北山三道明水地区晚志留世埃达克岩:强烈快速俯冲的证据  

Late Silurian Adakite in the Sandaomingshui Area,Beishan:Evidence for Intense Rapid Subduction

作　　者：王硕 潘志龙 张欢 陈超 张金龙 李庆喆 WANG Shuo;PAN Zhi-long;ZHANG Huan;CHEN Chao;ZHANG Jin-long;LI Qing-zhe(Regional Geological Survey Institute of Hebei Province,Langfang 06500,China)

机构地区：[1]河北省区域地质调查院,河北廊坊065000

出　　处：《河北地质大学学报》2021年第4期35-43,共9页Journal of Hebei Geo University

基　　金：中国地质调查局基础调查项目(12120113056500)。

摘　　要：以北山三道明水地区晚志留世埃达克质中粒更长花岗岩为例,通过岩石地球化学以及锆石U-Pb年代学的研究,证实其形成于强烈快速的俯冲背景之下。综合区域地质背景,进一步提出了区内埃达克岩可能是北山洋向南强烈快速俯冲过程中发生熔融的结果,这对埃达克岩成因模式的进一步探讨以及北山地区早古生代板块构造演化的研究具有重要的意义。Taking the Late Silurian Adakitic intermediate-grained longer granites in the Sandao Mingshui area of Beishan as an example,the study of petrogeochemistry and zircon U-Pb chronology confirms that the granites were formed under a strong and rapid subduction background.Based on the regional geological background,it is suggested that the adakite in this area may be the result of melting during the strong and rapid subduction of the Beishan Ocean to the south,which is of great significance to the further exploration of the genetic model of adakite and the study of the evolution of plate tectonics in the early Paleozoic in the Beishan area.

关 键 词：埃达克岩 板片熔融 快速俯冲 古亚洲洋 

分 类 号：P597.3[天文地球—地球化学]