MSP-Tool: A VBA-Based Software Tool for the Analysis of Multispecimen Paleointensity Data

Monster, M.; Groot, Loek; Dekkers, Mark J.

doi:10.3389/feart.2015.00086

Cited by 19 publications

(27 citation statements)

References 25 publications

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“…We used four field levels (15, 30, 45 and 60 μT) and three specimens per field level. Data were analysed using MSP-Tool for MS Excel 2010 (Monster et al, 2015b) and its built-in reliability criteria. If the average alteration ε alt between the first and fourth heating step exceeded 3% (de Groot et al, 2013) and/or if the intersection with the y-axis of the linear fit in the domain-statecorrected plot was not within error of its theoretically prescribed value of (0, −1) (Fabian and Leonhardt, 2010), the result from the original method (MSP-DB; Dekkers and Böhnel, 2006) was preferred.…”

Section: Sitementioning

confidence: 99%

“…If the average alteration ε alt between the first and fourth heating step exceeded 3% (de Groot et al, 2013) and/or if the intersection with the y-axis of the linear fit in the domain-statecorrected plot was not within error of its theoretically prescribed value of (0, −1) (Fabian and Leonhardt, 2010), the result from the original method (MSP-DB; Dekkers and Böhnel, 2006) was preferred. Data points that were outside the bootstrapped confidence interval (Monster et al, 2015b) that was initially produced based on the results of all measured samples were rejected and the data were reinterpreted omitting these data points.…”

Section: Sitementioning

confidence: 99%

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Full-vector geomagnetic field records from the East Eifel, Germany

Monster

Langemeijer

Wiarda

et al. 2018

Physics of the Earth and Planetary Interiors

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A B S T R A C TTo create meaningful models of the geomagnetic field, high-quality directional and intensity input data are needed. However, while it is fairly straightforward to obtain directional data, intensity data are much scarcer, especially for periods before the Holocene. Here, we present data from twelve flows (age range ∼ 200 to ∼ 470 ka) in the East Eifel volcanic field (Germany). These sites had been previously studied and are resampled to further test the recently proposed multi-method palaeointensity approach. Samples are first subjected to classic palaeomagnetic and rock magnetic analyses to optimise the subsequent palaeointensity experiments. Four different palaeointensity methods -IZZI-Thellier, the multispecimen method, calibrated pseudo-Thellier, and microwave-Thellier -are being used in the present study. The latter should be considered as supportive because only one or two specimens per site could be processed. Palaeointensities obtained for ten sites pass our selection criteria: two sites are successful with a single approach, four sites with two approaches, three more sites work with three approaches, and one site with all four approaches. Site-averaged intensity values typically range between 30 and 35 μT. No typically low palaeointensity values are found, in line with paleodirectional results which are compatible with regular palaeosecular variation of the Earth's magnetic field. Results from different methods are remarkably consistent and generally agree well with the values previously reported. They appear to be below the average for the Brunhes chron; there are no indications for relatively higher palaeointensities for units younger than 300 ka. However, our young sites could be close in age, and therefore may not represent the average intensity of the paleofield. Three of our sites are even considered coeval; encouragingly, these do yield the same palaeointensity within uncertainty bounds.

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Section: Sitementioning

confidence: 99%

Section: Sitementioning

confidence: 99%

Full-vector geomagnetic field records from the East Eifel, Germany

Monster

Langemeijer

Wiarda

et al. 2018

Physics of the Earth and Planetary Interiors

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“…Out of the 30 ARM-tests done, nine were successful; MSP-DSC experiments were carried out for these nine combinations of site and temperature. The MSP results were interpreted using MSP-Tool (Monster et al 2015). To deem the outcome of a MSP-DSC experiment reliable, the alteration induced during the experiment should be minimal: we therefore reject samples with |ε alt | > 5 per cent; and only accept sites that produce an average ε alt for all samples included in the interpretation between -3 and 3 per cent.…”

Section: Multispecimen Techniquementioning

confidence: 99%

The multimethod palaeointensity approach applied to volcanics from Terceira: full-vector geomagnetic data for the past 50 kyr

Groot¹,

Pimentel

Chiara

2016

Geophys. J. Int.

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S U M M A R YThe island of Terceira (38.5 • N, 27.2 • W) in the Azores Archipelago boasts a wealth of welldated recent volcanic products; it is therefore the ideal location to improve the resolution of the full-vector geomagnetic field record for the Mid-Atlantic Ocean. We investigated 21 (sub-)sites sampled from 10 different cooling units; six of these cooling units are from the Holocene, the other four are approximately coeval with the age of known geomagnetic excursions. After successfully determining the palaeodirections from all but one site, we applied the multimethod palaeointensity approach to all sites. Here, we used three different palaeointensity methods: the IZZI-Thellier protocol, the Multispecimen technique, and the calibrated pseudo-Thellier method. For the Holocene sites four robust palaeointensity estimates were obtained, they mostly agree with data from the nearby island of São Miguel and data from the Iberian Peninsula and West Africa. Two older sites, dated at 25.7 and 46.3 ka, produced low palaeointensities: 24.4 and 24.1 µT, respectively. As both the IZZI-Thellier and pseudo-Thellier methods yielded technically acceptable results for these sites we used them to improve the pseudo-Thellier calibration relation and establish its applicability to lower palaeointensities. Sixty per cent of all sampled cooling units/ages in our study yielded a technically successful palaeointensity estimate; this unusually high success rate is attributed both to our sampling strategy and the implementation of the multimethod approach.

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“…Biasing effects induced by pTRM tails are minimized by aligning the specimens' NRMs parallel to the field in the oven. The data analysis was performed using a MSP-TOOL software of Monster et al (2015) and are reported in Table 2 while some representative determinations are presented in Fig. 7.…”

Section: Sample Sr12-7mentioning

confidence: 99%

“…Multispecimen (MSP-DB) vs. FC (fraction corrected) and MSP-DSC (domain state corrected afterFabian and Leonhardt, 2010) absolute intensity determination (MSP-TOOL ofMonster et al, 2015).…”

mentioning

confidence: 99%