用于测定大荔人年代的5个地层剖面数据集

大荔人(Dali Man)是在大荔发现的古人类化石基础上定义的人群。为了从区域河湖地貌演化角度探究大荔人生活的年代，作者于2015年8-10月对渭河盆地东北部的合阳-韦庄湖积台地及大荔人化石点周围河湖阶地进行了细致地野外地貌第四纪调研。分别在富礼坊、下辛庄、白起寺、中淳风、解放村等附近采集了1215个黄土和河湖相沉积剖面样品。室内磁化率数据应用Bartington MS2型磁化率仪获得。粒度分析时，含砾石和粗砂的样品用过筛法测量；粉砂及黏土样品用LS13320型激光粒度分析仪测量。全部剖面测试数据汇集得到“用于测定大荔人年代的5个地层剖面数据集”。该数据集支持了“含大荔人化石的沉积层发生于L6晚期一次湖退后，其堆积时代与S5古土壤发育时代相当，平均年龄约0.55 Ma BP”的科学结论。该数据集包括：（1）5个地层剖面地理位置数据；（2）5个地层剖面的磁化率数据；（3）大荔人化石点剖面的考察照片资料；（4）大荔人化石点地层剖面的河湖相沉积层粒度数据。数据集存储为.shp、.kmz、.jpg和.xlsx格式，压缩后数据量为35.6MB。本数据集的分析研究成果发表在《地理学报》2016年71卷第5期。

Dali Man refers to the archaic hominin group defined based on ancient human fossils unearthed in Dali. To explore the living age of Dali Man from the perspective of regional fluvial-lacustrine landform evolution, the authors conducted detailed Quaternary geomorphological field surveys on the Heyang-Weizhuang lacustrine platform in the northeastern Weihe Basin and the fluvial-lacustrine terraces surrounding the Dali Man fossil site between August and October 2015. A total of 1215 loess and fluvial-lacustrine sedimentary section samples were collected near Fulifang, Xiaxinzhuang, Baiqisi, Zhongchunfeng, Jiefangcun and other locations. Magnetic susceptibility measurements were conducted in the laboratory using a Bartington MS2 magnetic susceptibility meter. For grain size analysis, samples containing gravel and coarse sand were measured via the dry sieving method, while silt and clay samples were analyzed using a LS13320 laser particle size analyzer. All analytical data from the stratigraphic sections were compiled into the "Five Stratigraphic Section Dataset for Dating Dali Man". This dataset supports the scientific conclusion that the sedimentary layer bearing Dali Man fossils was deposited following a lacustrine regression event in the late L6 period, whose accumulation age corresponds to the development period of the S5 paleosol, with an average age of approximately 0.55 Ma BP. This dataset includes: (1) Geographic location data of the five stratigraphic sections; (2) Magnetic susceptibility data of the five stratigraphic sections; (3) Field photos of the stratigraphic section at the Dali Man fossil site; (4) Grain size data of the fluvial-lacustrine sedimentary layers in the stratigraphic section at the Dali Man fossil site. The dataset is stored in .shp, .kmz, .jpg and .xlsx formats, with a compressed total size of 35.6 MB. Analytical and research findings based on this dataset were published in *Acta Geographica Sinica*, Volume 71, Issue 5, 2016.

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背景概述

该数据集旨在通过区域地貌-沉积环境演化历史来测定大荔人年代，基于2015年在渭河盆地东北部开展的野外调查，采集了五个黄土剖面的1215个样品，并测量了磁化率和粒度数据。数据集包含剖面位置、磁化率、大荔人遗址照片和粒度值等文件，支持大荔人化石沉积年代约为0.55 Ma BP的科学结论，数据以.shp、.kmz、jpg和.xlsx格式存储，相关研究发表于《地理学报》。