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| 福建东山县澳角村澳角群花岗质石榴黑云片麻岩锆石SHRIMP U-Pb定年及其地质意义 | |
| 引用本文： | 冯艳芳,邓晋福,肖庆辉,邢光福 陆松年,崔显岳 公凡影 甄世民 贾德龙 齐钒宇.福建东山县澳角村澳角群花岗质石榴黑云片麻岩锆石SHRIMP U-Pb定年及其地质意义[J].中国地质,2011,38(1):103-108. |
| 作者姓名： | 冯艳芳 邓晋福 肖庆辉 邢光福 陆松年 崔显岳 公凡影 甄世民 贾德龙 齐钒宇 |
| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京,100083;中国地质调查局发展研究中心,北京,100037 2. 南京地质矿产研究所,江苏南京,210016 3. 中国地质调查局发展研究中心,北京,100037;天津地质矿产研究所,天津,300170 4. 中国地质矿业总公司,北京,100029 5. 中国地质大学地球科学与资源学院,北京,100083 |
| 基金项目： | 东部沿江沿海经济区基础地质综合研究项目(1212010610611); 全国重要矿产成矿地质背景研究项目(1212010733802); 中国东部中生代大陆岩石圈剧变过程、动力学机制与矿产资源响应项目(1212010711814); 张家口大麻坪橄榄岩底辟体及脉状苦橄岩的初步研究项目(GPMR0735)资助 |
| 摘 要： | 本文对福建东山县澳角村澳角群花岗质石榴黑云片麻岩中17颗锆石进行了SHRIMP U-Pb同位素年龄测定。结果显示锆石Th/U比值变化于0.31~1.01,平均值为0.48,为典型的岩浆锆石;其中16个分析点在谐和图上分布较为集中,206Pb/238U年龄加权平均值为(152.8±1.6)Ma(n=17,MSWD=1.12);结合锆石自形、发育岩浆环带等特点,该年龄被解释为澳角群亲营山组花岗质石榴黑云片麻岩的形成年龄。其所指示的地质意义:(1)福建东山县澳角村澳角群亲营山组花岗质石榴黑云片麻岩形成于晚侏罗纪,而非前泥盆纪;(2)福建东山县澳角村澳角群亲营山组应解体为表壳岩与变质侵入体。 |
| 关 键 词： | 福建东山县 澳角群亲营山组 花岗质石榴黑云片麻岩 锆石SHRIMP U-Pb定年 地质意义 |
Zircon U-Pb SHRIMP isotopic dating of granitic garnet-biotite gneiss of the Aojiao Group at Aojiao Village of Dongshan County, Fujian Province, and its geological significance |
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| FENG Yan-fang,DENG Jin-fu,XIAO Qing-hui,XING Guang-fu,LU Song-nian,CUI Xian-yue,GONG Fan-ying,ZHEN Shi-min,JIA De-long,QI Fan-yu.Zircon U-Pb SHRIMP isotopic dating of granitic garnet-biotite gneiss of the Aojiao Group at Aojiao Village of Dongshan County, Fujian Province, and its geological significance[J].Chinese Geology,2011,38(1):103-108. | |
| Authors: | FENG Yan-fang DENG Jin-fu XIAO Qing-hui XING Guang-fu LU Song-nian CUI Xian-yue GONG Fan-ying ZHEN Shi-min JIA De-long QI Fan-yu |
| Institution: | FENG Yan-fang1,2,DENG Jin-fu1,XIAO Qing-hui1,XING Guang-fu3,LU Song-nian2,4,CUI Xian-yue5,GONG Fan-ying1,ZHEN Shi-min1,JIA De-long1,QI Fan-yu1(1.College of Earth Sciences and Mineral Resource,China University of Geosciences,Beijing 100083,China,2.Development and Research Center,China Geological Survey,Beijing 100037,3.Nanjing Institute of Geology and Mineral Resources,Nanjing 210016,Jiangsu,4.Tianjin Institute of Geology and Mineral Resources,Tianjin 300170,5.China National Geological ... |
| Abstract: | In this paper the authors conducted zircon U-Pb SHRIMP isotopic dating of the granitic garnet-biotite gneiss of the Aojiao Group at Aojiao Village of Dongshan County in Fujian Province.The Th/U ratios in the range of 0.31-1.01(0.48 on average) show that the zircon is a typical magmatic mineral.The weighted mean 206Pb/238U age is 152.8±1.6 Ma(n=17,MSWD=1.12),which is considered to be the formation age of the gneiss.Some conclusions have been reached:(1)The granitic garnet-biotite gneiss of the Aojiao Group was formed in late Jurassic rather than in pre-Devonian;(2)the Qinyingshan Formation of the Aojiao Group should be divided into metamorphic intrusions and metamorphic sedimentary strata. |
| Keywords: | Dongshan County of Fujian Province Qinyingshan Formation of Aojiao Group granitic garnet-biotite gneiss geological significance |
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