文档介绍:: .
쟠몣볓떱룹냟퇒탍춭℀∀뿳kaline series.The REE are
characterized by LREE enrichment,with obvious negative Eu anomalies.The trace elements are
characterized by K,Rb,Ba,etc enrichment obviously;Ta,Nb,Zr,Hf,etc enrichment relative-
ly;P,Ti,Y,Yb,etc depletion obviously.The characteristics of the REE and trace elements in-
dicated the continental margin arc tectonic setting.Combining regional geology background and
geochemistry of the igneous rocks in Jiadanggen deposit,the Jiadanggen igneous rocks may be
formed in the early stage of the collision orogeny,continental margin arc and collision orogeny
coexistence environment.And it was formed from dehydration of residual oceanic crust which
caused mantle wedge partial melting.
收稿日期 修回日期
:2012-10-16; :2012-12-24
基金项目 青海省都兰 鄂拉山地区成矿条件及找矿方向研究
: — (2008026362 )
作者简介 向鹏 男 矿 物 学 岩 石 学 矿床学专业硕士研究生 主要从事地质矿产工作与研究
: (1986-), , 、 、 , 。E-mail:
xpstc@163.com西 北 地 质 年
041 NORTHWESTERN GEOLOGY 2013
Key words: Elashan district; porphyry copper deposit; geochemistry of igneous rocks;
tectonic setting
前言 —新近系 贵 德 群 ( ) 及 第 四 纪 ( ) 地 层 出
1 NG1 Q
露。区内褶皱和断裂较发育,区域主体构造线呈北
西 北北西向展布 此外有少量呈近南北向展布
加当根铜 (钼)矿床位于青海省共和县西南, — ,