| 江西南部版石盆地火山岩SHRIMP锆石U-Pb年龄及其地质意义 |
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| 引用本文： | 王保峰,巫建华.江西南部版石盆地火山岩SHRIMP锆石U-Pb年龄及其地质意义[J].东华理工大学学报（自然科学版）,2011(1):18-24. |
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| 作者姓名： | 王保峰 巫建华 |
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| 作者单位： | 东华理工大学地球科学学院 |
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| 基金项目： | 中国核工业地质项目“中国中新生代铀成矿作用”(2008-69) |
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| 摘 要： | 应用SHRIMP锆石U-Pb定年方法,对江西南部三南-寻乌火山岩带版石盆地原鸡笼嶂组凝灰岩和原版石组流纹岩开展年代学研究.结果表明,凝灰岩SHRIMP锆石U-Pb年龄为(142.5±1.3)Ma,流纹岩SHRIMP锆石U-Pb年龄为(131.4±1.3)Ma.根据新的国际地层表,晚侏罗世与早白垩世的界线划在(145.5...
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| 关 键 词： | 长英质火山岩 SHRIMP锆石U-Pb年龄 地层划分 早白垩世早期 江西版石 |
SHRIMP Zircon U-Pb Age and its Significances of Volcanic Rocks from Banshi Basin in South Jiangxi Province |
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| WANG Bao-feng,WU Jian-hua.SHRIMP Zircon U-Pb Age and its Significances of Volcanic Rocks from Banshi Basin in South Jiangxi Province[J].Journal of East China Institute of Technology(Natural Science Edition),2011(1):18-24. |
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| Authors: | WANG Bao-feng WU Jian-hua |
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| Affiliation: | (Faculty of Earth Sciences,East China Institute of Technology,Fuzhou,JX 344000,China) |
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| Abstract: | SHRIMP zircon U-Pb dating is applied to geochronological study for tuff of original Jilongzhang formation and rhyolite of original Banshi formation in Banshi basin,located in the Sannan(Longnan,Dingnan,Quannan)-Xunwu volcanic rocks belts in the south of Jiangxi.The result shows that zircon SHRIMP U-Pb age of the tuff is(142.5±1.3) Ma and the age of the rhyolite is(131.4±1.3) Ma.According to the latest international stratigraphic chart,the boundary between Jurassic and Cretaceous is(145.4±4.0)Ma.So original Jilongzhang Formation and original Banshi Formation in Banshi basin were formed during early Early Cretaceous.The volcanic series in Banshi basin belongs to only one volcanic cycle.The features of the rock associations consistent with Wuyi group on the Xiajiang-Guangfeng volcanic rocks belts in the north of Jiangxi,so original Jilongzhang formation falls under E’huling formation and original Banshi formation falls under Shixi formation. |
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| Keywords: | felsic volcanic rocks SHRIMP zircon U-Pb age stratigraphic division early Early Cretaceous Banshi in Jiangxi |
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