| 苗儿山花岗岩体单元—超单元特征及其定位机制 |
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| 引用本文： | 李福顺,周厚祥.苗儿山花岗岩体单元—超单元特征及其定位机制[J].湖南地质,2002,21(1):20-25. |
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| 作者姓名： | 李福顺 周厚祥 |
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| 作者单位： | 湖南省地质调查院湘中矿产地质调查所 湖南娄底417000
(李福顺)，湖南省地质调查院湘中矿产地质调查所 湖南娄底417000(周厚祥) |
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| 摘 要： | 根据苗儿山花岗岩体单元－超单元新理论将苗儿岩体划分为13个单元，归并为两个超单元，两个独立单元。不同单元、超单元的性质特征揭示了不同构造期古老岩石重熔的岩浆，沿北东向基底断裂上侵在隆起核部冷凝成岩的演化规律。雪峰期形成猫儿界单元线浅成相裂隙喷溢型火山岩；加里东期以NE向基底断裂的中心式扩展定位形成中深成相黄金超单元主体，自中心往外，岩体由新至老分布；印支－燕山期延续 了加里东期岩浆活动特征；因环状裂隙影响，印支期光旺岭单元侵入体总体呈NE向展布，且以加里东期岩浆侵位中心呈半环状排列；燕山期八角亭超单元3个NE向带，是岩浆呈岩墙式扩张定位的具体表现。
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| 关 键 词： | 苗儿山花岗岩体单元－超单元 重熔岩浆 NE向基底断裂 中心式扩展定位 定位机制 |
THE CHARACTERISTICS AND ITS FIXED POSITION MECHANISM OF GRANITE UNIT AND SUPER-UNIT OF MIAOER MOUNTAIN |
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| LI Fu-shunZHOU Hou-xiang,.THE CHARACTERISTICS AND ITS FIXED POSITION MECHANISM OF GRANITE UNIT AND SUPER-UNIT OF MIAOER MOUNTAIN[J].Hunan Geology,2002,21(1):20-25. |
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| Authors: | LI Fu-shunZHOU Hou-xiang |
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| Abstract: | According to the new theories of granite unit and super-unit, the magmatic body of Miaoer Mountain is divided into 13 units, which is merged to two super-units and two independent units. Thegeologic characteristics of different unit and super-units announce that the evolving regulation of re-melt magna of ancient rock in different structure period condensed into rock in the core of hunch by approaching upwards from the basement fault along NE trend. Volcano rock of Miaoerjie unit of spray and overflow type by shallow growing was formed in Xufeng Period; Wangjin super-unit body, by middle or deep growing of expansion position from center of floor fault of NE trend in CaledonianPeriod, was distributed by newly to oldly, from center to outside. Characteristic of magma movement was continued from Caledonian Period to Indonian-Yenshan Period; irruptive magma bodyof Guangwan Mountain in Indonian Period generally spread out toward NE by the influence of ring-shape fault, and was arrayed in half-ring from the center of irruptive magma of Caledonian Period. 3 NE orientated zones of Bajiaoting in Yenshan Period are the concrete performance of expansive magma position in the form of rock-wall. |
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| Keywords: | Granite unit and super-unit Remelting magma Basement fault of NE trend Expansive position by center style |
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