The Moho Relief Beneath the Zagros Collision Zone Through Modeling of Ground-Based Gravity Data and Utilizing Open-Source Resources in Python

Ardestani, Vahid E.; Mousavi, Naeim

doi:10.1007/s00024-022-03221-7

Cited by 4 publications

(7 citation statements)

References 37 publications

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“…Kaviani et al (2020) suggested the Moho depth through a Vs seismic tomography for the entire Middle-East area. In agreement with the Moho estimate by Kaviani et al (2020), the authors have recently reported a ~55-60 km thick crust beneath the high Zagros using the inversion of gravity data (Ardestani and Mousavi, 2022).…”

Section: Previous Studies On the Zagros Sedimentary Cover And Mohosupporting

confidence: 80%

“…Modeling gravity data to reveal the underground structure and geological features is very popular (Mousavi and Ebbing, 2018;Ardestani et al, 2021Ardestani and Mousavi, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Modeling the Moho depth using gravity and magnetic data has been well documented Different approaches such as Bouguer slab, power spectrum analysis, fast Fourier transform, and linear and non-linear inversion are considered for estimating the depth to the Moho boundary. In this respect, we can refer to several published papers such as, Werner, 1953;Bott, 1960;Cordell, et al, 1968;Oldenberg, 1974;Parker, 1972;Reid, et al, 1990;Salem, et al, 2007;Martins, et al, 2011, Fedi, et al, 2012Sun, et al, 2015;Feng, et al, 2018;Florio, 2020, Schmidt et al, 2010and Sampietro, 2016 The depth of the Moho beneath the Iranian plateau has been investigated by several researchers through gravity modeling, (Dehghani and Makris, 1983;Snyder and Barazangi, 1986, Dehghan et al, 2021, Ebadi et al, 2019, Heydarizadeh Shali et al, 2020, Eshagh, 2014Ardestani and Mousavi, 2022). A combined gravity and magnetic modeling (Mousavi and Ebbing, 2018), seismic (Tatar, 2001;Javan-Doloei, 2002, Paul et al, 2006, Motaghi et al, 2015, integrated thermal modeling , Motavalli et al, 2011 and integrated geophysical-petrological modeling (Mousavi and Fullea, 2020).…”

Section: Introductionmentioning

confidence: 99%

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The shallow and deep crustal structure in Zagros from inversion and forward modeling: insights from the application of Moho-free Bouguer anomaly

Ardestani

Mousavi

2022

Preprint

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The contribution of shallow and deep portions of crust in Bouguer anomaly is a long-lasting challenge. Several attempts including filtering of data are being performed. Filtering outcomes are enormously subject to disagreements due to disputable possible choice of cut-off wavelength. Here, we develop in novel strategy to divide the contribution of shallow and deep crustal structures in the Bouguer anomaly. The Moho relief is estimated by the inversion of Bouguer anomalies. The gravity effect of the volume mass between the estimated Moho and the ground surface is computed by parametrization of the volume mass by different meshes (tensor, quad tree, and octree). Octree mesh is opted as the best one after assessing the different meshing results visually and statistically. Then this gravity effect is subtracted from the Bouguer anomalies to obtain the Moho-free Bouguer anomalies. This Moho-free Bouguer anomaly is inverted to obtain the uppermost density contrast representing a proxy for sedimentary thickness and/or magmatic intrusions. The inversions are carried out by using a very popular and robust method for non-linear problems which is called sparse norm inversion and is accessible through SimPEG (Simulation and Parameter Estimation in Geophysics) in Python. Importantly, the inversion process does not need an initial geometry model or density contrast and is completely automatic.

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Section: Previous Studies On the Zagros Sedimentary Cover And Mohosupporting

confidence: 80%

“…Modeling gravity data to reveal the underground structure and geological features is very popular (Mousavi and Ebbing, 2018;Ardestani et al, 2021Ardestani and Mousavi, 2022).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The shallow and deep crustal structure in Zagros from inversion and forward modeling: insights from the application of Moho-free Bouguer anomaly

Ardestani

Mousavi

2022

Preprint

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“…The calculation of the Moho depth requires an initial depth interface, which is refined iteratively through the calculation using the Parker-Oldenburg algorithm (Gómez-Ortiz and Agarwal, 2005; Chen et al, 2021) or based on 3D gravity inversion using GROWTH 2.0 (Ashena et al, 2018). The initial depth interface use the average depth value of the causative body, which is derived from the spectral analysis or the 3D Euler deconvolution (Reid et al, 1990;Beiki, 2010;Golshadi et al, 2016;Parang et al, 2016) instead of using shear wave tomography (Ardestani and Mousavi, 2023). The spatial analysis of the Moho depth distribution is integrated with the findings from lineament analysis and 3D inversion to provide a comprehensive explanation of the tectonic settings within the study area.…”

Section: Methodsmentioning

confidence: 99%

“…The model parameters or physical properties in our study are correlated with the density contrast (ρ) and susceptibility (χ) distribution beneath the surface. Inverse modelling is also known as the fitting of the model function F[m] from a vector of m as the physical property to a set n number of data points (Grandis, 2009;Ardestani and Mousavi, 2023). The solution is approximated by using weighted least square errors between the data points with the predicted dataset.…”

Section: Gravity and Magnetic Inversionmentioning

confidence: 99%

Extensional Tectonic Investigation Based on Gravity and Magnetic Data Analysis in the Gulf of Tomini, Indonesia

Handyarso,

Permana,

Hanafi

et al. 2023

MGPB

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The enigmatic genesis of Sulawesi Island remains a debate among earth scientists up to the present day. The Northern Arm of Sulawesi is designated as a volcanic province, while the Eastern Arm is identified as an ophiolite zone along with several micro continental fragments. However, the tectonic relationship in the marine area between these two arms is not clearly defined. The existence of isolated volcanic islands, namely the Una-Una and Togian islands increases the complexity of the area. A regional study utilizing gravity and magnetic methods is needed in the Gulf of Tomini, North Sulawesi, Indonesia. Therefore, a comprehensive analysis was conducted, involving 3D inverse modelling and Moho depth estimation based on the Parker-Oldenburg algorithm using 3D Euler deconvolution to obtain the average depth of causative bodies. As a result, the presence of extensional tectonics were revealed and identified as multiple parallel dextral strike-slip faults across the study area. All of these faults show northwest-southeast lineaments consistent with the existing seismic sections. The extensional tectonic mechanism triggers crustal thinning and rifting, leading to the build-up of graben structures such as the Gorontalo, Tomini, and Poso basins. Additionally, it influences volcanic activity around the Togian and Una-Una islands. The major axes of the inferred opening area are oriented in the northeast-southwest direction, perpendicular to the lineaments of these faults. The opening area coincides with the orientation of Lalanga and Togian ridges. Finally, a regional geological structure is proposed across the Gulf of Tomini linking both the Northern and Eastern arms of Sulawesi.

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High precision structural mapping using advanced gravity processing methods: a case study from the North region of Cameroon

Kamto,

Oksum,

Yap

et al. 2023

Acta Geophys.

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The main purpose of this work is to perform a high-precision mapping of geological features (lineaments and faults) likely to develop underground aquifers in the crystalline and metamorphic rocks of northern Cameroon. The main techniques used for gravity data processing included the tilt angle of horizontal gradient (TAHG), the improved logistic lter (ILF), the fast sigmoid edge detector lter (FSF), and an edge detection lter based on the arcsine function (ASF). Before applying these edge detection lters to major geological units of North Cameroon, their effectiveness and performance have been assessed through synthetic gravity data with and without gravity perturbation. In addition, the Euler deconvolution formula has been used to estimate the position and the apparent depth of anomalous gravity sources in the study region. It appears that the main structural features are trending along the N-S, NNE-SSW and NE-SW directions. The deepest density anomalies in the region are identi ed in the NW-SE direction, which coincides well with the extension of the West and Central African rift system in the study area. The advanced edge detection techniques and the Euler deconvolution method have both identi ed a network of super cial lineaments around longitude 13 o N and latitude 8 o N, and located between 0 and 4 km depth. The NW-SE trending crustal features outlined in the northeast of the region, indicate that the area would have been the target of a uniform tectonic activity. This work is a contribution to a better knowledge of the con guration of fractures network, and to a better exploitation of groundwater resources available in the region.

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The Moho Relief Beneath the Zagros Collision Zone Through Modeling of Ground-Based Gravity Data and Utilizing Open-Source Resources in Python

Cited by 4 publications

References 37 publications

The shallow and deep crustal structure in Zagros from inversion and forward modeling: insights from the application of Moho-free Bouguer anomaly

The shallow and deep crustal structure in Zagros from inversion and forward modeling: insights from the application of Moho-free Bouguer anomaly

Extensional Tectonic Investigation Based on Gravity and Magnetic Data Analysis in the Gulf of Tomini, Indonesia

High precision structural mapping using advanced gravity processing methods: a case study from the North region of Cameroon

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