Detrital zircon (U-Th)/He thermochronometry data from the Leones Valley, Patagonian Andes

The data presented here were produced to study glacial and glacio-fluvial catchment erosion using 'tracer thermochronology' where detrital downstream samples can be used to infer the source elevation sectors of sediments when integrated with known surface bedrock ages from the catchment. For the first time, our study used the zircon (U-Th)/He (ZHe) method as tracer thermochronometer. The samples come from the Leones Valley at the northeastern flank of the Northern Patagonian Icefield, Chile (46.7° S) This data set comprises ZHe analytical results from (i) six detrital samples of different depositional age and grain size (622 single-grain analyses in total), and (ii) two previously analyzed (Andrić-Tomašević et al., 2021) bedrock samples (22 single-grain analyses in total), as well as grain size measurements and lithology identification of two of the detrital samples (two pebble samples with 262 and 211 pebbles, respectively). Data are provided in 10 tab-delimited text files. The full description of the data and methods is provided in the data description file.

本数据集收录的数据，旨在借助示踪热年代学（tracer thermochronology）方法开展冰川与冰川-河流流域侵蚀研究。当结合流域内已知的地表基岩年龄进行整合分析时，可通过下游碎屑沉积物样本反推沉积物的源区海拔分区。本研究首次将锆石（U-Th）/He（ZHe）测年法用作示踪热年代计。样本采集自智利北巴塔哥尼亚冰场（Northern Patagonian Icefield）东北侧翼的莱昂斯谷（Leones Valley），地理坐标为南纬46.7°。本数据集包含两类锆石（U-Th）/He分析结果：其一为6件不同沉积年代、不同粒度的碎屑样本的单颗粒测试数据，总计622组单颗粒分析结果；其二为2件此前已发表的基岩样本（Andrić-Tomašević等人，2021）的单颗粒测试数据，总计22组单颗粒分析结果。此外，本数据集还包含2件碎屑样本的粒度测量与岩性鉴定数据，这两件样本分别为包含262颗砾石和211颗砾石的砾石样本。所有数据以10个制表符分隔的文本文件形式提供。数据与实验方法的完整说明详见数据描述文件。