地质论评2026，Vol.72Issue(1)：305-313,9.DOI:10.16509/j.georeview.2025.07.095
花岗岩表面侵蚀速率估算
Estimation of erosion rate of granite surfaces
摘要
Abstract
Terrestrial in situ cosmogenic nuclide(TCN)10Be exposure dating method is currently one of the most successful dating methods for glacier geomorphology,and this technology has made significant contributions to global glacier geomorphological dating.During the dating process,granite samples are usually selected for dating.However,granite exposed over millennia is subject to weathering,which reduces the concentration of cosmogenic nuclide Be-10 on the surface,leading to an underestimation of the exposure age of the landform.Thus,we aim to quantify the erosion rate of granite over millennial timescales to improve the accuracy of cosmogenic nuclide exposure dating.This application is crucial for understanding evolution of glacial landforms.This study focuses on the palaeo-Daocheng ice cap,where the Be-10 exposure dating technique was applied to determine the surface exposure ages of granites with varying degrees of weathering.Six granite samples sites and twelve Be-10 age samples were processed.By combining the weathering thickness difference,the erosion rates of granite samples were estimated.The results from six granite sample sites and twelve Be-10 age samples indicate that the erosion rate of granite in the palaeo-Daocheng ice cap area ranges from 1.3 mm/ka to 3.6 mm/ka over the past 30 ka.This study provides a reliable reference for estimating sample erosion rates in cosmogenic nuclide exposure dating.关键词
宇生核素暴露测年方法/Be-10/花岗岩/侵蚀速率/稻城古冰帽Key words
terrestrial in situ cosmogenic nuclides exposure dating/Beryllium-10/granite/erosion rate/palaeo-Daocheng ice cap引用本文复制引用
梁兴江,陈麓名,张志刚,郑超刚,赵丹,李奕曼,卢楠心,张红梅..花岗岩表面侵蚀速率估算[J].地质论评,2026,72(1):305-313,9.基金项目
本文为国家自然科学基金资助项目(编号:41971009)的成果. This paper is supported by the Project of National Natural Science Foundation of China(No.41971009) （编号:41971009）
