贡嘎山玉龙西高寒钙华地貌对冰川活动的记录  

Records of glacier activities by the alpine travertine landform in the Yulongxi area along Gongga mountain

作　　者：柴沛然 赵学钦[1] 王富东[1] 蒋耀曦 张强[2] 朱和艳 CHAI Peiran;ZHAO Xueqin;WANG Fudong;JIANG Yaoxi;ZHANG Qiang;ZHU Heyan(School of Environment and Resources,Southwest University of Science and Technology,Mianyang,Sichuan 621010,China;Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics,MNR&GZAR/International Research Center on Karst under the Auspices of UNESCO,Guilin,Guangxi 541004,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心,广西桂林541004

出　　处：《中国岩溶》2024年第3期552-562,584,共12页Carsologica Sinica

基　　金：国家自然科学基金项目(41672206);国家自然科学基金联合基金项目(U21A2016);广西岩溶动力学重点实验室开放课题基金(KDL&Guangxi202302)。

摘　　要：文章选取贡嘎山西侧玉龙西断裂带附近的钙华及周边冰碛物为研究对象,在野外调查的基础上,通过卫星高光谱遥感数据进行钙华识别,对钙华进行航空摄影测量,并构建主要钙华体精细化DEM及三维模型,分析钙华分布规律及地貌特征。结果表明:研究区钙华集中分布于玉龙西区域南北向断裂带两侧,沟谷由高向低处延伸,部分残留钙华体长宽比及表面擦痕等形态特征符合鲸背石、羊背石的外观特点。根据XRD半定量测试结果,结合地形特征,推测覆盖于钙华体之上的堆积物可能是冰川活动的产物,冰川活动时期,上部杂谷脑组风化剥蚀的物质随着冰川作用搬运至钙华体之上,活跃的冰川活动导致早期钙华遭受强烈的冰川侵蚀作用,形成冰川侵蚀地貌。As a carrier of geological historical records and climatic information,travertine has played a crucial role in the study of global climate change,and scholars have made significant progress in research on travertine over the past few decades.Travertine deposits are widely distributed on the Qinghai-Tibet Plateau,often referred to as the"Third Pole in the World".They are especially distributed in high mountains along the eastern edge of the plateau,forming a belt of travertine from northeast to southwest.These travertine formations in the high-altitude regions are predominantly found above the Quaternary ancient glaciers,closely associated with the development and distribution of these glaciers.Hence,the travertine geomorphology in these high-altitude areas may serve as evidence of the Quaternary glacial activities.Therefore,aiming to provide evidence for the Quaternary glacier activities,this study selects surface-exposed travertine in the Yulongxi area on the western side of Gongga mountain as the research subject to analyze records of glacial activities in high-altitude travertine.The specific research methods employed in this study are as follows:(1)conducting field geological work to survey glacial landforms surrounding travertine,such as glacial striations,sheep back stones,etc.,and collecting samples of moraines on and near the old travertine bodies;(2)utilizing GF-05 satellite hyperspectral remote sensing data to interpret the lithology of travertine developed in the fault zone of the Yulongxi area,thereby obtaining the distribution characteristics of travertine in the study area;(3)employing drones to perform low-altitude photogrammetric surveys on several typical travertine bodies in the study area,constructing refined DEMs and 3D models to analyze the distribution patterns and geomorphological characteristics of travertine,and combining terrain features to analyze the formation of sheep back stones and whalebacks;(4)using XRD testing technology to analyze the compositions of moraines and comparing the s

关 键 词：贡嘎山 高寒钙华 高光谱遥感 地形分析 冰川活动 

分 类 号：P931.4[天文地球—自然地理学]