Spatial association analysis between hydrocarbon fields and sedimentary residual magnetic anomalies using Weights of Evidence: An example from the Triassic Province of Algeria

Allek, Karim; Boubaya, Djamel; Bouguern, Abderrahmane; Hamoudi, Mohamed

doi:10.1016/j.jappgeo.2016.09.026

Cited by 9 publications

(6 citation statements)

References 17 publications

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“…The WofE method offers a quantitative measurement of spatial association between a given geological feature and target occurrences, e.g., mineral deposits, prospects, or geological anomalies [44].…”

Section: Weights Of Evidence Methodsmentioning

confidence: 99%

Joint Application of Fractal Analysis and Weights-of-Evidence Method for Revealing the Geological Controls on Regional-Scale Tungsten Mineralization in Southern Jiangxi Province, China

et al. 2017

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Abstract:The Southern Jiangxi Province (SJP) hosts one of the best known districts of tungsten deposits in the world. Delineating spatial complexities of geological features and their controls on regional-scale tungsten mineralization by using an integrated fractal and weights-of-evidence (WofE) method can provide insights into the understanding of ore genesis and facilitate further prospecting in this area. The box-counting fractal analysis shows that most of the tungsten occurrences are distributed in regions with high fractal dimensions of faults and fault intersections, suggesting ore-forming favorability of areas with highly complex structural patterns. The WofE-derived indices are employed to quantitatively measure the controls of analyzed features on mineralization, which illustrate that tungsten anomalies, faults, Yanshanian granites, and manganese anomalies have high contrast values, implying a spatially strong correlation of these features with tungsten occurrences. In particular, high manganese anomalies in host rock may provide a novel indication for mineral prospecting in this area. A predictive map is extracted based on the combination of fractal and WofE results, providing intuitive guides for future prospectivity in this area. Regions identified by high posterior probability in conjunction with high fractal dimensions of both faults and fault intersections are evaluated as the most favorable targets.

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Section: Weights Of Evidence Methodsmentioning

confidence: 99%

Joint Application of Fractal Analysis and Weights-of-Evidence Method for Revealing the Geological Controls on Regional-Scale Tungsten Mineralization in Southern Jiangxi Province, China

et al. 2017

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“…Pristane Phytane TOC values > 4%, reservoir temperature values > 70 °C, and magnetic anomalies on the EMAG2 maps ranging from -100 to 100 nT. In addition, scientists note the relationship of magnetic anomalies (magnetic anomalies are formed due to geomagnetic pole reversals) with hydrocarbon fields [48]. Figure 8 shows a relationship between the oil-and-gas deposits and the magnetic anomalies.…”

Section: C) ‰ -20 N-c-10 N-c-11 N-c-12 N-c-13 N-c-14 N-c-15 N-c-16 N-...mentioning

confidence: 99%

“…Allek et al [48] note that the degree of the established positional connection between the hydrocarbon deposits and the delineated sedimentary residual magnetic anomalies increases considerably with a certain class of anomalies, suggesting that the areas where they subsequently manifest themselves comprise more hydrocarbon deposits than one could expect it by chance. From a geological perspective, those authors associate is with the migration of magnetic minerals, but one cannot rule out the assumption that the magnetic anomalies stem from the geomagnetic reversals.…”

Section: C) ‰ -20 N-c-10 N-c-11 N-c-12 N-c-13 N-c-14 N-c-15 N-c-16 N-...mentioning

confidence: 99%

“…There is no absolute tectonic quiescence-it means that the microfriction of rocks in sites of tectonic faults occurs constantly. The literature red polygons represent the gas fields, and green polygons represent the oil fields [48]. International Journal of Geophysics has sufficient reports that confirm the occurrence of electromagnetic emission when rocks rub on each other [55][56][57].…”

Section: C) ‰ -20 N-c-10 N-c-11 N-c-12 N-c-13 N-c-14 N-c-15 N-c-16 N-...mentioning

confidence: 99%

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Controversial Issues of Hydrocarbon Field Formation and the Role of Geomagnetic Fields

Ponomarev

Kadyrov

Vaganov

et al. 2022

International Journal of Geophysics

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This review paper presents controversial issues on the formation of hydrocarbon deposits. We look into the geological contradictions of the abiogenic and biogenic theories of petroleum origin, indicating the connection between hydrocarbon deposits and disjunctive dislocations, as well as present disputes about the geological period over which hydrocarbon deposits have been formed. We further overviewed the radical chain mechanism of hydrocarbon generation from organic matter as proposed by Prof. Nesterov. It is noted that the petroleum generation process in reservoir conditions occurs almost instantly in the presence of discrete geomagnetic fields and does not require a long geological time. This is explained by spin magnetic effects (spin catalysis, magnetic isotope properties). We briefly highlight the effect of magnetic fields on chemical reactions involving organic compounds and the use of magnetic fields to enhance oil recovery. We also present the leading causes of discrete magnetic fields in the sedimentary cover: Earth’s geomagnetic reversals, generation of ferromagnetic minerals in oil deposits, electromechanical effects of rock friction near faults, and intermixing of reservoir waters with different mineralization (spontaneous ion polarization). Based on the material reported, we conclude that the radical chain mechanism of petroleum generation processes explains some contradictions of the abiogenic and biogenic theories of petroleum origin. Elaborating this research area has excellent prospects for developing new criteria for hydrocarbon prospecting and devising innovative methods to enhance the oil recovery for shale oil production.

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“…The WofE analysis is a data-driven Bayesian statistical method that offers a quantitative measurement of spatial association between a set of given geological features and the target occurrences (e.g., mineral deposits, prospects or geological anomalies) [58,59].…”

Section: Weights Of Evidence (Wofe) Analysismentioning

confidence: 99%

Structural Controls on Copper Mineralization in the Tongling Ore District, Eastern China: Evidence from Spatial Analysis

Sun

et al. 2018

Minerals

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Structures exert significant controls on hydrothermal mineralization, although such controls commonly have cryptic expression in geological datasets dominated by 2D maps. Analysis of spatial patterns of mineral deposits and quantification of their correlation with detailed structural features are beneficial to understand the plausible structural controls on mineralization. In this paper, a series of GIS-based spatial methods, including fractal, Fry, distance distribution and weights-of-evidence analyses, were employed to reveal structural controls on copper mineralization in the Tongling ore district, eastern China. The results indicate that Yanshanian intrusions exert the most significant control on copper mineralization, followed by EW-trending faults, intersections of basement faults and folds. The scale-variable distribution patterns of copper occurrences are attributed to the different structural controls operating in the basement and sedimentary cover. In the basement, EW-trending faults serve as pathways for channeling Yanshanian magma from a deep magma chamber to structurally controlled trap zones in the caprocks, imposing an important regional control on the spatial distribution of Cretaceous magmatic-hydrothermal system genetically related to copper mineralization. In the sedimentary cover, bedding-parallel shear zones, formed during the progressive folding and shearing in Indosinian and overprinted by tensional deformation in Yanshanian, act as favorable sites for hosting, focusing and depositing the ore-bearing fluids, playing a vital role in the localization of stratabound deposits at fine scale.

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Spatial association analysis between hydrocarbon fields and sedimentary residual magnetic anomalies using Weights of Evidence: An example from the Triassic Province of Algeria

Cited by 9 publications

References 17 publications

Joint Application of Fractal Analysis and Weights-of-Evidence Method for Revealing the Geological Controls on Regional-Scale Tungsten Mineralization in Southern Jiangxi Province, China

Joint Application of Fractal Analysis and Weights-of-Evidence Method for Revealing the Geological Controls on Regional-Scale Tungsten Mineralization in Southern Jiangxi Province, China

Controversial Issues of Hydrocarbon Field Formation and the Role of Geomagnetic Fields

Structural Controls on Copper Mineralization in the Tongling Ore District, Eastern China: Evidence from Spatial Analysis

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