| 华北中部狐偃山杂岩体形成时代研究——来自榍石U-Pb同位素年代学的证据 |
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| 引用本文： | 何佳佳,张乔,靳梦琪,周俊林,李玉宏,陈高潮.华北中部狐偃山杂岩体形成时代研究——来自榍石U-Pb同位素年代学的证据[J].西北地质,2022(1):50-63. |
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| 作者姓名： | 何佳佳 张乔 靳梦琪 周俊林 李玉宏 陈高潮 |
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| 作者单位： | 西安城市发展（集团）有限公司;自然资源部岩浆作用成矿与找矿重点实验室;西北地质调查科技创新中心 |
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| 基金项目： | 陕西省科技计划项目“基于UThPb同位素年代学方法计算华山岩体中氦气资源量”(2021JQ327);中国地质调查局地质调查项目“关中地区氦气资源调查”(DD20190103);陕西省创新人才推进计划“造山带地层层序恢复:以甘蒙北山造山带南部的石炭—二叠系为例”(2021KJXX74)。 |
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| 摘 要： | 近年随着定年技术的发展,榍石LA-ICP-MS U-Pb定年法逐渐被学者采用,用来揭示某些特殊岩石类型的形成时代,如碱性岩.华北中部狐偃山碱性杂岩体由多个侵入体组成,岩性主要为二长岩类,岩石中发育大量继承锆石,结晶锆石相对较少,但包含大量岩浆榍石.本次研究即利用榍石LA-ICP-MS U-Pb定年法,对研究相对薄弱的矿...
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| 关 键 词： | 二长岩 LA-ICP-MS 榍石 狐偃山 华北中部 |
Chronology Framework of Huyanshan Complex in Central North China Craton:Evidence from U-Pb Dating of Titanite |
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| HE Jiajia,ZHANG Qiao,JIN Mengqi,ZHOU Junlin,LI Yuhong,CHEN Gaochao.Chronology Framework of Huyanshan Complex in Central North China Craton:Evidence from U-Pb Dating of Titanite[J].Northwestern Geology,2022(1):50-63. |
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| Authors: | HE Jiajia ZHANG Qiao JIN Mengqi ZHOU Junlin LI Yuhong CHEN Gaochao |
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| Institution: | (Xi’an Urban Development(Group) Co.,Ltd., Xi’an 710004,Shaanxi,China;Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MNR, Xi’an Center of China Geological Survey, Xi’an 710054,Shaanxi,China;Northwest Geological Survey Science and Technology Innovation Center, Xi’an, 710054,Shaanxi,China) |
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| Abstract: | With the development of dating technique,LA-ICP-MS U-Pb dating of titanite has been applied to some special rock types such as alkaline rocks.The Huyanshan alkaline complex was composed of several plutons;the major lithology was monzonite with abundant inherited zircons and magmatic titanites,and little crystallized zircons.This study analyzed chronologically the two monzonites of Kuangquan and Langwogou based on the LA-ICP-MS U-Pb dating of titanite.Results show that the two were emplaced at 129~130Ma.Meanwhile zircon LA-ICP-MS U-Pb dating was conducted on the same two samples as a contrast.The two dating techniques are consistent within the error range.According to previous studies,Monzonites of the main part of Huyanshan complex were emplaced in the early Early Cretaceous(127~131 Ma),while small amount of syenites were formed in the late Early Cretaceous(111~114 Ma),eventually forming the Huyanshan complex. |
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| Keywords: | monzonite LA-ICP-MS titanite Huyanshan central North China |
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