PhD-position 'Dating individual diamond growth
zones: a first step towards quantifying the temporal evolution of the
mantle carbon cycle'
Specifications - (explanation)
| Function types | PhD positions |
|---|---|
| Scientific fields | Faculty of Earth and Life Sciences |
| Hours | 38.0 - 40.0 hours per week |
| Education | University Graduate |
| Job number | 14278 |
| Translations | en |
About employer | VU University Amsterdam (VU) |
Short link | www.academictransfer.com/24339 |
Apply for this job within 13 days
Job description
This
multi-technique PhD project is designed to validate if mineral
inclusions in diamond record the time of diamond growth. Newly developed
ultra-sensitive isotopic analysis applied to diamond, single silicate
and sulphide inclusions will determine if there is Sr-Nd-Pb isotope
equilibrium between the host diamond and minerals in individual growth
zones. Diamonds with multiple inclusions from four Botswana mines will
be studied (Orapa-Letlhakane-Damtshaa-Jwaneng). The methodology involves
spectroscopic characterization of growth zones before dating and stable
isotope analysis (C-O-N). Three-dimensional cathodoluminescence imaging
and electron backscatter diffraction techniques will establish if
specific mineral inclusions are syn- or proto-genetic with the host
diamond. The host diamond and multiple inclusions will then be analysed
isotopically (Sr-Nd-Pb). The aim is to establish if protogenetic
inclusions have reached isotopic equilibrium due to rapid elemental
diffusion in the mantle during diamond precipitation from a
volatile-rich medium. Re-Os dating of sulphides in the same growth zones
will validate the age data from both syn- and protogenetic silicate
minerals. The ultimate goal is to determine the number and timing of
different diamond forming events beneath individual mines and hence the
length- and time-scale over which diamond forming events operate and the
time taken to form individual diamonds.
multi-technique PhD project is designed to validate if mineral
inclusions in diamond record the time of diamond growth. Newly developed
ultra-sensitive isotopic analysis applied to diamond, single silicate
and sulphide inclusions will determine if there is Sr-Nd-Pb isotope
equilibrium between the host diamond and minerals in individual growth
zones. Diamonds with multiple inclusions from four Botswana mines will
be studied (Orapa-Letlhakane-Damtshaa-Jwaneng). The methodology involves
spectroscopic characterization of growth zones before dating and stable
isotope analysis (C-O-N). Three-dimensional cathodoluminescence imaging
and electron backscatter diffraction techniques will establish if
specific mineral inclusions are syn- or proto-genetic with the host
diamond. The host diamond and multiple inclusions will then be analysed
isotopically (Sr-Nd-Pb). The aim is to establish if protogenetic
inclusions have reached isotopic equilibrium due to rapid elemental
diffusion in the mantle during diamond precipitation from a
volatile-rich medium. Re-Os dating of sulphides in the same growth zones
will validate the age data from both syn- and protogenetic silicate
minerals. The ultimate goal is to determine the number and timing of
different diamond forming events beneath individual mines and hence the
length- and time-scale over which diamond forming events operate and the
time taken to form individual diamonds.
Requirements
• A completed MSc degree in the field of mineralogy-petrology-geochemistry, or similar relevant field;
• experience in the interpretation of complex mineralogy or geochemistry datasets;
• proven strong mineralogy or geochemistry analytical skills;
• excellent research and writing skills, proven by past accomplishments;
• good command of the English language;
• good communication skills and ability to work in an interdisciplinary team.
• experience in the interpretation of complex mineralogy or geochemistry datasets;
• proven strong mineralogy or geochemistry analytical skills;
• excellent research and writing skills, proven by past accomplishments;
• good command of the English language;
• good communication skills and ability to work in an interdisciplinary team.
PhD-position 'Dating individual diamond growth zones: a first step towards quantifying the temporal evolution of ... VU University Amsterdam (VU) - — AcademicTransfer
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