碎屑组分和锆石U-Pb测年的样品，来源于银川盆地PL02钻孔底部，其深度为699.9 m，该段岩性为砂岩，基于前人对银川盆地钻孔的古地磁定年得到其形成年代为3.31 Ma。
", "ds_source": "锆石U-Pb同位素测年分析利用亚利桑那大学同位素地球化学实验室激光年代测试中心的多接收激光烧蚀-等离子体质谱仪(Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometer)进行测量。准分子激光剥蚀利用Photon Machines Inc.公司生产的Analyte-G2 ArF 193nm进行。激光束斑的直径设定成30 μm，利用氦气作为剥蚀物载气，氩气作为调节灵敏度的补偿气。普通Pb校正使用Andersen的处理方法，单一数据点的误差均为1σ。
\n碎屑组分统计采用Gazzi-Dickinson的方法进行栅格结点统计，样品中超过300个碎屑颗粒被统计，该实验统计在意大利米兰比可卡大学沉积物源分析实验室完成。
", "ds_process_way": "锆石U-Pb年龄结果均经过最佳年代和不谐和度筛选，其标准为：（1）最佳年龄：如果206Pb/238U<1000 Ma，则采用206Pb/238U值作为最佳年龄；如果206Pb/238U>1000 Ma，则采用207Pb/206Pb值作为最佳年龄。（2）不谐和度（discordance）过滤：最佳年龄<1000 Ma，不谐和度=(207Pb/235U-206Pb/238U)/ 207Pb/235U×100）；最佳年龄>1000 Ma，不谐和度=(207Pb/206Pb-206Pb/238U)/ 207Pb/206Pb×100）；选择不谐和度在-10%~15%之间的最佳年龄作为有效年龄。
", "ds_quality": "锆石U-Pb同位素测年单一数据点的误差均为1σ。
", "ds_acq_start_time": "2020-12-01 00:00:00", "ds_acq_end_time": "2022-03-01 00:00:00", "ds_acq_place": "银川盆地", "ds_acq_lon_east": 106.53333333333333, "ds_acq_lat_south": 38.86666666666667, "ds_acq_lon_west": 106.53333333333333, "ds_acq_lat_north": 38.86666666666667, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 143584, "ds_files_count": 2, "ds_format": "Excel", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "1a586f59-f587-4e51-8115-69bb9ae0e8cf.jpg", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "52b7b79b-860c-49a5-9083-9a70cf8bed5a", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "lihongxing@lzb.ac.cn", "doi_value": "10.12072/ncdc.GEOCHEM.db2391.2022", "subject_codes": [ "170.50" ], "quality_level": 3, "publish_time": "2022-08-25 17:49:41", "last_updated": "2025-04-24 17:19:57", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.GEOCHEM.db2391.2022", "i18n": { "en": { "title": "Zircon U-Pb and Detrital Component Data from the Basal Section of Borehole PL02 in the Yinchuan Basin", "ds_format": "Excel", "ds_source": "Zircon U-Pb isotopic dating was performed using a Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometer (LA-MC-ICP-MS) at the Laser Chronology Center, Isotope Geochemistry Laboratory, University of Arizona. Laser ablation was conducted with a Photon Machines Inc. Analyte-G2 ArF 193 nm excimer laser system. The laser spot diameter was set to 30 μm, with helium as the ablation carrier gas and argon as the sensitivity-enhancing makeup gas. Common Pb correction followed the Andersen method, and uncertainties for individual analyses are reported at the 1σ level.
\nDetrital component statistics were obtained using the Gazzi-Dickinson method for grid-node counting. Over 300 detrital grains per sample were analyzed, with the experiments completed at the Sediment Provenance Analysis Laboratory, University of Milano-Bicocca, Italy.
", "ds_quality": "Uncertainties for individual zircon U-Pb isotopic analyses are reported at the 1σ level.
", "ds_ref_way": "", "ds_abstract": "Samples for detrital component analysis and zircon U-Pb dating were collected from the basal section of Borehole PL02 in the Yinchuan Basin at a depth of 699.9 m. The lithology of this interval is sandstone, and its formation age is constrained to 3.31 Ma based on previous paleomagnetic dating of boreholes in the Yinchuan Basin.
", "ds_time_res": "", "ds_acq_place": "Yinchuan Basin", "ds_space_res": "", "ds_projection": "", "ds_process_way": "The zircon U-Pb age results are all filtered for best age and discordance with the following criteria: (1) Best age: if 206Pb/238U<1000 Ma, the 206Pb/238U value is used as the best age; if 206Pb/238U>1000 Ma, the 207Pb/206Pb value is used as the best age. (2) Discordance (discordance) filter: optimal age <1000 Ma, discordance = (207Pb/235U-206Pb/238U)/ 207Pb/235U×100); optimal age >1000 Ma, discordance = (207Pb/206Pb-206Pb/238U)/ (207Pb/206Pb × 100); the optimal age with discordance between -10% and 15% was chosen as the effective age.
", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "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": [ "U-Pb数据", "碎屑组分数据", "PL02钻孔底部锆石" ], "ds_subject_tags": [ "地质学" ], "ds_class_tags": [], "ds_locus_tags": [ "银川盆地" ], "ds_time_tags": [ 2020, 2021 ], "ds_contributors": [ { "true_name": "王钊", "email": "wangzhao@sxnu.edu.cn", "work_for": "山西师范大学", "country": "中国" }, { "true_name": "聂军胜", "email": "jnie@lzu.edu.cn", "work_for": "兰州大学资源环境学院", "country": "中国" }, { "true_name": "彭文彬", "email": "pengwb14@163.com", "work_for": "枣庄学院旅游与资源环境学院", "country": "中国" }, { "true_name": "张浩博", "email": "hbzhang17@lzu.edu.cn", "work_for": "兰州大学资源环境学院", "country": "中国" }, { "true_name": "李峁潼", "email": "352353479@qq.com", "work_for": "兰州大学资源环境学院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "王钊", "email": "wangzhao@sxnu.edu.cn", "work_for": "山西师范大学", "country": "中国" } ], "ds_managers": [ { "true_name": "王钊", "email": "wangzhao@sxnu.edu.cn", "work_for": "山西师范大学", "country": "中国" } ], "category": "其他" }