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Title Insights into Afikpo Synclinorium structures: Subsurface analysis and intrusion outlining from airborne magnetic data Author info Chibuike Akpa ... [et al.] Author Akpa Chibuike (25%)
Co-authors Ani Chidiebere Chukwu (10%)
Ekwok Stephen Eguba (10%)
Alzahrani Hassan (10%)
Abdelrahman Kamal (10%)
Andráš Peter 1953- (25%) UMBFP01 - Katedra geografie a geológie
Adelekan Adeyinka (5%)
Eldosouky Ahmed M. (5%)
Source document Journal of African Earth Sciences. No. 218 (2024), pp. 1-17. - Oxford : Elsevier Ltd., 2024 Keywords intruzívne horniny - intrusive rocks uhľovodíky Form. Descr. články - journal articles Language English Country Great Britian Annotation The airborne magnetic data over Afikpo Synclinorium were used to highlight subsurface structures and establish the orientations of tectonic features and their influence on the hydrocarbon play of the area. The characteristic trends of the lineaments were achieved through the center for exploration targeting of grid data analysis. The results of the TMI, residual magnetic field, first vertical, horizontal derivative, Analytic signal, and Tilt angle derivative classified the area into regions of high magnetic intensity observed around the northeastern, southwestern, and central portions of the study area. These areas characterized by anomalous signatures of short magnetic wavelengths delineate shallow magnetic sources. Conversely, regions with medium to low magnetic intensities are characterized by long magnetic wavelengths which indicates deep-seated magnetic source(s) and prospect for hydrocarbon (if other play concepts are emplace); due the thick sediment cover at the southern portion of the area (around, southern part of Nguzu, Ohafia, Biakpan, Abriba and Bende areas). The sediment thickness decreases towards north, west, North-east and north-west (dominated by Benue Trough deposit). Depth to the anomaly sources is of two categories, namely, shallow <1.0 km (dominated by NE trending structures) and deep ≥2.5 km. Ground-truthing confirmed the anomalous zone of high magnetic sources in the northeastern and central regions as Tertiary related tectonic-magmatic intrusion. The most prominent intrusion cuts across Amangwu Edda in Afikpo South through Amaeta-Oziza to Cross River State in a fissure form. This intrusion occurrence conformed to the high magnetic signature identified as a dolerite sill within the Afikpo Sub-basin. It stretches over 16 km in length with an average width of about 1.2 km, having its widest part in the northern parts of Mata Hospital Afikpo. The subsurface topographic model indicated that no fewer than 50% of the study area is characterized by sporadically distributed intrusive rocks. The result revealed several structural lineaments with high lineament density at the northcentral corner of the area trending NE-SW with fault lines (slip fault) perpendicular to it, offsetting the Akpoha, Ibii, Amasiri. and Ozara-ukwu ridges. The major drainage systems across the area followed major structural trends perpendicular to the identified major lineaments, passing through the major regional structural displacement pattern of the Basin. The emplacement of these intrusions might have impacted the hydrocarbon potential of the basin. URL Link na plný text Public work category ADC No. of Archival Copy 54899 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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Title Mapping subsurface structural lineaments using the edge filters of gravity data Author info Luan Thanh Pham, Ahmed M. Eldosouky ... [et al.] Author Pham Luan Thanh (20%)
Co-authors Eldosouky Ahmed M. (20%)
Melouah O. (10%)
Abdelrahman Kamal (10%)
Alzahrani Hassan (10%)
Oliveira Saulo P. (10%)
Andráš Peter 1953- (20%) UMBFP04 - Katedra životného prostredia
Source document Journal of King Saud University - Science. Vol. 33, no. 8 (2021), pp. [1-8]. - Amsterdam : Elsevier B.V., 2021 Keywords gravitačné polia životné prostredie - environment Form. Descr. články - journal articles Language English Country Netherlands Annotation The subsurface structures can be extracted from geophysical studies. This study deals with the detection of lineaments from gravity data that are related to the boundaries of the subsurface structures. The methods used in this study such as the horizontal gradient, total gradient, enhanced horizontal gradient, and improved logistic are tested on synthetic model prior to application to real gravity data. The results indicate that the improved logistic filter can be an effective method for boundary detection of gravity data. 2021 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license URL Link na zdrojový dokument Public work category ADM No. of Archival Copy 50975 Repercussion category OGUNGBEMI, Oluwaseun Samuel - OYEBODE, Kazeem - BADMUS, Ganiyu Olabode - OGUNYEMI, Adebayo Tajudeen. Modeling of structural features from aeromagnetic maps using an improved deep learning technique. In Earth science informatics. ISSN 1865-0473, 2022, vol. 15, no. 4, pp. 2665-2671.
EKKA, Mamuni Sucheeta - SAHOO, Soumyashree Debasis - PAL, Sanjit Kumar - SINGHA ROY, Paresh N. - MISHRA, Om Prakash. Comparative analysis of the structural pattern over the Indian Ocean basins using EIGEN6C4 Bouguer gravity data. In Geocarto international. ISSN 1010-6049, 2022, vol. 37, no. 26, pp. 14198-14226.
HAJI, Taoufik A. - BELKHIRIA, Wajdi - ZAGHDOUDI, Sabrine - GASMI, Mohamed. Structural analysis of the central Tunisian Atlas : implications for salt-related structures and conjugate strike-slip faults. In Journal of African earth sciences. ISSN 1464-343X, 2024, vol. 209, art. no. 105103, pp. 1-13.
KOUIDER, Mohammed Hadj - DAHOU, Mohamed El Amine - NEZLI, Imed Eddine - DEHMANI, Siham - TOUAHRI, Abdeljebar - SÉVERIN, Pistre - ANTONIO, Pulido Bosch. Fractures and lineaments mapping and hydrodynamic impacts on surface and groundwater occurrence and quality in an arid region, Oued M’ya basin-Southern Sahara, Algeria. In Environmental earth sciences. ISSN 1866-6280, 2023, vol. 82, no. 22, pp. 1-28.
SUN, Yanyun - ZENG, Xiangzhi - YANG, Wencai - LI, Xiao - ZHANG, Wan - ZHANG, Xuanjie. Mapping structural lineaments using the edge filters of the potential field : a case study of the Rizhao–Lianyungang area, East China. In Frontiers in earth science. ISSN 2296-6463, 2023, vol. 11, art. no. 1162187, pp. 1-13.
YAKOVLEVA, Alexandra A. - MOVCHAN, Igor B. - MEDINSKAIA, Daria K. - SADYKOVA, Zilya I. Quantitative interpretations of potential fields: from parametric to geostructural recalculations. In Bulletin of the Tomsk Polytechnic University : geo assets engineering. ISSN 2500-1019, 2023, vol. 334, no. 11, pp. 198-215.
JORGE, Vinicius Theobaldo - OLIVEIRA, Saulo Pomponet - PHAM, Luan Thanh - DUONG, Van Hao. A balanced edge detector for aeromagnetic data. In Vietnam journal of earth sciences. ISSN 2615-9783, 2023, vol. 45, no. 3, pp. 326-337.
Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article