| 浙赣皖相邻地区A_2型花岗岩 |
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| 引用本文： | 姜耀辉,戚建中,刘红樱,王文岗.浙赣皖相邻地区A_2型花岗岩[J].资源调查与环境,1999(1). |
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| 作者姓名： | 姜耀辉 戚建中 刘红樱 王文岗 |
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| 作者单位： | 南京地质矿产研究所 南京210016
(姜耀辉，戚建中，刘红樱)，南京地质矿产研究所 南京210016(王文岗) |
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| 摘 要： | 浙赣皖相邻地区燕山期大茅山、铜山、里山岭、黄山、伏岭等岩体主要由黑云母花岗岩组成，其中斜长石属钠长石和富钠更长石，黑云母呈它形填隙状，结晶晚于浅色矿物。岩石化学成分富ＳｉＯ_２（７３.９２％－７７.５５％）、富碱（Ｎａ_２Ｏ＋Ｋ_２Ｏ为７.８１％～８. ６７％），贫ＣａＯ（０.２６％-０.９２％）、ＭｇＯ（０—０.４５％）；微量元素中富集Ｙ、Ｎｂ、Ｚｒ等ＨＦＳＥ，贫过渡元素及Ｓｒ、Ｂａ；稀土配分曲线呈“海鸥型”。这些特点与区内及华南Ｉ型和Ｓ型花岗岩明显不同，而具有Ａ_２型花岗岩的典型特征。
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| 关 键 词： | A_2型花岗岩 燕山期 浙赣皖相邻地区 |
A_2-TYPE GRANITE IN NEIGHBOURING AREA OF ZHEJIANG-JIANGXI-ANHUI PROVINCES |
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| Jiang Yaohui,Qie Jianzhong,Liu Hongying,Wang Wengang.A_2-TYPE GRANITE IN NEIGHBOURING AREA OF ZHEJIANG-JIANGXI-ANHUI PROVINCES[J].Resources Survey & Environment,1999(1). |
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| Authors: | Jiang Yaohui Qie Jianzhong Liu Hongying Wang Wengang |
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| Abstract: | Damaoshan, Tongshan, Lishanling, Huangshan and Fuling massifs in neighbouring area of Zhejiang-Jiangxi-Anhui provinces mainly consist of biotite granite in which plagioclase is albite or Na-rich oligoclase and biotite is interstitial to feldspars and quartz. Chemical compositions are characterized by high SiO_2 (73.92 % -77.55 % ) , Na_2O K_2O(7. 81 % --8.67% ), Y, Nb, Zr and low CaO(0. 26 % -0. 92 % ), MgO(0 -0.45 % ), Sr, Ba and transition metals. A large negative Eu anomaly has produced a'seagull' REE pattern. The characteristics of above massifs are very different from those observed for I-and S-type granites in studied area and in southern China, but are quite similar to those of A_2-type granites. |
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| Keywords: | A_2-type granite Yanshanian neighbouring area of Zhejiang- Jiangxi Anhui provinces |
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