本数据集包括塔克拉玛干沙漠中南部6个晚更新世-全新世地层剖面（钻孔）的采样深度、粒度（中值粒径和平均粒径）、TOC、磁化率（低频）、色度（Lab）数据。数据集中粒度分析利用英国 Malvern 公司生产的 Mastersizer 2000 激光粒度仪，仪器测量范围为 0.02-2000µm，误差＜1%。色度测量使用日本美能达公司生产的CM700d分光测色计，仪器采用Lab表色系统，测量光谱范围为400-700nm可见光，分辨率为10nm。TOC采用重铬酸钾分光光度法。磁化率测量使用英国产Bartington 磁化率仪测定，依据GB/T 35690-2017弱磁材料磁导率测量方法。数据集共计220个样品，229条记录。
", "ds_source": "通过对塔克拉玛干沙漠中南部6个野外地层剖面（钻孔）进行测量，并按一定间距采集相应层位的样品。在实验室对样品环境代用指标进行测试前处理，运用相关专业仪器测试，以此来获得最终数据。本数据集适用于沙漠土壤性质以及环境状况的研究和调查。
", "ds_process_way": "\"在剖面（钻孔）中等间距采集100g左右粉末样品编号记录。\n1.粒度测量方法\n粒度分析利用英国 Malvern 公司生产的 Mastersizer 2000 激光粒度仪，需要进行前处理，称取适量样品加入烧杯中，先加入 10ml 浓度为 13 的 H2O2溶液 加热以去除有机质，再加入 10ml 浓度为 1：3 的 HCl 溶液以去除碳酸盐，待充分反应后取下烧杯并加满蒸馏水静置约 12 小时，然后用橡胶管将烧杯上层清液抽出，抽至约剩余 20ml 溶液。最后加入 10ml 浓度为 0.05mol/L 的六偏磷酸钠， 将烧杯放入超声清洗器中振荡 5-7 分钟使样品颗粒充分分散后可上机测试。仪器测量范围为 0.02-2000µm，误差＜1%。\n2.磁化率测量方法\n样品磁化率测前在 45°C 干燥 24 小时以除去水分对磁化率的影响，然后取干燥后的样品10g在Bartington MS2型磁化率仪上测量低频（0.47k Hz）。\n\"
", "ds_quality": "数据集中粒度分析利用英国 Malvern 公司生产的 Mastersizer 2000 激光粒度仪，仪器测量范围为 0.02-2000µm，误差＜1%。该数据按照中华人民共和国国家标准，粒度分布激光衍射法GB/T 19077-2016/ISO13320:2009。粒度分析数据由 Mastersizer 2000 配套软件导出，根据 Folk-Ward 公式 可算出粒度参数（任明达和王乃梁，1981；Folk 和 Ward，1957）。色度测量使用日本美能达公司生产的CM700d分光测色计，仪器采用Lab表色系统，测量光谱范围为400-700nm可见光，分辨率为10nm。TOC采用重铬酸钾分光光度法，参考GB/T 32116-2015总有机碳(TOC)的测定。磁化率测量使用英国产Bartington 磁化率仪测定，依据GB/T 35690-2017弱磁材料磁导率测量方法。
", "ds_acq_start_time": null, "ds_acq_end_time": null, "ds_acq_place": "塔克拉玛干沙漠", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 272446, "ds_files_count": 7, "ds_format": "电子表格", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "b6fce7b0-5da7-40a0-8663-71308c46b2e6.jpg", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "a5877b42-96ea-4f13-af7e-246f355413d6", "doi_value": "", "subject_codes": [ "170.50" ], "quality_level": 1, "publish_time": "2024-09-25 12:12:44", "first_publish_time": "2024-09-25 12:12:44", "last_updated": "2025-03-07 15:31:27", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.XIEG.XJSEDATA.2022.00009165", "license": null, "extra": null, "files_shape": [ { "name": "实体数据", "size": null, "is_dir": true }, { "name": "附件", "size": null, "is_dir": true } ], "features": null, "data_level": 0, "i18n": { "en": { "title": "Data set of late Pleistocene palaeoenvironmental proxy indicators in Taklimakan Desert (2023)", "ds_abstract": "This dataset includes sampling depth, grain size (median and average grain size), TOC, magnetic susceptibility (low frequency), and chromaticity (Lab) data of 6 Late Pleistocene-Holocene stratigraphic sections (boreholes) in the central and southern Taklimakan Desert. Particle size analysis in the data center uses a Mastersizer 2000 laser particle size meter produced by Malvern Company in the United Kingdom. The instrument measurement range is 0.02-2000µm, with an error of less than 1%. The chromaticity measurement uses a CM700d spectrophotometer produced by Minolta Corporation of Japan. The instrument uses a Lab color system to measure visible light in the spectral range of 400-700nm and a resolution of 10nm. TOC was determined by potassium dichromate spectrophotometry. The magnetic susceptibility was measured using a Bartington magnetic susceptibility meter made in the UK, and was based on GB/T 35690-2017 Method for Measuring Permeability of Weakly Magnetic Materials. The data set contains a total of 220 samples and 229 records.
", "ds_source": "By measuring 6 field stratigraphic sections (boreholes) in the central and southern parts of the Taklimakan Desert, samples from corresponding horizons were collected at certain intervals. The sample environmental proxy indicators are processed pre-test in the laboratory and tested with relevant professional instruments to obtain the final data. This dataset is suitable for the study and investigation of desert soil properties and environmental conditions.
", "ds_process_way": "\"Collect powder samples of about 100g at moderate intervals in the section (borehole) and record the number.\n1. Particle size measurement method\nParticle size analysis uses a Mastersizer 2000 laser particle size analyzer produced by Malvern Company in the United Kingdom, which requires pretreatment. Weigh a suitable amount of sample and add it to a beaker. First add 10ml of H2O2 solution with a concentration of 13 to heat to remove organic matter, and then add 10ml of a concentration of 1:3 to remove carbonate. After sufficient reaction, remove the beaker and fill it with distilled water and let it stand for about 12 hours. Then use a rubber tube to withdraw the supernatant from the beaker until about 20ml of solution remain. Finally, add 10ml of sodium hexametaphosphate with a concentration of 0.05 mol/L, place the beaker in an ultrasonic cleaner and shake for 5-7 minutes to fully disperse the sample particles and then can be tested on the machine. The measurement range of the instrument is 0.02-2000µm, with an error of less than 1%.\n2. Magnetic susceptibility measurement method\nThe sample was dried at 45°C for 24 hours before measurement of magnetic susceptibility to remove the effect of moisture on the magnetic susceptibility. Then 10g of the dried sample was taken to measure the low frequency (0.47 kHz) on a Bartington MS2 magnetic susceptibility meter.\n\"
", "ds_quality": "Particle size analysis in the data center uses a Mastersizer 2000 laser particle size meter produced by Malvern Company in the United Kingdom. The instrument measurement range is 0.02-2000µm, with an error of less than 1%. This data is in accordance with the national standard of People's Republic of China, Particle Size Distribution Laser Diffraction Method GB/T 19077-2016/ISO13320:2009. The particle size analysis data are exported by Mastersizer 2000 supporting software, and the particle size parameters can be calculated according to the Folk-Ward formula (Ren Mingda and Wang Nailiang, 1981;Folk and Ward, 1957). The chromaticity measurement uses a CM700d spectrophotometer produced by Minolta Corporation of Japan. The instrument uses a Lab color system to measure visible light in the spectral range of 400-700nm and a resolution of 10nm. TOC is carried out by potassium dichromate spectrophotometry, and refers to GB/T 32116-2015 for determination of total organic carbon (TOC). The magnetic susceptibility was measured using a Bartington magnetic susceptibility meter made in the UK, and was based on GB/T 35690-2017 Method for Measuring Permeability of Weakly Magnetic Materials.
", "ds_acq_place": "taklimakan desert", "ds_format": "spreadsheet" } }, "license_type": null, "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "晚更新世", "TOC", "粒度", "色度", "磁化率" ], "ds_subject_tags": [ "地质学" ], "ds_class_tags": [], "ds_locus_tags": [ "塔克拉玛干沙漠" ], "ds_time_tags": [ 2023 ], "ds_contributors": [ "高鑫", "周杰", "赵永成" ], "ds_meta_authors": [ "周杰" ], "ds_managers": [ "周杰" ], "category": "沙漠与荒漠化" }