{"id":"05b581fa-63d0-478f-bc26-344ea6d9a1ef","title":"青藏高原及邻区山地构造侵蚀热年代学数据集","title_en":"Thermochronologic data of tectonic exhumation in the Tibetan Plateau and vicinities","serial":"","user_limit":"为尊重知识产权、保障数据作者的权益、扩展数据中心的服务、评估数据的应用潜力，请数据使用者在使用数据所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明数据来源和数据作者。对于转载（二次或多次发布）的数据，作者还须注明原始数据来源。","instructions":"文件命名：磷灰石裂变径迹单颗粒年龄数据以.xlsx文件格式存储，文件名称为“Apatite Fission Track Thermochronologic Data from the Northern Qaidam Basin”。数据读取方式：该数据集可以直接用Excel程序打开并查看。","description":"青藏高原北部新生代构造剥露过程的时间约束能为高原隆升过程及该区构造-气候-侵蚀相互作用过程研究提供依据。磷灰石裂变径迹热年代学的封闭温度较低（~100℃），能够记录地壳浅部发生的剥露过程。在柴达木盆地北缘红柳沟剖面新生代路乐河组-狮子沟组地层采集了26个沉积岩屑样品，并在中科院西北生态环境资源研究院以外探测器法进行裂变径迹测年。这些样品获得的磷灰石裂变径迹中心年龄在36.4 ± 2.0 Ma到78.0 ± 2.8 Ma。多数样品未通过卡方检验，指示多个冷却年龄岩体混合的碎屑源区。使用二项式拟合法分解每个样品的混合单颗粒年龄，获得55个年龄组分，拟合组分年龄在21.2 ± 2.9 Ma到102.8 ± 9.0 Ma。结合封闭径迹长度和拟合组分年龄，认为剖面2500m以上样品未发生沉积后埋藏退火作用，2500m以下样品沉积后裂变径迹部分退火。未退火裂变径迹年龄在~60-50 Ma和40-36 Ma分别表现为“静态峰”，指示碎屑物源区祁连山在这两时期分别发生显著岩石剥露。本研究揭示青藏高原北缘新生代构造变形开始于早新生代，与印度-欧亚板块碰撞时间几乎同步，指示祁连山在早新生代即是青藏高原的北部边界。","doi":"10.11888/SolidEar.tpdc.271853","projection":null,"language":"zh","share_type":"offline","east":97.0,"west":93.0,"south":37.0,"north":39.0,"scale":null,"crs":null,"filesize":0.13,"share_policy":"c","ts_created":"2021-11-24T18:30:27.716237+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-11-24T18:59:25.613425+08:00","time_description":"白垩纪-新生代","datas_group":0,"time_description_en":"Cretaceous-Cenozoic","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"李明慧","username":"李明慧","email":"liminghui@itpcas.ac.cn","is_cancel_expert":false}],"review_editor":{"id":42421,"last_login":"2022-04-08T15:16:51.670544+08:00","username":"任慧霞","email":"510727846@qq.com","is_active":true,"is_staff":true,"user_name":"任慧霞"},"data_sources":null,"temporal_resolution":"1000 year < x","spatial_resolution":"0.5º - 1º","license":"Attribution 4.0 International (CC BY 4.0)","fund":[694,700],"subtopics":{"metadata":"05b581fa-63d0-478f-bc26-344ea6d9a1ef","three_pole":null,"third_pole":null},"username":"颜茂都","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":498}