| 铜陵地区铜官山矿田侵入岩锆石SHRIMP定年 |
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| 引用本文： | 吴才来,姚尚志.铜陵地区铜官山矿田侵入岩锆石SHRIMP定年[J].地质学报,2010,84(12):1746-1758. |
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| 作者姓名： | 吴才来 姚尚志 |
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| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037
2. 安徽省地矿局321地质队,安徽铜陵,244033 |
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| 基金项目： | 国家专项项目，创新研究群体科学基金，国家自然科学基金，中国地质调查局项目 |
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| 摘 要： | 铜陵铜官山矿田的中酸性侵入岩属高钾钙碱性系列,主要岩石类型为石英二长闪长岩和花岗闪长岩。本文对该矿田内的铜官山岩体和天鹅抱蛋岩体进行了锆石的SHRIMPU-Pb定年。结果表明,铜官山和天鹅抱蛋石英二长闪长岩的锆石SHRIMPU-Pb年龄几乎相同,分别为141.8±1.0Ma和141.3±1.3Ma,反映它们是同一次岩浆侵入作用的产物。结合锆石CL分析得出,两岩体中均含有新太古代、古元古代和新元古代岩浆型的继承性锆石核,说明本区岩浆的源岩含有古老的下地壳成分,锆石微量及稀土元素特征也表明其为陆壳而非洋壳成因,结合同位素和包体特征,得出岩浆来自富集地幔并含有古老地壳成分。
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| 关 键 词： | 锆石SHRIMP定年，侵入岩，铜官山矿田，铜陵 |
| 收稿时间： | 1/1/1900 12:00:00 AM |
| 修稿时间： | 2010/3/25 0:00:00 |
Zircon SHRIMP dating of intrusive rocks in Tongguashan ore-field from Tongling, Anhui, China |
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| Wu Cailai and yaoshangzhi.Zircon SHRIMP dating of intrusive rocks in Tongguashan ore-field from Tongling, Anhui, China[J].Acta Geologica Sinica,2010,84(12):1746-1758. |
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| Authors: | Wu Cailai and yaoshangzhi |
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| Institution: | Institute of Geology, CAGS,- |
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| Abstract: | The Mesozoic intermediate-acid intrusive rocks in Tongguashan ore-field belongs to the high-potassium (K) calc-alkaline series with main rock types of quartz monzodiorite + granodiorite. Zircon SHRIMP U-Pb dating of Tongguanshan and Tianebaodan bodies showed both have almost the same age, being 141.8±1.0Ma for Tongguanshan and 141.3±1.3Ma for Tebodan body, respectively, indicating they are product of the same period of magmatism. |
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| Keywords: | Zircon SHRIMP dating Intrusive Rock Tongguanshan ore-field Tongling |
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