%0 Journal Article
%T Magma evolution of Changbaishan Tianchi volcano:Evidences from the main phenocrystal minerals<br>长白山天池火山岩浆演化——来自主矿物成分的证据
%A LI Ni
%A FAN QiCheng
%A SUN Qian
%A ZHANG WenLan Institute of Geology
%A China Seismological Bureau
%A Beijing
%A China State Key Laboratory for Mineral Deposit Research
%A <br>李霓
%A 樊祺诚
%A 孙谦
%A 张文兰
%J 岩石学报
%D 2004
%I 
%X The main phenocrysts of Changbaishan Tianchi volcanic rocks were olivines, pyroxenes, feldspars and Ti-Fe oxides, which had clear characteristics of components evolution by electron microprobe analysis. From shield-forming stage, cone-forming stage to Holocene eruptions, the content of iron in olivines kept increasing till it almost reached the end-member of fayalite; iron and sodium contents also increased in clinopyroxene. In the meantime, feldspars evolved from labradorite to anorthoclase and sanidine which had more potassium and sodium, and the contents of Fe-Ti oxides in rocks were reduced cleary. The evolution of phenocrysts in three stages of Tianchi volcanic rocks reflected the complete series of Tianchi magma evolution in 2 Ma, which was in conformity with the evolution tide of fractional crystallization.
%K Changbaishan Tianchi volcano
%K Composition of the mineral
%K Magma evolution
%K Fractional crystallization<br>长白山天池火山
%K 主矿物成分
%K 岩浆演化
%K 结晶分异
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=F72290C1F51F4E62&yid=D0E58B75BFD8E51C&vid=A04140E723CB732E&iid=38B194292C032A66&sid=E406B4E9A1BA9D8C&eid=90773C2285A2F0BB&journal_id=1000-0569&journal_name=岩石学报&referenced_num=12&reference_num=27