The Mjoelnir impact crater - revisited

Details The Mjoelnir impact crater - revisited The Mjoelnir impact crater - revisited

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufm.u23a0856w&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #U23A-0856

Physics

1027 Composition Of The Planets, 1060 Planetary Geochemistry (5405, 5410, 5704, 5709, 6005, 6008), 5420 Impact Phenomena, Cratering (6022, 8136)

Scientific paper

The Mjølnir impact crater was discovered in seismic reflection data in the 1990's, and the detailed structure is well established. The submarine crater, situated in the southwestern Barents Sea, has a crater diameter of about 40 km, and a shallow relief (about 50 m). The crater is buried under a layer of sediments. Stratigraphic relationships (drill core 7329/03-U01) indicate a Cretaceous formation age at around 140 Ma ago. Here, density and magnetic susceptibility measurements of core samples are presented and used to interpret a newly available aeromagnetic survey and gravity data, and to forward model the potential field anomaly data of the area, in order to better constrain the signature of the crater. We will also develop a detailed Cretaceous palaeogeographic reconstruction at the time of impact. This investigation is conducted to support future drilling at the Mjølnir impact site.

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