| 浙江庆元地区早——中侏罗世火山岩LA-ICP-MS锆石U-Pb年龄及其地质特征 |
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| 引用本文： | 邢新龙,邢光福,陈世忠,赵希林,段政.浙江庆元地区早——中侏罗世火山岩LA-ICP-MS锆石U-Pb年龄及其地质特征[J].地质通报,2017,36(9):1583-1590. |
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| 作者姓名： | 邢新龙 邢光福 陈世忠 赵希林 段政 |
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| 作者单位： | 1. 江西省地矿资源勘查开发中心, 江西 南昌 330030;2. 中国地质调查局南京地质调查中心, 江苏 南京 210016 |
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| 基金项目： | 中国地质调查局项目《浙江庆元—福建政和地区铜多金属矿攻关示范》（编号：12120114002601）和《武夷山关键地区区域地质调查》（编号：12120113070800） |
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| 摘 要： | 在浙江庆元大面积白垩纪火山岩分布区,首次发现层位可归入毛弄组的早—中侏罗世火山岩,用LA-ICP-MS技术测得其中流纹英安岩和流纹质弱熔结凝灰岩中的锆石U-Pb年龄分别为176.0±1.2Ma和169.1±3.3Ma。结合闽北地区发现的中侏罗世火山岩,推断东南沿海地区在早—中侏罗世时已开始进入古太平洋板块俯冲的构造体制。
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| 关 键 词： | 早-中侏罗世 LA-ICP-MS锆石U-Pb年龄 火山岩 浙南庆元地区 |
| 修稿时间： | 2017/2/8 0:00:00 |
LA-ICP-MS zircons U-Pb ages and geological characteristics of EarlyMiddle Jurassic volcanic rocks in the Qingyuan area, Zhejiang Province |
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| XING Xinlong,XING Guangfu,CHEN Shizhong,ZHAO Xilin and DUAN Zheng.LA-ICP-MS zircons U-Pb ages and geological characteristics of EarlyMiddle Jurassic volcanic rocks in the Qingyuan area, Zhejiang Province[J].Geologcal Bulletin OF China,2017,36(9):1583-1590. |
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| Authors: | XING Xinlong XING Guangfu CHEN Shizhong ZHAO Xilin and DUAN Zheng |
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| Institution: | 1. Center of Exploration and Development of Geology and Mineral Resources of Jiangxi Province, Nanchang 330030, Jiangxi, China;2. Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China |
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| Abstract: | The Early-Middle Jurassic volcanic rocks were discovered for the first time in Qingyuan area of southern Zhejiang Prov-ince, where the Cretaceous volcanism was intense. They consist of rhyodacite and rhyolitic ignimbrite and can be assigned to Ma-onong Formation. Their LA-ICP-MS zircon U-Pb ages are 176.5±0.7Ma and 169.1±3.3Ma respectively. Combined with Middle Jurassic volcanic rocks in northern Fujian Province, it is inferred that southeast coastal areas began to enter the paleo-Pacific plate sub-duction system in Early-Middle Jurassic. |
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| Keywords: | Early-Middle Jurassic LA-ICP-MS zircon U-Pb dating volcanic rock Qingyuan area |
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