scholarly journals Geophysical and geological field work on fault structures at the Igaliko peninsula, South Greenland

1983 ◽  
Vol 115 ◽  
pp. 75-79
Author(s):  
P Nyegaard ◽  
L Thorning
Keyword(s):  
Field Work ◽  
Uranium Mineral ◽  
Geophysical Field ◽  
Base Camp ◽  
Electromagnetic Methods ◽  
Uranium Exploration ◽  
Fault Structures ◽  
Uranium Minerals ◽  
Logistic Support ◽  
Geological Work

Uranium exploration carried out in South Greenland by the Syduran project in the last few years (Armour-Brown et al., 1981) has indicated that certain major E-W fauIt structures are features worthy of attention in this connection. During August 1982 geological and geophysical field work was carried out 10 km south-south-east of Igaliko (fig. 25) around a fauIt zone which had earlier given indications of the presence of uranium mineral occurrences. The object of the geological work was to map the surface within the geophysical grid and to make a gamma-radiation survey of the area. Pitchblende veins, found in connection with geochemical prospecting, were traced by trenching and were sampled. The object of the geophysical work was firstly to evaluate the usefulness of various electromagnetic methods for locating and mapping the structures in the Julianehåb granite which contain uranium minerals and secondly to evaluate the extent of the known uranium mineral occurrences. Logistic support was supplied by the Syduran project base camp at Dyrnes.

scholarly journals Geological mapping and mineral exploration in the Motzfeldt Centre of the Igaliko nepheline syenite complex, South Greenland

1985 ◽  
Vol 125 ◽  
pp. 56-60
Author(s):  
T Tukiainen
Keyword(s):  
Ad Hoc ◽  
Raw Materials ◽  
Mineral Exploration ◽  
Weather Conditions ◽  
Field Work ◽  
Geological Mapping ◽  
Base Camp ◽  
Uranium Exploration ◽  
Geophysical Investigations ◽  
Bad Weather

The mineral occurrences of the Motzfeldt Centre, discovered by the South Greenland regional uranium exploration programme (Armour-Brown et al., 1984, Tukiainen et al., 1984), are now being explored for their Nb and Ta potential under a project financed by the EEC's Resources and Raw Materials Programme and The Geological Survey of Greenland. Accompanying the mineral exploration several other investigations are being carried out, and there is a dose co-operation between the various groups working in the area. The 1984 field activities comprised geological mapping, geochemical and geophysical investigations, and mineral exploration. The field activities were supported by GGU's facilities at Narssarssuaq where Jørgen Lau acted as base camp manager. A Jet Ranger helicopter, chartered on an ad hoc basis from the Ice Reconnaissance Centre at Narssarssuaq, was used for camp moves, geological reconnaissance and servicing of the field teams. Despite the bad weather conditions which prevailed for most of the season the main objectives of the field work were achieved.

scholarly journals Geophysical field work on selected aeromagnetic anomalies in central West Greenland

1978 ◽  
Vol 90 ◽  
pp. 38-42
Author(s):  
L Thorning ◽  
L.B Jensen ◽  
C Marcussen ◽  
B.S Mielby ◽  
S.A Petersen
Keyword(s):  
Magnetic Susceptibility ◽  
East Coast ◽  
Field Work ◽  
Magnetic Anomalies ◽  
Digital Recording ◽  
Geophysical Field ◽  
Magnetic Parameters ◽  
Continuous Analog ◽  
Base Camp ◽  
Field Activity

During the airborne operations carried out in 1975 and 1976 (Thorning, 1976, 1977), limited field activity was undertaken on the ground, mainly with the purpose of obtaining measurements of magnetic susceptibility of rocks. In 1977 no airborne operations were carried out and the summer's field work was concentrated on ground surveys. As in previous years the base camp was at Søndre Strømfjord where also a continuous analog and digital recording magnetometer was functional during the summer. Three field teams were supported by boat and helicopter (fig. 14); L. B. J. and C. M. worked in three areas from field camps north of Søndre Strømfjord, mainly with the purpose of collecting orientated samples from rocks causing magnetic anomalies; B. S. M. and S. A. P.\worked from ca ps inland east of Sukkertoppen with a detailed survey of the Majorqaq anomaly; L.T. worked from the GGU cutter Kornerup in Nordre Strømfjord, from another boat on the east coast of Nordlandet north of Godthåb, and with helicopter south of Søndre Strømfjord and in the Holsteinsborg area studying the rocks and structures causing the magnetic anomalies and obtaining values of the magnetic parameters of these rocks.

scholarly journals Uranium exploration in the Qagssiarssuk area, South Greenland

1985 ◽  
Vol 125 ◽  
pp. 74-78
Author(s):  
P Nyegaard
Keyword(s):  
Stream Water ◽  
Field Work ◽  
Fault Zones ◽  
Water Sampling ◽  
Uranium Mineral ◽  
Exposed Area ◽  
Water And Sediment ◽  
Uranium Exploration ◽  
Research Programmes ◽  
Major Fault

FolIowing the promising results of the Syduran project (Armour-Brown et al., 1984) a spin-off project Sydex was initiated in April 1984. The project is financed under the Ministry of Energy's Research Programmes 1984 and field work was carried out in several areas in South Greenland this summer (Armour-Brown & Wallin, this report). This contribution describes the work in the Qagssiarssuk area (fig. 20). In connection with the prospecting a geophysical survey was also carried out (Thorning & Boserup, this report). The main objects of the field work were to prospect the granite and sandstone area west of Qagssiarssuk between Tunugdliarfik and Nordre Sermilik (fig. 25) by ground scintillometry and water sampling. The major fauIt zones and adjacent areas together with the sandstonel granite unconformity were investigated especiaIly. Water samples from both lakes and streams were collected to test the usefulness of the method in this very poorly exposed area. Pitchblende and other uranium mineral occurrences have previously been found in major fault zones in the western part of the area (fig. 25) (Armour-Brown et al., 1983). Radioactive thorium-dominated dykes have also been found (Hansen, 1968; Armour-Brown et al., 1982). Stream-water and sediment samples with anomalously high uranium are located within the prospected area (Armour-Brown et al., 1982).

Metasedimentary rocks, intrusions and deformation history in the south-east part of the c. 1800 Ma Ketilidian orogen, South Greenland: Project SUPRASYD 1996

1997 ◽  
pp. 60-65
Author(s):  
Adam A. Garde ◽  
Brian Chadwick ◽  
John Grocott ◽  
Cees Swager
Keyword(s):  
Field Work ◽  
Deformation History ◽  
The South ◽  
Present Contribution ◽  
East Part ◽  
Metasedimentary Rocks ◽  
Deformational History ◽  
Base Camp ◽  
History Of ◽  
Geological Map

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Garde, A. A., Chadwick, B., Grocott, J., & Swager, C. (1997). Metasedimentary rocks, intrusions and deformation history in the south-east part of the c. 1800 Ma Ketilidian orogen, South Greenland: Project SUPRASYD 1996. Geology of Greenland Survey Bulletin, 176, 60-65. https://doi.org/10.34194/ggub.v176.5063 _______________ The south-east part of the c. 1800 Ma Ketilidian orogen in South Greenland (Allaart, 1976) is dominated by strongly deformed and variably migmatised metasedimentary rocks known as the ‘Psammite and Pelite Zones’ (Chadwick & Garde, 1996); the sediments were mainly derived from the evolving Julianehåb batholith which dominates the central part of the orogen. The main purpose of the present contribution is to outline the deformational history of the Psammite Zone in the region between Lindenow Fjord and Kangerluluk (Fig. 2), investigated in 1994 and 1996 as part of the SUPRASYD project (Garde & Schønwandt, 1995 and references therein; Chadwick et al., in press). The Lindenow Fjord region has high alpine relief and extensive ice and glacier cover, and the fjords are regularly blocked by sea ice. Early studies of this part of the orogen were by boat reconnaissance (Andrews et al., 1971, 1973); extensive helicopter support in the summers of 1992 and 1994 made access to the inner fjord regions and nunataks possible for the first time.A preliminary geological map covering part of the area between Lindenow Fjord and Kangerluluk was published by Swager et al. (1995). Hamilton et al. (1996) have addressed the timing of sedimentation and deformation in the Psammite Zone by means of precise zircon U-Pb geochronology. However, major problems regarding the correlation of individual deformational events and their relationship with the evolution of the Julianehåb batholith were not resolved until the field work in 1996. The SUPRASYD field party in 1996 (Fig. 1) was based at the telestation of Prins Christian Sund some 50 km south of the working area (Fig. 2). In addition to base camp personnel, helicopter crew and the four authors, the party consisted of five geologists and M.Sc. students studying mafic igneous rocks and their mineralisation in selected areas (Stendal et al., 1997), and a geologist investigating rust zones and areas with known gold anomalies.

scholarly journals Facies mapping and reservoir evaluation of the Upper Permian Wegener Halvø Formation in Wegener Halvø, East Greenland

1989 ◽  
Vol 145 ◽  
pp. 84-87
Author(s):  
L Stemmerik ◽  
P.A Scholle ◽  
E Thomas ◽  
M Amendolia ◽  
F.H Henk ◽  
...  
Keyword(s):  
Field Work ◽  
Entire Period ◽  
Upper Permian ◽  
Reservoir Properties ◽  
East Greenland ◽  
Reservoir Evaluation ◽  
Logistic Support ◽  
Reservoir Potential ◽  
Joint Group

Field work was carried out from 17 July to 3 August by a joint group from ARCO, AGIP and GGU to evaluate the reservoir potential of the Upper Permian limestones in Wegener Halvø (fig. 1). The group was based south of Paradigmabjerg (fig. 1) and had a Bell 206 helicopter available tull-time during the entire period. Logistic support was provided by the ARCO base at Constable Pynt. The Upper Permian limestones in the Wegener Halvø area have been investigated previously by GGU (Stemmerik, 1979; Surlyk, 1983; Surlyk et al., 1984a,b, 1986a; Hurst et al., 1989). Diagenetic studies of the limestones (Scholle, 1986; Hurst et al., 1989) indicate that reservoir properties are expected mainly to occur in the bryozoan-cement mounds of the Wegener Halvø Formation. Accordingly, the 1988 programme concentrated on more detailed studies of these mounds and included a shallow drilling programme conducted by GGU (see Christiansen & Stemmerik, 1989).

scholarly journals The South Greenland regional uranium exploration project

1980 ◽  
Vol 100 ◽  
pp. 83-86
Author(s):  
A. B Armour-Brown ◽  
T Tukiainen ◽  
B Wallin
Keyword(s):  
East Coast ◽  
Field Work ◽  
The South ◽  
North West ◽  
The North ◽  
South West ◽  
Uranium Mineralisation ◽  
Uranium Exploration ◽  
Detailed Nature ◽  
Sampling Survey

The SYDURAN project completed the airborne gamma-spectrometer and geochemical sampling survey over some 14 000 km2 of south-west Greenland from the fjord Sermiligarssuk in the north-west to Kap Farvel in the south and up the east coast as far as the southern shore of Lindenows Fjord. This covered all the Ketilidian structural zones and a small area of Archaean as classified by Allaart (1976) (fig. 29). Geological field work and prospecting of a more detailed nature was carried out in five areas where previous work indicated possibie uranium mineralisation.

scholarly journals 1:500 000 mapping of the Thule district, North-West Greenland

1976 ◽  
Vol 80 ◽  
pp. 23-28
Author(s):  
P.R Dawes
Keyword(s):  
Weather Conditions ◽  
Field Work ◽  
Economic Potential ◽  
West Greenland ◽  
North West ◽  
Field Investigations ◽  
Field Season ◽  
Logistic Support

Field investigations aimed at the produetion of a 1:500 000 map sheet of the Thule distriet were continued during August and early September. The unusuaIly poor weather conditions and the premature arrival of the winter's snowfall, reduced the season to some 20 effective working days. The field work was in two parts. At the beginning of the season a Jet Ranger helicopterwas chartered at Thule Air Base and four days were spent investigating nunatak and inland areas north of Savigsivik and Kap York and at the heads of Wolstenholme Fjord, Olrik Fjord and Inglefield Bredning. The second part was an investigation ofthe Proterozoic Thule Groupon Herbert ø, Northumberland Ø and Hakluyt Ø. Transport for this phase wasa locally hired boat from Avatak Henson of Moriussaq. Certain logistic support was supplied to H. R. Cooke who visited the Thule district at the end of the field season to assess the economic potential of various minerallocalities. Kurt Thomsen ably assisted both in Cooke's and the author's field programmes.

scholarly journals Prospecting for uranium in central East Greenland

1975 ◽  
Vol 75 ◽  
pp. 107-110
Author(s):  
B.L Nielsen ◽  
A Steenfelt
Keyword(s):  
Field Work ◽  
Atomic Energy ◽  
East Greenland ◽  
Field Investigations ◽  
Base Camp ◽  
Sampling Programme

The uranium prospecting programme commenced in East Greenland between 72° and 76°N in 1973 was continued during 1974 and included airborne radiometric surveying, field investigations in anomalous areas and a geochemicai sampling programme. Some of the results of the field work and the geochemical work are described here. The prospecting activity was accomplished in collaboration with the Danish Atomic Energy Commission's Research Establishment, Risø, and Rheinisch-Westfiilische Technische Hochschule, Aachen. The field parties and the airborne prospecting work were served by a helicopter and aircraft chartered from Heliswiss, Bern and Greenlandair Charter A/S. Stordal, west of Hold with Hope, was the base camp for all operations. During August, some of the field teams were served by the GGU cutter Jytte.

scholarly journals Reconnaissance work in the Triassic of the Wandel Sea Basin, eastern North Greenland

1977 ◽  
Vol 85 ◽  
pp. 11-15
Author(s):  
E Håkansson ◽  
C Heinberg
Keyword(s):  
Air Force ◽  
Field Work ◽  
Regional Mapping ◽  
Structural Detail ◽  
The North ◽  
Single Section ◽  
North Eastern ◽  
Logistic Support ◽  
North Eastern Part ◽  
North Greenland

The North-eastern part is one of the geologically least known areas in Greenland and although late Palaeozoic, Mesozoic and Tertiary strata are known to comprise the Wandel Sea basin, litlIe stratigraphical and structural detail is available (for summaries see Peel et al., 1974; Dawes, 1976). As a forerunner to GGU's forthcoming regional mapping project in northern Greenland, a reconnaissance tour to the Wandel Sea basin was attempted through the courtesy of the Royal Danish Air Force. However, due to partial failure in logistic support the field work was severely restricted and only part of the eastern Peary Land sequence was visited. Here only a single section was measured.

Formation of Secondary Uranium Minerals in the Koongarra Deposit, Australia

1993 ◽  
Vol 333 ◽  
Author(s):  
Hiroshi Isobe ◽  
Rodney C. Ewing ◽  
Takashi Murakami
Keyword(s):  
Northern Territory ◽  
Accessory Mineral ◽  
Migration Behavior ◽  
Graphite Layer ◽  
Uranium Mineral ◽  
Oxidation Condition ◽  
Uranyl Phosphates ◽  
Alteration Processes ◽  
Uranyl Silicates ◽  
Uranium Minerals

ABSTRACTSecondary uranium minerals from the Koongarra deposit, Northern Territory of Australia, were examined in order to understand the formation and alteration processes of the uranium minerals and their relevance to the migration behavior of uranium, lead, calcium and rare earth elements in the weathered zone. In most of the secondary ore zone, the only stable uranium mineral was saléeite (Mg(UO2)2(PO4)2·10H20), occurring as euhedral platy crystals up to 1 mm in length in veins and at surfaces. Apatite (Ca5(PO4)3F), an accessory mineral of the host rock, has saléeite reaction rims, suggesting formation at the expense of apatite. Ca-uranyl phosphates, such as autunite (Ca(UO2)2(PO4)2·10H2O), were not identified, and Ca-rich uranyl silicates are also absent in the primary ore zone. Pb-bearing uranyl phosphates were found only in the graphite layer cross-cutting the secondary ore zone. In the graphite layer, the local low oxidation condition and high hydrocarbonate content of ground water have affected the formation of uranium minerals and the migration behavior of uranium.

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