| 贡山地区两类特殊的区域动力热流变质作用 |
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| 引用本文： | 严城民,王辉.贡山地区两类特殊的区域动力热流变质作用[J].云南地质,2001,20(2):119-127. |
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| 作者姓名： | 严城民 王辉 |
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| 作者单位： | 云南省地质矿产勘查开发局区域地质调查队,云南,玉溪,653100 |
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| 基金项目： | 中国地质调查局,云南三江造山带及非史密斯地层区1:25万区域地质填图方法研究. |
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| 摘 要： | 贡山地区存在两类特殊的区域动力热变质作用－低压热轴型、减压增温型。其共同特征是：具明显的递增变质现象，以地幔热流上升为主要因素，构造背景为碰撞造山。不同之处为：低压热轴型区域动力热流变质，形成于低压环境，变质岩石的分布与断裂、剪切带无明显关系；减压增温型区域动力热流变质，形成于中低压环境，变质岩石受韧性剪切带控制呈间隔带状出露。
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| 关 键 词： | 区域动力热流变质作用 “三江”造山带 贡山地区 韧性剪切带 变质岩 |
| 文章编号： | 1004-1885(2001)02-0119-09 |
| 修稿时间： | 2000年11月29 |
TWO TYPES OF SPECIAL REGIONAL DYNAMOTHERMAL METAMORPHISM IN GONGSHAN MOUNTAIN AREA |
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| YAN Cheng min,WANG Hui.TWO TYPES OF SPECIAL REGIONAL DYNAMOTHERMAL METAMORPHISM IN GONGSHAN MOUNTAIN AREA[J].Yunnan Geology,2001,20(2):119-127. |
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| Authors: | YAN Cheng min WANG Hui |
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| Abstract: | There are two types of special regional dynamothermal metamorphism in the Gongshan Mountain area,ie,low P hot axis type and P decrease T increase type.Their general characteristics are of obvious progressive metamorphism,with the heat flow from mantle as the essential factor and a collision orogenic belt to be the tectonic setting.The differences between them are as follows.The former is formed in a low P environment and the distribution of metamorphic rocks is not clearly related to the fault,shear zone.Otherwise,the latter is in a mid low P environment and the metamorphic rocks are controlled by the ductile shear belt. |
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| Keywords: | Regional Dynamothermal Metamorphism Sanjiang Orogenic Belt Gongshan Mountain Area |
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