| 新疆北山构造带西段小长山南超单元花岗岩特征 |
| |
| 引用本文： | 肖渊甫,吴德超,邓江红,王道永.新疆北山构造带西段小长山南超单元花岗岩特征[J].岩石矿物学杂志,2002,21(2):162-168. |
| |
| 作者姓名： | 肖渊甫 吴德超 邓江红 王道永 |
| |
| 作者单位： | 成都理工大学,成都,610059 |
| |
| 摘 要： | 小长山南超单元花岗岩是新疆北山构造带中重要的地质体 ,为华力西中期第 2序次岩浆侵入活动的产物 ,包括 5个单元 ,出露面积 132 .9km2 ,其中第 4单元同位素地质年龄 32 0 .2Ma±2 3Ma(锆石 ,Pb -Pb法 )。岩石系列属钙碱性 ,为明显同源岩浆演化序列 ,微量元素指示其具大陆弧背景下成熟弧花岗岩和I型花岗岩特征。综合分析后认为小长山南超单元花岗岩属北山克拉通裂谷闭合期岩浆强力就位产物
|
| 关 键 词： | 北山构造带 裂谷 花岗岩超单元 成熟弧 闭合期 |
| 文章编号： | 1000-6524(2002)02-0162-07 |
| 修稿时间： | 2001年11月25 |
Characteristics of southern Xiaochangshan superunit granites in western Beishan tectonic belt, Xinjiang |
| |
| XIAO Yuan_fu,WU De_chao,DENG Jiang_hong and WANG Dao_yong.Characteristics of southern Xiaochangshan superunit granites in western Beishan tectonic belt, Xinjiang[J].Acta Petrologica Et Mineralogica,2002,21(2):162-168. |
| |
| Authors: | XIAO Yuan_fu WU De_chao DENG Jiang_hong and WANG Dao_yong |
| |
| Abstract: | The southern Xiaochangshan granitic intrusive is an important geological body in
Beishan tectonic belt, Xinjiang, produced by the second sequence magmatic intrusion in the middle Hercynian period. The superunit is composed of five units covering an area of about 132.9 km2. The isotopic geological age of the fourth unit is 320.2±23 Ma (zircon, lead-lead age method). The rocks are of calc-alkaline series and belong obviously to the comagmatic evolutionary sequence. Trace elements show characteristics of the mature arc granite in the background of the land arc and I-type granite. The superunit was formed by the strong magmatic intrusion during the closing period of Beishan craton rift valley. |
| |
| Keywords: | Beishan tectonic belt rift valley granite super unit the mature arc closing period |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩石矿物学杂志》浏览原始摘要信息 |
| 点击此处可从《岩石矿物学杂志》下载免费的PDF全文 |
|
