[Geoldept] Fw: PhD opportunities at Durham University on magma mush structure and mobilisation

[Mai Sas]

Hi Geostudents,

One last email with awesome PhD opportunities!

Cheers,
Mai

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Mai Sas, Ph.D. (she/her)
Geochemistry Research Associate
Western Washington University
Geology Department, MS 9080
www.maysas.com<http://maysas.com/index.html>
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From: LORMAND, CHARLINE <charline.lormand at durham.ac.uk>
Sent: Friday, December 3, 2021 7:51 AM
To: Mai Sas <sasm at wwu.edu>
Subject: PhD opportunities at Durham University on magma mush structure and mobilisation

You don't often get email from charline.lormand at durham.ac.uk. Learn why this is important<http://aka.ms/LearnAboutSenderIdentification>

Hi Mai,



I hope this email finds you well. Can you please forward the following PhD opportunities to potential applicants?



There are two fully-funded PhD projects at Durham University, UK, with Dr Madeleine Humphreys part of the ERC-STEMMS grant on magma mush structure and mobilisation. The projects are funded for 3.5 years starting from October 2022 with fees paid at the UK rate.



  1.  A crystal’s eye view on mush magma storage and remobilisation (Dr Madeleine Humphreys, Dr Charline Lormand, Dr Julie Prytulak and Dr Richard Brooker)



This PhD project will use apatite geochemistry to define the timing of fluid exsolution (e.g. Humphreys et al. 2021, EPSL) relative to fractionation in samples from Hekla (Iceland) and the Canary Islands (Figure 1), in magmatic systems that are variably volatile-rich. The project will also investigate the crystal-scale makeup of the mush through textural analysis of melt-bearing nodules, glomerocrysts and phenocrysts of plagioclase, amphibole and clinopyroxene, targeting a comparison of the products of both large and small eruptions in both locations. The aim will be to link the timing of volatile phase saturation with crystal shape and texture constraints on the grain-scale mush structure and its consequent mechanical properties, and thus to interpret the pre-eruptive storage conditions and remobilisation mechanisms in these two settings.



  1.  The plutonic record of crystal mush storage and solidification (Dr Madeleine Humphreys and Dr Fabian Wadsworth)



This PhD project will use the shapes and textures of mush-forming minerals to investigate the primary accumulation conditions of the crystal mush. The geochemistry and spatial arrangements of crystals and interstitial material will be used to trace the progressive development of the mush structure, porosity and connectivity during solidification (e.g. Bryon et al. 1996 Mineralogical Magazine; Humphreys 2009 Journal of Petrology). Zoning features of plagioclase feldspar will be used to assess changes in shape during growth. The geochemistry of the accessory mineral apatite will be analysed to assess whether a record of the approach to volatile saturation is retained in plutonic rocks (e.g. Humphreys et al. 2021, EPSL).



More details are attached. For any informal enquiries about the project, please contact Dr Madeleine Humphreys, Durham University (madeleine.humphreys at durham.ac.uk<mailto:madeleine.humphreys at durham.ac.uk>).



Kind regards,

--

Dr Charline Lormand

Postdoctoral Research Associate

Department of Earth Sciences,

Durham University, Science Labs,

Arthur Holmes Building, Room 309,

Durham, DH1 3LE, UK

charline.lormand at durham.ac.uk<mailto:charline.lormand at durham.ac.uk>

Twitter: charlinator_as


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