{"id":"5154b662-f517-4c5a-9563-09e8652587c0","title":"古地磁数据对中生代羌塘地块和特提斯洋演化的限定","title_en":"Paleomagnetic data bearing on the Mesozoic deformation of the Qiangtang Block: Implications for the evolution of the Paleo- and Meso-Tethys","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":"中生代羌塘和特提斯洋演化的相关古地磁、地层和火山岩、变质岩证据","description":"古地磁学在认识\"原青藏高原\"中生代演化中起着重要的作用。我们在这里展示了来自北羌塘东部东部雁石坪地区中上侏罗统五个沉积序列的最新古磁数据（ 共99个采点，1,702个样品），揭示雀莫错组的古磁极为79.1°N/306.9°E (dp=3.9°, dm=6.3°) 、布曲组为68.9°N/313.8°E (dp=2.1°, dm=3.7°)、夏里组为66.1°N/332.1°E (dp=2.7°, dm=4.6°)、索瓦组为72.4°N/318.6°E (dp=3.9°, dm=6.7°)和雪山组为76.9°N/301.1°E (dp=7.9°, dm=13.2°)；这些结果表明，雁石坪在171.2-<157.5 Ma期间位于北纬〜24.5°-〜22.0º，伴随着〜171.2-161.7 Ma间〜19.8±9.4º逆时针旋转在〜161.7和<157.2 Ma之间〜15.4±13.4º顺时针旋转。这个旋转变形的调整可能指示拉萨和羌塘地块在~161Ma剪刀式碰撞引起的。结合拉萨、羌塘和塔里木地块其他已有古地磁数据，以及诸如构造相关的沉积序列，火山作用和HP变质作用等其他地质证据，我们提出了包括南-北羌塘地块、羌塘-松潘甘孜地块和拉萨羌塘地块3次陆陆碰撞和碰后拉张环境在内的中生代羌塘和特提斯洋新的演化模型。","doi":"http://dx.doi.org/10.1016/j.gr.2016.01.012","projection":"","language":"zh","share_type":"online","east":100.0,"west":75.0,"south":30.0,"north":36.0,"scale":1,"crs":null,"filesize":3.0,"share_policy":"a","ts_created":"2019-12-28T08:45:18.406408+08:00","doi_type":null,"ts_updated":"2021-04-19T21:57:01.436008+08:00","time_description":"2.5-1.5亿年","datas_group":3,"time_description_en":"250-150 Ma","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"聂军胜","username":"聂军胜","email":"jnie@lzu.edu.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":"100km - 1000km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"5154b662-f517-4c5a-9563-09e8652587c0","three_pole":null,"third_pole":null},"username":"颜茂都","review_time":"2019-12-28T14:38:48.235984+08:00","protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":1641}