岛弧环境中不同成因的火成岩组合及其地质意义  

IGNEOUS ASSEMBLAGES OF DIFFERENT ORIGIN IN ISLAND ARC AND THEIR GEOLOGICAL SIGNIFICANCES

作　　者：欧阳京[1] 汪双双[1] 于漫[1] 刘晔[1] 王凡[1] 尚兆聪[1] 姚超[1] 王金荣[1] 

机构地区：[1]兰州大学资源环境学院,甘肃兰州730000

出　　处：《甘肃地质》2010年第2期18-26,共9页Gansu Geology

摘　　要：岛弧环境的形成是与大洋板块俯冲作用有关,由俯冲流体作用于地幔楔部分熔融形成的钙碱性火成岩组合是岛弧环境中物质组成的主体。此外,目前还识别出与俯冲作用有关的其它的岩石类型:埃达克岩、富铌玄武岩、TTG、赞岐岩、玻安岩等,它们指示着不同的地球动力学背景、壳—幔相互作用过程以及源岩发生部分熔融的物理化学条件。本文主要对形成于岛弧环境中不同成因的火成岩组合的特征、形成机制、成矿作用及动力学意义进行了综述。The formation of island-arc settings is related with oceanic plate subduction. The eale-olkaline magma series, which were formed from the melt body of the mantle wedge by the process of subdueted fluid, is the main part of island-arc settings. In addition, other types of rocks related to subduction have been distin- guished： Adakites, Nb-riched basahs, TTG, Sanukites, Boninites and so on, which indicate different backgrounds of earth dynamics, processes of interaction between crust and mantle, physical and chemical conditions causing source＇s melting. This paper mainly discusses synthetically on magma series of different origin, their characteris- tics of geochemistry, mineralization, geodynamic mechanism, and geological significance.

关 键 词：岛弧环境 火成岩组合 地幔楔 壳-幔作用 

分 类 号：P588.1[天文地球—岩石学]