| 黑龙江依兰地区变玄武岩及变堆晶辉长岩LA-ICP-MS锆石U-Pb年龄及其地质意义 |
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| 引用本文： | 吕长禄,肖庆辉,冯俊岭,于跃江,杨福深,邓昌洲.黑龙江依兰地区变玄武岩及变堆晶辉长岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J].地质通报,2016,35(7):1081-1094. |
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| 作者姓名： | 吕长禄 肖庆辉 冯俊岭 于跃江 杨福深 邓昌洲 |
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| 作者单位： | 1. 中国地质大学地球科学与资源学院, 北京 100083;2. 黑龙江省地质调查研究总院, 黑龙江哈尔滨 150036;3. 中国地质调查局发展研究中心, 北京 100037;4. 国土资源实物地质资料中心, 河北 三河 065201 |
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| 基金项目： | 中国地质调查局项目（编号：1212011121006） |
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| 摘 要： | 对依兰地区黑龙江混杂岩中的变玄武岩、变枕状玄武岩及变堆晶辉长岩岩块中的锆石进行了LA-ICP-MS U-Pb同位素测定,结果表明,变玄武岩的锆石大量为捕获基底的锆石,其年龄范围大,从3172±24Ma到176±1Ma均有分布,其中具有基性岩典型的板状特征的锆石年龄为243±1Ma,代表了变玄武岩的原岩形成年龄;变枕状玄武岩及变堆晶辉长岩的年龄分别为251±1Ma和252±1Ma,分别代表各自原岩的形成年龄。本次锆石年龄的获得,证明晚二叠世佳木斯地块和松嫩-张广才岭地块之间存在古洋盆,为研究黑龙江杂岩的演化历史提供了重要的年代学依据。
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| 收稿时间： | 2015/10/5 0:00:00 |
| 修稿时间： | 2016/1/29 0:00:00 |
LA-ICP-MS U-Pb ages of zircons from metamorphic basalt and metamorphic accumulated gabbro in Yilan area, Heilongjiang Province, and their geological implications |
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| L&#; Changlu,XIAO Qinghui,FENG Junling,YU Yuejiang,YANG Fushen and DENG Changzhou.LA-ICP-MS U-Pb ages of zircons from metamorphic basalt and metamorphic accumulated gabbro in Yilan area, Heilongjiang Province, and their geological implications[J].Geologcal Bulletin OF China,2016,35(7):1081-1094. |
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| Authors: | L&#; Changlu XIAO Qinghui FENG Junling YU Yuejiang YANG Fushen and DENG Changzhou |
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| Institution: | 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;2. Geological Survey Institute of Heilongjiang, Harbin 150036, Heilongjiang, China;3. Development and Research Center, China Geological Survey, Beijing 100037, China;4. Material Geological Data Center of Ministry of Land and Resources, Sanhe 065201, Hebei, China |
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| Abstract: | In this study, LA-ICP-MS zircon U-Pb method was used to study the geochronology of metamorphic basalt, metamor-phic pillow basalt and metamorphic accumulated gabbro of Heilongjiang complex in Yilan area. The results obtained demonstrate that many zircons in metamorphic basalt originated from basal rocks and their distribution of ages are wide, with their geochronologi-cal ages varying between 3172±24Ma and 176±1Ma. The age of plane textural zircon is 243Ma, which represents the original rock formation age of the metamorphic basalt. Concordant ages of the metamorphic pillow basalt and metamorphic accumulated gabbro are 251±1Ma and 252±1Ma respectively, which represent the formation ages of their original rock. Zircon U-Pb geochronological results demonstrate that an ancient oceanic basin existed between Jiamusi block and Songnen-Zhangguangcailing block during Late Permian. The results obtained by the authors provide important geochronological evidence for studying the tectonic evolution of the Heilongjiang complex. |
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| Keywords: | LA-ICP-MS zircon U-Pb ages Heilongjiang complex metamorphic pillow basalt metamorphic accumulated gabbro |
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