{"id":"9de95626-a101-46b5-83ed-bd6e4180d015","title":"藏东花岗岩锆石U-Pb测年及Hf同位素数据","title_en":"Zircon U-Pb dating and Hf isotope data of granite in eastern Tibet","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":"藏东花岗岩锆石U-Pb测年数据.docx\n藏东花岗岩锆石Hf同位素数据.docx","description":"锆石的分选采用重液和磁选方法在河北省地质队实验室完成。运用阴极发光图像来观测锆石颗粒的内部结构并选取合适的点位用以分析研究。U、Th、Pb 的测定在中国科学院青藏高原研究所LA⁃ICP⁃MS进行，详细分析方法见Li et al（. 2009）。锆石标样与锆石样品以1∶3 比例交替测定。U⁃Th⁃Pb 同位素比值用标准锆石Plésovice（337 Ma，Sláma et al.，2008）校正获得，以标准样品Qinghu（159.5 Ma，Li et al.，2009）作为未知样监测数据的精确度。同位素比值及年龄误差均为1σ。数据结果处理采用ISOPLOT 软件（Ludwig，2001）。在锆石U⁃Pb定年的基础上，选择谐和度较好的年龄点，在与年龄点环带趋势一致的微区圈定Hf同位素点位。锆石Hf 同位素分析利用Neptune Plusma II 多接收等离子质谱仪和 NWR193UC 193 nm激光取样系统上进行，仪器详细步骤参见 Liu et al（. 2008）。激光剥蚀斑束直径一般为60 μm，每一测点包含有10 s 预剥蚀，45 s 剥蚀和30 s 的清洗时间。样品测试过程中以91500 作为标样，其176Hf/177Hf = 0.282 286±12（2σ，n = 21）。","doi":"10.11888/SolidEar.tpdc.272188","projection":"","language":"zh","share_type":"offline","east":99.0,"west":98.0,"south":28.0,"north":30.0,"scale":null,"crs":null,"filesize":1.0,"share_policy":"c","ts_created":"2022-03-20T15:41:52.885336+08:00","doi_type":"拥有自主知识产权","ts_updated":"2022-03-23T16:18:55.135789+08:00","time_description":"2021","datas_group":0,"time_description_en":"2021","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":"1 year < x < 10 year","spatial_resolution":"100km - 1000km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[789],"subtopics":{"metadata":"9de95626-a101-46b5-83ed-bd6e4180d015","three_pole":null,"third_pole":null},"username":"戴福初","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":68}