Anatomy of Old Faithful From Subsurface Seismic Imaging of the Yellowstone Upper Geyser Basin
Anatomy of Old Faithful From Subsurface Seismic Imaging of the Yellowstone Upper Geyser Basin
复制标题
根据黄石上间歇泉盆地地下地震成像对老忠实泉的解剖
DOI：
10.1002/2017gl075255
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发表时间：
2017
影响因子：
5.2
通讯作者：
Robert B. Smith
中科院分区：
文献类型：
--
作者：
Sin‐Mei Wu;K. Ward;J. Farrell;F. Lin;M. Karplus;Robert B. Smith
黄石国家公园的上间歇泉盆地是地球上热液分布最集中的盆地之一，其中包括标志性的老忠实间歇泉。尽管几十年来该系统一直是许多地质、地球化学和地球物理研究的焦点，但浅层（<200 m）地下结构的特征仍然很少。为了研究包括上间歇泉盆地热液管道在内的详细地下地质结构，我们于 2015 年 11 月部署了一系列密集分布的三分量节点地震仪。在这项研究中，我们利用附近活动热液特征激发的非扩散地震波提取 1 至 10 Hz 之间的瑞利波地震信号，得到以下结果：(1) 利用静止热液活动作为震源对浅层地下结构进行成像，(2) 表征当地地质条件如何控制老忠实泉热液系统的形成和位置，以及 (3) 解决位于老忠实间歇泉西南约 100 m 处的相对较浅（10-60 m）的大型水库。
The Upper Geyser Basin in Yellowstone National Park contains one of the highest concentrations of hydrothermal features on Earth including the iconic Old Faithful geyser. Although this system has been the focus of many geological, geochemical, and geophysical studies for decades, the shallow (<200 m) subsurface structure remains poorly characterized. To investigate the detailed subsurface geologic structure including the hydrothermal plumbing of the Upper Geyser Basin, we deployed an array of densely spaced three‐component nodal seismographs in November of 2015. In this study, we extract Rayleigh wave seismic signals between 1 and 10 Hz utilizing nondiffusive seismic waves excited by nearby active hydrothermal features with the following results: (1) imaging the shallow subsurface structure by utilizing stationary hydrothermal activity as a seismic source, (2) characterizing how local geologic conditions control the formation and location of the Old Faithful hydrothermal system, and (3) resolving a relatively shallow (10–60 m) and large reservoir located ~100 m southwest of Old Faithful geyser.