Gravity survey of groundwater characterization at Labuan Basin

Handayani, Lina; Wardhana, Dadan Dani; Hartanto, Priyo; Delinom, Robert M.; Sudaryanto, Sudaryanto; Bakti, Hendra; Lubis, RF

doi:10.1088/1755-1315/118/1/012015

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…Gravity application is greatly applied in investigating geological structures, ascertaining existence of geothermal reservoirs, detecting volcanic activity and hydrothermal movement beneath volcanoes, examination of CO 2 movement, locating active faults associated with earthquakes and detection of confined cavities (Hakim, 2018). The gravity method helps determine the configuration for the bedrock surface over an area of recent sediment cover (Idris et al, 2015), show the relationship between deeply buried basin and (Handayani et al, 2018) and find mineral resources and groundwater in sedimentary terrain (Balsubramanian, 2007;Chandler, 1994). Residual gravity anomalies' application in detection of the trends of the faults is tested in study areas by distinguishing between high and low gravity anomalies and the downthrown of faults towards low anomalies (Sultan et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Implications on Gravity Anomaly Measurements Associated with Different Lithologies in Turkana South Subcounty

Nyaberi¹

2023

GEP

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The use of gravity data has demonstrated capability for monitoring lithological changes on a large scale as a consequence of differentiating basement and sedimentary of buried valleys. Gravity anomalies are associated with lateral contrasts in density and therefore deformation by faulting or folding will be manifested if accompanied by lateral density changes, otherwise, the vice versa is true. The study's objective is to evaluate the effectiveness of gravity method in establishing different lithologies in an area. The study has revealed that regional anomaly gravity map presents high anomalies in the Northern region in the NW-SE trend and low anomalies in the southern trend in NW-SE, while the residual anomaly gravity map shows different trends for the low and high gravity anomalies. The gravity anomalies are well interpreted in line with the lithologies of the study area rather than the deformation of the same lithologies. There are observed high values of gravity anomaly values (ranging from −880.2 to −501.2 g.u.) where there are eolian unconsolidated rocks overlying the basement compared to low gravity anomaly values (ranging from −1338.9 to −1088.7 g.u.) where the andesites, trachytes and phonolites overly the basement. The different regional gravity anomalies relate well with different rock densities in the study area along the line profile for radially averaged power spectrum. The gravity highs are noted in the eastern point and are associated with andesites, trachytes, basalts and igneous rocks, while the gravity lows are associated with sandstone, greywacke, arkose, and eolian unconsolidated rock. The utilization of the information from the Power spectrum analysis demonstrates that the depth to the deepest basement rock is 12.8 km which is in the eastern flank, while the shallowest to the basement of 1.1 km to the western flank.

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Section: Introductionmentioning

confidence: 99%

Implications on Gravity Anomaly Measurements Associated with Different Lithologies in Turkana South Subcounty

Nyaberi¹

2023

GEP

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“…Groundwater is stored in some layers called an aquifer [1]. The aquifer itself is a layer of rock beneath the soil surface (subsurface) that contains groundwater and can be permeated by water [2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Geology, gravity, seismic, and others can be applied and combined in this state. Each method has its characteristic with different advantages and disadvantages [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…It calculates the physical parameter differences in the form of rock density [3,5]. For example, a previous study used gravity in groundwater exploration at Labuan Basin, Indonesia [2]. This study used residual gravity anomaly data to distinguish igneous from weathered rocks, find faulty structures, and identify potential layers as aquifers.…”

Section: Introductionmentioning

confidence: 99%

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3D inversion modelling of gravity and geomagnetic in the coastal aquifer of the Mandalika Lombok

Alaydrus

Susilo

Minardi

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Coastal aquifers are essential for coastal communities worldwide, one of which is in the Mandalika area (Lombok Island, Indonesia). This area is the tourism sector which requires an adequate supply of fresh water. Mandalika is a coastal area dominated by alluvial plains, an excellent rock as an aquifer. However, alluvial plains are also susceptible to seawater intrusion. This study uses a combination of gravity and geomagnetic methods to estimate bedrock potential as aquifers based on a 3D inversion model. Data collection was carried out at 151 measuring points using the loop method. Data processing was conducted using Oasis Montaj, Mag3D, and Grav3D. The data were combined to reduce ambiguity in interpreting rock-type estimates. The modelling results show that aquifer composition consists of sandstone, clay, and gravel with a density of about (1.3 - 2.4) g/cm3, susceptibility (0.00040 - 0.0045) SI at an average depth of 2 - 12 m with a percentage of 54.849% of the total 3D models. These rocks dominate the research location scattered around the coastal area of Kuta, around the Circuit to the Mertak area, and are concentrated in the flat morphology areas.

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Gravimetric Determination of Storage Coefficient and Storage Change of Groundwater in an Uncontrolled and Unconfined Aquifer

et al. 2021

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Gravity survey of groundwater characterization at Labuan Basin

Cited by 6 publications

References 20 publications

Implications on Gravity Anomaly Measurements Associated with Different Lithologies in Turkana South Subcounty

Implications on Gravity Anomaly Measurements Associated with Different Lithologies in Turkana South Subcounty

3D inversion modelling of gravity and geomagnetic in the coastal aquifer of the Mandalika Lombok

Gravimetric Determination of Storage Coefficient and Storage Change of Groundwater in an Uncontrolled and Unconfined Aquifer

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