{"id":"38b7b4da-97cb-4917-b0da-ffd977fc7903","title":"华南地块牛塘界地区矽卡岩钨矿化时代与花岗岩组合","title_en":"Age and granite association of skarn W mineralization at Niutangjie district, South China Block","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":"2018011.xlsx，代表发表于2018年11月有关华南地块牛塘界地区矽卡岩钨矿化时代与花岗岩组合。","description":"华南地块发育大量钨锡矿床，主要与燕山期(侏罗纪-白垩纪)花岗岩有关；在广西(中古生代)花岗岩中发现了少量矿床，其中最大的是牛塘界矽卡岩钨矿床。牛塘界矿床在空间上与两套花岗岩相关联：未矿化的越城岭黑云母和二云母花岗岩的锆石U-Pb年龄分别为427.1 +/- 2.9 Ma和427.5 +/- 3.5 Ma，矿化的牛塘界白云母花岗岩的锆石U-Pb年龄较年轻，为421.0 +/- 1.5 Ma。牛塘界白云母花岗岩中锡石与白钨矿共生的U-Pb年龄为420.8 +/- 8.0 Ma，与主岩年龄一致。\n未矿化的越城岭黑云母花岗岩A/CNK值为0.97 ~ 1.16，同时具有I型和S型花岗岩特征。与未矿化的越城岭黑云母花岗岩相比，已矿化的牛塘界白云母花岗岩为S型花岗岩，A/CNK值为1.12 ~ 1.72,SiO2含量和Rb/Sr值较高，Nb/Ta、Zr/Hf、K/Rb值较低。地球化学差异和锆石Hf同位素组成表明，相对分馏的牛塘界白云母花岗岩是由元古代变质沉积物部分熔融形成的。越城岭黑云母花岗岩为元古代变质沉积岩与次级变质火成岩的部分熔融。越城岭未矿化的二云母花岗岩与已矿化的牛塘界白云母花岗岩具有相似的地球化学特征，但体积相对较小，找矿较少，这可能是越城岭二云母花岗岩至今未发现矿化的原因。与古生代广西花岗岩相比，中生代燕山期花岗岩体积更大、分馏程度更高，可能是其W-Sn矿化丰度更高的原因。","doi":"","projection":"","language":"zh","share_type":"online","east":110.35,"west":110.34,"south":25.49,"north":25.5,"scale":null,"crs":null,"filesize":0.15,"share_policy":"a","ts_created":"2021-05-22T19:04:49.409350+08:00","doi_type":"国际公开共享数据","ts_updated":"2021-05-25T21:23:31.907328+08:00","time_description":"427百万年来","datas_group":3,"time_description_en":"427 million years","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"颜茂都","username":"颜茂都","email":"maoduyan@itpcas.ac.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":"1km - 10km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[522],"subtopics":{"metadata":"38b7b4da-97cb-4917-b0da-ffd977fc7903","three_pole":null,"third_pole":null},"username":"黄文婷","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":261}