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| 澜沧江缝合带吉岔蛇纹岩中闪长岩和俄咱辉长岩中锆石SHRIMP U-Pb定年及其地质意义 | |
| 引用本文： | 魏君奇,王晓地,庄晓,刘云华.澜沧江缝合带吉岔蛇纹岩中闪长岩和俄咱辉长岩中锆石SHRIMP U-Pb定年及其地质意义[J].岩石学报,2008,24(6):1297-1301. |
| 作者姓名： | 魏君奇 王晓地 庄晓 刘云华 |
| 作者单位： | 1. 大陆动力学国家重点实验室,西北大学地质学系,西安,710069 2. 宜昌地质矿产研究所,宜昌,443003 3. 长安大学地球科学与国土资源学院,西安,710054 |
| 摘 要： | 白济汛镁铁-超镁铁岩由吉岔蛇纹岩和俄咱辉长岩岩块组成,属澜沧江缝合带中的蛇绿岩块体.锆石SHRIMPU-Pb年龄测定表明,吉岔蛇纹岩(＞297Na)和俄咱辉长岩(303Ma)与金沙江缝合带中蛇绿岩的形成时间(300～294Ma)一致.说明金沙江缝合带和澜沧江缝带中的蛇绿岩,同为三江地区古特提斯洋盆扩张期形成的洋壳残片. |
| 关 键 词： | 澜沧江缝合带 镁铁-超镁铁岩 锆石SHRIMP U-Pb年龄 地质意义 |
Zircon SHRIMP U-Pb dating of diorite among Jicha serpentine and Eza grabbro from Lancangjiang belt, Yunnan Province and its geological significance |
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| WEI JunQi,WANG XiaoDi,ZHUANG Xiao,LIU YunHua.Zircon SHRIMP U-Pb dating of diorite among Jicha serpentine and Eza grabbro from Lancangjiang belt, Yunnan Province and its geological significance[J].Acta Petrologica Sinica,2008,24(6):1297-1301. | |
| Authors: | WEI JunQi WANG XiaoDi ZHUANG Xiao LIU YunHua |
| Abstract: | The Baijixun mafic-uhramafic rocks are belong to Lancangjiang ophiolite belt,and are composed of rock mass and tectonic rock slice,and can be divided into the Jicha serpentine and the Eza grabbro.Dated using the ziron SHRIMP U-Pb,the magmatic age of the Jicha serpentine is over 297Ma and the Eza grabbro is 303Ma,and the Jinshajiang ophiolite (300-294Ma)is formed in same the time.This indicates the Baijixun mafic-ultramafic rocks and Jinshajiang ophiolite were from ocean crust relic,which were formed in same... |
| Keywords: | Lancangjiang belt Mafic-ultramafic rocks Zircon SHRIMP U-Pb age Geological significance |
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