Syn- and postkinematic cement textures in fractured carbonate rocks: Insights from advanced cathodoluminescence imaging
Syn- and postkinematic cement textures in fractured carbonate rocks: Insights from advanced cathodoluminescence imaging
复制标题
裂隙碳酸盐岩中的同步和后运动胶结物结构：来自先进阴极发光成像的见解
DOI：
10.1016/j.tecto.2016.05.001
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发表时间：
2016
期刊：
影响因子：
2.9
通讯作者：
S. Laubach
中科院分区：
文献类型：
--
作者：
E. Ukar;S. Laubach
在裂缝中的方解石和白云岩矿床中，透射光和光学阴极发光方法可以检测到一些裂缝中的裂缝密封结构，但基于扫描电子显微镜的阴极发光（SEM-CL）结合二次电子图像和元素图，可以揭示裂缝密封和水泥生长结构，而以前的SEM-CL成像方法只能发现块状或无特征的矿床。在一系列碳酸盐岩裂缝中，方解石和白云石胶结物在裂缝生长期间和之后的沉积模式和结构与砂岩裂缝中石英的复杂聚集模式相似，表明裂缝中碳酸盐岩矿物和石英矿床之间的一些明显差异反映了以往成像方法的局限性。裂缝中广泛分布的碳酸盐矿床结构圈定的进展为裂缝孔隙度的生长和闭塞提供了证据。
In calcite and dolomite deposits in fractures, transmitted light and optical cathodoluminescence methods detect crack-seal texture in some fractures, but scanning electron microscope-based cathodoluminescence (SEM-CL) combined with secondary-electron images and element maps, reveals crack-seal and cement growth textures where previous SEM-CL imaging methods found massive or featureless deposits. In a range of fractured carbonate rocks, patterns and textures of calcite and dolomite cements precipitated during and after fracture growth resemble complex accumulation patterns found in quartz in sandstone fractures, suggesting that some apparent differences between carbonate mineral and quartz deposits in fractures reflect the limits of previous imaging methods. Advances in delineating textures in widespread carbonate mineral deposits in fractures provide evidence for growth and occlusion of fracture porosity.