Physics
Scientific paper
Apr 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997e%26psl.148..109n&link_type=abstract
Earth and Planetary Science Letters, Volume 148, Issue 1, p. 109-127.
Physics
11
Scientific paper
The Cretaceous and Tertiary post-rift subsidence history of the northern North Sea and the Faeroe-Shetland Basins, formed by Jurassic and Cretaceous rifting, show substantial departures from McKenzie post-rift subsidence in the Early Tertiary. These departures can be explained by regional Palaeocene uplift, followed by rapid decay of this uplift in the Eocene through to the present day. Forward and reverse 2-D modelling of syn- and post-rift stratigraphy, using flexural isostasy, has been used to determine the magnitude and timing of this uplift event. In the north Sea Basin (NNSB), modelling predicts Palaeocene uplift to have been of the order of 375-525 m, increasing northwards. In the Faeroe-Shetland Basin, Palaeocene uplift is estimated to have been 900 m. The timing of Palaeocene uplift in the NNSB and northern Britain is consistent with the development of the Early Tertiary Icelandic plume (c. 64 Ma) or a related plume. Palaeocene uplift in the NNSB is attributed to dynamic uplift generated by mantle fluid flow driven by ascending hot plume material. Magmatic underplating or buoyancy from heated lithosphere are not believed to be significant mechanisms for regional Palaeocene uplift in the NNSB. The decay of Palaeocene uplift in the NNSB occurs more rapidly than predicted by simple conductive cooling of heated lithosphere. Rapid decay of uplift in the NNSB is attributed to a temperature decrease of the plume in the Early Eocene (c. 55 Ma), resulting in a decrease in dynamic uplift, and coincides with a decrease in volcanic activity within the British Tertiary and Greenland Igneous Provinces, and the initiation of sea-floor spreading between Greenland and northwest Europe. The plume responsible for Palaeocene uplift in the NNSB and northern Britain may have been located in the Faeroe-East Greenland area, although a smaller transient plume within the British Tertiary Igneous Province may also have contributed to uplift.
Cheadle Michael J.
Kusznir N. J.
Nadin P. A.
No associations
LandOfFree
Early Tertiary plume uplift of the North Sea and Faeroe-Shetland Basins does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Early Tertiary plume uplift of the North Sea and Faeroe-Shetland Basins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Early Tertiary plume uplift of the North Sea and Faeroe-Shetland Basins will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1317667