欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
出露于大别造山带西部的新县岩体主要侵位于大别杂岩和卢镇关群斜长角闪片麻岩之中.采用锆石La-ICPMS U-Pb定年方法,获得该岩体的主体岩性钾长花岗岩的岩浆锆石年龄为134.3±1.4 Ma,该年龄代表岩体的结晶年龄.综合分析表明,岩体中各类岩石的形成顺序依次为灰黑色中粒辉长闪长岩→灰色中细粒黑云母花岗岩→肉红色粗粒钾长花岗岩→黑云母辉长闪长岩脉、闪长玢岩脉和肉红色花岗斑岩脉.岩体中主体岩性钾长花岗岩的侵位可能预示着大别造山带早白垩世造山过程的即将结束,板内时期的即将来临;黑云母辉长闪长岩脉的侵入可能预示着大别造山带造山过程已经结束,非造山过程已经开始.
英文摘要：
The Xinxian pluton in the west of Dabie orogenic belt intruded Dabie complex and amphibolite of Luzhenguan group.With the method of single zircon LA-ICPMS U-Pb dating,the magmatic zircom age of 134.3±1.4 Ma was obtained from K-feldspar granites in Xinxian pluton.The age denotes the crystallization age of this instrusive body.Compressive analysis showed that the formation sequence of all kinds rocks in this instrusive body was gray black mesograin gabbro-diorite→gray meso-fine grained biotite granite→red flesh coarse grain moyit→biotite gabbro-diorite dyke,diorite-porlphyrite dyke and red flesh granite porphyry dyke.The emplacement of K-feldspar granites,which represents the main rock of Xinxian body,may promise the ending of orogenic process in the Dabie orogenic belt and the coming of the within plate period within the Early Cretaceous.The emplacement of biotite gabbro-diorite dyke may promise the orogenic process in the Dabie orogenic belt had ended,and also indicate the anorogenic period had begun.
同期刊论文项目
同项目期刊论文
期刊信息
位置：