本数据集主要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）的位置、OSL年代与深度，同时含有剖面（钻孔）的部分代表性环境代用指标，如粒度（平均粒径）、TOC、磁化率（低频）、色度（a*）数据。数据集中OSL年代De值测试仪器为丹麦产的 Risø TL/OSL-DA-15 reader，测年材料为钾长石90-150 μm，环境剂量率放射性元素 U、Th、K 含量使用中子活化法（NAA）测量，在计算钾长石内剂量率时，采用 12.5±0.5%的钾元素含量，样品含水量估计值为5%±3%。色度测量利用日本美能达公司生产的CM700d分光测色计，该仪器采用Ｌab表色系统，测量光谱范围为400-700nm可见光，分辨率为10nm。磁化率使用英国产Bartington 磁化率仪测定。TOC采用重铬酸钾分光光度法。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%。共计220个样品，262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。在实验室对样品进行光释光测年和环境代用指标测试前处理，并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": "\"1.OSL年代样品采集与测量\nOSL年代样品采集时尽可能避光，用黑布挡阳光，在剖面上选取细粉砂、亚砂土取样，然后将不锈钢管（直径为50mm，30 cm长）水平敲入取样层位，装满后取出，用黑塑料带封装。 \n在暗室，取出样品削去表层2-5 mm放进容器里浸泡、搅拌、洗涤。之后加20% 的H2O2, 除去有机质,再加10%的HCl处理，去掉碳酸钙， 搅拌，直至无泡为止。过筛提取粗颗粒(选择90-125 μm颗粒成分)组分，放进烘干箱。取出烘干样品20-30g， 放入避光的试管内，加2.72 的重液，摇均、沉淀24-36 h。取出重液分离的浮上部分，洗净， 装入避光容器、烘干、加40% 的FH溶液，振荡溶蚀40-45分钟洗净。加1M 的HCl溶液去除氟化物，用蒸馏水洗净、烘干，再用磁铁吸去重矿物，得到较纯的石英矿物颗粒。用硅油粘在直径约lmm的不锈钢圆片上制成测样。OSL年代De值测试仪器为丹麦产的 Risø TL/OSL-DA-15 reader，测年材料为钾长石90-150um，环境剂量率放射性元素 U、Th、K 含量使用中子活化法（NAA）测量，在计算钾长石内剂量率时，采用 12.5±0.5%的钾元素含量，样品含水量估计值为5%±3%。\n2.环境代用指标采集测试\n在剖面（钻孔）中等间距采集100g左右粉末样品编号记录。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）；样品色度测量前，取干燥后的样品5g研磨至颗粒均匀，在日本美能达公司生产的CM700d分光测色计上测量，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。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10%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分钟,分分散后可上机测试。\n\"
", "ds_quality": "数据集中OSL年代De值测试仪器为丹麦产的 Risø TL/OSL-DA-15 reader，测年材料为钾长石90-150um，环境剂量率放射性元素 U、Th、K 含量使用中子活化法（NAA）测量，在计算钾长石内剂量率时，采用 12.5±0.5%的钾元素含量，样品含水量估计值为5%±3%。色度测量利用日本美能达公司生产的CM700d分光测色计，该仪器采用Ｌab表色系统，测量光谱范围为400-700nm可见光，分辨率为10nm。磁化率使用英国产Bartington 磁化率仪测定，依据GB/T 35690-2017弱磁材料磁导率测量方法。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。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）。
", "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": 457438, "ds_files_count": 13, "ds_format": "电子表格", "ds_space_res": null, "ds_time_res": "逐月", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "8072ec64-2156-46c1-8298-7306c9130fd6.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 12:05:39", "first_publish_time": "2024-09-25 12:05:39", "last_updated": "2025-03-07 15:36:12", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.XIEG.XJSEDATA.2022.00009164", "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": "Geochronology of Late Pleistocene strata in the Taklimakan Desert", "ds_abstract": "This dataset mainly includes the location, OSL age and depth of 6 Late Pleistocene-Holocene stratigraphic sections (boreholes) in the central and southern Taklimakan Desert. It also contains some representative environmental proxy indicators of the sections (boreholes), such as grain size (average particle size), TOC, magnetic susceptibility (low frequency), and chroma (a*) data. The OSL dating De value testing instrument in the data set is Risø TL/OSL-DA-15 reader made in Denmark. The dating material is potassium feldspar 90-150 μm. The environmental dose rate and the content of radioactive elements U, Th and K are measured using the neutron activation method (NAA). When calculating the internal dose rate of potassium feldspar, the potassium content of 12.5±0.5%, and the estimated water content of the sample is 5%±3%. The chromaticity measurement uses the CM700d spectrophotometer produced by Minolta Corporation of Japan. The instrument uses a Lab color system and measures visible light in the spectral range of 400-700nm with a resolution of 10nm. The magnetic susceptibility was measured using a Bartington magnetic susceptibility meter made in the United Kingdom. TOC was determined by potassium dichromate spectrophotometry. Particle size analysis uses a Mastersizer 2000 laser particle size analyzer produced by Malvern Company in the United Kingdom. The instrument measurement range is 0.02-2000µm, with an error of less than 1%. A total of 220 samples and 262 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. Samples were subjected to photoluminescence dating and pre-treatment for environmental proxy index testing 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": "\"1. OSL dating sample collection and measurement\nWhen collecting OSL dating samples, try to avoid light as much as possible, use black cloth to block the sun, select fine silt sand and sandy soil on the section to sample, and then knock a stainless steel tube (50mm in diameter, 30 cm in length) horizontally into the sampling level, fill it up, take it out and seal it with black plastic tape. \nIn a dark room, take out the sample and scrape off the surface layer by 2-5 mm, place it in a container to soak, stir, and wash. Then add 20% H2O2 to remove organic matter, add 10% HCl to remove calcium carbonate, and stir until there is no foam. Sieve and extract the coarse particle components (select 90-125 μm particle components) and place them in the drying oven. Remove 20-30g of dried sample, place it into a test tube protected from light, add 2.72 of heavy solution, shake and precipitate for 24-36 hours. Remove the floating part separated from the heavy liquid, wash it, place it into a light-protected container, dry it, add 40% FH solution, shake and dissolve for 40-45 minutes, and wash it. Add 1M HCl solution to remove fluoride, wash it with distilled water, dry it, and then use a magnet to absorb heavy minerals to obtain purer quartz mineral particles. Use silicone oil to stick it on a stainless steel disk with a diameter of about 1mm to make a test sample. The OSL dating De value testing instrument is Risø TL/OSL-DA-15 reader made in Denmark. The dating material is potassium feldspar 90-150um. The environmental dose rate radioactive elements U, Th, and K are measured using the neutron activation method (NAA). When calculating the internal dose rate of potassium feldspar, the potassium content of 12.5±0.5%, and the estimated water content of the sample is 5%±3%.\n2. Collection and testing of environmental proxy indicators\nCollect powder samples of about 100g at moderate intervals in the section (borehole) and record the number. The sample was dried at 45°C for 24 hours before magnetic susceptibility measurement to remove the effect of moisture on the magnetic susceptibility. Then 10g of the dried sample was taken to measure the low frequency on a Bartington MS2 type magnetic susceptibility meter (0.47kHz); Before sample chromaticity measurement, take 5g of the dried sample and grind it until the particles are uniform, and measure it on a CM700d spectrophotometer produced by Minolta Corporation of Japan. The instrument uses a Lab color system. The measurement spectral range is 400-700nm visible light, and the resolution is 10nm. TOC was determined by potassium dichromate spectrophotometry. Particle 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 10% and heat it to remove organic matter, and then add 10ml 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 minutes, and then disperse it can be tested on the machine.\n\"
", "ds_quality": "In the data set, Risø TL/OSL-DA-15 reader produced in Denmark is used for measuring the De value of OSL age. The dating material is potassium feldspar 90-150um. The contents of radioactive elements U, Th and K in environmental dose rate are measured by neutron activation method (NAA). When calculating the internal dose rate of potassium feldspar, the potassium element content of 12.5±0.5% is adopted, and the estimated water content of samples is 5%±3%. The chromaticity measurement uses the CM700d spectrophotometer produced by Minolta Corporation of Japan. The instrument uses a Lab color system and measures visible light in the spectral range of 400-700nm with a resolution of 10nm. Magnetic susceptibility is measured by Bartington magnetic susceptibility meter made in England according to GB/T 35690-2017 Method for measuring permeability of weak magnetic materials. TOC is determined by potassium dichromate spectrophotometry, refer to GB/T 32116-2015 Total organic carbon (TOC). Particle size analysis uses a Mastersizer 2000 laser particle size analyzer 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).
", "ds_acq_place": "taklimakan desert", "ds_format": "spreadsheet", "ds_time_res": "month by month" } }, "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": [ "全新世", "晚更新世", "光释光" ], "ds_subject_tags": [ "地质学" ], "ds_class_tags": [], "ds_locus_tags": [ "塔克拉玛干沙漠" ], "ds_time_tags": [], "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" }