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| 1 | Observation of ultra-microtexture of fault rocks in shearing-sliding zones显示文摘Based on scanning electronic microscopic observation of three fault rocks in ductile-brittle shearing-sliding zones (including one palimpsest mylonite sampled from deep bore cores of Cajon Pass, California, two flowing-structured carbargillites sampled from Shaancan Well 1 located in north Shaanxi, and Well NH located in Huanghai, respectively), micron- and nanometer-scaled ultra-fine grinding grain texture of fault rocks is discovered in this study. And the geological significance of grinding grain texture is discussed in terms of its particulate organization, rheology of particulate slipping, laminar petrography and micro dynamics including dynamothermal metamorphism, fluid transferring, particulate autorotation, and so on. In addition, the remaining problems to be solved and broad prospects in this new study field are also discussed. | SUNYan LUXiancai SHULiangshu GULianxing ZHUWenbin GUOJichun LINAiming | 2005 | Progress in Natural Science:Materials International2005，15，5： | 8 |
| 2 | 大别造山带东缘韧性剪切带中构造岩的构造地球化学分析显示文摘安徽省桐城市挂镇(挂车河镇)地区出露郯庐断裂系(北北东—北东向)和大别构造系(近东西向)的韧性剪切带,变质温度分别为400℃~ 450℃和600 ℃~700℃,均发育镁铁质和长英质构造岩,是研究不同变形条件下岩石中元素活化迁移规律的理想对象.质量平衡计算表明长英质剪切带在韧性变形过程中,大别构造系体积基本不变,郯庐断裂系体积亏损且随变形程度的增强而增加;镁铁质性剪切带在脆—韧变形过程中体积增加.长英质构造岩的稀土和微量元素变异远弱于镁铁质构造岩,长英质构造岩基本继承了原岩的特征而镁铁质构造岩与原岩的差异显著,长英质和镁铁质混合的构造岩主要显示镁铁质组分的迁移规律.长英质构造岩的元素迁移种类和迁移率与变形程度和变质温度正相关,其中体积亏损变形的郯庐断裂系表现为重稀土中等迁出、中稀土几乎未迁移和轻稀土微弱迁入;等体积变形的大别构造系为稀土元素迁入,轻稀土、中稀土和重稀土的迁移率依次增加.镁铁质构造岩的稀土元素迁移表现为轻稀土强烈迁入和重稀土中等迁出.体积变化不是元素变异的主因;在原岩和矿物蚀变制约的基础上,元素迁移受到岩石流变分异作用和热液渗流作用的双重作用,低温时以渗透流体作用为主,而高温时岩石流变分异作用增强. | 李振生 牛浩 田晓莉 张文俊 | 2014 | 地质科学2014，49，2： | 0 |
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