| 黑龙江省东部依兰地区金沟花岗岩的锆石U-Pb定年及其地质意义 |
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| 引用本文： | 赵立国, 王建民, 王磊, 李娟娟. 黑龙江省东部依兰地区金沟花岗岩的锆石U-Pb定年及其地质意义[J]. 地质与资源, 2016, 25(5): 436-442. doi: 10.13686/j.cnki.dzyzy.2016.05.003 |
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| 作者姓名： | 赵立国 王建民 王磊 李娟娟 |
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| 作者单位： | 黑龙江省地质调查研究总院 齐齐哈尔分院, 黑龙江 哈尔滨 150036 |
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| 基金项目： | 中国地质调查局项目“黑龙江1∶25万佳木斯市(L52C002003)，双鸭山市(L52C002004)幅区调修测”(项目编码1212011120729) |
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| 摘 要： | 为查明黑龙江岩群的形成时代及其构造背景，对出露于黑龙江省东部依兰地区侵入黑龙江岩群的金沟花岗岩体进行了锆石LA-ICP-MS U-Pb定年研究.结果显示：D2279样品锆石多具有清晰的生长振荡环带，其Th/U比值多在0.1~1之间，属于典型的岩浆成因锆石，获得的206Pb/238U加权平均年龄为261.18±0.74 Ma（n=20，MSWD=0.66），代表了岩体结晶年龄.金沟花岗岩体形成时代的厘定，不仅限定了黑龙江岩群的形成时代，同时为进一步探讨佳木斯地块晚古生代构造演化提供了新证据.
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| 关 键 词： | 晚古生代花岗岩 LA-ICP-MS U-Pb定年 黑龙江岩群 佳木斯地块 黑龙江省 |
| 收稿时间： | 2016-04-08 |
| 修稿时间： | 2016-07-04 |
ZIRCON U-Pb DATING AND GEOLOGICAL IMPLICATION OF THE JINGOU GRANITE IN YILAN AREA,EASTERN HEILONGJIANG PROVINCE |
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| ZHAO Li-gou, WANG Jian-min, WANG Lei, LI Juan-juan. ZIRCON U-Pb DATING AND GEOLOGICAL IMPLICATION OF THE JINGOU GRANITE IN YILAN AREA, EASTERN HEILONGJIANG PROVINCE[J]. Geology and Resources, 2016, 25(5): 436-442. doi: 10.13686/j.cnki.dzyzy.2016.05.003 |
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| Authors: | ZHAO Li-gou WANG Jian-min WANG Lei LI Juan-juan |
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| Affiliation: | Qiqihar Branch, Heilongjiang Institute of Geological Survey, Harbin 150036, China |
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| Abstract: | The LA-ICP-MS U-Pb dating is researched for zircon from the Jingou granite in Heilongjiang rock group, which occurs in Yilan area of the Eastern Heilongjiang Province, to identify the formation age and tectonic setting of the Heilongjiang rock group. The results show that the zircon in the sample of D2279 has a clear growth zoning, with Th/U ratios mostly between 0.1 and 1, belonging to typical magmatic zircons. The 206Pb/238U weighted average age is (261.18±0.74) Ma (n=20, MSWD=0.66), which represents the crystallization age of the rock. The definition of the age of Jingou granite not only defines the forming age of Heilongjiang rock group, but also provides new evidence for further exploration of the Late Paleozoic tectonic evolution of Jiamusi block. |
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| Keywords: | Late Paleozoic granite LA-ICP-MS U-Pb dating Heilongjiang rock group Jiamusi block Heilongjiang Province |
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