| 山东胶南-威海造山带荣成岩套花岗质片麻岩的形成时代——锆石SHRIMPU-Pb定年 |
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| 引用本文： | 王世进,万渝生,宋志勇,王伟,董春艳,张贵丽.山东胶南-威海造山带荣成岩套花岗质片麻岩的形成时代——锆石SHRIMPU-Pb定年[J].山东地质,2012(5):1-8. |
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| 作者姓名： | 王世进 万渝生 宋志勇 王伟 董春艳 张贵丽 |
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| 作者单位： | [1]山东省地质调查院,山东济南250013 [2]中国地质科学院地质研究所,北京 100037 [3]北京离子探针中心,北京100037 [4]中国科学院地质与地球物理研究所,北京100029 |
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| 摘 要： | 胶南-威海造山带荣成岩套花岗质片麻岩由闪长质片麻岩-石英闪长质片麻岩-英云闪长质片麻-一奥长花岗质片麻岩-花岗闪长质片麻岩-黑云二长花岗质片麻岩-二长花岗质片麻岩类组成，早期为TTG质花岗岩，晚期为二长花岗岩类。自早到晚存在明显的富钾演化特征。根据新的SHRIMPU-Pb锆石定年结果，该岩套早期闪长质片麻岩年龄为（741±10）Ma，英云闪长质片麻岩年龄为780-760Ma。晚期二长花岗质片麻岩年龄为760-714Ma。所以，可把荣成岩套花岗岩时代限定在800-700Ma之间（南华纪），其形成与华北克拉通岩石圈减薄有关。
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| 关 键 词： | 荣成岩套 花岗质片麻岩 南华纪 SHRIMP U-Pb定年 胶南-威海造山带 山东省 |
The Forming Age of Granitic Gneiss in Rongcheng Rock Series in Jiaonan - Weihai Orogen Belt |
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| WANG Shijin,WAN Yusheng,SONG Zhiyong,WANG Wei,DONG Chunyan,ZHANG Guili.The Forming Age of Granitic Gneiss in Rongcheng Rock Series in Jiaonan - Weihai Orogen Belt[J].Geology of Shandong,2012(5):1-8. |
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| Authors: | WANG Shijin WAN Yusheng SONG Zhiyong WANG Wei DONG Chunyan ZHANG Guili |
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| Institution: | 1. Shandong Geological Surveying Institute, Shandong Jinan 250013, China; 2. Chinese Academy of Ge- ological Sciences, Beijing 100037, China; 3. Beijing SHRIMP Center, Beijing 100037, China; 4. Geology and Geophysical Institute of Chinese Academy of Sciences, Beijing 100029, China) |
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| Abstract: | Granitic gneisses in Rongcheng rock series of Jiaonan- Weihai orogen belt is composed of dioritic gneiss - quartz dioritic gneiss - tonalitic gneiss - trondhjemitic granitic gneiss - granodioritic gneiss - biotite monzonitic granitic gneiss -monzonitic granite. It is TTG granitoids in early period, while is monzogranite in the late period. It has obvious evolution characteristics of potassium - rich from early to late period. Ac- cording to new SHRIMP U- Pb zircon dating results, the age of dioritic gneiss in early period is （741± 10） Ma, and the age of tonalite gneiss is 780-760Ma. The age 714Ma. Therefore, the era tion has close relation with of Rongcheng rock series is limited lithospheric thinning of the North of adamellite gneiss in late period is 760 between 800-700Ma （Nanhua）. Its forma- China craton. |
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| Keywords: | Rongcheng rock series granitic gneiss Nanhuaian The SHRIMP U- Pb dating Jiaonan-Weihai orogenic belt Shandong province |
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