{"id":"62d767a6-403b-4a96-afec-afa94f1024c5","title":"羌塘盆地中生代的沉降和折返作用及其对青藏高原生长的意义","title_en":"Subsidence and exhumation of the Mesozoic Qiangtang Basin: implications for the growth of the Tibetan Plateau","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pdf及Word格式存储，文件名称为CT开头，代表西藏中部地区。具体样品编号、实验方法、具体数据等见pdf及Word。","description":"羌塘盆地的沉降史和折返史以及它们对青藏高原早期演化的贡献引起了激烈的争论。作者选取11个复合地层剖面重建了羌塘盆地中生代的沉降史，并利用磷灰石裂变径迹资料对第一阶段冷却进行了约束。综合相分析、生物地层学、古环境解释和古水深估算，建立了11个贯穿盆地的复合剖面。回溯沉降计算结合前人对沉积物源和变形时间的研究，表明中生代羌塘盆地的演化可分为两个阶段。晚三叠世至早侏罗世，北羌塘为后前陆盆地。南羌塘为碰撞前陆盆地。中侏罗世至早白垩世，来自金沙江缝合带的冲断带负荷推动了后前陆复合盆地的发育。碎屑磷灰石裂变径迹年龄主要集中在早白垩世晚期(120.9~84.1 Ma)和古近纪-始新世(65.4~40.1 Ma)。热历史模拟结果记录了早白垩世的快速降温，中生代羌塘盆地沉降的终止和折返的开始，表明西藏中部地壳增厚的积累可能始于晚侏罗世-早侏罗世(150-130 Ma)，包括拉萨地体和松潘-甘孜地体在羌塘地体之下的俯冲，或安多地体的碰撞。(2)西藏中部地壳增厚的积累可能始于晚侏罗世-早侏罗世(150-130 Ma)，包括拉萨地体和松潘-甘孜地体在羌塘地体之下的俯冲或安多地体的碰撞。","doi":"10.1111/bre.12343","projection":"","language":"zh","share_type":"online","east":92.0,"west":88.0,"south":32.0,"north":34.0,"scale":null,"crs":null,"filesize":0.8,"share_policy":"a","ts_created":"2021-05-29T11:23:55.994195+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-06-03T11:18:34.230042+08:00","time_description":"120百万年来","datas_group":3,"time_description_en":"120 million years","data_format":null,"project":[11],"specials":["b6500306-f60b-4aa1-b0b6-0324d94866df"],"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":21056,"last_login":"2022-02-09T12:02:24.544987+08:00","username":"huxiaoli","email":"huxiaoli@lzb.ac.cn","is_active":true,"is_staff":true,"user_name":"胡晓利"},"data_sources":null,"temporal_resolution":"1000 year < x","spatial_resolution":"10km - 100km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[21],"subtopics":{"metadata":"62d767a6-403b-4a96-afec-afa94f1024c5","three_pole":null,"third_pole":null},"username":"韩中鹏","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":719}