| 福建政和“稻香组”岩石组合及锆石LA-ICP-MS U-Pb年代学探讨 |
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| 引用本文： | 隰弯弯,陈世忠,朱筱婷.福建政和“稻香组”岩石组合及锆石LA-ICP-MS U-Pb年代学探讨[J].中国地质,2015(2):421-434. |
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| 作者姓名： | 隰弯弯 陈世忠 朱筱婷 |
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| 作者单位： | 中国地质调查局南京地质调查中心 |
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| 基金项目： | 中国地质调查局项目(1212011120882)资助 |
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| 摘 要： | 出露于政和县星溪、稻香、铁山一带的稻香组岩石组合十分复杂,火山岩、沉积岩及变质岩混杂。而其地层时代也一直未有定论。目前,稻香组已经被重新划分为3套分属不同时代的岩性组合,上部和中部分别划归为新元古代和早侏罗世;根据岩石变形变质特征和锆石LA-ICP-MS U-Pb测年数据,下部火山-沉积组合的地层时代应为早白垩世晚期,其地层时代和形成环境与石帽山群相似。
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| 关 键 词： | 稻香组 岩石组合 锆石LA-ICP-MS U-Pb年代学 政和—大埔深大断裂 政和地区 |
A discussion on the rock association and zircon LA-ICP-MS U-Pb dating of Daoxiang Formation in Zhenghe County, Fujian Province |
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| XI Wan-wan,CHEN Shi-zhong,ZHU Xiao-ting.A discussion on the rock association and zircon LA-ICP-MS U-Pb dating of Daoxiang Formation in Zhenghe County, Fujian Province[J].Chinese Geology,2015(2):421-434. |
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| Authors: | XI Wan-wan CHEN Shi-zhong ZHU Xiao-ting |
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| Institution: | XI Wan-wan;CHEN Shi-zhong;ZHU Xiao-ting;Nanjing Geological Surver Center,China Geological Survey; |
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| Abstract: | Abstract: The rock association of the Daoxiang Formation which occurs in Xingxi, Daoxiang and Tieshan area of Zhenghe County is very complex and comprises volcanic rocks, sedimentary rocks and metamorphic rocks. The geological age of the Daoxiang Formation remains unclear. The Daoxiang Formation is now divided into three suites of lithologic association which belongs to different geological ages. The upper and middle segment of Daoxiang Formation belongs to late Proterozoic and Early Jurassic respectively. The lower segment of the rock association which is regarded as the combination of silicolite-mudstone-siltstone-volcanic rocks was formed at the late period of Early Cretaceous according to the zircon LA-ICP-MS U-Pb dating of vesicular basalt and silicified mudstone, and its diagenetic environment is similar to that of the Shimaoshan Group. |
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| Keywords: | rock association Daoxiang Formation zircon U-Pb dating Zhenghe-Dabu?fault Zhenghe |
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