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EULER_Melo_Barbosa_SBGf_2019.pptx (12.73 MB)

Visualization of Euler deconvolution estimates on traditional and plateau plots

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posted on 2019-08-23, 11:41 authored by Felipe F. MeloFelipe F. Melo, Valeria C. F. BarbosaValeria C. F. Barbosa
of potential field data. The method estimates the position
and the base level for a given nature (i.e., structural index
– SI) of a geologic source based on the magnetic dada.
These estimates are computed inside a moving data
window spanning the whole dataset. The selection of the
best estimates is related to the plot of these estimates.
Traditionally, for each SI, the estimates of source
horizontal coordinates obtained for each position of a
moving data window are plotted in the plan view of the
study area and the estimates of source depth are
represented by different color or size. This traditional plot
requires a criterion to select the best estimates and deal
with the spread of solutions. In this case, mostly, the baselevel
estimates are computed but they are not used or
shown. We compare the traditional plot of the estimates
from magnetic fields with an alternative plot where, for
each SI, every estimate is plotted against the central
position of the moving data window. At this plot, when the
correct SI is used the solutions form a plateau of constant
values. We perform the analysis for synthetic data sets
generated by different SI and for a real data set, beyond
that; we plot base-level estimates in the traditional way. We
run Euler deconvolution over the Diorama anomaly,
located in the Goiás Alkaline Province, Brazil, and analyze
the estimates over different plots. From the results of both
plots we may infer that Diorama anomaly is generated by
at least two vertical plugs.


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