Influence Factors on Magnetic Susceptibility of Marine Sedimentary Rocks

As the most basic environmental magnetic parameters,magnetic susceptibility plays an important role in the researches of stratigraphic division and correlation,reconstruction of paleoclimate and paleoenvironment.The controlling factors of magnetic susceptibility are definitive to guarantee the reliability of results.The sources of magnetic minerals in sediments are complex,which could be mainly divided into two groups:authigenic and detrital.Climate change,sea-level fluctuations,carbonate productivity,volcanism,and meteorite impacts could potentially make a contribution to the detrital sources of magnetic minerals.Besides,reduction of magnetic mineral,hydrothermal fluid activities and metabolism of magnetotactic bacteria could incorporate the formation of authigenic magnetic minerals.All of the processes mentioned above comprehensively have an influence on the magnetic susceptibility of sediments.