地球学报2017，Vol.38Issue(2)：177-192,16.DOI:10.3975/cagsb.2017.02.11
长白山天池火山的岩石矿物学特征——对结晶分异过程和岩浆混合作用的启示
Petrological and Mineralogical Characteristics of Tianchi Volcanoe, Changbai Mountain: Implications for Crystallization Differentiation and Magma Mixing
摘要
Abstract
In this study,the authors analyzed lots of rocks and minerals from the whole eruptive sequence.Basalts mainly consist of plagioclase,augite,and olivine,whereas trachyte and comendite mainly consist of alkali-feldspar,ferroaugite,fayalite together with quartz,monazite and plenty of Fe-Ti oxides,which exhibits a crystallization differentiation trend.Meanwhile there are lots of disequilibrium phenomena such as unmatched mineral combination,zonation,and resorption.The authors infer that magma mixing existed in Heishigou basalt,trachyte of the first and third stage cone building and millennium eruption pumice of Tianchi volcanoes.According to the petrologic and chronologic characteristics,the trachytes evolved from different stages of basalts whereas the comenditie evolved from the cone building trachytes.The basalts were formed by partial melting and crystallization differentiation at different depths.关键词
长白山/天池火山/矿物学/结晶分异/岩浆混合Key words
Changbai Mountain/Tianchi volcanoe/mineralogy/crystallization differentiation/magma mixing分类
天文与地球科学引用本文复制引用
陈晓雯,魏海泉,杨良锋,陈正全..长白山天池火山的岩石矿物学特征——对结晶分异过程和岩浆混合作用的启示[J].地球学报,2017,38(2):177-192,16.基金项目
本文由国家自然科学基金(编号:41172304)和国土资源部公益性行业科研专项经费(编号:201011003)联合资助.This study was supported by National Natural Science Foundation of China (No.41172304) and the Special Scientific Research Fund of Public Welfare Profession of Ministry of Land and Resources of the People's Republic of China (No.201011003). （编号:41172304）
