{"id":"717e14d4-b3c2-47a5-8513-03a1acca158a","title":"藏南拉萨正嘎始新世花岗岩地球化学数据集","title_en":"Geochemical data set of the Zhengga Eocene granite in Lhasa, southern 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":"马林. 藏南冈底斯造山带I型高分异成因淡色花岗岩及其印亚同碰撞深部过程的指示意义. \n使用本数据时必须引用“文章的引用”中列出的文献，并进行数据的引用。","description":"本数据集来源于论文：Ma, L.*, Wang, Q.*, Kerr, A.C., Yang, J.H., Xia, X.P., Ou, Q., Yang, Z.Y., Sun, P., 2017. Paleocene (ca. 62 Ma) leucogranites in southern Lhasa, Tibet: products of syn-collisional crustal anatexis during slab roll-back? Journal of Petrology, 58(11): 2089-2114. 本研究成果受到国家重点研发计划“深地资源勘查开采”专项“燕山期重大地质事件的深部过程与资源效应”（2016YFC0600400）资助。该项成果是马林副研究员、王强研究员及团队在青藏高原开展岩石学与深部动力学研究成果的一部分。该团队应用岩石学和地球化学方法，重建了喜马拉雅-青藏高原造山带南缘碰撞演化历史。申请人在冈底斯厘定出古新世（63-58 Ma）石榴石二云母花岗岩和黑云母花岗岩组合。研究发现两类岩石具有一致的Sr-Nd-Hf-O同位素组成，但主量元素呈现随硅铝组成增加、镁铁组分下降的特点，同时发现相似的矿物成分演化，包括镁黑云母向铁质黑云母的转变，中长石-培长石-奥长石-钠长石的连续成分演化、石榴石核部向边部锰铝榴石组成递增等，揭示了石榴石二云母花岗岩是新生下地壳熔体经过高度分异演化的产物，为I型淡色花岗岩的高分异成因提供了岩石学证据。研究还揭示冈底斯同碰撞深熔作用与印-亚大陆的穿时碰撞相关，大陆碰撞与大洋俯冲的相互作用模型也为理解全球大型汇聚造山带中出现的地壳和岩石圈的异常热现象提供了借鉴和启示。数据来自该论文附件。数据集包括：1 主要氧化物和微量元素数据；2 全岩Sr-Nd同位素数据；3 SIMS锆石U-Pb定年数据；4 LA-ICP-MS锆石U-Pb定年数据；5 锆石Hf-O同位素数据。","doi":"10.11888/Geo.tpdc.271346","projection":"","language":"zh","share_type":"online","east":92.2,"west":92.15,"south":29.25,"north":29.3,"scale":null,"crs":null,"filesize":0.039,"share_policy":"a","ts_created":"2021-05-25T23:39:25.681227+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-06-04T16:23:30.486063+08:00","time_description":"63-58百万年前","datas_group":3,"time_description_en":"63-58 million years ago","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"王浩","username":"王浩_iggcas","email":"wanghao@mail.iggcas.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":"1km - 10km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[521],"subtopics":{"metadata":"717e14d4-b3c2-47a5-8513-03a1acca158a","three_pole":null,"third_pole":null},"username":"王军","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":511}