Publication Date:
2021-03-29
Description:
Movement on fault planes causes a large
amount of smaller-scale deformation,
ductile or brittle, in the area surrounding
the fault. Much of this deformation
is below the resolution of reflection
seismics (i.e. sub-seismic, 〈10m
displacement), but it is important to determine
this deformation, since it can
make up a large portion of the total bulk strain, for instance in a developing
sedimentary basin. Calculation of
the amount of sub-seismic strain around
a fault by 3-D geometrical kinematic
retro-deformation can also be used to
predict the orientation and magnitude
of these smaller-scale structures.
However, firstly a 3-D model of the fault
and its faulted horizons must be constructed
at a high enough resolution
to be able to preserve fault and horizon
morphology with a grid spacing of
less than 10 m. Secondly, the kinematics
of the fault need to be determined,
and thirdly a suitable deformation algorithm
chosen to fit the deformation
style. Then by restoring the faulted
horizons to their pre-deformation state
(a ‘regional’), the moved horizons can
be interrogated as to the strain they
underwent. Since strain is commutative,
the deformation demonstrated during
this retro-deformation is equivalent
to that during the natural, forward deformation...
Description:
conference
Keywords:
551
;
TQC 220
;
TSB 000
;
VAE 200
;
VAE 400
;
VBE 000
;
Reflexionsseismik {Geophysik}
;
Mitteleuropa {Geophysik}
;
Geodynamik der Lithosphäre {Geologie}
;
Tektogenese {Geologie}
;
Modellierung von Prozessen in der Geosphäre
;
Niedersächsiches Becken
;
Dreidimensionale Seismik
;
Störung 〈Geologie〉
;
Kinematik
;
Modell
Language:
German
Type:
anthologyArticle
,
publishedVersion
Format:
application/pdf
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