Results 11 to 20 of about 508,483 (302)
Stochastic inversion for scaling geology [PDF]
Geophysical Journal International, 1990 SUMMARY We have examined acoustic, density resistivity, gamma-ray and neutron logs from a number of boreholes in both sedimentary and igneous sequences. We show that the power spectra of these geophysical variables obey a scaling law, that is, the power spectra are proportional to some power of the frequency.
J P Todoeschuck
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Inversion of Structural Geology Data for Fold Geometry [PDF]
Journal of Geophysical Research: Solid Earth, 2018 AbstractRecent developments in structural modeling techniques have dramatically increased the capability to incorporate fold‐related data into the modeling workflow. However, these techniques are lacking a mathematical framework for properly addressing structural uncertainties. Previous studies investigating structural uncertainties have focused on the
Lachlan Grose +2 more
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Impact of uncertain geology in constrained geophysical inversion [PDF]
ASEG Extended Abstracts, 2018 The integration of geological modelling, petrophysics and geophysics in a single inversion scheme is a complex and powerful strategy for solving challenges faced in geoscientific resource explorati...
Roland Martin +2 more
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Towards an integrated inversion of geoscientific data: What price of geology?
Tectonophysics, 2010 Abstract The inversion of multiple geoscientific datasets to define structures in hard rock terrains has for the most part been limited to geophysical methods supported by rock property constraints. In this paper we expand the range of constraints available to geological modellers by defining a series of misfit functions that are used to define the ...
Mark Jessell, Laurent Ailleres
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Dykes, Synclines and Geophysical Inversion - is geology important? [PDF]
ASEG Extended Abstracts, 2018 In the last 10 years, the average depths of cover for gold and base metal discoveries was 60 and 128 metres respectively (Schodde, 2017). Existing methods of geophysical search techniques appear to lose their practical effectiveness below ~200m. This lack of success has been highlighted as part of the general UNCOVER movement in Australia.
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Engineering Geology, 2023 In probabilistic inversion of geophysical data, one must describe the expected noise in the system, and any prior information. In a geoscience context, prior information can provide a quantitative description of the expected spatial variability and correlations of the geology.
Rasmus Bødker Madsen +2 more
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Archived multi-objective simulated annealing transient electromagnetic inversion [PDF]
Scientific ReportsWe present a novel multi-objective optimization algorithm, Archived Multi-Objective Simulated Annealing (AMOSA), based on simulated annealing for transient electromagnetic (TEM) one-dimensional inversion.
Youxin An +8 more
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Inversion methodology for determination of near-surface geology from seismic refraction amplitudes [PDF]
ASEG Extended Abstracts, 2012 The amplitude of a seismic refraction event is determined by the properties of rocks through which the seismic waves travel, the amplitude of the shot and the offset at which the refraction is recorded. A surface-consistent, non-linear inversion scheme, which uses the Levenberg-Marquardt algorithm, has been developed which aims to extract near-surface ...
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Blockworlds 0.1.0: a demonstration of anti-aliased geophysics for probabilistic inversions of implicit and kinematic geological models [PDF]
Geoscientific Model Development, 2022 Parametric geological models such as implicit or kinematic models provide low-dimensional, interpretable representations of 3-D geological structures. Combining these models with geophysical data in a probabilistic joint inversion framework provides an ...
R. Scalzo +16 more
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Seismic imaging and recognition technology of medium and shallow channel sand body [PDF]
E3S Web of Conferences, 2022 The fine characterization of channel sand body is a complex system engineering. The longitudinal superposition relationship of channel is complex, the sandstone thickness is thin, and the lateral changes of lithology and physical properties are obvious ...
Wang Dongna
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