华南沿海地区白垩纪花岗岩多期构造裂缝发育特征及其对潜山勘探的指示
孙侨阳 , 邓洪旦 , 纪沫 , 龚俊峰 , 董方 , 孙思瑶 , 王云龙 , 于志泉
地球科学 ›› 2024, Vol. 49 ›› Issue (07) : 2570 -2588.
华南沿海地区白垩纪花岗岩多期构造裂缝发育特征及其对潜山勘探的指示
Characteristics of Multi-Phase Fracture Development in Cretaceous Granite from Coastal Region of South China and Its Implications for Buried-Hill Exploration
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裂缝的分布特征对花岗岩储层研究具有重要作用.结合无人机遥感技术和野外调查对华南沿海地区白垩纪花岗岩露头的构造裂缝进行数字化识别和定量研究.分析表明:研究区主要发育NE20°~40°和SE100°~140°两组裂缝,NE向裂缝形成时间早于SE向;多期构造变形会显著提高裂缝网络的连通度和面密度,连通度高值区广泛分布,面密度高值区集中分布在辉绿岩脉侵入区和断裂带内部;构造裂缝网络的线密度、面密度和连通度与断裂带规模呈正相关.构建了华南沿海地区白垩纪花岗岩多期构造裂缝的发育模式,指出断裂带和辉绿岩脉侵入区等裂缝交汇部位有利于形成优势储层,为海域花岗岩潜山的勘探开发提供重要指示.
花岗岩储层 / 构造裂缝 / 裂缝网络 / 无人机遥感 / 拓扑几何分析 / 构造地质学.
granite reservoir / structural fracture / fracture network / unmanned aerial vehicle remote sensing / topological geometric analysis / structural geology
附录见本刊官网(http://www.earth-science.net).
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国家自然科学基金面上项目(42272234)
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