【作者】 沈传波； 梅廉夫； 刘昭茜； 吴敏；

【Author】 SHEN Chuan-bo~(1,2),MEI Lian-fu~(1,2),LIU Zhao-qian~1,WU Min~2 (1.Key Laboratory of Tectonics and Petroleum Resources,China University of Geosciences.Ministry of Education.Wuhan, 430074,China;2.Faculty of Earth Resources.China University of Geosciences,Wuhan.430074.China)

【机构】 中国地质大学构造与油气资源教育部重点实验室； 中国地质大学资源学院；

【摘要】 通过单颗粒锆石LA-ICP-MS U-Pb定年和磷灰石裂变径迹年龄以及时间一温度热演化历史的反演研究了华容岩体的侵位时代和隆升作用过程。研究结果表明,小墨山岩体形成于121.8±2.5Ma,桃花山岩体形成于130.1±1.0Ma,均形成于燕山晚期早白垩世的伸展构造背景。岩体侵入定位形成之后即开始了隆升剥蚀,其隆升过程可划分为四个阶段。白垩纪129～82Ma发生的快速隆升剥露作用,可能反映了中国东部自中生代挤压构造环境向新生代伸展构造环境的转换、江汉盆地的快速裂陷作用。更多还原

【Abstract】 Based on single zircon LA-ICP-MS U-Pb dating and fission-track dating evidences from Huarong granite samples and modeled time-temp(?)re thermal history,the emplacement ages and Meso-Cenozoic uplifting process of Huarong granites has(?) quantitatively studied.Using the method of single zircon LA-ICP-MS U-Pb dating,the emplacement ages of 121.8±2.5Ma andl30.1±1.0Ma were yielded for Xiaomoshan pluton and Taohuashan pluton.They formed in the extensional geological setting of East China.The results of fission track dating and modeled time-temperature thermal history indicate that the uplifting process of Huarong granites since their emplacement can be divided into four stages and show continuous uplifting and cooling.The 129-82Ma rapid uplifting process is related to the tectonic transition from the compressional environment to extensional environment.At the same time,Jianghan basin was underwent the rapid extensional tectonic activity.更多还原