内蒙古阿德拉嘎乌拉正长花岗岩锆石U-Pb年龄

张玉清; 张建; 屈强; 高清秀

doi:10.13686/j.cnki.dzyzy.2013.04.015

内蒙古阿德拉嘎乌拉正长花岗岩锆石U-Pb年龄

1.
内蒙古自治区地质调查院, 内蒙古呼和浩特 010020;

2.
内蒙古第八地质矿产勘查开发院, 内蒙古乌海 016000;

3.
内蒙古第五地质矿产勘查开发院, 内蒙古包头 014000

详细信息

作者简介: 张玉清(1965-),男,高级工程师,从事区域地质调查和综合研究工作,通信地址内蒙古呼和浩特市金桥开发区世纪五路,E-mail//zhangyqnm@yahoo.com.cn

中图分类号: P588.12;P597

收稿日期: 2013-01-21

修回日期: 2013-03-08

刊出日期: 2013-08-31

U-Pb AGE OF ZIRCON FROM THE SYENOGRANITE IN ADELAGAWULA, INNER MONGOLIA

1.
Inner Mongolia Institute of Geological Survey, Hohhot 010020, China;

2.
No. 8 Institute of Geology and Mineral Exploration and Development, Wuhai 016000, Inner Mongolia, China;

3.
No. 5 Institute of Geology and Mineral Exploration and Development, Baotou 014000, Inner Mongolia, China

Received Date: 21 January 2013

Revised Date: 08 March 2013

Publish Date: 31 August 2013

摘要

摘要: 阿德拉嘎乌拉正长花岗岩出露于中蒙边界一线，1：20万区域地质调查将其划归于燕山早期侵入岩（Kγ52），1：25万区域地质调查划归于早二叠世碱长花岗岩（P1χγ）.通过单颗粒锆石U-Pb同位素稀释法测定其年龄，206Pb/238U表面年龄加权平均值为273.1±0.4 Ma.结合区域地质资料和前人研究成果分析，该正长花岗岩为早二叠世晚期岩浆活动的产物.岩石具高硅、高钾、过铝、贫铁镁钙的特征，属造山后的I型花岗岩.岩石稀土总量偏低，轻重稀土元素分馏程度不明显，δEu在0.07~0.60之间，铕强烈亏损，稀土元素配分曲线呈“V”字型.
- 二叠纪 /
- 正长花岗岩 /
- I型 /
- 锆石U-Pb年龄 /
- 阿德拉嘎乌拉 /
- 内蒙古
Abstract: The Adelagawula syenogranite occurs in Abaga Qi, Inner Mongolia, near the Sino-Mongolian border. The intrusive rock was assigned to Early-Yanshanian (Kγ52) by 1:200 000 regional geological surveyor or Lower Permian as alkali feldspar granite(P1χγ) in 1:250 000 regional geological survey. The U-Pb isotopic dating of the syenogranite shows the age of 273.1±0.4 Ma. Combined with regional geological data and previous research, it is possibly a product of Early Permian magmatism. The syenogranite, with high silica, high potassium, per-aluminum and poor calcium-magnesium-iron, belongs to post-orogenic I-type granite. The REE distribution is in V-shaped pattern, with low total rare earth content, unobvious fractionation of LREE and HREE, δEu values ranging from 0.07 to 0.60 and strongly depleted Eu.
- Permian /
- syenogranite /
- I-type /
- zircon U-Pb age /
- Adelagawula /
- Inner Mongolia

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内蒙古阿德拉嘎乌拉正长花岗岩锆石U-Pb年龄

1. 内蒙古自治区地质调查院, 内蒙古 呼和浩特 010020; 2. 内蒙古第八地质矿产勘查开发院, 内蒙古 乌海 016000; 3. 内蒙古第五地质矿产勘查开发院, 内蒙古 包头 014000

作者简介: 张玉清(1965-),男,高级工程师,从事区域地质调查和综合研究工作,通信地址 内蒙古呼和浩特市金桥开发区世纪五路,E-mail//zhangyqnm@yahoo.com.cn

U-Pb AGE OF ZIRCON FROM THE SYENOGRANITE IN ADELAGAWULA, INNER MONGOLIA

1. Inner Mongolia Institute of Geological Survey, Hohhot 010020, China; 2. No. 8 Institute of Geology and Mineral Exploration and Development, Wuhai 016000, Inner Mongolia, China; 3. No. 5 Institute of Geology and Mineral Exploration and Development, Baotou 014000, Inner Mongolia, China

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1.
内蒙古自治区地质调查院, 内蒙古呼和浩特 010020;

2.
内蒙古第八地质矿产勘查开发院, 内蒙古乌海 016000;

3.
内蒙古第五地质矿产勘查开发院, 内蒙古包头 014000

作者简介: 张玉清(1965-),男,高级工程师,从事区域地质调查和综合研究工作,通信地址内蒙古呼和浩特市金桥开发区世纪五路,E-mail//zhangyqnm@yahoo.com.cn

1.
Inner Mongolia Institute of Geological Survey, Hohhot 010020, China;

2.
No. 8 Institute of Geology and Mineral Exploration and Development, Wuhai 016000, Inner Mongolia, China;

3.
No. 5 Institute of Geology and Mineral Exploration and Development, Baotou 014000, Inner Mongolia, China