| 曲晓明,王鹤年.郭家岭花岗岩的时代与成因[J].地质找矿论丛,1995,(3):24-32 |
| 郭家岭花岗岩的时代与成因 |
| THE AGE AND GENESIS OF GUOJIALING GRANITE |
| 投稿时间：1995-06-08 修订日期：1995-07-13 |
| DOI：10.6053/j.issn.1001-1412.1995.3. 003 |
| 中文关键词: 郭家岭 花岗岩 壳幔混合 |
| 英文关键词: |
| 基金项目: |
|
| 摘要点击次数: 1294 |
| 全文下载次数: 2474 |
| 中文摘要: |
| 与前人的划分不同,本文所指的郭家岭花岗岩只包括郭家岭和丛家两个岩体。由郭家岭岩休的5个全岩样品给出的Rb-Sr等时线年龄为200.6±3.48Ma,(87Sr/86Sr)i=0.71127、R=0.99955,表明该岩体是印支运动末期形成的。常量元素、微量元素及稀土元素表明该花岗岩是由壳幔物质混合形成的。岩浆作用包括二个阶段:早期的花岗闪长岩构成主体,壳幔物质的混合比为65:35;晚期的石英闪长岩呈小岩株产出,壳幔物质接近1:1. |
| 英文摘要: |
| Different from the former classification this paper divides Guojialing Granite into Guojialing and Congjia bodies. 5 rock samples from Guojialing body gives a Rb-Sr isochron age of 200.6±3.48Ma, (87Sr/86Sr)1=0.71127, R=0.99955, Which shows that the granite formed in the end stage of Indosinian movement.Major, trace and rare earth elements all indicate that the granite formed from the mixing of crustal and mantle materials. The magmatism consists of two stages:the early granediorite constitutes the main part and the mixing ratio of crustal and mantle materials is 65:35;the late quartz diorite occurs as a smallstock in the Guojialing granodiorite body and its mixing ratio of crustal and mantle materials is close to 1:1 |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
