海洋地质与第四纪地质2024，Vol.44Issue(2)：81-96,16.DOI:10.16562/j.cnki.0256-1492.2024011701
滇西南沧源岩溶洞穴硝洞堆积物来源分析
Sources of karst cave deposits in Xiaodong Cave in Cangyuan,Southwest Yunnan
摘要
Abstract
Karst caves are valuable locations for studying prehistoric human activities during the Quaternary Period.Analyzing the depositional characteristics and provenance of clastic deposits in karst caves is crucial for understanding the evolutionary history of the depositional environment and shedding light on past human behaviors.Xiaodong Cave in Cangyuan,Southwest Yunnan was studied to unveil the source of clastic sediments.The grain size and mineralogical features of various clay minerals within and around the cave were analyzed.Results show that the cave sediments came mainly from the sediments in higher places outside the cave through sheet flow as shown in grain size characteristics.In addition,a small amount of insoluble material from limestone and materials formed after further weathering and pedogenesis were also accumulated.Overall,there might be four periods of further weathering and pedogenesis.Moreover,there were limestone breccias and rock debris fallen off from cave walls,from which four events of accumulation of limestone breccia or debris were recognized.The latest accumulation was obviously affected by human activities,to which sufficient attention should be paid in research works.关键词
岩溶洞穴堆积/堆积物来源/粒度/黏土矿物Key words
karst cave deposits/source tracking/grain size/clay minerals分类
天文与地球科学引用本文复制引用
石林,杨青,刘连文,张晋,郑妍,张俞,杨万书,邹梓宁,郑洪波..滇西南沧源岩溶洞穴硝洞堆积物来源分析[J].海洋地质与第四纪地质,2024,44(2):81-96,16.基金项目
国家自然科学基金项目"青藏高原东南缘晚更新世以来地球关键带演化过程"(42361144879),"青藏高原及周缘新生代大陆风化沉积记录研究"(41991323) （42361144879）
青藏高原第二次综合科学考察研究任务七"高原生长与演化"专题四"碰撞以来古地理格局与构造地貌过程"(2019QZKK0704) （2019QZKK0704）
云南省科技领军人才项目"建设云南省地球系统科学重点实验室"(202005AB160008) （202005AB160008）
云南省基础研究计划项目重点项目"滇西南晚更新世和平文化人类植物利用及环境适应性"(202301BF070001-005) （202301BF070001-005）
兴滇英才支持计划"滇西史前人类植物资源利用及其环境适应性"、Queensland-Chinese Academy of Sciences Collaborative Science Fund"Past Asian-Australian Monsoon Variability"(QCAS036,045GJHZ2023001MI) （QCAS036,045GJHZ2023001MI）
