| 内蒙古科尔沁右翼中旗晚古生代碎屑锆石定年及其意义 |
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| 引用本文： | 张辰昊,寇晓威,颜林杰,徐 备.内蒙古科尔沁右翼中旗晚古生代碎屑锆石定年及其意义[J].地质通报,2015,34(8):1482-1492. |
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| 作者姓名： | 张辰昊 寇晓威 颜林杰 徐 备 |
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| 作者单位： | 1.北京大学造山带和地壳演化教育部重点实验室/北京大学地球与空间科学学院，北京100871；2.吉林省第三地质调查所，吉林 四平136000 |
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| 基金项目： | 国家重点基础研究发展计划(编号：2013CB429806)和中国地质调查局项目(编号：1212011220906) |
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| 摘 要： | 对科尔沁右翼中旗地区晚古生代地层进行碎屑锆石U-Pb定年研究。样品130909-01为凝灰质砂岩,130910-15为岩屑石英砂岩。碎屑锆石年龄可分为4组,由新到老依次为:252~278Ma、286~359Ma、381~462Ma和500Ma之前。碎屑锆石的最小年龄(256.5±1.7Ma)限定了地层沉积下限为晚二叠世。样品中出现大量残留锆石,记录了前寒武纪基底、早古生代岛弧岩浆岩和石炭纪—二叠纪岩浆活动事件。
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| 关 键 词： | 碎屑锆石 科尔沁右翼中旗 晚古生代 |
Dating of late Paleozoic detrital zircon in Horqin Right Wing Middle Banner of Inner Mongolia and its significance |
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| ZHANG Chenhao,KOU Xiaowei,YAN Linjie,XU Bei.Dating of late Paleozoic detrital zircon in Horqin Right Wing Middle Banner of Inner Mongolia and its significance[J].Geologcal Bulletin OF China,2015,34(8):1482-1492. |
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| Authors: | ZHANG Chenhao KOU Xiaowei YAN Linjie XU Bei |
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| Abstract: | The detrital zircon U-Pb geochronology of the Late Paleozoic strata in Horqin Right Wing Middle Banner was studied in this paper. Sample 130909-01 and 130910-15 were tuffaceous sandstone and lithic quartz sandstone samples, respectively. The detrital zircon ages can be divided into four groups: 252~278Ma, 286~359Ma, 381~462Ma and older than 500Ma. The youngest zircon age (256.5±1.7Ma) constrains the maximum sedimentary age of the Late Permian. A large number of relict zircons were existent in the samples, which kept a record of Precambrian basement, early Paleozoic arc magmatic rocks and magmatic activity event during Permian-Carboniferous period. |
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| Keywords: | detrital zircons Horqin Right Wing Middle Banner Late Paleozoic |
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