| 阿尔泰造山带西段同造山铁列克花岗岩体锆石U-Pb年龄及其构造意义 |
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| 引用本文：童英,王涛,洪大卫,柳晓明,韩宝福.2005.阿尔泰造山带西段同造山铁列克花岗岩体锆石U-Pb年龄及其构造意义[J].地球学报,26(z1):74-77. |
| DOI：10.3975/cagsb.2005.s1.25 |
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| 基金项目:本文由国家重大基础研究规划项目（编号：2001CB409802)、国际合作基金项目（编号：40210647)、国家自然科学基金项目（编号：40472101、49772105)、西北大学大陆动力学实验室资助。 |
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| 中文摘要:铁列克岩体是阿尔泰造山带西段的一个重要的岩体，显示弧花岗岩特征，其侵位时代一直没有解决。本次La-ICPMS锆石U-Pb定年给出206Pb/238U年龄403±5 Ma(MSWD=4.9)，代表其形成年龄。这为阿尔泰造山带的同造山花岗岩的鉴别和时代确定提供一个证据，也为阿尔泰造山带在早古生代（奥陶纪—泥盆纪）的俯冲造山提供了一个新的年代学制约。 |
| 中文关键词:弧花岗岩 La-ICPMS 中亚造山带 早古生代 洋壳 |
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| Zircon U-Pb Age of Syn-orogenic Tielieke Pluton in the Western Part of Altay Orogenic Belt and Its Structural Lnplications |
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| Abstract:Being an important pluton in the western part of Altay orogen, Tielieke pluton shows arc granitoid characteristics. Its emplacement time, however, remains undetermined. This paper presents a zircon La-ICPMS 206Pb/238U age of 409±5 Ma (MSWD=10)，which is interpreted as its emplacement age. This provides an evidence for discrimination and epoch of syn-orogenic granitoid, and also serves as a new chronological restriction for the subduction-orogeny of Altay orogen in Eopaleozoic (Ordovician-Devonian)． |
| keywords:arc granite La-ICPMS Central Asia Orogenic belt Eopaleozoic ozoic |
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