R. Boe et Jr. Skilbrei, STRUCTURE AND SEISMIC STRATIGRAPHY OF THE GRIPTARANE AREA, MORE BASINMARGIN, MID-NORWAY CONTINENTAL-SHELF, Marine geology, 147(1-4), 1998, pp. 85-107
The Mesozoic succession on the landward side of Griptarane, offshore m
id-Norway, reflects an upward change from Lower Jurassic alluvial depo
sits to Middle Jurassic marine/continental deposits into Upper Jurassi
c-Lower Cretaceous marine deposits. In the latest Jurassic there was d
eposition of submarine fans along faults associated with major extensi
onal deformation and fault block rotation, probably in Volgian times.
This phase coincided with NW-SE extension and rifting in the Slorebotn
Sub-basin and at Haltenbanken. An onlap surface is interpreted to rep
resent the Kimmerian unconformity and to mark the approximate position
of the Jurassic-Cretaceous boundary. Some WNW-ESE- to E-W-oriented fa
ults exhibit reverse movements, while E-W-trending folds indicate N-S
compression. This compression is interpreted to coincide with a late E
arly Cretaceous phase of sinistral transpression in the Gossa High and
Slorebotn Sub-basin, and inversion and doming in the More and Voring
Basins. The predominance of WNW-ESE- to NW-SE-and ENE-WSW- to NE-SW-tr
ending structures indicates that the Griptarane area has been influenc
ed by the stress regimes of the More-Trondelag Fault Complex as well a
s the stress regimes in the regions further offshore. (C) 1998 Elsevie
r Science B.V. All rights reserved.