内蒙古扎鲁特地区毛伊勒吐岩体形成时代及构造环境

详细信息

收稿日期: 2011-12-07

修回日期: 2012-01-06

刊出日期: 2012-04-30

THE FORMING AGE AND TECTONIC ENVIRONMENT OF THE MAOYILETU ROCK BODY IN JARUD, INNER MONGOLIA

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Received Date: 07 December 2011

Revised Date: 06 January 2012

Publish Date: 30 April 2012

摘要: 通过对宏观地质特征、岩石矿物学特征、岩石化学和地球化学特征、同位素年代学研究，对毛伊勒吐岩体形成时代和构造环境进行了探讨.依据岩石化学分析结果和岩石学特征，认为该岩体为钙碱性岩石.对其中的石英闪长岩进行了SHRIMP锆石U-Pb年代学测定，206Pb/238U表面年龄统计权重平均值为147.97±0.95 Ma，表明毛伊勒吐岩体侵位时代属于晚侏罗世.结合区域地质演化特征分析，该石英闪长岩是在板块碰撞后地壳抬升时期形成的.
- 毛伊勒吐地区 /
- 侏罗纪 /
- 石英闪长岩 /
- 锆石U-Pb年龄 /
- 内蒙古
Abstract: With study on its geological background, petrologic and mineralogical characteristics, geology, geochemistry and isotopic chronology, the structural environment and forming age of the Maoyiletu rock body are discussed. The geological and geochemical characteristics show the calc alkaline characteristics. According to the SHRIMP U-Pb isotope chronologic analysis result, the statistical weight average of 206Pb/238U surface age is 147.97±0.95 Ma, which represents the emplacement age of the rock body, belongs to Late Jurassic period. Combined with the analysis on the evolution characteristics of regional geology, the quartz diorite was formed during the crustal uplifting after the plate collision.
- Maoyiletu area /
- Jurassic /
- quartz diorite /
- U-Pb age of zircon /
- Inner Mongolia