{"id":"8c5df6f8-fbd1-4417-8c59-04b766dfc3ec","title":"北秦岭地体晚侏罗世-早白垩世蟒岭和牧护关花岗岩体锆石年龄和地球化学组成数据","title_en":"Zircon age and geochemical composition of the mangling and Muhuguan granites from the late Jurassic to early Cretaceous of the North Qinling terrane","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":"姓名 + 年份，Excel","description":"LA-ICP-MS锆石定年、XRF和ICP-MS方法的全岩地球化学组成、TIMS方法获得的Sr-Nd-Pb同位素组成显示：侵位于北秦岭地体北缘的牧护关和蟒岭两个岩体中的二长花岗岩具有高的SiO2含量（69.3–77.0 wt.%），低Mg#值（0.21–0.38），富集LREE，Th，U和Pb元素，亏损HFSE，且存在Eu的负异常。根据蟒岭岩体二长花岗岩具有较高的Sr/Y、(Dy/Yb)N和(La/Yb)N比值，较低的SiO2含量和不明显的Eu的负异常，所以推测蟒岭岩体二长花岗岩的来源比牧护关岩体二长花岗岩更深。Sr-Nd同位素特征表明，牧护关和蟒岭岩体花岗岩具有相似的岩浆来源，且均来源于不均一的岩浆源区。锆石U-Pb定年结果可以分为两类：（1）岩浆锆石（153-140 Ma）；（2）继承锆石可以分为五个群组，分别为新太古代-古元古代、古元古代-中元古代、新元古代，古生代，晚古生代-早中生代。牧护关和蟒岭岩体花岗岩的地球化学特征显示，它们来源于北秦岭新元古代新生下地壳与古老的基底物质的混合。牧护关和蟒岭岩体较低的放射性成因Pb同位素组成也支持了华北南缘基底物质的参与。数据来源于科研项目“国家重点研发计划“燕山期重大地质事件的深部过程与资源效应”（2016YFC0600404)。","doi":"doi.org/10.1016/j.lithos.2019.04.008","projection":"","language":"zh","share_type":"online","east":110.5,"west":109.1,"south":33.8,"north":34.2,"scale":null,"crs":null,"filesize":10.2,"share_policy":"a","ts_created":"2021-05-28T08:24:57.640089+08:00","doi_type":"国际公开共享数据","ts_updated":"2021-06-03T10:23:02.246496+08:00","time_description":"150 Ma之后","datas_group":3,"time_description_en":"Since 150 Ma","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"杨晓勇","username":"杨晓勇","email":"xyyang@ustc.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":"1km - 10km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[537],"subtopics":{"metadata":"8c5df6f8-fbd1-4417-8c59-04b766dfc3ec","three_pole":null,"third_pole":null},"username":"陈福坤","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":384}