Abstract
During the 1984 field season potential hydrocarbon source rocks were studied in central and western North Greenland. Samples from most lithostratigraphic units were collected from Freuchen Land in the north-east to Washington Land in the south-west. Preliminary results from LECO, Rock-Eval and palynofacies analyses suggest that some intervals in the Cambrian shelf sequence and in the Ordovician and Silurian trough sequence have enough organic matter to qualify as source rocks. Most of the trough sequence is, however, thermally postrnature with respect to oil generation and only the Cambrian Brønlund Fjord Group is expected to have been the source of the oil accumulations in the subsurface.
Highlights
During the 1984 field season potential hydrocarbon source rocks were studied in central and western North Greenland
Similar investigations have previously been undertaken to the east, in the Peary Land region and central North Greenland (Rolle, 1981; Rolle & Wrang, 1981)
This paper presents the results of the initial screening of the collected material by pyrolysis and optical studies of organic matter in the sediments
Summary
600 samples were collected during the 1984 scason covering the main part of the region (fig. 1). 600 samples were collected during the 1984 scason covering the main part of the region More lhan 200 af these were selected for iniliallaboratory analyses (Tab le I). Spe~ cial emphasis was plaeed 011 analysing a large number of shale samples from the Lafayeue Bugt and Wulff Land Formations (Hurst, 1980; Hursl & Surlyk, (982) OUlCTopping along the Silurian platform margin. A large number of dark dolomite and limestone samples from the Ordovician shelf scquence were selected for analysis. The Cambrian limestones and sha!cs, known to have a source potential in Peary Land, only outcrop in the eastern part of the stutlicd area, from where a limited number of samples have bccn analysed. A smaller number of samples from most af the other formations have a1so been studied
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