气候变化领域集成服务门户(CCPortal): Local Earthquake Tomography at Los Humeros Geothermal Field (Mexico)

CCPortal

DOI	10.1029/2020JB020390
	Local Earthquake Tomography at Los Humeros Geothermal Field (Mexico)
	Toledo T.; Gaucher E.; Jousset P.; Jentsch A.; Haberland C.; Maurer H.; Krawczyk C.; Calò M.; Figueroa A.
发表日期	2020
ISSN	21699313
卷号	125 期号:12
英文摘要	A passive seismic experiment using 25 broadband and 20 short-period stations was conducted between September 2017 and September 2018 at Los Humeros geothermal field, an important natural laboratory for superhot geothermal systems in Mexico. From the recorded local seismicity, we derive a minimum 1-D velocity model and obtain 3-D Vp and Vp/Vs structures of Los Humeros. We improved the classical local earthquake tomography by using a postprocessing statistical approach. Several inversions were computed and averaged to reduce artifacts introduced by the model parametrization and to increase the resolution of the investigated region. Finally, the resulting Vp and Vp/Vs structures and associated seismicity were integrated with newly acquired geophysical and petrophysical data for comprehensive interpretation. The recorded seismicity is mainly grouped in three clusters, two of which seem directly related to exploitation activities. By combining new laboratory measurements and existing well data with our Vp model, we estimate possible geological unit boundaries. One large intrusion-like body in the Vp model, together with neighboring high Vp/Vs anomalies, hints at a region of active resurgence or uplift due to the intrusion of new magma at the northern portion of the geothermal field. We interpret high Vp/Vs features as fluid bearing regions potentially favorable for further geothermal exploitation. Deep reaching permeable faults cutting the reservoir unit could explain fluid flow from a deeper local heat source in the area. © 2020. The Authors.
英文关键词	geothermal exploration; induced and local seismicity; Los Humeros; P and S velocity structure
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187445
作者单位	GFZ German Research Center for Geosciences, Potsdam, Germany; Faculty VI – Planning Building Environment: Institute of Applied Geosciences, TU Berlin, Berlin, Germany; Institute for Applied Geosciences: Geothermal Energy and Reservoir Technology, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany; Institute of Geophysics: Applied and Environmental Geophysics, ETH Zurich, Zurich, Switzerland; Instituto de Geofísica, UNAM, Mexico City, Mexico; Instituto de investigaciones en Ciencias de la Tierra, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
推荐引用方式 GB/T 7714	Toledo T.,Gaucher E.,Jousset P.,et al. Local Earthquake Tomography at Los Humeros Geothermal Field (Mexico)[J],2020,125(12).
APA	Toledo T..,Gaucher E..,Jousset P..,Jentsch A..,Haberland C..,...&Figueroa A..(2020).Local Earthquake Tomography at Los Humeros Geothermal Field (Mexico).Journal of Geophysical Research: Solid Earth,125(12).
MLA	Toledo T.,et al."Local Earthquake Tomography at Los Humeros Geothermal Field (Mexico)".Journal of Geophysical Research: Solid Earth 125.12(2020).