干旱区生态环境知识资源中心(Arid): Integrated geophysical methods to constrain subsurface structures of Tulu Moye-Bora-Berecha axial volcanic complex, main Ethiopia rift: Implications for geothermal resources

Arid

DOI	10.1016/j.heliyon.2024.e28499
	Integrated geophysical methods to constrain subsurface structures of Tulu Moye-Bora-Berecha axial volcanic complex, main Ethiopia rift: Implications for geothermal resources
	Hilemichaeil, Samson; Haile, Tigistu; Yirgu, Gezahegn
通讯作者	Hilemichaeil, S
来源期刊	HELIYON
EISSN	2405-8440
出版年	2024
卷号	10 期号:7
英文摘要	The Main Ethiopian Rift (MER) is a well-known continental rift whose axial sector is characterized by the occurrence of regularly spaced silicic caldera complexes and central stratovolcanoes, interspersed with large fields of fissural basalts, small mafic scoria cones and numerous young normal faults and fissures. The Tulu Moye-Bora-Berecha volcanic complex is found in the central portion of the MER and includes the Tulu Moye geothermal prospect area. A combination of gravity and magnetic methods was used to better constrain the subsurface volcanic stratigraphy and tectonic structures. Regional and residual anomaly maps were produced from the gravity data and the magnetic data were corrected to produce anomaly and enhanced maps. A complete Bouguer anomaly contour map was produced after the necessary reduction was applied to the gravity data. Due to the geomagnetic field ' s dipolar nature and since the study area is in the equatorial region ( <15(degrees )), the reduced-to-equator (RTE) technique was used to minimize external effects and correct the data as if the body had been laid at the magnetic equator. The anomalous source ' s depth was calculated using a Euler depth solution and spectral analysis approach. Joint 2D forward models on three profiles were developed using GM -SYS of Oasis Montaj software. From the interpretation of the geophysical results, the following conclusions have been reached: (1) the crystalline basement is more raised around Salen ridge and west of it; (2) the main heat source of the geothermal system appears to be a central region of the studied area near Salen ridge and is estimated to be at 4 - 5 km depth, (3) under Gnaro obsidian dome, the basaltic and silicic volcanic horizon is thin, and the deep-seated regional fault serves as the main conduit for the passage of hot fluid to the surface and (4) the gravity and magnetic anomaly plots, regionalresidual maps and enhanced data plots all indicate towards the existence of a major geological feature -a large caldera-comprising of Tulu Moye, Bora and Berecha volcanic centers.
英文关键词	Main Ethiopia rift system 2D forward model Spectral analysis Euler depth solution Reduced-to-equator
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001225206900001
WOS关键词	EULER DECONVOLUTION ; AMARO HORST ; GRAVITY ; EVOLUTION ; FIELD ; REDUCTION ; TECTONICS ; GEOLOGY ; SECTOR ; AFAR
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404024
推荐引用方式 GB/T 7714	Hilemichaeil, Samson,Haile, Tigistu,Yirgu, Gezahegn. Integrated geophysical methods to constrain subsurface structures of Tulu Moye-Bora-Berecha axial volcanic complex, main Ethiopia rift: Implications for geothermal resources[J],2024,10(7).
APA	Hilemichaeil, Samson,Haile, Tigistu,&Yirgu, Gezahegn.(2024).Integrated geophysical methods to constrain subsurface structures of Tulu Moye-Bora-Berecha axial volcanic complex, main Ethiopia rift: Implications for geothermal resources.HELIYON,10(7).
MLA	Hilemichaeil, Samson,et al."Integrated geophysical methods to constrain subsurface structures of Tulu Moye-Bora-Berecha axial volcanic complex, main Ethiopia rift: Implications for geothermal resources".HELIYON 10.7(2024).