Measuring, Processing, and Analyzing Hysteresis Data

Paterson, Greig A.; Zhao, Xiang; Jackson, Michael J.; Heslop, David

doi:10.1029/2018gc007620

Cited by 85 publications

(64 citation statements)

References 36 publications

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“…High-field slope correction was performed on measured hysteresis loops to correct non-saturating components using the algorithm of Paterson et al (2018). High-field slope correction was performed on measured hysteresis loops to correct non-saturating components using the algorithm of Paterson et al (2018).…”

Section: Paleomagnetic and Rock Magnetic Methodsmentioning

confidence: 99%

“…Geophysics, Chinese Academy of Science. High-field slope correction was performed on measured hysteresis loops to correct non-saturating components using the algorithm of Paterson et al (2018).…”

Section: Paleomagnetic and Rock Magnetic Methodsmentioning

confidence: 99%

“…The LTC curves of five samples from core BOB-24 exhibit clear Verwey transitions (Verwey, 1939) around 120 K as an indication of detrital magnetite (Chang et al, 2016). Hysteresis data were processed using HystLab (Paterson et al, 2018). The orange loops are raw data, while the blue ones are data after slope correction.…”

Section: Rock Magnetismmentioning

confidence: 99%

“…Magnetic susceptibility rapidly descends to almost zero at around 580°C (Figure 6c), which indicates the dominance of magnetite. (Paterson et al, 2018). IRM acquisition curves were decomposed following the approach of Kruiver et al (2001).…”

Section: 1029/2018gc008100mentioning

confidence: 99%

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Paleomagnetic Secular Variations During the Past 40,000 Years From the Bay of Bengal

Wang

Chang

Xue

et al. 2019

Geochem Geophys Geosyst

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Paleomagnetic secular variations in South Asia are not well understood due to insufficient records. In this study, we produce a new paleomagnetic secular variation curve covering the past 40,000 years by stacking four marine sediment records from the middle portion of Bay of Bengal. Age models are based on radiocarbon dating and core correlation. Stepwise alternating field demagnetization was used to isolate the primary remanent component. Rock magnetic measurements indicate that the primary magnetic remanence carriers are single domain and pseudo‐single domain magnetites with no sign of diagenetic alteration. Our Bengal relative paleointensity stack is broadly consistent with local records and the PISO‐1500 relative paleointensity stack (Channell et al., 2009; https://doi.org/10.1016/j.epsl.2009.03.012). Two geomagnetic excursions presented by paleointensity minima are recognized, which correlate to the Mono Lake (29–32 ka) and Laschamp excursion (38–40 ka), respectively. We conclude that the Mono Lake and Laschamp excursion are two separate events.

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Section: Paleomagnetic and Rock Magnetic Methodsmentioning

confidence: 99%

Section: Paleomagnetic and Rock Magnetic Methodsmentioning

confidence: 99%

Section: Rock Magnetismmentioning

confidence: 99%

Section: 1029/2018gc008100mentioning

confidence: 99%

See 2 more Smart Citations

Paleomagnetic Secular Variations During the Past 40,000 Years From the Bay of Bengal

Wang

Chang

Xue

et al. 2019

Geochem Geophys Geosyst

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“…A maximum field of 1 T was used to magnetise the samples. Measurement results were processed using HystLab (Paterson et al, 2018).…”

Section: Magnetic Propertiesmentioning

confidence: 99%

The Arctic Ocean Manganese Cycle, an Overlooked Mechanism in the Anomalous Palaeomagnetic Sedimentary Record

et al. 2020

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Palaeomagnetic records obtained from Arctic Ocean sediments are controversial because they include numerous and anomalous geomagnetic excursions. Age models that do not rely on palaeomagnetic interpretations reveal that the majority of the changes in inclination do not concur with the established global magnetostratigraphy. Seafloor oxidation of (titano)magnetite to (titano)maghemite with self-reversal of the (titano)maghemite coatings has been proposed as an explanation. However, no existing model can explain when the self-reversed components formed and how they are linked to litho-stratigraphic changes in Arctic Ocean sediments. In this study, we present new palaeo-and rock magnetic measurements of a sediment core recovered from the Arlis Plateau, close to the East Siberian Shelf. The magnetic data set is evaluated in the context of the regional stratigraphy and downcore changes in physical and chemical properties. By cross-core correlation, we show that magnetic inclination changes in the region do not stratigraphically align, similar to results of studies of sediments from the Lomonosov Ridge and Yermak Plateau. Rock magnetic and chemical parameters indicate post-depositional diagenetic changes in the magnetic mineral assemblage that can be linked to manganese cycling in the Arctic Ocean. The potential presence of a magnetic remanence bearing manganese-iron oxide phase, which can undergo self-reversal, leads to an alternative hypothesis to primary seafloor oxidation of (titano)magnetite. This phase may form by precipitation from seawater or by changing redox conditions in the sediment column by mineral precipitation from ions dissolved in pore water. These findings highlight the need for further investigation into the magnetic mineral assemblage, its link to manganese cycling and pore water geochemistry in Arctic Ocean sediments.

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