| 安基山岩体的对流作用和结晶作用 |
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| 引用本文： | 毛建仁,苏郁香,陈三元,赵曙良,程启芬.安基山岩体的对流作用和结晶作用[J].岩石学报,1987,3(4). |
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| 作者姓名： | 毛建仁 苏郁香 陈三元 赵曙良 程启芬 |
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| 作者单位： | 中国地质科学院南京地质矿产研究所 南京 |
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| 摘 要： | 不对称相带的安基山石英闪长玢岩—花岗闪长斑岩侵入体的形成,是浅部岩浆房内对流循环作用的结果,岩浆由顶部向下、边部向里逐渐固结成岩,成岩过程中无明显重力分离。由于岩浆体间歇性上升,早期结晶尚未固结的角闪石英闪长玢岩岩墙,晚期沿着冷却边缘裂隙定位,最后为似斑状花岗闪长岩固结。岩体具水平分带和垂直分带。斜长石的韵律环带反映了在超冷却作用或对流循环过程中发生的组分变化。
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| 关 键 词： | 岩体相带 斜长石 对流循环 江苏 |
CONVECTION AND CRYSTALLIZATION IN THE ANJISHAN INTRUSIVE BODY, JIANGSU PROVINCE |
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| Mao Jianren Su Youxiang Chen Sangyuan Zhao Shuliang Cheng Qifen.CONVECTION AND CRYSTALLIZATION IN THE ANJISHAN INTRUSIVE BODY, JIANGSU PROVINCE[J].Acta Petrologica Sinica,1987,3(4). |
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| Authors: | Mao Jianren Su Youxiang Chen Sangyuan Zhao Shuliang Cheng Qifen |
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| Abstract: | It is suggested that the asymmetric Anjishan quartz-diorite porphyrite-granodiorite porphyry intrusive body developed as a result of covectional circulation in the magma chamber during the consolidation of the quartz-diorite porphyrite outer facies bearing xenoliths. Because of the intermittent uprise of magma, hornblendequartz-diorite porphyrite dyke, which early crystallized, but failed to consolidate, was emplaced later along chilled margin's fractures. Porphyritic granodiorite eventually consolidated. A series of dykes provides information concerning the degree of crystallization of magma that existed in the intrusive body during the final stages of its emplacement and consolidation. The oseillating and embayed zones in plagio clases can be explained by constitutional supercooling or by changes during the convection. |
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| Keywords: | Facies of body Plagioclass Convectional circulation Jiangsu |
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