{"id":"5a05f474-d8f3-4db0-8277-ff8b1e3ac7a9","title":"德明顶全岩主微量、锶-钕同位素测试分析、锆石U-Pb","title_en":"Geochemistry and zircon trace elements composition of the Miocene ore‐bearing biotite monzogranite porphyry in the Demingding porphyry Cu‐Mo deposit, Tibet: Petrogenesis and implication for magma fertility","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":"数据文件名称为Data，直接数据，可以使用。","description":"德明顶是一个研究较少的后碰撞斑岩型铜-钼矿床，位于冈底斯斑岩铜矿带东部。本文提供了德明顶黑云母斑岩的LA-ICP-MS锆石U-Pb定年、全岩地球化学和锆石微量元素数据。锆石U-Pb测年结果表明，中新世黑云母斑岩的加权平均206 Pb/238 U年龄为20.36±0.46Ma（MSWD=2.6，n=21）。中新世黑云母斑岩具有较高的SiO_2、K_2O和Al_2O_3含量，并表现出类似埃达克岩的特征。这些岩石具有较高的Sr/Y比值，低HREE丰度的分馏REE模式，与HfSE相比在LILE中富集，（87 Sr/86 Sr）I值为0.7059~0.7062，εNd（T）值为−2.35~−1.67，（-206 Pb/204 Pb）I值为18.50~18.55。这些特征与冈底斯带的其他中新世阿达克岩状侵入岩相似。我们认为黑云母斑岩与东部冈底斯带其它中新世含矿岩类侵入岩具有相同的岩石成因，其成因来源于俯冲改造、变质变质的西藏下地壳的重熔和交代西藏地幔的水化镁铁质岩浆的混合。黑云母斑岩中的锆石只有极小的负Eu异常(Eun/Eun*>0.3)，具有较大的Ce~(4+)/Ce~(3+)比值(平均值113)、10,000~*(Eun/Eun*)/Y(3.94~8.14>1)、Ce/Nd(9-58，平均值30)、(Ce/Nd)/Y(0.008~0.127>0.003)、Dy/Yb(0.15-0.24，<1)；0.3)，表明黑云母斑岩具有相对的水化和氧化作用。因此，黑云母斑岩被认为是一种相对富集的侵入体，具有一定的勘探潜力。数据来源：委托中国地质科学院矿产资源研究所、中国地质大学（北京）地质过程与矿产资源国家重点实验室完成。数据结果良好。","doi":"10.11888/SolidEar.tpdc.272054","projection":"","language":"zh","share_type":"online","east":92.65,"west":92.58,"south":29.58,"north":29.65,"scale":null,"crs":null,"filesize":0.2,"share_policy":"a","ts_created":"2022-02-18T20:18:19.792677+08:00","doi_type":"拥有自主知识产权","ts_updated":"2022-03-01T16:29:17.081501+08:00","time_description":"","datas_group":3,"time_description_en":"","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":"--","spatial_resolution":"--","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[801],"subtopics":{"metadata":"5a05f474-d8f3-4db0-8277-ff8b1e3ac7a9","three_pole":null,"third_pole":null},"username":"王立强","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":78}