安徽庐江—枞阳地区A型花岗岩的LA-ICP-MS定年及其地质意义

范裕,周涛发,袁峰,钱存超,陆三明. 安徽庐江—枞阳地区A型花岗岩的LA-ICP-MS定年及其地质意义[J]. 岩石学报, 2008, 24(8).
引用本文: 范裕,周涛发,袁峰,钱存超,陆三明. 安徽庐江—枞阳地区A型花岗岩的LA-ICP-MS定年及其地质意义[J]. 岩石学报, 2008, 24(8).
DAVID Cooke,FAN Yu,ZHOU TaoFa,YUAN Feng,QIAN CunChao,LU SanMing,DAVID Cooke. LA-ICP-MS zircon U-Pb ages of the A-type granites in the Lu-Zong(Lujiang-Zongyang) area and their geological significances[J]. Acta Petrologica Sinica, 2008, 24(8).
Citation: DAVID Cooke,FAN Yu,ZHOU TaoFa,YUAN Feng,QIAN CunChao,LU SanMing,DAVID Cooke. LA-ICP-MS zircon U-Pb ages of the A-type granites in the Lu-Zong(Lujiang-Zongyang) area and their geological significances[J]. Acta Petrologica Sinica, 2008, 24(8).

安徽庐江—枞阳地区A型花岗岩的LA-ICP-MS定年及其地质意义

  • 基金项目:

    国家重点基础研究发展计划(973计划),教育部高等学校博士学科点专项科研基金,国家自然科学基金,安徽省地质勘查专项费项目,安徽省优秀青年科技基金

LA-ICP-MS zircon U-Pb ages of the A-type granites in the Lu-Zong(Lujiang-Zongyang) area and their geological significances

  • 本文对安徽庐江-枞阳地区产出的A型花岗岩体(碱性侵入岩体)进行了锆石LA-ICP-MS U-Pb同位素年代学研究.结果表明,城山岩体、花山岩体、黄梅尖岩体和枞阳岩体的形成年龄分别为126.5±2.1Ma、126.2 ±0.8Ma、125.4±1.7Ma和124.8±2.2Ma,均形成于早白垩世126~124Ma之间.这些岩体的硅含量和全碱含量均较高,准铝质;稀土含量中等,强Eu亏损,呈略右倾的海鸥型稀土配分模式,均为A1型花岗岩.结合长江中下游地区高碱钙碱性侵入岩和盆地内火山岩的研究成果,本文认为126~124Ma是长江中下游地区地壳伸展最强烈的阶段,这一研究成果时探讨长江中下游地区早白垩世早期的动力学背景具有重要的意义.
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刊出日期:  2008-08-31

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