernous weathering features develop widely in different types of lithologies around the world, and the study of their formation processes is significant for the understanding of rock weathering mechanisms in geomorphology. Unfortunately, the formation processes and controlling factors of cavernous weathering forms remain controversial owing to the differences in the degree of research. The Cuiwei Peak National Forest Park, located within the subtropical humid region of South China, is featured by well development of large tafoni occurring on the steep slopes of danxia landscapes. In this study, three tafoni of the Cuiwei Peak park were selected for morphological observation and measurement. A moisture tester and a Schmidt hammer were also used for in-situ measurements of relative humidity and rock hardness in order to analyze the genesis of tafoni on the conglomerate cliffs in the danxia landscape areas. The research results show that:(1)The bedrock of danxia landscapes in the study area is dominantly composed of conglomerates, which are porous and permeable, and contain soluble calcium components, providing prerequisites for the migration of water and salt.(2)Compared with the rims of the tafoni, the backwalls were featured by higher relative humidity and lower rebound values, indicating that the microclimate inside the tafoni had been favorable for the accumulation of water and salt.(3)The crystallization of salt on the backwalls increased the expansion stress between the clasts and broke the integrity of the conglomerates, resulting in more rapid weathering rates of the interiors and the continuous deepening and widening of the tafoni. This study is significant because it not only provides practical materials for further understanding of formation processes of tafoni, but also supports management and geo-education of cavity landscapes in the park.

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备注/Memo

备注/Memo:
收稿日期(Received date):2020-09-30; 改回日期(Accepted data):2022-04-20
基金项目(Foundation item):国家自然科学基金(41772197); 江西省教育厅科技项目(GJJ170441)。[National Natural Science Foundation of China(41772197); Science and Technology Project of Jiangxi Provincial Department of Education(GJJ170441)]
作者简介(Biography):刘东兴(1995-),男,山西长治人,硕士研究生,主要研究方向:红层与丹霞地貌。[LIU Dongxing(1995-), male, born in Changzhi, Shanxi province, M.Sc. candidate, research on red beds and danxia landscape] E-mail: 1325248842@qq.com
*通讯作者(Corresponding author):陈留勤(1983-),男,甘肃陇南人,博士,副教授,主要研究方向:红层与丹霞地貌。[CHEN Liuqin(1983-), male, born in Longnan, Gansu province, Ph.D., associate professor, research on red beds and danxia landscape] E-mail: liuqincheen@163.com
更新日期/Last Update: 2022-03-30