使用环境地震噪声进行3D内在减弱断层扫描,应用于加拿大加那利群岛的拉帕尔马岛
Iván Cabrera-Pérez1,2, Luca D'Auria3,4, Jean Soubestre5,6
1Instituto Volcanológico de Canarias (INVOLCAN), Granadilla de Abona, 38600, Spain. Ivan.Cabrera-Perez@unige.ch.
Scientific reports
|November 9, 2024
概括
这项研究揭示了拉帕尔马的高地震减弱区域,表明了潜在的地热水库. 环境噪声减弱断层扫描 (ANAT) 有效地绘制了这些富含流体的区域,用于地热勘探.
科学领域:
- 地质物理学 地质物理学
- 火山学 火山学是一门学科.
- 地热能源 地热能源
背景情况:
- 拉帕尔马岛表现出高火山活动,这表明有很大的地热潜力.
- 识别活跃的地热储对于可持续能源勘探至关重要.
研究的目的:
- 为了创建一个3D图像的地震本质减弱在拉帕尔马.
- 通过使用环境地震噪声,识别可能与活跃的地热水库相关的异常.
主要方法:
- 开发和应用一种新的环境噪声减弱断层扫描 (ANAT) 技术.
- 通过使用环境地震噪声,在5公里深度以3D形式成像地震内在衰减.
- 雷利波代码的分析,以评估流体的灵敏度.
主要成果:
- 在拉帕尔马南部地区确定两个高衰减区域.
- 一个异常与Cumbre Vieja火山综合体下方的热水变化相关.
- 第二个异常表明,大量破碎的岩石促进了加热液体的循环.
结论:
- 内在衰减对流体比速度更敏感,这是地热系统的关键指标.
- ANAT是识别潜在的地热水库的宝贵工具.
- 发现的异常需要进一步调查拉帕尔马的地热资源潜力.
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