These down-dip projections
were used as passive markers in the model. Analysis of these surfaces gave
information to the orientation of existing fabrics after "retro-deformation".
Down-dip projection of foliation in the ZEV.
Scale: Frankonian Lineament
is 35 km long.
Elements:
Down/dip projections of
the ZEV foliation (yellow and green surfaces; for
method see above)
Frankonian Lineament (olive
green; down to 10 km)
Luhe Lineament (red; down
to 10 km)
Outline of Leuchtenberg
and Falkenberg Granites (red; down to 8 km)
Scale: Model is approx. a
12 km cube
Elements:
All surfaces were picked
from migrated inline seismic traces of the ISO '89 seismic
survey. These are interpreted as:
green - the Frankonian Lineament,
pink & red - "B" surfaces (senso Wiederhold 1992;
KTB Report 92-5), yellow - unknown surface
purple - base of the Carboniferous
sediments west of the Frankonian L.
Mainly these data were used
to verify the depth continuation of the Frankonian Lineament.
Seismic interpretation of the ISO '89 data (timeslices)
Scale: Frankonian Lineament
is 35 km long
Elements:
Frankonian Lineament (dark
red) projected from the surface outcrop on a vector of 055/55 to a depth
of 10 km.
All other surfaces were picked
from migrated timesections of the ISO '89 seismic
survey. These are interpreted as:
SE1 - SE4-5 (after Wiederhold
1992; KTB Report 92-5). They are all probably parallel equivalents to the
Frankonian Lineament.
Note how these timesection surfaces fit very well to the projection of the Frankonian Lineament.
The Dogger/Malm sedimentary contact west of the Frankonian Lineament
Scale: Frankonian Lineament
is 35 km long
Elements:
The Dogger/Malm contact
west of the Frankonian Lineament, split into 4 "lands" (green, yellow,
brown, and red) separated by faults (parallel the Frankonian L.
and the Luhe Lineament) shown in grey.
Vertical and lateral offsets
of the blocks is approx. 500 m and 800 m, respectively.
This model was used to determine
the kinematics of the Upper Cretaceous event. The best
restoration path for these blocks is direct northwards lateral displacement
and then a purely vertical component.
The present geometrical ZEV model (without topography)
Scale: Frankonian Lineament
is 35 km long
Elements:
Frankonian Lineament (blue),
Luhe Lineament (light green), both faults at depth continue
at depth (~10 km) into a detachment which dips eastwards by 10°; pink)
Down/dip projections of
the ZEV foliation (yellow surfaces; for method see above)
Outline of Leuchtenberg,
Flossenbürg and Falkenberg Granites (red; down to 8 km), Moldanubian/ZEV
boundary and Erbendorf Lineament (orange-brown)
Model of the ZEV, after removing the Upper Cretaceous deformation
Scale: Frankonian Lineament
is 35 km long.
Elements:
Present topographies of
the Southern German Basin (yellow), ZEV (green), Moldanubian (brown)
Frankonian Lineament (blue),
Luhe Lineament (light green), both faults at depth continue
at depth (~10 km) into a detachment which dips eastwards by 10°;
pink)
Deformation:
The hanging wall (the topographies
of the ZEV and the Moldanubian) and passive elements
of the ZEV has been moved direct northwards above the combined faults of
the Frankonian L., Luhe L. and the detachment. The deformation
of the hanging wall was achieved with inclined shear,
shear vector 245/60. This is the opposite kinematic
framework to that of the Upper Cretaceous. 7 km hanging wall displacement
(as seen here), satisfied geological and geophysical criteria. Hence the
model shows the situation of the present-day topographies before the
start of the Upper Cretaceous. For more information see Tanner
et al. (Sp. Pub. Geol. Soc. London 1998).
Model of the ZEV, after removing the Falkenberg Granite (strain method)
Scale: Frankonian Lineament
is 35 km long.
Elements:
Present topographies of
the Southern German Basin (yellow), ZEV (green), Moldanubian (brown)
Frankonian Lineament (blue),
Luhe Lineament (light green), both faults at depth continue
at depth (~10 km) into a detachment which dips eastwards by 10°;
pink)
Retro-deformation:
The Upper Carboniferous
Falkenberg Granite was removed from the ZEV model using a strain tool,
whereby the granite pluton is drawn downwards out of the ZEV. This method
is appropriate if a ductile, active emplacement of the granite can be assumed.
Model of the ZEV, after removing the Falkenberg and Flossenbürg Granites (strain method)
Scale: Frankonian Lineament
is 35 km long.
Elements:
Present topographies of
the Southern German Basin (yellow), ZEV (green), Moldanubian (brown)
Frankonian Lineament (blue),
Luhe Lineament (light green), both faults at depth continue
at depth (~10 km) into a detachment which dips eastwards by 10°;
pink)
Retro-deformation:
The Upper Carboniferous
Falkenberg and Flossenbürg Granites were removed from the ZEV model
using a strain tool, whereby the granite plutons were drawn downwards out
of the ZEV. This method is appropriate if a ductile, active emplacement
of the granites can be assumed.
Model of the ZEV, after removing the Falkenberg Granite (volume method)
Scale: Frankonian Lineament
is 35 km long.
Elements:
Present topographies of
the Southern German Basin (yellow), ZEV (green), Moldanubian (brown)
Frankonian Lineament (blue),
Luhe Lineament (light green), both faults at depth continue
at depth (~10 km) into a detachment which dips eastwards by 10°;
pink)
Retro-deformation:
The Upper Carboniferous
Falkenberg Granite was removed from the ZEV model using a volume constant
tool, whereby the granite pluton is drawn downwards out of the ZEV and
only objects directly above the granite are affected. This method is appropriate
if a brittle, volume-constant emplacement of the granite can be assumed.