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松辽盆地新生代构造演化对砂岩型铀矿成矿的控制作用——来自磷灰石裂变径迹的证据
投稿时间:2019-11-25  修订日期:2020-02-29  点此下载全文
引用本文:
DOI:10.19762/j.cnki.dizhixuebao.2020061
摘要点击次数: 116
全文下载次数: 94
作者单位E-mail
吏成辉 中国地质调查局天津地质调查中心 zg_lichenghui@126.com 
程银行 中国地质调查局天津地质调查中心 weicheng1858@163.com 
王铁军 中钢集团天津地质研究院有限公司  
王少轶 中国地质调查局天津地质调查中心  
张天福 中国地质调查局天津地质调查中心  
程先钰 中国地质调查局天津地质调查中心  
张夏炜 中国地质调查局天津地质调查中心  
李艳峰 中国地质调查局天津地质调查中心  
基金项目:中国地质调查项目(DD20190813)、国家重点研发计划(2018YFC0604200)、国际地球科学计划(IGCP675)和国家重点基础研究发展计划(973计划,项目编号:2015CB453000)联合资助。
中文摘要:本文针对松辽盆地北部隆起区的4个钻孔13件样品系统展开了磷灰石裂变径迹测试,揭示了松辽盆地新生代构造演化对砂岩型铀矿床的限制作用。13件磷灰石裂变径迹测试结果表明,松辽盆地北部晚白垩世以来的构造演化过程主要经历了3期快速隆升事件:①晚白垩世—始新世(71~48 Ma),期间以8~56 m/Ma的平均速率隆升,盆地北部整体呈抬升状态;②早渐新世—中新世(36~18 Ma),期间以24~49 m/Ma的平均速率隆升,盆地北部呈差异性抬升过程, 第二期抬升事件隆升强度和持续时间较第一期抬升事件略低;?中新世-至今(18~0 Ma),期间以2~19m/Ma的平均速率隆升,盆地北部缓慢抬升,构造活动较弱,三期构造抬升事件与滨太平洋板块俯冲速率和方向转向密切相关。结合前人低温热年代学数据,针对南部地区钱家店铀矿床成矿年代学成果研究发现,新生代以来的构造抬升事件伴生其后均成藏有砂岩型铀矿,砂岩型铀成矿与新生代构造密切相关,尤其与中新世末次隆升构造紧密相关,成矿过程延续至今。
中文关键词:松辽盆地  磷灰石裂变径迹  砂岩型铀矿  新生代构造演化  太平洋板块
 
The Controlling Effect of Cenozoic Tectonic Evolution on the Mineralization of Sandstone-Type Uranium Deposits in the Songliao Basin——Evidence from Apatite Fission Track
Author NameAffiliationE-mail
LI Chenghui Tianjin Center, China Geological Survey zg_lichenghui@126.com 
CHENG Yinhang Tianjin Center, China Geological Survey weicheng1858@163.com 
WANG Tiejun Sinosteel Tianjin Geological Research Institute  
WANG Shaoyi Tianjin Center, China Geological Survey  
ZHANG Tianfu Tianjin Center, China Geological Survey  
CHENG Xianyu Tianjin Center, China Geological Survey  
ZHANG Xiawei Tianjin Center, China Geological Survey  
LI Yanfeng Tianjin Center, China Geological Survey  
Abstract:This paper makes a systematic study for 13 samples from 4 boreholes in the uplift area of the northern Songliao Basin by conducting apatite fission track tests.The study shows that Cenozoic tectonic evolution of Songliao Basin has a controlling effect on sandstone-type uranium deposit. According to the thirteen AFT tests, the northern area of Songliao Basin has undergone three major rapid tectonic uplifts since late Cretaceous: 1) From late Cretaceous to Eocene(71~48 Ma), the whole northern basin experienced a major uplift at an average rate of 8~56 m/Ma; 2) From Early Oligocene to Miocene(36~18 Ma), the northern basin underwent a differential uplift at an average rate of 24~49 m/Ma, The second uplift showed slightly lower intensity and shorter duration than the first one;3)Scince Miocene(18~0 Ma),there has been a weak tectonic and a slow uplift at an average of 2~19 m/Ma The three tectonic uplifts were closely related to the subduction rate and moving direction of the Margnal Pacific plate. Based on the data from previous low temperature thermal chronology study as well as the research on the metallochronology of Qianjiadian sandstone-hosted uranium deposit in south basin, the tectonic uplifting since Cenozoic were accompanied by subsequent formation of sandstone-type uranium deposits, which means that sandstone-type uranium mineralization is closely related to Cenozoic tectonic evolution, particularly the tectonic uplift in the late Miocene, and the mineralization process continues to the present.
keywords:Songliao Basin  apatite fission track  sandstone-type uranium deposit  Cenozoic tectonic evolution  pacific plate
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