首页 | 本学科首页   官方微博 | 高级检索  
     检索      

大别山辉石岩—辉长岩体的锆石U—Pb年龄及其地质意义
引用本文:李曙光,洪吉安,李惠民,江来利.大别山辉石岩—辉长岩体的锆石U—Pb年龄及其地质意义[J].高校地质学报,1999,5(3):351-355.
作者姓名:李曙光  洪吉安  李惠民  江来利
作者单位:[1]中国科学技术大学地球与空间科学系 [2]地质矿产部天津地质矿产研究所
摘    要:大别山北部祝家铺,小河口和椒岩三个辉石岩-辉长岩侵入体的锆石给出四个U-Pb谐和年龄,范围均在123 ̄130Ma之间,这表明这些基性/超基性侵入体是碰撞后成因的。由于白垩纪花岗岩脉普遍穿切这些辉长岩体,说明大别山垩纪大规模岩浆事件,是从深部地幔部分熔融开始的,其热动力可能源于地幔上涌。

关 键 词:大别山  镁铁-超镁铁岩  锆石U-Pb  年龄
收稿时间:1999-09-20
修稿时间:1999-09-20

U-Pb ZIRCON AGES OF THE PYROXENITE GABBRO INTRUSIONS IN DABIE MOUNTAINS AND THEIR GEOLOGICAL IMPLICATIONS
Li Shuguang,Hong Jian,Li Huimin,Jiang Laili.U-Pb ZIRCON AGES OF THE PYROXENITE GABBRO INTRUSIONS IN DABIE MOUNTAINS AND THEIR GEOLOGICAL IMPLICATIONS[J].Geological Journal of China Universities,1999,5(3):351-355.
Authors:Li Shuguang  Hong Jian  Li Huimin  Jiang Laili
Institution:1.Department of Earth and Space Sciences,University of Science and Technology of China, Hefei 230026; 2. Tiajin Institute of Geology and mineral Resources, CAGS, Tiajin 300170; 3. Anhui Institute of Geology, No.1 Ningguo Road, Hefei 230026
Abstract:Four U-Pb zircon ages ranging 123~130Ma for the Zhujiapu, Jiaoyan gabbro and Xiaohekou pyroxenite-gabbro intrusions in the Dabie Mountains suggest that these mafic-ultramafic intrusio11s are of the post-collisional origin and crystallized in the Cretaceous.In view of that the Cretaceous granitic dykes cut across the mafic-ultramafic intrusions, the large scale Cretaceous magmatic event in the Dabie Mountains was initiated by partial melting of the mantle in depth, which may be caused by upwelling of the mantle beneath the Dahie Mountains at that time.
Keywords:Dabie Mountains    mafic  ultramafic rocks    U  Pb zircon ages
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《高校地质学报》浏览原始摘要信息
点击此处可从《高校地质学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号