The results of studies of the heavy metal background level in the natural environment ofthe Qaumarujuk and Agfardlikavså fjords, adjacent to the lead-zinc mine Sorte Engel (= Black Angel) near Mârmorilik (71°07'N, 51°16'W), have been briefly communicated by Bondam & Asmund (1974), Asmund (1975), Bohn (1975) and BoIlingberg (1975). FuHdetails of the analyticaI results of these surveys have been reported in Danish elsewhere. (Vandkvalitetsinstituttet 1972; Grønlands Fiskeriundersøgelser et al., 1974; GGU et al., 1975). Since then, renewed sampling has been carried out, both in February and August 1974, and in April and September 1975, in order to follw closely the environmental dissemination of some heavy metals in the fjord region, due to disposal of tailings from the flotation plant adjacent to Agfardlikavsåfjord (fig. 18). This short communication deals with the content of certain heavy metals of bottom sediments, biological tissues and samples of sea water in the fjord regime after full production started in October 1973.
Early in 1972 Greenex NS obtained a license for mining operations of the zinc-Iead occurrence at Marmorilik in the Umanak district of central West Greenland. Tailings from the flotation plant, totalling approximately 450 000 tons/year, are dumped in the fjord Agfardlikavsa (fig. 4). Understandably the local population demanded assurance that no toxic effects would harm their main source of living - fishery of prawn and fish, and prior to mining the Ministry for Greenland set stringent limits for the levels of waste products permissible. In order to gain some knowledge of the natural background level of, in particular, heavy metals in an area so far unaffected by mining operations or industrial pollution, it was decided to investigate the natural environment before mining operations started in the autumn of 1973.
As part of an environmental background sampling program, carried out prior to the disposal of tailings from the lead-zinc concentration plant at Mlirmorilik into Agfardlikavsli, the recent bottom sediments of the fiord system around the township have been subjected to detailed analysis as to grain size distribution, mineral content and the distribution of certain trace elements. Meltwater streams from the nearby Inland Ice margin and from local glaciers carry finegrained primary mineral detritus into the adjacent fiords, in three different depositional environments. The bottom sediments can be correlated to the surrounding bedrock. The distribution pattern of a number of trace elements in the bottom sediments is partly related to their mineral content, partly to selective sorption processes which take place in the marine environment.
An account of The Geology and Mineralisation of the Mesters Vig area. It will be best expressed by dividing the descriptions into three different parts. Part I includes the general geology of the Mesters Vig area. It has been prepared by J. Bondam, Geological Survey of Greenland, Copenhagen. The description is a brief summary of the stratigraphy within the area, as it has been established by E. Witzig, Switzerland, former geologist of the Northern Mining Company). To this summary new field and laboratory observations have been added. The geological map has been published through the courtesy of the Northern Mining Company, Copenhagen. Part II deals with the structural relations of the Blyklippen veins, and their influence on ore deposition. The study has been accomplished by H. Brown, Northern Mining Company, during the years 1953 and 1954. Part III will be published later in connection with these two papers. This part will deal with the paragenesis of the ore depositions at Blyklippen.
A newly discovered, fluorite-bearing, calco-alkaline granite intrusive from the Frederikshaab District, Southwest Greenland, is described. The granite is closely related to some rapakivi granites, pyterlite and wiborgitc, from the Viipuri area, Finland, as described by Wahl (1925). The relation between this intrusive and other "younger intrusives" is discussed, with respect to the fluorine content of the group of younger intrusives (Wegmann, 1938).
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