| 黑龙江省东部小兴安岭地区育林岩体形成时代及构造环境探讨 |
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| 引用本文： | 王建民,曲晖,颜秉超.黑龙江省东部小兴安岭地区育林岩体形成时代及构造环境探讨[J].吉林地质,2020,39(1):28-31. |
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| 作者姓名： | 王建民 曲晖 颜秉超 |
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| 作者单位： | 黑龙江省地质调查研究总院,黑龙江 哈尔滨 150036;吉林省地矿信息中心,吉林 长春 130061 |
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| 摘 要： | 东北地区晚三叠世地壳形成与演化是国内外地质学家研究的热点之一,笔者对黑龙江省东部小兴安岭地区育林岩体采用LA-ICP-MS U-Pb技术进行了锆石测年。结果显示:正长花岗岩锆石206 Pb/238 U加权平均年龄为(206.8±1.1)Ma,岩体的形成时代应为晚三叠世。正长花岗岩富铝、富钾,具S型花岗岩特征,形成于碰撞造山的构造环境,与古亚洲洋构造体系演化有关。
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| 关 键 词： | 小兴安岭地区 育林岩体 晚三叠世 碰撞造山环境 |
Discussion on the formation age and tectonic environment of the Yulin rockmass in the Xiaoxing anling area,in Eastern Heilongjiang Province |
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| WANG Jian-min,QU Hui,YAN Bing-chao.Discussion on the formation age and tectonic environment of the Yulin rockmass in the Xiaoxing anling area,in Eastern Heilongjiang Province[J].Jilin Geology,2020,39(1):28-31. |
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| Authors: | WANG Jian-min QU Hui YAN Bing-chao |
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| Institution: | (Research Institute of Geologic Survey of Heilongjiang Province,Harbin 150036,Heilongjiang,China;Information Centre of Geology and Mineral Resources of Jilin Province,Changchun 130061,Jilin,China) |
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| Abstract: | The formation and evolution of the earth s crust in Late Triassic in Northeast China is one of the hot spots studied by geologists at home and abroad.Zircon dating of the Yulin rock mass in the Xiaoxing anling area of Eastern Heilongjiang Province has been carried out by using LA-ICP-MS U-Pb technique.The results show that the zircon 206 Pb/238 U weighted average age of syenogranite is(206.8±1.1)Ma,and the formation age of the rock body should be Late Triassic.Syenogranite is rich in aluminum and potassium,with the characteristics of S-type granite.It was formed in the tectonic environment of collisional orogeny,which is related to the evolution of paleo Asian Ocean tectonic system. |
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| Keywords: | Xiaoxing anling area Yulin rock mass Late Triassic collisional orogenic environment |
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