| 鄂东南小岩体分布及其基本特征 |
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| 引用本文： | 刘晓妮,孔繁河,杨培,刘忠明,朱琳,李红. 鄂东南小岩体分布及其基本特征[J]. 资源环境与工程, 2009, 23(4): 390-395 |
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| 作者姓名： | 刘晓妮 孔繁河 杨培 刘忠明 朱琳 李红 |
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| 作者单位： | 湖北省地质科学研究所,湖北,武汉,430022;湖北省第二地质大队,湖北,恩施,445000 |
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| 摘 要： | 鄂东南燕山期小岩体(群)有137处,主要分布在两大层间顺层滑脱拆离带中和毛铺-两剑桥断裂及其附近.小岩体规模小,埋藏浅,形态多为筒状、似直立柱体、蘑菇状、脉状、岩株状、岩墙状.小岩体产状总体倾向南、南东,倾角30°以上.鄂东南小岩体主要为中酸性花岗岩类,侵入期次分为两期七次.岩浆演化从早到晚的趋势为:闪长岩、石英闪长岩、石英二长闪长玢岩、花岗闪长斑岩、花岗斑岩、石英斑岩.部分小岩体与鄂东南六大岩体一样是杂岩体,是岩浆多期次演化的产物.小岩体岩浆来源于深部,与太平洋板块向欧亚板块俯冲作用有关.
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| 关 键 词： | 小岩体 基本特征 鄂东南 |
Distribution and Basic Characteristics of Small Intrusions in Southeast Hubei |
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| LIU Xiaoni,KONG Fanhe,YANG Pei,LIU Zhongming,ZHU Lin,LI Hong. Distribution and Basic Characteristics of Small Intrusions in Southeast Hubei[J]. Resources Environment & Engineering, 2009, 23(4): 390-395 |
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| Authors: | LIU Xiaoni KONG Fanhe YANG Pei LIU Zhongming ZHU Lin LI Hong |
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| Affiliation: | 1.Hubei Institute of Geosciences;Wuhan;Hubei 430022;2.The 2nd Geological Party;Enshi;Hubei 445000 |
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| Abstract: | Small intrusions are distributed mainly in detachment structure zone between two layers,Maopu-Liangjianqiao fault and its neighbourhood in phase of Yanshan in Southeast Hubei.Small intrusions are small size,shallow buried in the form of cylinder-shape,vein,mushroom-shape,stock and dike,the attitude of small intrusions in general tend to south and southeast with a dip angle of above thirty degrees.Magma evolution trends from early to late:diorite,quartz diorite,quartz monzobiorite,granodiorite-porphyry,grani... |
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| Keywords: | small intrusions basic characteristics southeast Hubei |
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