Exploring and Using the Magnetic Methods

Gravity and magnetic methods at the turn of the millennium

Geophysics ◽

10.1190/1.1444915 ◽

2001 ◽

Vol 66 (1) ◽

pp. 36-37 ◽

Cited By ~ 8

Author(s):

R. O. Hansen

Keyword(s):

Turn Of The Millennium ◽

Magnetic Methods ◽

Maximum Value ◽

Gravity And Magnetic ◽

New Instrumentation ◽

New Instruments

Innovation in the 1980s and 1990s has been dominated by new instrumentation. Only recently has processing and interpretation technology appeared which will extract the maximum value from the new instruments. In the following sections, the instrumentation advances are outlined. Processing and interpretation advances are sketched in the last section.

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Potencial of rock-magnetic methods in paleoecological reconstructions: case study of Mikhailovtsement reference section (Ryazan region)

Moscow University Bulletin. Series 4. Geology ◽

10.33623/0579-9406-2019-2-30-38 ◽

2019 ◽

pp. 30-38

Author(s):

I. A. Stepanov ◽

A. Yu. Kazansky ◽

D. N. Kiselev ◽

L. R. Kosareva ◽

M. A. Rogov ◽

...

Keyword(s):

Sea Level ◽

Basin Evolution ◽

Sea Level Fluctuations ◽

Level Change ◽

Magnetic Methods ◽

Moscow Syneclise ◽

Global Trend ◽

Paleoecological Reconstructions ◽

Reference Section

On the basis of detailed, combined rock-magnetic, lithological, and micropaleontological study of the Mikhailovtsement section of the Moscow syneclise (Ryazan region), the fluctuations in Central Russian Sea level in Callovian–Early Oxfordian were reconstructed. According to the variations of rock-magnetic parameters over the section, seven rock-magnetic intervals were established which correspond to different stages of basin evolution. These stages are compared with sea level fluctuations established on the basis of changes in the lithology of rocks and the ostracod complexes. In general, the nature of sea level change in Callovian–Oxfordian, revealed by combination of the methods during the study of Mikhailovtsement section coincides with global trend.

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Magnetic properties of PM in indoor/outdoor domestic environments

10.5194/egusphere-egu21-14416 ◽

2021 ◽

Author(s):

Aruã Da Silva Leite ◽

Melina Macouin ◽

Sonia Rousse ◽

Jean-François Leon ◽

Loïc Drigo ◽

...

Keyword(s):

Iron Oxides ◽

Cost Effective ◽

Tree Bark ◽

Indoor Environments ◽

Magnetic Mineralogy ◽

Magnetic Methods ◽

Tree Barks ◽

Domestic Environments ◽

One Year ◽

The City

<p>The finer fraction of the particulate matter (PM) is the most harmful health wise, as it has more capacity to reach deeper parts of the respiratory system. Among other constituents, PM also contains iron oxides, allowing for the use of magnetic methods in its investigation as proxies for the whole of PM. Those methods present advantages in comparison to traditional ones, being quick, cost effective and sensible to investigate iron oxides among PM.&#160;</p><p>To better understand the risks related to PM exposition in the domestic context, the assessment of magnetic parameters may be used in outdoor and indoor environments, giving us information on the concentration of iron oxides (and consequently, PM) and its dispersion from one environment to the other.&#160;</p><p>We developed a citizen sciences experiment in the city of Toulouse, France. Tree barks were used as bio-collectors. Garlands composed of tree bark pieces were distributed to the population in May-2019, and placed in both indoors and outdoors of flats and homes to capture PM. They were retrieved after one year. Measurement of magnetic susceptibility, ARM, SIRM, S -ratio and estimation of superparamagnetic concentration were performed. A total of 86 bio-collectors kits were successfully analyzed. The preliminary results indicate a higher concentration of iron oxides outdoors, with a mean difference between outdoor and indoor measurements of 6.58x10<sup>-9</sup>m<sup>3</sup>/kg and 1.38x10<sup>-5</sup>Am<sup>2</sup>/kg in susceptibility and SIRM respectively. The concentration of the SP fraction also follows this trend of higher outdoor values. The magnetic mineralogy is mostly dominated by low coercivity magnetite-like carriers.</p><div> <div> <div>&#160;</div> </div> <div> <div>&#160;</div> </div> </div>

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