First horizontal derivative and Euler Deconvolution in application for reconstructing structural signature over the Blawan-Ijen Geothermal area

Daud, Yunus; Sulistyo, Agus; Fahmi, Fikri; Nuqramadha, Wambra Aswo; Fitrianita,; Sesesega, Rhyno Senbyla; Rosid, Syamsu; Pati, G. P.; Maulana, M. R.; Khoiroh, Mufidatul; Rahman, Khalif Radhiyya; Subroto, Wisnu

doi:10.1088/1755-1315/254/1/012008

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…The First Horizontal Derivative is a method used to determine the presence of a density contrast boundary by detecting edge effects due to fault structures or other geological boundary features (Daud et al 2018;Gumelar 2022;Rizqia 2022). This method is applied based on the understanding that the horizontal gradient of the gravity anomaly is caused by tabular bodies impinging on the edges of vertical bodies and is well separated from each other (Daud et al 2018). This method can be regarded as a high-pass filter based on the horizontal and vertical derivatives of the gravity anomaly (Daud et al 2018).…”

Section: First Horizontal Derivative (Fhd)mentioning

confidence: 99%

Untitled

2023

JSM

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Mud volcanoes, known as mud extrusion phenomenon, is a geological feature that expels suspended fine-grained sedimentary materials and fluids to the surface due to buoyancy and pressure difference. This geological feature is found almost all over the world and formed in compressional tectonic environments, one of which is the Ciuyah Mud Volcano, Kuningan, Indonesia. Previous studies have shown that the appearance of the mud volcano was influenced by tectonic activity that formed a 'hypothetical' fault structure as a pathway for mud migration and extrusion to the surface. Integration of geophysical studies using satellite gravity and geology using fault fracture density analysis was conducted to prove the existence of the 'hypothetical' fault structure. The results show that the mud volcano site is located in a low to high gravity anomaly pattern associated with significant density contrast differentiation followed by the maximum value of FHD and low-high SVD pattern oriented west southwest -east northeast (WSW -ENE). The gravity anomaly pattern can be associated with the presence of faults. This is reinforced by the fault fracture density map which shows that the mud volcano site is located in a medium to high fracture density zone (weak zone) associated with good permeability conditions below the surface. Thus, the research results have proven the existence of a 'hypothetical' fault as the migration and extrusion pathway of Ciuyah Mud Volcano mud that has been studied previously.

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Section: First Horizontal Derivative (Fhd)mentioning

confidence: 99%

Untitled

2023

JSM

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“…Berdasarkan uraian di atas, penelitian ini bertujuan untuk mengidentifikasi struktur bawah permukaan daerah potensi panas bumi Cipari menggunakan data gravitasi GGMPlus. Identifikasi struktur menggunakan analisis First Horizontal Derivative (FHD) untuk menentukan batas kontak vertikal antar lapisan batuan dan Second Horizontal Derivative (SVD) sebagai identifikasi patahan (Daud et al, 2019;Wahyudi et al, 2017). Hasil penelitian diharapkan dapat menunjang hasil penelitian-penelitian sebelumnya yang telah dilakukan di daerah tersebut, serta memberikan gambaran umum struktur bawah permukaan yang terdapat pada wilayah panas bumi Cipari.…”

Section: Pendahuluanunclassified

“…FHD merupakan akar dari penjumlahan kuadrat turunan parsial pertama horizontal dari anomali gravitasi terhadap X dan Y (Rosid & Siregar, 2017). Metode FHD mengindikasikan batas-batas struktur geologi berdasarkan nilai maksimum atau minimum FHD (Daud et al, 2019). Metode SVD mengkonfirmasi adanya struktur pada nilai nol (Azkia & Daud, 2021).…”

Section: Metode Penelitianunclassified

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Analisis Data Gravitasi Untuk Identifikasi Struktur Bawah Permukaan Daerah Potensi Panas Bumi Cipari

Agustin

Wibawa

2022

Jambura Geosci. Rev.

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Geothermal prospect in Cipari has been shown by spring who has a temperature of about 50°C and is categorized as a low temperature. The presence of spring on Cipari earth's surface is an indication of geothermal structures' existence on the surface and a geothermal system below the surface. Geophysical methods can be used for subsurface structures identification, one of them is the density method with gravity data. This study has an objective to identify the subsurface structures in Cipari geothermal potential area using GGMPlus gravity data. Terrain and Bouguer corrections were used to obtain Complete Bouguer Anomaly (CBA). Separation of regional and residual anomalies using Butterwoth and Bandpass filters. The rock contact boundary was obtained by the FHD method and geological structures such as faults were obtained by the SVD method. FHD and SVD results were used as information for 2D forward modeling. The ABL map shows anomalous contrasts in areas that have rock contacts and geological faults. The high anomaly in the center of the study area indicates the Cipari anticline. Data processing and analysis concluded that the area around the Cipari hot spring has anticline, several rock contacts, and normal fault structures. The fault in the study area is part of the geothermal system which is confirmed by GGMPlus data.

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“…In the analysis of regional gravity data interpretation, structural indices of 0.5 for dyke, 1.0 for the pipe-like model, and 2.0 for the sphere are common (16)(17)(18)(19) . In Euler's homogeneity equation, the definition of the structural index is as per Equation (2).…”

Section: Euler Deconvolutionmentioning

confidence: 99%

Thermal zone identification by gravity data modeling using Euler deconvolution and geochemical analysis of hot springs in Saurashtra and Cambay Basins

Bist¹,

Sircar²,

Yadav³

2021

IJST

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Objective: This study is aimed at interpreting geochemical and geophysical data of 4 locations in Gujarat, India to understand the subsurface geothermal hotspot locations. Methods: CG-5 gravimeter was used to collect the gravity data. Data corrections were done to obtain a complete Bouguer anomaly. The depth of the dense bodies was calculated using Euler deconvolution. Also, the geochemical classification of physiochemical properties of geothermal spring waters of the locations was evaluated to assess their possible applications. Findings: In the sample region, the complete Bouguer anomaly analysis ranges between 1.99 mGal-2.23 mGal. The Euler deconvolution produced depth solutions ranging from 100 to 450 meters, which were mostly found near gravity highs, and the presence of deep structures can be deduced. These deep structures are translated as dense intruding bodies trapped by an overlying cap rock. The Geochemical analysis was done of the four samples. Based on the results of various plots such as Ternary, Durov, Piper, Stiff, the waters are graded as cationic with Na+K and anionic with Cl+SO 4 . The sample waters indicate suitability for drinking and irrigation at some locations. Finding these hotspots and exploiting them is of importance for these areas which are dealing with the acute water crisis. Novelty: Euler deconvolution of gravity data was first time applied for subtle geothermal trap identification in Saurashtra and Cambay basins. It has been established through this study that surface manifestation of these subtle traps are the hot springs. Systematic geochemical characterization of the hot springs progressed the nascent geothermal energy research of India.

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First horizontal derivative and Euler Deconvolution in application for reconstructing structural signature over the Blawan-Ijen Geothermal area

Cited by 7 publications

References 4 publications

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Analisis Data Gravitasi Untuk Identifikasi Struktur Bawah Permukaan Daerah Potensi Panas Bumi Cipari

Thermal zone identification by gravity data modeling using Euler deconvolution and geochemical analysis of hot springs in Saurashtra and Cambay Basins

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