江山-绍兴断裂带构造格局的新元古代SHRIMP锆石U-Pb年龄证据 |
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引用本文: | 高林志,;张恒,;丁孝忠,;刘燕学,;张传恒,;黄志忠,;许兴苗,;周宗尧.江山-绍兴断裂带构造格局的新元古代SHRIMP锆石U-Pb年龄证据[J].中国区域地质,2014(6):763-775. |
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作者姓名: | 高林志 ;张恒 ;丁孝忠 ;刘燕学 ;张传恒 ;黄志忠 ;许兴苗 ;周宗尧 |
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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]中国地质大学(北京),北京100083; [3]江西省地质调查院,江西南昌330201; [4]浙江省地质调查院,浙江萧山311203 |
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基金项目: | 资助项目:中国地质调查局项目(编号:121201011120131)、全国地层委员会项目(编号:1212011120142)和全国油气基础地质研究与编图项目(编号:2011ZX05043-005)致谢:北京离子探针中心董春燕、张维和石玉若博士在测试期间给予技术保障,杨淳高级工程师和周丽芹、李宁工程师在制靶和阴极发光照相过程中给予帮助;中国地质大学王自强教授在构造解译方面给予指导,在此一并表示感谢. |
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摘 要: | 报道采自双溪坞群不同岩组岩石样品的锆石年龄,其中,平水组英安质凝灰岩SHRIMP锆石U-Pb年龄为908.2±6.8Ma,双溪坞群北坞组安山岩年龄为901.6±5.5Ma,双溪坞群章村组火山角砾岩安山质角砾岩年龄为899±8Ma,上覆河上镇群骆家门组底砾岩(花岗闪长岩)SHRIMP锆石U-Pb年龄为878.96±4.5Ma。通过年龄数据探讨位于该断裂带的构造背景,依据该年龄数据限定区域地层对比和构造演化序列。锆石U-Pb年龄和地球化学标示了江山-绍兴断裂带北侧双溪坞群的沉积地层,地球化学分析表明该群代表了新元古代早期华南洋的中间岛弧。上述年龄为江山-绍兴断裂带变质地层的对比增添了可靠的年龄依据。
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关 键 词: | 江山-绍兴断裂带 双溪坞群 SHRIMP锆石U-Pb年龄 浙江 |
SHRIMP zircon U-Pb dating of the Ji-angshan-Shaoxing faulted zone in Zhejiang and Jiangxi |
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Institution: | GAO Lin-zhi, ZHANG Heng, DING Xiao-zhong, LIU Yan-xue, ZHANG Chuan-heng, HUANG Zhi-zhong, XU Xing-miao, ZHOU Zong-yao (1. Institute of Geology, CAGS, Beijing 100037, China; 2. China University of Geosciences, Beijing 100083, China; 3. Jiangxi Institute of Geological Survey, Nanchang 330201, Jiangxi, China; 4. Zhefiang Institute of Geological Survey, Xiaoshan 311203, Zhejiang, China) |
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Abstract: | This paper reports SHRIMP zircon U-Pb ages (908~878Ma) of andisite and tuff of the Early Neoproterozoic Shuanxiwu Group on the northern side of the Jiangshan-Shaoxing faulted zone and discusses the tectonic background and regional stratigraphic correlation and tectonic evolution of the Jiangshan-Shaoxing faulted zone. The SHRIMP U-Pb ages and geochemical characteristics indicate the Early Neoproterozoic inner arc of the Shuanxiwu Group on the northern side of the Jiangshan-Shaoxing faulted zone. The SHRIMP U-Pb dating data obtained by the authors can provide new evidence for the correlation of metamorphosed strata in the Jiangshan-Shaoxing faulted zone. |
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Keywords: | Jiangshan-Shaoxing faulted zone Shuangxiwu Group SHRIMP zircon U-Pb ages Zhejiang Province |
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