The northeastern Algeria hydrothermal system: gravimetric data and structural implication

Geothermal Energy

Research

Boualem Bouyahiaoui¹  Said Maouche¹  Abdeslam Abtout¹  Mohamed Cherif Berguig²  Yasser Bayou³  Saeed Vatankhah⁴  Rosemary A. Renaut⁵ 

[1] CRAAG, Research Center of Astronomy, Astrophysics and Geophysics, BP 63 Bouzaréah, 16340, Algiers, Algeria;FSTGAT, University of Science and Technology Houari Boumediene, BP 32, El-Alia Bab Ezzouar, 16111, Algiers, Algeria;FSTGAT, University of Science and Technology Houari Boumediene, BP 32, El-Alia Bab Ezzouar, 16111, Algiers, Algeria;CRAAG, Research Center of Astronomy, Astrophysics and Geophysics, BP 63 Bouzaréah, 16340, Algiers, Algeria;Institute of Geophysics, University of Tehran, District 6, Tehran, Tehran, Iran;School of Mathematical and Statistical Sciences, Arizona State University, Tempe, AZ, USA;

关键词: Northeastern Algeria;    Hydrothermal system;    Gravimetric data;    3D gravity model;   

DOI  :  10.1186/s40517-023-00258-2

 received in 2022-08-29, accepted in 2023-05-08,  发布年份 2023

来源: Springer

【 摘 要 】

The Tell Atlas of Algeria has a huge potential for hydrothermal energy from over 240 thermal springs with temperatures up to 98∘\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$98^\circ$$\end{document} C in the Guelma area. The most exciting region is situated in the northeastern part which is known to have the hottest hydrothermal systems. In this work, we use a high-resolution gravity study to identify the location and origin of the hot water, and how it reaches the surface. Gravimetric data analysis shows the shapes of the anomalies arising due to structures at different subsurface depths. The calculation of the energy spectrum for the data also showcases the depths of the bodies causing anomalies. 3D-Euler deconvolution is applied to estimate the depths of preexisting tectonic structures (faults). These preprocessing steps assist with assessing signal attenuation that impacts the Bouguer anomaly map. The residual anomaly is used in a three-dimensional inversion to provide a subsurface density distribution model that illustrates the locations of the origin of the dominant subsurface thermal systems. Overall, the combination of these standard processing steps applied to the measurements of gravity data at the surface provides new insights about the sources of the hydrothermal systems in the Hammam Debagh and Hammam Ouled Ali regions. Faults that are key to the water infiltrating from depth to the surface are also identified. These represent the pathway of the hot water in the study area.

【 授权许可】

CC BY   
© The Author(s) 2023

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