干旱区生态环境知识资源中心(Arid): Aeromagnetic mapping of fault architecture along Lagos Ore axis, southwestern Nigeria

Arid

DOI	10.1515/geo-2020-0100
	Aeromagnetic mapping of fault architecture along Lagos Ore axis, southwestern Nigeria
	Oladejo, Olagoke Peter 2; Adagunodo, Theophilus Aanuoluwa 1; Sunmonu, Lukman Ayobami 3; Adabanija, Moruffdeen Adedapo 4; Enemuwe, Charity Adaeze 1; Isibor, Patrick Omoregie 5
通讯作者	Adagunodo, Theophilus Aanuoluwa
来源期刊	OPEN GEOSCIENCES
ISSN	2391-5447
出版年	2020
卷号	12 期号:1 页码:376-389
英文摘要	A seismic wave is released when there is sudden displacement on a fault plane. The passage of this wave along the fault plane or within the lithosphere could result in ground shaking or vibration at the surface of the Earth. To provide a geophysical explanation to this phenomenon, the high-resolution aeromagnetic data of the sedimentary terrain and part of the Basement Complex of Southwestern Nigeria were processed and interpreted to provide fault architecture of the area, which could serve as conduit for the passage of seismic energy in the study area. High-resolution aeromagnetic data along the Lagos-Ore axis are processed for fault mapping in the study area. The reduced-to-equator (RTE) residual aeromagnetic data used were enhanced using the total horizontal derivative (THD) and upward continuation (UC) filtering techniques on Oasis Montaj 6.4.2 (HJ) software. The resultant maps were overlaid and compared with the plotted RTE residual maps for relevant interpretations. Varying signatures of magnetic anomalies are grouped into high (57.9-89.1 nT), intermediate (38.2-57.9 nT), and low (4.0-38.2 nT) magnetic intensities, which are associated with contracting basement rocks features. The obtained lineaments from the THD reveal areas of various deformations such as brittle, which is associated with faults/fractures, and ductile deformation, which is associated with folds of geological features. The faults, as depict by the UC map, reveal different depth ranges of 500-2250 m at the western side and 1,500-1,250 m at the northwestern area of the study. Since it has been on record that September 11, 2009, earth tremor of magnitude 4.4, with the epicenter at Allada, Bennin Republic, 128 km west of Lagos, Nigeria occurred within the study area, it can be inferred that the established geologic fault architecture could be responsible for the hazard and be part or synthetic to the Ifewara-Zungeru fault in Nigeria.
英文关键词	magnetic intensity tectonic deformation fault architecture tremor aeromagnetic data
类型	Article
语种	英语
国家	Nigeria
开放获取类型	gold, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000551525100001
WOS关键词	DAHOMEY BASIN ; BENUE TROUGH ; EARTHQUAKE ; GROUNDWATER ; LINEAMENTS ; GRAVITY ; STATE ; FIELD ; AREA
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319718
作者单位	1.Covenant Univ, Dept Phys, Ota, Nigeria; 2.Emmanuel Alayande, Dept Phys, Coll Educ, Oyo, Nigeria; 3.Ladoke Akintola Univ Technol, Dept Pure & Appl Phys, Ogbomosho, Nigeria; 4.Ladoke Akintola Univ Technol, Dept Earth Sci, Ogbomosho, Nigeria; 5.Covenant Univ, Dept Biol Sci, Ota, Nigeria
推荐引用方式 GB/T 7714	Oladejo, Olagoke Peter,Adagunodo, Theophilus Aanuoluwa,Sunmonu, Lukman Ayobami,et al. Aeromagnetic mapping of fault architecture along Lagos Ore axis, southwestern Nigeria[J],2020,12(1):376-389.
APA	Oladejo, Olagoke Peter,Adagunodo, Theophilus Aanuoluwa,Sunmonu, Lukman Ayobami,Adabanija, Moruffdeen Adedapo,Enemuwe, Charity Adaeze,&Isibor, Patrick Omoregie.(2020).Aeromagnetic mapping of fault architecture along Lagos Ore axis, southwestern Nigeria.OPEN GEOSCIENCES,12(1),376-389.
MLA	Oladejo, Olagoke Peter,et al."Aeromagnetic mapping of fault architecture along Lagos Ore axis, southwestern Nigeria".OPEN GEOSCIENCES 12.1(2020):376-389.