Accounting
for i
gneous intrusion
s
in
to
sedimentary basins
is
important to the petroleum
industry
because
magmatism deforms
the host rock
and affects the thermal evolution of a basin,
thereby influencing hydrocarbon generation, migration, and accumulation.
Presently,
numerous
mechanisms concerning the
syn
-
emplacement (i.e. elastic bending related active uplift and
aureole induced volume reduction) and post
-
emplacement (i.e. differential
compaction)
deformation of the host rock have been suggested
.
In this study, we investigate the relevance of
the
different
existing
syn
-
or post
-
emplacement related mechanical models of dome growth
accommodating the
emplacement of igneous sills.
We us
e
hi
gh
-
quality 3D seismic
and well data
located in the western part of the Møre Basin (mid
-
Norwegian margin) to analyze
the
deformation of Cretaceous
–
Paleogene overburden associated with the emplacement of the
Tulipan
saucer
-
shaped
sill
between 55.8 and 54.9
Ma
.
H
orizon interpretation
s
and various
thickness and attribut
e maps show a clear correlation between the
saucer
-
shaped Tulipan sill
and
an observed domed structure above.
Additional
l
y
,
we observe
in the shallow parts of the dome
structure
hydrothermal ve
nt
complexes
connected by fractures only
along the periphery of the
underlying sill.
We
show that the Tulipan sill is responsible for the dome structure in the
overburden of the study area. At the same time we see that not solely one of
the different
mecha
nisms of overburden deformation
can be responsible for the observed dome structure
, but
the combination of them.