Vacancies

GEM-RG receives the interested as Visiting scientists, Post-docs, PhD students, MSc students and Apprentice. Interested professionals can join for Research work (see Projects) or for Training (training or training through research) (see Training). They can be either located at GEM-RG in Hungary or join virtually only from any place (apart from the Apprentice who must be located at GEM-RG).

Positions offered have two categories:

  • paid position or job, and
  • research position for defined research topics.

Paid Positions are offered when funds are available from Funded Projects, for example. Paid Positions have tasks pre-defined by the GEM-RG funded project. Research Positions are simply research topics offered by GEM-RG for joint research or for PhD thesis work, for example. Research Position can be based on research topics offered by GEM-RG (see below) or the topic can be brought by the interested. For example, a PhD student can ask for thesis advising for his/her own thesis topic. At the moment, only Dr. Gyozo Jordan GEM-RG Research Group Leader can act as thesis advisor.

How to raise funds is detailed in Students&Visitors section.

 

Paid positions

No paid position is available at the moment.

 

Research Positions

Research topics offered by GEM-RG for joint research:

 

CONTAMINATON SOURCE CHARACTERISATION

1. mine waste rock dump characterisation

More than 50 samples were taken from the top 10 cm of two waste rock dumps of epithermal hydrothermal Cu-Ag deposit mines (Recsk Copper Mines, Hungary) along regular grids and analysed for total toxic element content. Another dataset consist of 2 vertical sections in each of these dumps sampled at depth intervals of 50 cm and analysed for toxic elements, mineral composition (XRD, SEM) and granulometry.

Objective: based on the above data, a detailed geochemical control process description and modelling of waste material, with special attention to depth dependence.

See Projects for on-going research activities.

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2. leaching tests

A great number of various leach tests (static tests) such as ANC, EPA 1310, EPA 1320, TCLP (EPA 1311), NAG and ABA tests have been performed on samples from (1) epithermal hydrothermal Cu-Ag deposit mine waste and (2) calcite containing vein-type polymetallic Pb-Zn deposit mine waste in the Recsk Copper Mines, Hungary. Tests include sequential  extraction results and total composition analyses, together with detailed mineralogical data. USGS Fast Field Test results are also available. Mineral composition (XRD, SEM) and granulometry data are present, too.

Objective: based on the above unique dataset, an evaluation and comparison of various tests and their efficiency and relevance in terms of geochemical toxic element mobility controlling processes.

See Projects for on-going research activities.

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3. geochemical characterization of toxic element mobility in red mud – the Ajka catastrophe case

The following data is available for the red mud spill in the Ajka:

Leaching with different solvents (mobility tests) for heavy metals:

  • Leaching with deionized water (pH at the end was about 10)
  • Leaching with ammonium acetate (pH at the end was about 8)
  • Leaching with acetic acid (pH=8; 5 and 3)

Total decomposition:

  • Aqua regia (heavy metals)
  • Total decomposition by mixed acids (HCl, HNO3, HF) in microwave unit (heavy metals)
  • Decomposition by LiBO2 in platinum crucible (major components, REE)
  • XRF measurements

Mineral composition (XRD, SEM) and granulometry data are also available.

Objective: based on the above extensive dataset, geochemical characterization of toxic element mobility in the red mud under various geochemical conditions. A further objective is to relate mineralogical composition to toxic element content and mobility.

See Projects for on-going research activities.

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CONTAMINATON PATHWAY CHARACTERISATION

4. contaminated catchment – high-resolution geochemical mapping using stream sediment and water analyses

More than 120 stream sediment samples were collected and analysed according to FOREGS Geochemical Atlas of Europe standards for toxic elements in the 10×10 km Recsk Mining Area catchment hosting two epithermal hydrothermal mineralisations (low and high sulphidation), a polymetallic mineralization, an alunite deposit and known hydrothermal alteration zones. Granulometric data together with heavy mineral separation and interpretation is available. Most importantly, all the rock types outcropping in the catchment have been analysed based on the 1:25,000 geological map. This unmatched database enables the very detailed geochemical map of the catchment and linking the natural geochemical background and mining effect to the observed contamination distribution.

Objective: Identification and separation of natural geochemical background and mining effects, linking sources and anomalies using GIS technology. A further objective is to support numerical catchment-based soil erosion, sediment and contamination transport modelling, see below.

See Projects for on-going research activities.

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5. contaminated catchment – transport modelling and landscape analysis

With the available abundant geochemical data (stream sediment, rock, mine waste chemistry) numerical catchment-based distributed soil erosion, sediment and contamination transport modeling is carried out, together with landscape geochemical (LG) spatial modeling with GIS in two contaminated catchments:

  • Recsk Mining Area, Hungary
  • Baiut Mining Area, Romania.

A third test are is the Ajka bauxite/red mud contaminated catchment.

LG uses detailed soil chemistry data and maps (Recsk Mining Area) to identify geochemical barriers and corridors for contamination.

Objective: Carrying out numerical contamination transport modeling and spatial analysis along the source-pathway-receptor chain in mining-contaminated small catchments. The study carries the possibility of comparative studies among the test catchments as well.

See Projects for on-going research activities.

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CONTAMINATON RECEPTOR CHARACTERISATION

6. floodplain

More than 5 transects were sampled across the Varatic Creek with 1-3m deep boreholes in the active floodplain (agricultural landuse) and higher-lying terraces (old floodplain). This gives altogether minimum of 4 borehole drilling on either side of the creek along the transects, together with the stream sediment sample collected in the middle. The obtained floodplain sediment cores are analysed for toxic element content and granulometry, for a total of ca. 300 samples. OSL dating of sediments is also available for selected samples.

Objectives:

  • The first objective is the development of a 3D digital geochemical map the floodplain contamination and it interpretation in terms of fluvial dynamics.
  • Second, the geochemical process modelling of contamination using statistical inference and multivariate data analysis techniques.
  • Third, an analysis of historic contamination (from medieval age mining to modern industrial mining and recent mine closure) using spatial (vertical) contamination distribution and sediment age data.

See Projects for on-going research activities.

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METHODS

7. contamination risk assessment methods

There are various contamination risk assessment methods with strength and weaknesses. Computer applications have been developed at GM-RG for various contamination risk assessment methods (e.g. EU Preliminary RA Protocol, EA PRAMS) that is to be tested for parameter sensitivity and uncertainty using error propagation and uncertainty analysis such as Monte Carlo methods. Results are tested against (1) nation-wide mine waste contamination inventory data and (2) catchment-scale detailed contamination measurement and modelling data.

Objective: The objective of this research is the development, testing and comparison of numerical contamination risk assessment methods in terms of uncertainty and sensitivity. Results are compared against regional inventory data and catchment-scale measurement data.

See Projects for on-going research activities.

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8. numerical modelling

To be announced.

Objective:

See Projects for on-going research activities.

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9. TSA and signal processing for geochemical observation data

To be announced.

Objective:

See Projects for on-going research activities.

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10. mobile GIS

To be announced.

Objective: To test

See Projects for on-going research activities.

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DIGITAL TERRAIN MODELLING AND 3D DIGITAL GEOLOGICAL MODELLING

11. DEM

To be announced.

Objective:

See Projects for on-going research activities.

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12. 3D modelling

To be announced.

Objective:

See Projects for on-going research activities.