{"id":"d8145d13-5e31-41fd-a9db-922183ad1a9b","title":"云南剑川盆地古近纪地层碎屑锆石U-Pb年龄数据","title_en":"Detrital zircon U-Pb age of Paleogene strata in Jianchuan basin, Yunnan Province","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":"云南剑川盆地古近纪地层碎屑锆石U-Pb年龄数据.xls","description":"剑川盆地是青藏高原东南缘最主要的新生代盆地之一，是研究青藏高原东南部新生代水系和构造时空演化的关键区域。剑川盆地古近纪地层从下至上依次出露宝相寺组、双河组和剑川组。双河组整合覆盖在宝相寺组之上，而与上覆剑川组呈角度不整合接触关系。利用LA-ICP-MS共测得12件剑川盆地古近纪地层砂岩碎屑锆石U-Pb年龄数据。结果显示宝相寺组碎屑锆石U-Pb年龄谱具有200-320Ma、390-490Ma、690-920Ma、920-1120Ma和1700-2000Ma多个年龄峰值区间（与上覆地层具有明显的区别），而双河组几乎全部集中于35-45Ma和200-280Ma，剑川组相对双河组增加了720-900Ma年龄峰值区间，表明剑川盆地宝相寺组与上覆地层之间（41Ma左右）发生了重大物源变化。宝相寺组物源来自可可西里板块、松潘-甘孜板块、北羌塘板块、义敦地体和扬子板块西缘，双河组物源主要来自盆地周边三叠系和同期火成岩，剑川组物源主要来自扬子板块西缘、盆地周边三叠系和同期火成岩。在宝相寺组沉积期间可能存在一个连接青藏高原与红河的古水系，但该水系于41Ma左右瓦解。物源和水系的重大改变可能与青藏高原东南部构造抬升和始新世大规模岩浆活动有关。","doi":"10.11888/Geo.tpdc.271770","projection":"","language":"zh","share_type":"online","east":100.0,"west":99.8,"south":26.5,"north":26.7,"scale":null,"crs":null,"filesize":0.514,"share_policy":"a","ts_created":"2021-10-26T15:32:06.825264+08:00","doi_type":"拥有自主知识产权","ts_updated":"2022-02-07T16:07:50.982060+08:00","time_description":"始新世","datas_group":3,"time_description_en":"Eocene","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"赵磊","username":"赵秦","email":"137qinruihong@163.com","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":"100m - 1km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[6],"subtopics":{"metadata":"d8145d13-5e31-41fd-a9db-922183ad1a9b","three_pole":null,"third_pole":"XDA20070201"},"username":"XDA20070201","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":19}