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M.W.L.
Monster, MSc
Paleomagnetic
Laboratory
Fort
Hoofddijk
Department
of Earth Sciences
Utrecht
University
Budapestlaan
17, 3584 CD Utrecht
The Netherlands
Phone
+31 30 253 1361
E-mail M.W.L.Monster@uu.nl
 Research
Publications
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Research
of Marilyn Monster
Evaluation
of the domain-size corrected multi-specimen parallel differential pTRM
method:
A
test
on historical lavas at La Palma
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| Reliable
absolute palaeointensities
are needed to determine the full vector variation of Earth’s
magnetic field
as a function of geological time. However, the classic
Thellier-Thellier
method, on which most current methods are based, has a very low success
rate, is extremely time-consuming and can only be applied to very few
specimens.
A new
method of determining
absolute palaeointensities was proposed by Dekkers and Böhnel in
2006.
This multispecimen parallel differential pTRM method is based on the
linearity
of pTRM with inducing field, a property that is independent of domain
state.
It is much faster than Thellier-Thellier-type experiments, and as long
as no alteration occurs, it can be used for all magnetic grains.
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| However,
especially for intermediate grain sizes, this method seems to
overestimate
palaeo- intensities. To solve this problem, Fabian and Leonhardt (in
press) proposed a new protocol that uses three additional steps, in
which the overprinted pTRMs are isolated, an estimate of the domain
state
is made, and chemical alteration is detected. This method has thus far
only been tested on synthetic specimens.
In this
project, which
is supervised by Lennart de Groot, the Fabian-Leonhardt protocol will
be
evaluated by testing it on historical lava flows on La Palma, one of
the
Canary Islands. A first field work took place in the summer of 2010
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Drilling
in lava flows on La Palma
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...
Sampling
a lava flow - and a sampled one - at La Teneguia (La Palma)
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 Publications
of Marilyn Monster
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2010
- S. Semraua,
M.W.L. Monster, M. van der Knaap, B.I. Florea, T. Schmidt and M.
Overhand
(2010). Membrane lysis by gramicidin S visualized in red blood cells
and
giant vesicles, Biochim. Biophys. Acta, 1798,
2033-2039.
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