| 粤北新洲推覆构造同推覆期岩石体积变化的估算及其地质意义 |
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| 引用本文： | 彭少梅.粤北新洲推覆构造同推覆期岩石体积变化的估算及其地质意义[J].地球科学与环境学报,1994(1). |
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| 作者姓名： | 彭少梅 |
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| 作者单位： | 中国科学院地球化学研究所矿床地球化学开放实验室 |
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| 摘 要： | 非平面应变状态下岩石体积变化的估算，一直是世界上悬而未决的问题。本文初步完善了实用于非平面应变状态下岩石体积变化的计算公式，并用这些公式计算了粤北新洲推覆体同推覆期的岩石体积变化。结果表明，在逆冲推覆时期，整个外来系统普遍发生了强烈的压溶－迁出作用．由此造成的岩石体积损耗平均达２２．８８％。同推覆期外来系统的巨大体耗，与同推覆期含金动力分异热液的形成和演化以及该区石英脉型金矿床成矿物质来源之间有着密切的内在联系．
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| 关 键 词： | 粤北 推覆构造 应变，体积变化 |
ESTIMATING OF THE SYNTHRUSTING VOLUME CHANGES OF ROCK IN THE XINZHON NAPPE STRUCTURE AND ITS GEOLOGICAL SIGNIFICANCE NORTHERN GUANGDONG PROVINCE |
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| Peng Shaomei.ESTIMATING OF THE SYNTHRUSTING VOLUME CHANGES OF ROCK IN THE XINZHON NAPPE STRUCTURE AND ITS GEOLOGICAL SIGNIFICANCE NORTHERN GUANGDONG PROVINCE[J].Journal of Earth Sciences and Environment,1994(1). |
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| Authors: | Peng Shaomei |
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| Abstract: | It is a good question estimate volume's change of rock during deformation metamorphism under nonplane strain untill now in the world. This paper consum mates an effective formula to estimate volume'schange of rock uneder non-plane strain. Then, it is estimated of sguthusting volume's change of rock in theallochthone of the Xinzhou nappe structure using the formula. The estimating results show that the allochthone is commonly subjected to strong pressure solution and mass transfor during the thrusting, whichcouses an average volume less to 22. 88%. There is a close relation between the large sgnthrusting volumeloss of the allochthone and the formation of An-bearing synthrusting tectonosecretion hydrotermal solution,and the origin of ore-forming substances of quartz-vein type gold depoit in this area. |
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| Keywords: | Northern Guangdong province Nappe structure Strain Volume's change gold deposit |
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