Fróðskaparrit - 01.07.2004, Side 106

104
MERCURY IN THE FAROE ISLANDS — A REVIEW OF AVAILABLE DATA
Fig. 7 Bathymetríc map of the south-east parí of the Faroese terrítory where tltefirst exploratory dríllings are
located. The planned sediment sampling sitesfor the 2001 regional baseline are marked with numbered squares.
The squares 10, 11 and 12 are on the ridge in the Faroe-Shetland Channel. (Adaptedfrom Mannvik et al., 2002).
for Li, Cr, Fe, Ni, Cu, As, Sr, Ag, Cd, Ba
and Pb (Grøsvik et al., 2000). Sediment
grain-size and loss on ignition was also
analysed The content of particles <63 pm
varied between 0,3% and 20% with an av-
erage of 5,0 ±0,9% (excluding the results
from one station). The loss on ignition var-
ied between 2,4-4,2%. Summary results
from this study are given in Table 9 along
with those from the regional baseline in the
lst Licence Area in 2001 (Mannvik et al.,
2002). Results are given for the so called
conservative elements A1 and Li as well, as
these may be used to normalize the data of
the other metals to a natural background,
equivalent to what is done in the case of
moss studies but then using Fe.
In 2001 a regional, environmental base-
line in the Faroe-Shetland Channel was
done, based on sediment samples from 16
different stations with a sampling plan in-
volving three replicates inn all stations. The
scope of the baseline was prepared in coop-
eration with Faroese scientists according to
governmental guidelines and Norwegian
standards for environmental monitoring
around oil and gas-producing fields (SFT
1999) and included both biological analy-