Magnetic Susceptibility Application: A Window onto Ancient Environments and Climatic Variations
Magnetic susceptibility (MS) is a tool frequently used by geologists on sediments or rocks to perform correlations and sea-level or climatic reconstructions. Applied measurements are made on unoriented, bulk samples and bulk MS is mostly influenced by the magnetic mineral content of the rock and often interpreted as influenced by detrital inputs. Magnetic data acquisition is fast and straightforward and this allows the high-resolution sampling needed for palaeoclimatic research (e.g. spectral analysis). However, the link with detrital inputs is not always preserved and the impact of diagenesis on the final MS signal can blur primary information. This volume includes contributions dealing with the origin of the magnetic minerals, and the application of MS as a palaeoenvironmental or palaeoclimatic proxy and also as a tool to provide astronomical calibration in order to improve the chronology of selected time intervals.
Forcing factors of the magnetic susceptibility signal in lagoonal and subtidal depositional cycles from the Zachełmie section (Eifelian, Holy Cross Mountains, Poland)
Published:January 01, 2015
J. Grabowski, M. Narkiewicz, D. De Vleeschouwer, 2015. "Forcing factors of the magnetic susceptibility signal in lagoonal and subtidal depositional cycles from the Zachełmie section (Eifelian, Holy Cross Mountains, Poland)", Magnetic Susceptibility Application: A Window onto Ancient Environments and Climatic Variations, A. C. Da Silva, M. T. Whalen, J. Hladil, L. Chadimova, D. Chen, S. Spassov, F. Boulvain, X. Devleeschouwer
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Eifelian dolomites in the Zachełmie Quarry exhibit metre-scale depositional cyclicity, both in the lower, lagoonal part of the section and in the upper, shallow subtidal portion. Magnetic properties were studied in 30 samples (at c. 1 m intervals), including magnetic susceptibility (MS) and anhysteretic and isothermal remanent magnetization. The rock magnetic parameters are compared with the results of thin-section study and elemental chemistry. The forcing factors driving the MS pattern are identified. The MS signal is mostly related to a finely dispersed hematite, controlled by terrigenous input. Magnetite plays a subordinate role and it is confined to less terrigenous...