Toolbox for Analysis of Flexural Isostasy (TAFI)—A MATLAB toolbox for modeling flexural deformation of the lithosphere

Jha, Sumant; Harry, Dennis L.; Schutt, D.

doi:10.1130/ges01421.1

Cited by 12 publications

(11 citation statements)

References 35 publications

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“…TAFI is a suite of tools for the MATLAB computing platform that supports forward modelling of flexural subsidence and uplift of the lithosphere in response to tectonic loading. The TAFI provides an easy‐to‐use interactive tool to model isostatic deformation of the lithosphere as flexural bending of an elastic plate and the details of the tool can be referred to Jha, Harry, and Schutt (2017). Following the idea that Te can be recovered best using gravity anomaly and across‐trench profiles used for flexural modelling test are at least 750 km long (Hunter & Watts, 2016), we adopted the EGM2008 free‐air gravity anomaly data to analyse the flexural deformation of the subducting Pacific Plate along three across‐trench profiles length of over 800 km (Figure 9).…”

Section: Discussionmentioning

confidence: 99%

Heterogeneous outer‐rise seismicity within the Izu–Bonin subduction zone and its tectonic implications

et al. 2021

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Combining with available focal mechanisms, we chose 13 events (M ≥ 3.5) for waveform inversion to determine the stress field at the outer‐rise region within the Izu–Bonin subduction zone. Indicated by the distribution of the epicentres, seismic energy release, and stress field within the outer‐rise region, the subduction zone is divided into three segments separated by 29°N and 32.5°N. The outer‐rise seismicity presents an extensional stress field in the upper part (0–40 km) of the subducting oceanic plate. Whereas, the maximum focal depth within the outer‐rise region tends to increase northwards, and the deep part (>40 km) of the subducting slab is gradually governed by a general compressional stress regime that has never been observed before, which implies that the subduction of the old Pacific Plate along the Izu–Bonin trench is characterized by a heterogeneous bending deformation. According to modelling the flexural bending of the oceanic lithosphere, it is observed that effective elastic thickness (Te) of the Izu–Bonin subduction zone decreases from 38 to 28 km along the trench strike, indicating a decrease of plate rigidity northwards. The spatial variations of Te exactly explain the heterogeneous outer‐rise seismicity within the Izu–Bonin subduction zone, which is the energy release of the bending formation of the subducting plate. As shown in the results presented here, the varied flexural deformation of the subducting Pacific Plate is closely correlated with the heterogeneous thermal age, the varied morphology, and the coupling degree of the subducting plate.

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Section: Discussionmentioning

confidence: 99%

Heterogeneous outer‐rise seismicity within the Izu–Bonin subduction zone and its tectonic implications

et al. 2021

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“…gflex, Wickert, 2016) whereas other numerical methods use the superposition of local solutions to point loads in in the wavenumber domain (e.g. Green's functions, TAFI v1.0, Jha et al, 2017), or in the spectral domain (Wienecke et al, 2007), for example. These use biharmonic equation for plate flexure with uniform elastic properties.…”

Section: Flexural Compensationmentioning

confidence: 99%

“…Layout is from PALEOSTRIP Plot GUI. Comparison of backtracked basement depths for different but spatially uniform lithospheric elastic thicknesses (Te): b. between PA-LEOSTRIP finite difference isostasy and Flex-Decomp(Kusznir et al, 1995) Fast Fourier Transform (wavenumber-based) isostasy model; c. between PALEOSTRIP finite difference isostasy and TAFI(Jha et al, 2017) Green's function spectral isostasy model; d. Same as b. but accounting for thermal subsidence correction using an age of Rift = 85 Ma and a uniform β = 2.…”

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confidence: 99%

PALEOSTRIPv1.0 – a user-friendly 3D backtracking software to reconstruct paleo-bathymetries

Colleoni¹,

Santis²,

Pochini³

et al. 2021

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Abstract. We present PALEOSTRIPv1.0, a MATLAB open-source software designed to perform 1D, 2D and 3D backtracking of paleo-bathymetries. PALEOSTRIP comes with a Graphical User Interface (GUI) to facilitate computation of sensitivity tests and to allow the users to switch on and off all the different processes and thus separate the various aspects of backtracking. As such, all physical parameters can be modified from the GUI. It includes 3D flexural isostasy, 1D thermal subsidence and possibilities to correct for prescribed sea level and dynamical topography changes. In the following we detail the physics embedded within PALEOSTRIP and we show a few applications on a drilling site (1D), a transect (2D) and a map (3D), taking the Ross Sea (Antarctica) as a case study. PALEOSTRIP has been designed to be modular and to allow user to insert their own implementations.

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“…gflex, Wickert, 2016), whereas other numerical methods use the superposition of local solutions to point loads in the wavenumber domain (e.g. Green's functions, TAFI v1.0, Jha et al, 2017) or in the spectral domain (Wienecke et al, 2007), for example. These use biharmonic equation for plate flexure with uniform elastic properties.…”

Section: Flexural Compensationmentioning

confidence: 99%

“…4a). We also compare PALEOSTRIP backtracked results with those using the analytic solution from TAFI v1.0 (Jha et al, 2017) and implemented within PALEOSTRIP for the need of comparison (Fig. 6c).…”

Section: Paleostrip Validationmentioning

confidence: 99%

PALEOSTRIPv1.0 – a user-friendly 3D backtracking software to reconstruct paleo-bathymetries

et al. 2021

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Abstract. Paleo-bathymetric reconstructions provide boundary conditions to numerical models of ice sheet evolution and ocean circulation that are critical to understanding their evolution through time. The geological community lacks a complex open-source tool that allows for community implementations and strengthens research synergies. To fill this gap, we present PALEOSTRIPv1.0, a MATLAB open-source software designed to perform 1D, 2D, and 3D backtracking of paleo-bathymetries. PALEOSTRIP comes with a graphical user interface (GUI) to facilitate computation of sensitivity tests and to allow the users to switch all the different processes on and off and thus separate the various aspects of backtracking. As such, all physical parameters can be modified from the GUI. It includes 3D flexural isostasy, 1D thermal subsidence, and possibilities to correct for prescribed sea level and dynamical topography changes. In the following, we detail the physics embedded within PALEOSTRIP, and we show its application using a drilling site (1D), a transect (2D), and a map (3D), taking the Ross Sea (Antarctica) as a case study. PALEOSTRIP has been designed to be modular and to allow users to insert their own implementations.

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Toolbox for Analysis of Flexural Isostasy (TAFI)—A MATLAB toolbox for modeling flexural deformation of the lithosphere

Abstract: ABSTRACT

Cited by 12 publications

References 35 publications

Heterogeneous outer‐rise seismicity within the Izu–Bonin subduction zone and its tectonic implications

Heterogeneous outer‐rise seismicity within the Izu–Bonin subduction zone and its tectonic implications

PALEOSTRIPv1.0 – a user-friendly 3D backtracking software to reconstruct paleo-bathymetries

PALEOSTRIPv1.0 – a user-friendly 3D backtracking software to reconstruct paleo-bathymetries

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