Determination of subsurface lineaments in the Hoang Sa islands using enhanced methods of gravity total horizontal gradient

Thanh, Luan Pham; Öksüm, Erdinç; Kafadar, Özkan; Trinh, Phan Trong; Viet, Dat Nguyen; Thanh, Quynh Vo; Thi, Sang Le

doi:10.15625/2615-9783/17013

Cited by 17 publications

(13 citation statements)

References 33 publications

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“…Horizontal gradient is the simplest transformation for identifying interblock zones based on geophysical data. In the future, it may be interesting to use improved versions of the horizontal gradient (Enhanced Horizontal Gradient Amplitude (EHGA) [58,59] or Enhanced Total Gradient (ETG) [60]. Their use will help more accurately determine the position of faults-elements of the strike-slip zone.…”

Section: Predictive Assessment Of the Study Area Based On Geological ...mentioning

confidence: 99%

Impact of the Regional Pai-Khoi-Altai Strike-Slip Zone on the Localization of Hydrocarbon Fields in Pre-Jurassic Units of West Siberia

Egorov,

Antonchik,

Senchina

et al. 2023

Minerals

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The paper presents the results of a geological interpretation using gravity, magnetic, and seismic data to understand the oil and gas potential of pre-Jurassic sedimentary intervals and basement in the central West Siberia basin. The 200 km long Pai-Khoi-Altai strike-slip zone was investigated. Reconstruction based on a data complex indicate the right-lateral kinematics of the principal strike-slip faults and possible fault inversion. The study evaluated the spatial and genetic relationship between the conditions for hydrocarbon trap development and the strike-slip fault systems, such as “flower structures”. Strike-slip geometry and kinematics are confirmed based on 2D and 3D seismic data. Geological and geophysical criteria are used to forecast localization of hydrocarbon fields. Predictive zones are elongated in several different directions and have a different distribution pattern in the blocks separated by principal strike-slip faults, confirming its significance as a controlling factor for the hydrocarbon potential of the region’s structures.

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Section: Predictive Assessment Of the Study Area Based On Geological ...mentioning

confidence: 99%

Impact of the Regional Pai-Khoi-Altai Strike-Slip Zone on the Localization of Hydrocarbon Fields in Pre-Jurassic Units of West Siberia

Egorov,

Antonchik,

Senchina

et al. 2023

Minerals

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show abstract

“…The most popular method in aeromagnetic interpretation for identifying groundwater presence is the filter technique, which aims to highlight the edges of rocks. Analytical signal and horizontal gradient filters [12]; [13] are less efficient at detecting deep source edges when compared to more modern filter types like balanced horizontal derivatives, balanced window standard deviations, and balanced analytic signal [12].…”

Section: Introductionmentioning

confidence: 99%

Application of Remote Sensing and Geophysical Methods for Delineating Groundwater Potential at North Western Nigeria

Osumeje,

Eshimiakhe,

Oniku

et al. 2023

Preprint

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The hydrogeological environment can be mapped and groundwater zones identified by combining geophysical and remote sensing methods. In the Palladan and Basawa region of Sabon-Gari local government area in Kaduna state, northwest Nigeria, subsurface features that serve as conduits for groundwater flow are identified and removed using an integrated methodology. The analytical hierarchy process (AHP) was used to enhance, weight, prioritize, and rank a number of remote sensing and geographic datasets. A GIS platform was then utilized to integrate thematic data and create a groundwater potentiality zonation (GWPZ) map. Topographic lineaments in the area are brought to light in remote sensing data using the lineament extraction technique. Based on the lineament density map, the distribution of these lineaments reveals the degree of porosity or permeability in each area and, consequently, its groundwater potential. Aeromagnetic data filtering permits the construction of a structural map that illustrates various geophysical lineaments that are known to be fault systems in the research area. These faults are the main routes via which groundwater seeps to the subsurface and granitoid-type magnetic rocks intrude into the basement. The research region is badly fractured/failed and made up of four lithologic units, including the aquifer layer (clayey sands in the cracked basement) with thicknesses varying from 12–55 m, according to the vertical electrical sounding (VES) applications. According to geoelectric cross-sections, the subsurface structures are made of granitic rocks that are surrounded by normal faults that trend both NW and NE. It is believed that groundwater flows into the hard rock aquifers in the studied locations through these notable geological features, such as faults and fractures.

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“…Researching mineral deposits, hydrocarbon and geothermal potential, hot springs, and travertine occurrences requires knowledge of tectonic structures such as faults, fractures, their interactions, intersection zones, and the progression of these structures at the subsurface. The potential field methods in geophysics are the widespread methods to identify boundaries of subsurface structures and various techniques have been used to define the edges of density and magnetization structures [1][2][3][4][5]. On the other hand, identifying the presence and location of smooth depressions and uplifts in a sedimentary basin's basement relief may assist in locating stratigraphic and structural oil traps [6,7].…”

Section: Introductionmentioning

confidence: 99%

Mapping of the Structural Lineaments and Sedimentary Basement Relief Using Gravity Data to Guide Mineral Exploration in the Denizli Basin

Altinoğlu

2023

Minerals

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The Aegean Graben System is a complex tectonic structure in Western Anatolia and the Denizli Graben is a member of this system that hosts many geothermal springs, ore deposits, and travertine areas. In this study, the gravity data were analyzed to determine the subsurface geological structures and the depth model of the basin. The Bouguer gravity anomaly has a NW–SE pattern that is consistent with the general trend of the Denizli Basin. The pre-Neogene basement depths range from 0.1 km to 2.3 km. The Denizli Basin is composed of the Çürüksu Basin and the Laodikia sub-basin. The basins have undulated structures with many depressions; the deepest depression region is in the northern part of the Çürüksu Basin, which is close to the Pamukkale Fault Zone. In addition, the new gravity lineament map was obtained by using new-generation edge detection techniques: the tilt angle of the horizontal gradient amplitude (TAHG), and fast sigmoid-edge detection (FSED) of gravity data. The new proposed lineament map shows that the Denizli Basin has complex structures consisting of NW–SE, E–W, and NE–SE trending lineaments, and the major NW–SE trending faults and NE–SW trending lineaments control the main structural configuration. The uplifts and depressions in the basin deposit and the intersection area of lineaments are promising prospective areas for mineral deposits and have energy resource potential.

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Determination of subsurface lineaments in the Hoang Sa islands using enhanced methods of gravity total horizontal gradient

Cited by 17 publications

References 33 publications

Impact of the Regional Pai-Khoi-Altai Strike-Slip Zone on the Localization of Hydrocarbon Fields in Pre-Jurassic Units of West Siberia

Impact of the Regional Pai-Khoi-Altai Strike-Slip Zone on the Localization of Hydrocarbon Fields in Pre-Jurassic Units of West Siberia

Application of Remote Sensing and Geophysical Methods for Delineating Groundwater Potential at North Western Nigeria

Mapping of the Structural Lineaments and Sedimentary Basement Relief Using Gravity Data to Guide Mineral Exploration in the Denizli Basin

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