中国石笋微层在古气候重建中的应用研究  

Application of stalagmite laminae in paleoclimate reconstructions of China

作　　者：吴尧 李廷勇 陈朝军[1,2] 黄冉 王涛[1,2] 肖思雅 邱海英 徐玉珍[1,2] 黄洋阳 李俊云 Wu Yao;Li Tingyong;Chen Chaojun;Huang Ran;Wang Tao;Xiao Siya;Qiu Haiying;Xu Yuzhen;Huang Yangyang;Li Junyun(Chongqing Key Laboratory of Karst Environment,School of Geographical Sciences,Southwest University,Chongqing 400715;State Cultivation Base of Eco-agriculture for Southwest Mountainous Land,Southwest University,Chongqing 400715;College of Tourism and Geography,Yunnan Normal University,Kunming 650050,Yunnan)

机构地区：[1]西南大学地理科学学院岩溶环境重庆市重点实验室,重庆400715 [2]西南大学西南山地生态循环农业国家级培育基地,重庆400715 [3]云南师范大学旅游与地理科学学院,云南昆明650050

出　　处：《第四纪研究》2020年第4期1008-1024,共17页Quaternary Sciences

基　　金：国家自然科学基金项目(批准号:41772170和42011530078);西南大学西南山地生态循环农业国家级培育基地项目(批准号:5330200076);中央高校基本科研业务费专项项目(批准号:XDJK2020D005)共同资助。

摘　　要：石笋微层作为一种常见的岩溶沉积形态,响应于气候和环境的变化.因其具有超高分辨率和精确计年等特点,已经被广泛应用于古气候和古环境重建.本研究根据中国已经发表的石笋微层研究,基于石笋微层形成机制以及石笋微层类型划分,对石笋微层的计数和年代方法,以及目前已经使用的石笋微层中各种代用指标对气候环境的响应机制进行了总结,并在此基础上对石笋微层年代学和气候学研究中出现的问题进行了讨论.在构建石笋微层高分辨率年表时,辨别和排除特殊微层(伪年层、超年层、缺层等)所带来的误差,以及根据不同的洞穴环境探讨微层中各种物理和地球化学指标在年际-季节尺度上的气候与环境意义,并对其进行定量重建,是当前微层年代学和气候学需要面对的主要问题.石笋微层在重建气候突变事件内部结构以及古气候定量重建方面潜力巨大,在今后的研究中首先应结合现代洞穴监测,讨论石笋微层的形成机制和沉积旋回特征,准确判断伪年层或缺层所导致的年代误差.其次,要利用多指标综合对比,对洞穴系统中气候与环境信号的传递过程进行定量研究,加强新技术和新方法的应用,提高石笋微层年代模型和古气候代用指标解译的准确性.The stalagmite laminae,as a common karst sedimentary formations,responds to the changes of climate and environment.Because of its characteristics such as ultra-high resolution and accurate dating,it has been widely used in paleoclimate and paleoenvironment reconstruction.This study is on the basis of stalagmite laminae studies that have been published in China,based on the formation mechanism of stalagmite laminae and the classification of stalagmite laminae types,the methods of counting and dating stalagmite laminae,and the response mechanism of various proxy in stalagmite laminae to the climate and environment are summarized,and on this basis,the problems in the researches of stalagmite laminae chronology and climatology are discussed.At present,the following problems need to be faced in the study of stalagmite laminae chronology and climatology.In the construction of the high-resolution chronology of stalagmite laminae,it is necessary to distinguish and exclude the errors caused by special layers(false layers,super annual layers,missing annual layers,etc.),and quantitative reconstruction of the climatic and environmental significance of various physical and geochemical proxies on the interannual-seasonal scales based on different cave environments.The stalagmite laminae have great potential in realizing the internal structure of abrupt climate events and the quantitative reconstruction of paleoclimate.In the future research,the formation mechanism and sedimentary cycle characteristics of stalagmite laminae should be discussed in combination with modern cave monitoring,so as to accurately evaluate the age error caused by false and missing annual layers.Secondly,using multi-proxy comprehensive comparison,quantitatively study the transmission process of climate and environmental signals in the cave system,and the application of new technologies and methods is strengthened to improve the accuracy of interpretation of stalagmite laminae chronology and paleoclimate proxies.

关 键 词：中国石笋微层 年代学 古气候指标 古气候重建 

分 类 号：P532[天文地球—古生物学与地层学]