Mathematics – Logic
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988metic..23..235p&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 23, Sept. 1988, p. 235-238. Research supported by DFG and Department of Energy, Mines, and Re
Mathematics
Logic
24
Geomagnetism, Gravitational Fields, Gravity Anomalies, Meteorite Craters, Canada, Geological Faults, Geomorphology
Scientific paper
The results of a new gravity survey show that the Haughton impact structure is associated with a 24 km diameter negative Bouguer gravity anomaly with a maximum amplitude of -12 mgal. A local minimum with a half-width of 2 km and an amplitude of -4 mgal is located at the center of the structure. A positive magnetic field total anomaly with a half-width of 0.6 km and an amplitude of 700 nT coincides with the local central gravity anomaly. The overall negative anomaly is explained by lowered rock densities due to impact-related fracturing in the crater area. The central gravity and magnetic anomalies are believed to be due to highly shocked and heated sedimentary and crystalline basement rocks forming the unexposed peak of the central uplift in the Haughton impact structure.
Blyth Robertson P.
Eckstaller Alfons
Pohl J. J.
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