{"id":"75ff81f3-2322-4974-8c5d-7224757744bc","title":"边界驱动对流与克拉通岩石圈减薄数值模拟图件","title_en":"Numerical simulation of boundary driven convection and lithospheric thinning in Craton","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":"数据以jpg形式储存，无文件命名方式。使用方法：将数据通过有图片编辑器功能软件打开即可。","description":"内容包括：古老克拉通与相邻的年轻活动带之间通常存在着岩石圈厚度的突变，二者之间温度和密度的横向差异能引发小尺度地幔对流（边界驱动对流）。利用二维热-力学数值模拟方法探讨克拉通与活动带之间的岩石圈台阶引发的边界对流及其在克拉通岩石圈减薄中的作用。主要结论及启示：在同等初始条件下，边界对流对克拉通的改造作用取决于克拉通岩石圈自身的性质及其与周缘物质的物性差异。当克拉通岩石圈密度相对较大时，高强度的克拉通岩石圈抵御边界驱动对流的能力强，克拉通岩石圈减薄仅局限于边缘，而低强度的克拉通岩石圈抵御边界驱动对流的能力弱，克拉通岩石圈在下降流的作用下被逐渐侵蚀，从而造成了克拉通岩石圈的大规模减薄。当克拉通岩石圈的密度相对较小时，无论克拉通岩石圈的强度高低，低密度的克拉通岩石圈都很好的抑制了边界驱动对流的影响，上升流驱使克拉通岩石圈边缘流向活动带岩石圈的底部，岩石圈减薄仅发生在边缘。太古代的华北克拉通被显生宙的活动带所围限，其岩石圈减薄最早发生在北缘和东缘，且经历了一个缓慢的过程，我们认为边界驱动对流可能在华北克拉通岩石圈减薄过程中发挥了重要作用，尤其是在岩石圈减薄的启动过程中，但不排除其他多元机制的共同作用。","doi":"10.11888/Geo.tpdc.271521","projection":"","language":"zh","share_type":"online","east":180.0,"west":-180.0,"south":-90.0,"north":90.0,"scale":null,"crs":null,"filesize":1.64,"share_policy":"a","ts_created":"2021-06-16T16:01:24.742293+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-09-22T09:24:16.029380+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":"张衡","username":"张衡","email":"zhangheng415@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":"1000 year < x","spatial_resolution":"-","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[521],"subtopics":{"metadata":"75ff81f3-2322-4974-8c5d-7224757744bc","three_pole":null,"third_pole":null},"username":"唐嘉萱","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":400}