| 红河断裂带类微生物状纳米颗粒的发现及其构造意义 |
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| 引用本文： | 蔡周荣,卢丽娟,黄强太,李建峰,肖阳,杨鹏,陆杏欣,张程,黎雨晗.红河断裂带类微生物状纳米颗粒的发现及其构造意义[J].大地构造与成矿学,2021,45(2):270-279. |
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| 作者姓名： | 蔡周荣 卢丽娟 黄强太 李建峰 肖阳 杨鹏 陆杏欣 张程 黎雨晗 |
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| 作者单位： | 中山大学 海洋科学学院, 广东 珠海 519082;南方海洋科学与工程广东省实验室(珠海), 广东 珠海 519082;中国科学院 南海海洋研究所, 边缘海与大洋地质重点实验室, 广东 广州 510301;中国科学院 广州地球化学研究所, 同位素地球化学国家重点实验室, 广东 广州 510640 |
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| 基金项目： | 国家自然科学基金项目;广东省自然基金项目 |
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| 摘 要： | 通过扫描电镜(SEM)观察,首次在红河断裂带内的花岗糜棱岩中发现类微生物状纳米颗粒。高分辨率平插能谱分析结果表明,该类微生物状纳米颗粒成分中的C元素平均含量约为10%,指示无机成因,并非某些菌类微生物,结合XRD分析结果表明该类纳米颗粒成分来自花岗糜棱岩的造岩矿物。通过对各种形貌特征的纳米颗粒观察、筛查和规律分析,探讨了类微生物状纳米颗粒的形成机理及构造意义,认为其形成过程可以分为岩石破裂形成球粒状纳米颗粒、球粒状纳米颗粒粘聚形成片状、片状纳米颗粒卷曲成管状以及管状纳米颗粒脱落聚集四个阶段,其中后三个阶段为纳米颗粒的后生构造变形阶段,指示红河断裂带构造环境的多期次变化。断裂带内球粒状纳米颗粒可能是在宏观构造应力场作用下的最小变形产物,其结构或变形特征蕴含丰富的宏观构造活动信息,是传统构造地质学研究方法之外的新思路和新手段。
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| 关 键 词： | 纳米颗粒 红河断裂带 成分分析 形成机理 构造意义 |
Discovery of Microbial-like Nanoparticles in the Red River Fault Zone and Its Tectonic Significance |
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| CAI Zhourong,LU Lijuan,HUANG Qiangtai,LI Jianfeng,XIAO Yang,YANG Peng,LU Xingxin,ZHANG Cheng,LI Yuhan.Discovery of Microbial-like Nanoparticles in the Red River Fault Zone and Its Tectonic Significance[J].Geotectonica et Metallogenia,2021,45(2):270-279. |
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| Authors: | CAI Zhourong LU Lijuan HUANG Qiangtai LI Jianfeng XIAO Yang YANG Peng LU Xingxin ZHANG Cheng LI Yuhan |
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| Institution: | (School of Marine Sciences,Sun Yat-sen University,Zhuhai 519082,Guangdong,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,Guangdong,China;CAS Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,Guangdong,China;State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China) |
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| Abstract: | Recently,microbial-like nanoparticles were firstly found in the granitic mylonite in the Red River Fault zone through Scanning Electron Microscopy observation.High-resolution Energy Spectrum analyses showed that the microbial-like nanoparticles contain about 10%carbon,which indicates they were formed by inorganic process rather than fungi.These findings,together with the XRD results revealed that the microbial-like nanoparticles were derived from the rock-forming minerals of the granite mylonite.Moreover,a large number of nanoparticles with various morphological features were observed and analyzed,and the formation mechanism and tectonic significance of microbial-like nanoparticles were discussed.The formation process of the microbial-like nanoparticles can be divided into four stages,which including the formation of granular nanoparticles when the rock fracture,the aggregation of granular nanoparticles to form the sheet-like nanoparticles,the process of tubular nanoparticles curled from sheet-like nanoparticles,and the shedding and aggregation of tubular nanoparticles.The later three formation stages of the microbial-like nanoparticles are the tectonic deformation stages of the nanoparticles,indicating multiple changes in the tectonic setting of the Red River Fault zone.The granular nanoparticles in the fault zone may be the smallest deformation products under the macroscopic tectonic stress field.The structure or deformation characteristics contain rich information of the macroscopic tectonic activities,which will shed lights on investigations of the traditional tectonic geologic issues. |
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| Keywords: | nanoparticles the Red River Fault zone component analysis formation mechanism tectonic significance |
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