| 浙江浦江县蒙山地区陈塘坞组在地层柱中的位置
——来自SHRIMP锆石U-Pb年龄的制约 |
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| 引用本文： | 高林志,丁孝忠,刘燕学,黄志忠,张传恒,许兴苗,邬祥林,宋志瑞,张 恒.浙江浦江县蒙山地区陈塘坞组在地层柱中的位置
——来自SHRIMP锆石U-Pb年龄的制约[J].地质通报,2013,32(7):988-995. |
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| 作者姓名： | 高林志 丁孝忠 刘燕学 黄志忠 张传恒 许兴苗 邬祥林 宋志瑞 张 恒 |
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| 作者单位： | 1.中国地质科学院地质研究所, 北京 100037; 2.中国地质调查局南京地质调查中心,江苏 南京 210016;
3.中国地质大学（北京）,北京 100083; 4.浙江省地质调查院,浙江 杭州 311203;
5.江西省地质调查院,江西 南昌 330201 |
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| 摘 要： | 浙江浦江县蒙山剖面陈塘坞组凝灰岩样品高精度SHRIMP锆石U-Pb年龄分别为825.3Ma±8.1Ma和830Ma±6Ma,结合江绍断裂带以北的赣西地区修水组凝灰岩获得的SHRIMP锆石U-Pb年龄824Ma±5Ma和星子岩群流纹岩中锆石U-Pb年龄825Ma±5Ma,以及庐山筲箕洼组细碧岩的SHRIMP锆石U-Pb年龄840Ma±6 Ma、流纹岩年龄833Ma±4Ma和831Ma±3Ma,将蒙山剖面陈塘坞组和蒙山组明确定位于820Ma之下,双溪坞群之上的地层单元,从传统的平水群体系中独立出来;并将蒙山剖面陈塘坞组之下的蒙山组枕状玄武岩、细碧岩与庐山地区筲箕洼组枕状玄武岩、细碧岩地层序列对比。陈塘坞组年龄的确定对江绍断裂带区域新元古代地层对比和构造演化具有重要意义。
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| 关 键 词： | 浙江 平水群 双溪坞群 陈塘坞组 凝灰岩 SHRIMP锆石U-Pb定年 |
The revision of the Chentangwu Formation in Neoproterozoic stratigraphic column: Constraints on zircon U-Pb dating of tuff from the Mengshan section in Pujiang County, Zhejiang Province |
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| GAO Lin-zhi,DING Xiao-zhong,LIU Yan-xue,HUANG Zhi-zhong,ZHANG Chuan-heng,XU Xing-miao,WU Xiang-lin,SONG Zhi-rui,ZHANG Heng.The revision of the Chentangwu Formation in Neoproterozoic stratigraphic column: Constraints on zircon U-Pb dating of tuff from the Mengshan section in Pujiang County, Zhejiang Province[J].Geologcal Bulletin OF China,2013,32(7):988-995. |
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| Authors: | GAO Lin-zhi DING Xiao-zhong LIU Yan-xue HUANG Zhi-zhong ZHANG Chuan-heng XU Xing-miao WU Xiang-lin SONG Zhi-rui ZHANG Heng |
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| Institution: | 1. Institute of Geology, CAGS, Beijing 100037, China;
2. Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China;
3. China University of Geosciences, Beijing 100083, China;
4. Zhejiang Institute of Geological Survey, Hangzhou 311203, Zhejiang, China;
5. Jiangxi Institute of Geological Survey, Nanchang 330201, Jiangxi, China |
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| Abstract: | Zircon ages (825Ma±5 Ma) and (830Ma±6 Ma) of tuff in the Chentangwu Formation are reported for the first time from the "Pingshui Group" in Pujiang County, Zhejiang Province. In combination with the SHRIMP U-Pb age (824Ma±5 Ma) of the tuff from the Xiushui Formation and 825Ma±5 Ma of the rhyolite from Xingzi complex Group and the SHRIMP U-Pb age 840Ma±6 Ma of the spilite, the U-Pb ages of the rhyolite(833Ma±4Ma and 831Ma±3Ma) in the Shaoqiwa Formation of the Lushan Mountain in the north part of the Jiang-Shao fault zone, the Chentangwu Formation should be located below the Wuling Movement at 820 Ma and just above the Zhangcun Formation of the Shuangxiwu Group, not belonging to the traditional Pingshui Group. The authors consider that the Mengshan Formation, which is below the Chentangwu Formation, is correlated with the lava pillow and spilite of the Shaoqiwa Formation in Lushan area. The reconfirmed age of the Chentangwu Formation is of important significance for the stratigraphic correlation and tectonic evolution study in the Jiang-Shao fault zone. |
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| Keywords: | Zhejiang Pingshui Group Shuangxiwu Group Chentangwu Formation tuff zircon SHRIMP U-Pb dating |
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