Investigation of rocks with low remanent magnetization exemplified by limestones from Limhamn, Sweden |
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| Authors: | B A Sjberg |
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| Institution: | The Stockholm Paleomagnetic Laboratory, Institute of Geology and Geochemistry, Stockholm University, S-106 91, Stockholm, Sweden |
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| Abstract: | A 290 m sequence of Maastrichtian and Danian limestones from Limhamn, southern Sweden, has been investigated magnetically. The observed mean natural remanent magnetization is 24 μ A m−1. The remanent magnetization is carried by pseudo-single-domain or single-domain magnetite particles, and was observed by various rock magnetic methods. Though influenced by diamagnetism, the anisotropy was determined. Paleomagnetically, polarity changes could be determined in several samples in spite of the low remanences measured. The results are in agreement with the magnetostratigraphy based upon ocean floor anomalies. |
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