Mathematics – Logic
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995geo....23..277h&link_type=abstract
Geology, vol. 23, Issue 3, p.277
Mathematics
Logic
22
Scientific paper
A strong magnetic anomaly near the center of the ancient and deeply eroded Vredefort structure is attributed to remanent magnetization caused by a large meteorite impact at ˜2.0 Ga. The rocks underlying the anomaly are Archean gneisses thought to represent mid-crustal depths that were uplifted to the surface during the postulated impact event. Measurements of the remanent magnetization of the basement rocks yielded consistent vectors of declination = 25° , inclination = 56° , k = 18, α = 16 that correspond to the paleomagnetic pole position at time of impact. Petrologic studies indicate that during impact, large volumes of rock were heated enough to cause thermal remagnetization in the ambient field. Thermal effects of all large impacts on cratons may induce a remanent magnetization of sufficient intensity to cause anomalies in the geomagnetic field that are detectable even by satellites.
Andreoli Marco A. G.
Hargraves Robert B.
Hart Rodger J.
Moctar Doucouré C.
Tredoux Marian
No associations
LandOfFree
Magnetic anomaly near the center of the Vredefort structure: Implications for impact-related magnetic signatures 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 Magnetic anomaly near the center of the Vredefort structure: Implications for impact-related magnetic signatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic anomaly near the center of the Vredefort structure: Implications for impact-related magnetic signatures will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-885573