| 内蒙古固阳地区新太古代侵入岩的岩石特征及时代 |
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| 引用本文： | 张维杰,李龙.内蒙古固阳地区新太古代侵入岩的岩石特征及时代[J].地球科学,2000,25(3):221-226. |
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| 作者姓名： | 张维杰 李龙 |
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| 作者单位： | 中国地质大学地球科学与资源学院, 北京 100083 |
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| 基金项目： | 地质矿产部“内蒙古固阳地区三幅 1∶5万联测”项目 |
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| 摘 要： | 通过区调填图在固阳地区新发现了一套新太古代TTG质的侵入岩.这套岩石主要由闪长岩、石英闪长岩、英云闪长岩组成, 虽然遭受了一定程度的变质作用, 但仍保存了较完整的侵入岩外貌, 与太古宙灰色片麻岩在外貌上存在明显区别.岩石为钙碱性系列, 总体属TTG岩系的一部分.根据同位素资料确定岩石的年龄为2 40 0~ 2 5 0 0Ma, 属新太古代末期.
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| 关 键 词： | 新太古代 侵入岩 同位素 内蒙古固阳 |
| 收稿时间： | 2000-02-18 |
PETROLOGY AND DATING OF NEO-ARCHAEAN INTRUSIVE ROCKS FROM GUYANG AREA, INNER MONGOLIA |
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| Zhang Weijie,Li Long,Geng Mingshan.PETROLOGY AND DATING OF NEO-ARCHAEAN INTRUSIVE ROCKS FROM GUYANG AREA, INNER MONGOLIA[J].Earth Science-Journal of China University of Geosciences,2000,25(3):221-226. |
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| Authors: | Zhang Weijie Li Long Geng Mingshan |
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| Abstract: | A suite of Neo-Archaean tonalitic-trondjemites-granodioritic intrusive rocks composed mainly of diorites, quartz diorites, and tonalites are discovered in Guyang district, Inner Mongolia through the regional mapping. Although these intrusive rocks have been metamorphosed to some extent, their relatively perfect appearances quite different from those of the Archaean gray gneisses can still be observed. These rocks within the calc-alkali series are a part of the TTG rock series. The isotopic dating indicates that the age of the rocks at 2 400-2 500 Ma, i.e. at the end of Neo-Archaean. |
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| Keywords: | Neo_Archaean intrusive rocks isotope Guyang Inner Mongolia |
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