{"id":"a9e93ed8-91b3-4b0d-ad50-7057842b73da","title":"中国东部玄武岩的Cr同位素研究（<110 Ma）","title_en":"Chromium isotope investigation of < 110 Ma basalts in eastern China","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":"表1：中国东部<110 Ma板内玄武岩的Cr同位素组成。","description":"我们对中国东部73件<110 Ma板内玄武岩进行了双稀释剂法+TIMS/MC-ICP-MS进行全岩Cr同位素组成分析，这些玄武岩的Cr同位素显示出较大的同位素组成差异，总体变化为-0.292±0.02‰到0±0.03‰，远大于地幔的组成范围。结合分离结晶模型，我们论证了它们的Cr-Mg同位素组成的变化并不可能是铬铁矿/尖晶石结晶的结果，我们认为导致这些玄武岩Cr同位素组成变化的因为主要是由于俯冲古太平洋物质所导致的局部地幔发生了氧化，形成了高氧逸度的地幔，从而形成了Cr同位素局部不均一的地幔源区。该数据对理解板块俯冲过程导致的深部氧循环过程有着重要意义。","doi":"10.11888/Geo.tpdc.271555","projection":"","language":"zh","share_type":"protected","east":130.0,"west":115.0,"south":24.0,"north":49.0,"scale":null,"crs":null,"filesize":0.013,"share_policy":"c","ts_created":"2021-05-30T18:12:42.444588+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-06-28T09:10:08.781775+08:00","time_description":"","datas_group":0,"time_description_en":"","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"平先权","username":"平先权","email":"xqping@cug.edu.cn","is_cancel_expert":true}],"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":"100km - 1000km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[521],"subtopics":{"metadata":"a9e93ed8-91b3-4b0d-ad50-7057842b73da","three_pole":null,"third_pole":null},"username":"沈骥","review_time":null,"protected_duration":12,"protected_describe":"数据尚未发表","is_important":false,"hit_count":380}