Abstract
The third season, 1970, of the five year mapping programme in the Scoresby Sund area lasted slightly more than two months. As in the previous years the expedition was based on a special polar vessel which carried two Bell helicopters. The ship used was the 2675 ton "Perla Dan", which with a crew of 25 supported 3 smaller boats. The expedition members numbered 43, comprising 16 geological two- or three-man teams, and supporting personnel. The geological teams were divided into several working groups. Eight two-man parties worked in the crystalline complex in the inner fjord region around Rødefjord and on Milne Land. One party mapped the upper Palaeozoic sediments at Rødefjord. Five parties mapped the Mesozoic rocks on Milne Land and on south-eastern Jameson Land (see Birkelund, this report); three of these parties, in addition to mapping, undertook special palaeontological investigations along the west coast of Rurry Inlet and were financiaIly supported by the Carlsberg Foundation. One party worked in the Tertiary basalt on southeastern Milne Land and north-west Gåseland, and one party undertook a Quaternary geological investigation in the central part of the inner fjord zone.
Highlights
The third season, 1970, of the five year mapping programme in the Scoresby Sund area lasted slightly more than two months
6000 km2 were mapped in the crystalline complex and about 1200 km2 in the Mesozoic sediments at a scale of l
In the part of the inner Scoresby Sund region hitherto mapped by GGU it has been possibie to distinguish the following main units among the crystalline rocks: l) a pre-Caledonian basement more or less reworked by the Caledonian events ; 2) two supracrustal sequences - the Charcot Land sequence and the Krummedal sequence - of which the former could be of a pre-Caledonian age and the latter could correspond to deposits formed in the Caledonian geosync1ine; 3) Caledonian migmatites mainly forrned by migmatisation of rocks belonging to the Krummedal supracrustal sequence, and 4) syn- to post-kinematic intermediate to acid intrusions mainly confined to the migmatite region (Henriksen & Higgins, 1970)
Summary
The third season, 1970, of the five year mapping programme in the Scoresby Sund area lasted slightly more than two months. The expedition members numbered 43, comprising 16 geological two- or three-man teams, and supporting personnel. Eight two-man parties worked in the crystalline complex in the inner fjord region around Rødefjord and on Milne Land. Five parties mapped the Mesozoic rocks on Milne Land and on south-eastern Jameson Land (see Birkelund, this report); three of these parties, in addition to mapping, undertook special palaeontological investigations along the west coast of Rurry Inlet and were financiaIly supported by the Carlsberg Foundation. One party worked in the Tertiary basalt on southeastern Milne Land and north-west Gåseland, and one party undertook a Quaternary geological investigation in the central part of the inner fjord zone. After three seasons' mapping the field work between 70°40' and 72°00' N in the inner fjord zone is almost completed
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