Macedonia: a superficial democracy in the shadow of crises. OSW COMMENTARY NUMBER 206/31.03.2016

Until 2008, Macedonia was leading the process of EU and NATO integration, and (after Croatia) was the fastest-reforming Western Balkan country. However, since Macedonia’s negotiations on joining the EU and NATO were blocked, in connection with its dispute with Greece, the Macedonian government has moved away from a policy of reform towards reinforcing its autocratic system and consolidating society behind nationalist slogans. Also the EU, which had hitherto been the driving force behind the changes, has due to its internal crises been paying little attention to violations of democratic standards in the Republic of Macedonia, tensions in relations between the Slavic Macedonians and the Albanian minority (which make up over 25% of the population), and the country’s permanent political domestic crises.

Helium in solubility equilibrium with quartz and porefluids in rocks - a new approach in hydrology

Quartz crystals in sandstones at depths of 1200 m–1400 m below the surface appear to reach a solubility equilibrium with the 4He-concentration in the surrounding pore- or groundwater after some time. A rather high 4Heconcentration of 4.5x10E-3 cc STP 4He/cm3 of water measured in a groundwater sample would for instance maintain a He pressure of 0.47 atm in a related volume. This value is equal within analytical error to the pressure deduced from the measured helium content of the quartz and its internal helium-accessible volume. To determine this volume, quartz crystals of 0.1 to 1 mm were separated from sandstones and exposed to a helium gas pressure of 32 atm at a temperature of 290°C for up to 2 months. By crushing, melting or isothermal heating the helium was then extracted from the helium saturated samples. Avolume on the order of 0.1% of the crystal volume is only accessible to helium atoms but not to argon atoms or water molecules. By monitoring the diffusive loss of He from the crystals at 350°C an effective diffusion constant on the order of 10E-9 cm2/s is estimated. Extrapolation to the temperature of 70°C in the sediments at a depth of 1400 m gives a typical time of about 100 000 years to reach equilibrium between helium in porewaters and the internal He-accessible volume of quartz crystals. In a geologic situation with stagnant pore- or groundwaters in sediments it therefore appears to be possible with this new method to deduce a 4He depth profile for porewaters in impermeable rocks based on their mineral record.