花岗岩成因类型划分与地球化学图解判别综述
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摘要
花岗岩是出露最广的侵入岩,是研究地壳运动的主要岩石类型。花岗岩的成因类型主要有3种划分方法:S-I-M-A型、壳幔同熔型-陆壳改造型-幔源型、磁铁矿系列-钛铁矿系列。花岗岩浆活动的板块构造背景一般划分为:同碰撞花岗岩(S-COLG)、火山弧花岗岩(VAG)、洋中脊花岗岩(ORG)、板内花岗岩(WPG)。花岗岩的成因类型与板块构造环境可根据常量元素、稀土元素、微量元素进行图解判别,常用图解为R_1-R_2图解、稀土元素分配型式图、微量元素蛛网图、非活动性元素(Rb-Yb+Ta、Rb-Y+Yb、Ta-Yb、Nb-Y)系列图解。
Granite is the widest distribution intrusion rock and the main rock type in the study of crust movement.There are 3 main genesis types divisions,ie.,S-I-M-A type;crust-mantle syntactic type-land crust reformation type-mantle derived type;magnetite series-titinic iron series.The plate tectonic setting of granite magma movement can be divided generally into syn-collision granite(S-COLG),volcanic arc granite(VAG),ocean ridge granite(ORG),within-plate granite(WPG).And the genesis type and plate tectonic environment of granite can be discriminated with major element,REE,trace element diagram,such as R1-R2 diagram,REE distribution diagram,trace element cobweb diagram,non-active element(Rb-Yb+Ta,Rb-Y+Yb,Ta-Yb,Nb-Y),etc.
Granite is the widest distribution intrusion rock and the main rock type in the study of crust movement.There are 3 main genesis types divisions,ie.,S-I-M-A type;crust-mantle syntactic type-land crust reformation type-mantle derived type;magnetite series-titinic iron series.The plate tectonic setting of granite magma movement can be divided generally into syn-collision granite(S-COLG),volcanic arc granite(VAG),ocean ridge granite(ORG),within-plate granite(WPG).And the genesis type and plate tectonic environment of granite can be discriminated with major element,REE,trace element diagram,such as R1-R2 diagram,REE distribution diagram,trace element cobweb diagram,non-active element(Rb-Yb+Ta,Rb-Y+Yb,Ta-Yb,Nb-Y),etc.
引文
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[2]高秉璋,洪大卫,郑基俭,等.花岗岩类区1∶5万区域地质填图方法指南[M].武汉:中国地质大学出版社,1991.
[3]邱家骧,林景仟主编.岩石化学[M].北京:地质出版社,1991 .
[4]徐克勤,孙鼎,王德滋,等.华南花岗岩成因与成矿[M].南京:江苏科学技术出版社,1984.
[5]严城民,夏贵光,邓仁宏.滇西北独龙江花岗岩及岩浆作用特征[J].云南地质,2002a,21(2):21～33.
[6]严城民,邓仁宏,王辉.滇西北鲁甸花岗岩新认识[J].云南地质,2002b,21(4):365～377.
[7]孔会磊,董国臣,莫宣学,等.滇西三江地区临沧花岗岩的岩石成因[J].岩石学报,2012,28(5):1 438～1 452.
[8]王学武,刘凤祥,李新仁,等.滇西北云岭陆缘弧大地构造单元的划分与特征[J].地质与资源,2017,26(5):229～233.
[9]李新仁,王长兵,张黎.云南建水县长岭岗碱性侵入岩体岩石特征与成因[J].云南地质,2018,37(2):150～155.
[10]李昌年.火成岩微量元素岩石学[M].武汉:中国地质大学出版社,1992.
[11]陈德潜,陈刚.实用稀土元素地球化学[M].北京:冶金工业出版社,1990 .