Resumé
Geochemical sampling of stream sediment and water collected at a density of 1 sample per ~ 55 km2 has been carried out over the northernmost parts of the Caledonian fold belt and its
foreland in eastern North Greenland. The <0.1 mm fractions of the sediment samples were analysed by X-ray fluorescence, instrumental neutron activation and inductively coupled
plasma emission techniques, and are reported for 37 major and trace elements together with conductivity and fluoride contents of stream water samples.
The element distributions largely reflect compositions of drained bedrock lithologies, except for a 3CM-0 km wide belt along the margin of the Inland Ice characterised by low, flat
topography and very high Si02 contents in the stream silt samples. The fine-grained sediment in this belt is dominated by quartz sand and silt deposited on the platform by Quaternary -
recent glacio-fluvial and aeolian processes. The high content of exotic clastic quartz depresses the true geochemical signature of the underlying lithologies.
The element distribution patterns suggest possibilities for: (1) Cr and Ni mineralisation associated with voluminous Middle Proterozoic basic igneous rocks in parts of their outcrop
area; (2) Au mineralisation associated with shear zones; (3) base metal mineralisation along thrust planes of Caledonian nappes.
foreland in eastern North Greenland. The <0.1 mm fractions of the sediment samples were analysed by X-ray fluorescence, instrumental neutron activation and inductively coupled
plasma emission techniques, and are reported for 37 major and trace elements together with conductivity and fluoride contents of stream water samples.
The element distributions largely reflect compositions of drained bedrock lithologies, except for a 3CM-0 km wide belt along the margin of the Inland Ice characterised by low, flat
topography and very high Si02 contents in the stream silt samples. The fine-grained sediment in this belt is dominated by quartz sand and silt deposited on the platform by Quaternary -
recent glacio-fluvial and aeolian processes. The high content of exotic clastic quartz depresses the true geochemical signature of the underlying lithologies.
The element distribution patterns suggest possibilities for: (1) Cr and Ni mineralisation associated with voluminous Middle Proterozoic basic igneous rocks in parts of their outcrop
area; (2) Au mineralisation associated with shear zones; (3) base metal mineralisation along thrust planes of Caledonian nappes.
| Originalsprog | Engelsk |
|---|---|
| Udgivelsessted | Copenhagen |
| Forlag | GGU |
| Antal sider | 67 |
| DOI | |
| Status | Udgivet - dec. 1994 |
Publikationsserier
| Navn | Open File Series Grønlands Geologiske Undersøgelse |
|---|---|
| Nummer | 19 |
| Vol/bind | 94 |
| ISSN | 0903-7322 |
Emneord
- Greenland
- North-East Greenland
Programområde
- Programområde 1: Data