Gravity models as tool for basin boundary demarcation: A case study of Anambra Basin, Southeastern Nigeria

Obasi, A. I.; Selemo, A. O. I.; Nomeh, J.S.

doi:10.1016/j.jappgeo.2017.11.002

Cited by 10 publications

(12 citation statements)

References 18 publications

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“…The anomaly of the gravity value must all be corrected to get the Bouguer anomaly value, including the correction of free-air, correction of Bouguer, correction of topography, and correction of tidal, mathematically formulated [5]:…”

Section: B Gravitymentioning

confidence: 99%

The Comparative of Morphological and Gravity Anomaly Lineaments in West Progo Mountains, Indonesia The Comparative of Morphological and Gravity Anomaly Lineaments in West Progo Mountains, Indonesia

Winarti

Sukiyah

Syafri

et al. 2021

Int. J. Adv. Sci. Eng. Inf. Technol.

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In Yogyakarta Special Region, the West Progo Dome comprises the Nanggulan Formation and Old-Andesite Formation as the oldest formations. The Nanggulan Formation is composed of sedimentary rock with a density of 2.5 g/cm3, while the Old-Andesite Formation is composed of volcanic rock with a density of 2.7 g/cm3. Dome morphology is formed by vertical endogenous energy that radiates SE-NW, NE-SW, and E-W. This study aims to describe the correlation between the hill lineaments and gravity anomaly lineaments in the Nanggulan Formation and Old-Andesian Formation. Identification of the hill lineament uses Shuttle Radar Topography Mission (SRTM), while the gravity anomaly lineament uses gravity anomaly map. The standard used in the gravity survey concerning the American Society for Testing and Materials Standard (ASTM). The measurement system utilizes a looping distance of 200-350 meters. The lineaments of the hill and gravity anomaly show the same direction SE-NW. Both lineaments are calculated by fractal dimension (D) utilize the box-counting method. The result of overlaying the two lineaments' fractal dimension produces the same value and the different value. The same fractal dimension value (D=0.81-1.20) indicates whether the hill lineament and gravity anomaly lineament are correlated, while the different fractal dimension values indicate that the two lineaments are not correlated. The fractal dimension value is different due to small intrusions and faults.

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Section: B Gravitymentioning

confidence: 99%

The Comparative of Morphological and Gravity Anomaly Lineaments in West Progo Mountains, Indonesia The Comparative of Morphological and Gravity Anomaly Lineaments in West Progo Mountains, Indonesia

Winarti

Sukiyah

Syafri

et al. 2021

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…Terdapat banyak pendekatan untuk menyelesaikan hal ini, salah satunya menggunakan pemisahan berdasarkan kuadrat terkecil yang sesuai dengan polynomial orde rendah ke bidang yang diamati [28], [29]. Perhitungan polynomial paling efektif dilakukan dibandingkan beberapa perhitungan lainnya [30]. Hasil perhitungan dari anomali residual dari intensitas magnetik total ditampilkan pada Gambar 2b.…”

Section: Hasil Dan Pembahasanunclassified

Delineasi Patahan di Pulau Weh sebagai Perpanjangan The Great Sumatran Fault (GSF) Berdasarkan Data Metode Geomagnetik

et al. 2021

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This research has mapped the active fault of the Seulimeum segment part of the extension of The Great Sumatran Fault (GSF) in the northern as preparation for disaster mitigation. Nevertheless, seismic activity significantly on the Seulimeum segment still has not happened yet. This situation has the potential for a hugely destructive earthquake with a magnitude reaching ~7.4 and also will threaten the Weh island at the northernmost end of the Seulimeum segment even though the Weh island is a settlement, integrated economy area, tourism, trade area, and freeport zone. This study used geophysical methods, i.e., geomagnetic methods, for subsurface investigation. Each distance of 500m data was measured throughout the island using the Proton Precession Magnetometer (PPM) GEM 19 to get 204 total magnetic field data. The correction process (e.g., diurnal and IGRF) is done to get the total intensity of magnetic anomalies. Based on the calculation of residual data and analytical signals from the intensity of total magnetic anomalies, Interpretation found 13 fault distributions around the island with orientation in the northwest-southeast. This result has in agreement with the previous studies. However, this research has did not yet got information about geometry and fault depth. Comprehensive research is needed to complete it.

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“…1a, Obaje, 2009). During the last few decades, due to its high potential for hydrocarbon exploration, the basin has attracted a variety of studies that used a wide range of geological and geophysical methods (Agagu and Adighije, 1983;Cratchley et al, 1984;Benkhelil, 1989;Onwuemesi, 1997;Abbass and Mallam, 2013;Adetona and Abu, 2013;Obiora et al, 2015;Abdullahi and Singh, 2018;Ekwueme et al, 2018;Obasi et al, 2018;Okorie et al, 2019;Oguama et al, 2020). A first power spectrum analysis of magnetic data showed varying thicknesses of sedimentary deposits within the basin between 0.9 and 5.6 km (Onwuemesi, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Similar to Oguama et al (2020), previous studies on the Anambra Basin's lineaments mostly used the delineation magnetic method. In contrast, very few gravity studies are available on the basin (Agagu and Adighije, 1983;Obasi et al, 2018). Therefore, there is a need to determine structural lineaments based on gravity studies to improve the understanding of the subsurface lithologies and determine the sedimentary thickness.…”

Section: Introductionmentioning

confidence: 99%

Structural interpretation of the south-western flank of the Anambra Basin (Nigeria) using satellite-derived WGM 2012 gravity data

Omietimi

Chouhan

Lenhardt

et al. 2021

Journal of African Earth Sciences

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Gravity models as tool for basin boundary demarcation: A case study of Anambra Basin, Southeastern Nigeria

Cited by 10 publications

References 18 publications

The Comparative of Morphological and Gravity Anomaly Lineaments in West Progo Mountains, Indonesia The Comparative of Morphological and Gravity Anomaly Lineaments in West Progo Mountains, Indonesia

The Comparative of Morphological and Gravity Anomaly Lineaments in West Progo Mountains, Indonesia The Comparative of Morphological and Gravity Anomaly Lineaments in West Progo Mountains, Indonesia

Delineasi Patahan di Pulau Weh sebagai Perpanjangan The Great Sumatran Fault (GSF) Berdasarkan Data Metode Geomagnetik

Structural interpretation of the south-western flank of the Anambra Basin (Nigeria) using satellite-derived WGM 2012 gravity data

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