扬子地台东南缘武陵凹陷区新生代以来的隆升剥蚀过程——来自碎屑岩磷灰石裂变径迹的证据  

Uplifting and erosion process of Wuling Concave Field,Southeast margin Yangtze Platform since Cenozoic—evidence of fission track of clastic apatite

作　　者：叶飞[1,2] 舒多友 潘文[1,2,3] 左勇 蒋天锐[1] 周宁 覃智贵 孟锟鹏[4] 何毅 YE Fei;SHU Duoyou;PAN Wen;ZUO Yong;JIANG Tianrui;ZHOU Ning;QIN Zhigui;MENG Kunpeng;HE Yi(Geological Party 103Guizhou Bureau of Geologoy and Minerals,Tongren 554300,Guizhou,China;Science and Technology Innovation Party of Prediction and Evaluation of Manganese Resources inGuizhou Province,Tongren 554300,Guizhou,China;China University of Geosciences,Wuhan 430074,Hubei,China;Guizhou Sanxi New Engergy Technology Co.,Ltd.,Liupanshui 553001,Guizhou,China)

机构地区：[1]贵州省地矿局一○三地质大队,贵州铜仁554300 [2]贵州省锰矿资源预测评价科技创新人才团队,贵州铜仁554300 [3]中国地质大学(武汉),湖北武汉430074 [4]贵州三稀新能源科技股份有限公司,贵州六盘水553001

出　　处：《地质通报》2022年第12期2158-2166,共9页Geological Bulletin of China

基　　金：贵州省地矿局项目《贵州“梵净山”地貌特征成因分析》(编号:黔地矿科合[2018]06号);《湘西-黔东北地区铅锌矿床成矿机制研究》(编号:黔地矿科合[201502号];《黔东北若干超大型锰矿床三维地质建模与数据挖掘》(编号:黔地矿科合[2017]2号);贵州省科技支撑项目《贵州省深部锰矿地球物理精细探测新技术研发》(编号:黔科合支撑[2019]2868);《锰矿勘查与开发大数据管理与智能处理系统研发应用》(编号:黔科技支撑[2017]2951)

摘　　要：为揭示扬子板块东南缘新生代以来的热隆升历史,选取扬子地台东南缘武陵凹陷区为研究区,开展磷灰石裂变径迹测年和热演化史模拟,揭示扬子地台东南缘武陵凹陷区古近纪以来的构造-热演化过程。测年结果显示,武陵凹陷区自晚中生代以来经历了晚三叠世—白垩纪的坳陷沉降和白垩纪末期以后的持续隆升剥蚀2个构造发展演化阶段。定量分析结果显示,研究区新生代以来的隆升可分为2期:Ⅰ期自约80 Ma开始,该隆升事件的启动应与四川运动有关;Ⅱ期自约28 Ma开始,该时期持续的隆升与印度板块和欧亚板块在雅鲁藏布江带的碰撞有关。扬子地台东南缘武陵凹陷区的磷灰石裂变径迹数据,揭示了武陵凹陷区的构造-热演化过程,弥补了该区热年代学研究的不足,对揭示武陵凹陷区乃至整个中上扬子中—新生代的构造热演化过程具有重要意义。In order to reveal the thermal uplifting history of Southeast margin Yangtze Block since Cenozoic Era,in this paper,it selects Wuling Concave Field of Southeast margin Yangtze Platform as the study area,performs the dating of clastic apatite fission track and imitate the thermal evolution,and reveals the tectonic-thermal evolution of Wuling Concave Field at Southeast margin of Yangtze platform since Paleogene.The results show that the study area experienced two evolution stages.By the quantitative analysis,it can be known that uplifting at the study area since cretaceous period can be divided into two periods,PeriodⅠstarted from 80 Ma in which the start of uplifting linked with Sichuan Movement,PeriodⅡstarted from about 28 Ma in which the continuous uplifting linked with the impact between India Plate and Eurasian Plate at the Yarlung Zangbo River.For the first time,this research got the fission track data of clastic apatite in Wuling Concave Field of Southeast margin of Yangtze Platform,which revealed the tectonic-thermal evolution at Wuling Concave Field and covered the shortage of thermochronology in the study area.Actually,this research plays a significant role in revealing the tectonic-thermal evolution of Wuling Concave Field,even middle and upper Yangtze Region at Mesozoic and Cenozoic.

关 键 词：扬子板块东南缘 隆升剥蚀 磷灰石 裂变径迹 新生代 

分 类 号：P534.53[天文地球—古生物学与地层学] P619.213[天文地球—地质学]