刘文彬.辽南庄河斜哨岩体LA-ICP-MS锆石U-Pb年龄及岩石地球化学特征[J].地质找矿论丛,2022,37(1):76-83
辽南庄河斜哨岩体LA-ICP-MS锆石U-Pb年龄及岩石地球化学特征
LA-ICP-MS zircon U-Pb dating and geochemical characteristics of Xieshao intrusive body in Zhuanghe area of the South Liaoning province
投稿时间:2021-07-22  
DOI:10.6053/j.issn.1001-1412.2022.01.011
中文关键词:  斜哨岩体  锆石U-Pb年龄  岩石地球化学特征  辽南地区
英文关键词:Xieshao intrusive body  zircon U-Pb age  geochemistry characteristics  the South Liaoning province
基金项目:中国地质调查局项目"辽东-吉南成矿带永吉-凤城地区地质矿产调查"(编号:DD20160049)、"辽宁1:5万卧龙泉、李家堡子、万福庄、三道沟幅区域地质矿产调查"(编号:DD20160049-7)联合资助。
作者单位
刘文彬 辽宁省地质矿产调查院, 沈阳 110031 
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中文摘要:
      斜哨岩体分布于辽宁南部庄河市木盂山至斜哨一带,岩性主要为中细粒石英闪长岩。岩石LA-ICP-MS锆石U-Pb测年206Pb/238U年龄加权平均值为125.54 Ma±0.39 Ma,形成时代为早白垩世。岩石地球化学特征显示,w(Na2O+K2O)=4.3%~5.6%,里特曼指数σ平均值为1.75,属钙碱系列;铝饱和指数A/CNK平均值为0.84,属准铝型;岩石中微量元素分析显示,富集大离子亲石元素,亏损高场强元素,具有壳源特征;岩石中稀土元素总量平均值为151.01×10-6,稀土元素配分模式右倾,属具不明显铕异常的轻稀土富集、重稀土亏损型;斜哨岩体属于同碰撞科迪勒拉型(Ⅰ型)花岗岩。
英文摘要:
      Xieshao intrusive body occurs in Muyushan-Xieshao area of Zhuanghe city in South Liaoning province.It is lithologically dominated by medium-fine grained diorite.Its weighted average zircon 206Pb/238U age is 125.54 Ma±0.39 Ma thus it was formed in Early Cretaceous epoch.The diorite is geochemically characterized by w(Na2O+K2O)=4.3%~5.6%;calc-alkli series the averaged Riemann index=1.75;quasi-aluminum type,the averaged Al saturation index A/CNK=0.84;crystal derivation,w(ΣREE)=151.01×10-6,indistinct Europium series,REE pattern declined to right,LREE enrichment,HREE depletion,large ion lithophile element enrichment and high field strength element depletion.It belongs to syn-collision Cordillera (Ⅰ) type granite.
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