We describe the properties of the host galaxy of the gamma-ray burst GRB060510B based on a spectrum of the burst afterglow obtained with the Gemini North 8m telescope .
The galaxy lies at a redshift of z = 4.941 making it the fourth highest spectroscopically identified burst host .
However , it is the second highest redshift galaxy for which the quality of the spectrum permits a detailed metallicity analysis .
The neutral hydrogen column density has a logarithmic value of 21.0–21.2 { cm } ^ { -2 } and the weak metal lines of Ni , S and Fe show that the metallicity is in excess of a tenth of solar which is far above the metallicities in damped Lyman alpha absorbers at high redshift .
The tightest constraint is from the Fe lines which place [ Fe/H ] in excess of -0.8 .
We argue that the results suggest that metallicity bias could be a serious problem with inferring star formation from the GRB population and consider how future higher quality measurements could be used to resolve this question .