AN Re-Os DATE FOR MOLYBDENITE-BEARING QUARTZ VEIN MINERALIZATION WITHIN THE KANGERLUSSUAQ ALKALINE COMPLEX, EAST GREENLAND: IMPLICATIONS FOR THE TIMING OF REGIONAL METALLOGENESIS

2012 ◽  
Vol 107 (4) ◽  
pp. 713-722 ◽  
Author(s):  
D. A. Holwell ◽  
D. Selby ◽  
A. J. Boyce ◽  
J. A. Gilbertson ◽  
T. Abraham-James
Keyword(s):  
Quartz Vein ◽  
Alkaline Complex ◽  
East Greenland ◽  
Vein Mineralization

Kochite, a new member of the rosenbuschite group from the Werner Bjerge alkaline complex, East Greenland

2003 ◽  
Vol 15 (3) ◽  
pp. 551-554 ◽  
Author(s):  
C. Claes Christiansen ◽  
Robert A. Gault ◽  
Joel D. Grice ◽  
Ole Johnsen
Keyword(s):  
Alkaline Complex ◽  
East Greenland

Temporal evolution of a long-lived syenitic centre: The Kangerlussuaq Alkaline Complex, East Greenland

Lithos ◽  
2006 ◽  
Vol 92 (1-2) ◽  
pp. 276-299 ◽  
Author(s):  
Morten S. Riishuus ◽  
David W. Peate ◽  
Christian Tegner ◽  
J. Richard Wilson ◽  
C. Kent Brooks ◽  
...  
Keyword(s):  
Temporal Evolution ◽  
Alkaline Complex ◽  
East Greenland

Late Archean regional deformation and structural controls on gold-quartz vein mineralization in the northwestern Slave Province, N.W.T., Canada

1995 ◽  
Vol 32 (8) ◽  
pp. 1132-1154 ◽  
Author(s):  
Andrew P. G. Abraham ◽  
Edward T. C. Spooner
Keyword(s):  
Quartz Vein ◽  
Regional Scale ◽  
Fluid Pressure ◽  
Shear Zones ◽  
Ductile Deformation ◽  
Vertical Shear ◽  
Bay Area ◽  
Slave Province ◽  
Vein Mineralization ◽  
Abitibi Subprovince

Late Archean crustal accretion in the northwestern Slave Province is suggested to have involved approximately west-northwest–east-southeast directed horizontal compression that produced three episodes of deformation recognizable in the northwestern Anialik River igneous complex (ARIC) and Anialik River greenstone belt (ARGB). Observations show that the ARIC was probably emplaced as a series of synvolcanic sills prior to the earliest deformational event. Regional shortening produced a pervasive foliation, downdip lineations and folding in the ARGB, and an early, subsequently folded, foliation in the northwestern ARIC. Postfold ductile and brittle–ductile deformation produced regional- and outcrop-scale shear zones including the Sheeted Zone, which defines the ARIC–ARGB contact. Younger rocks of the northwestern ARGB appear to have been tectonically juxtaposed along the Sheeted Zone against the older rocks of the northwestern ARIC. Greater brittle response, enhanced permeability, and cyclical increases in fluid pressure led to the development and concentration of an anastamosing network of gold-quartz vein bearing shear zones in the ARIC. Steep to subvertical shear-related linear fabrics show that regional-scale and mineralized shear zones have a large component of vertical shear with predominantly east-side-up movement. The age relationships, proximity, and similarity of deformational structures in the Kangguyak gneiss belt, containing a craton-scale ductile deformation zone, and shear zones within the Arcadia Bay area, suggest contemporaneous development and regional late Archean structural relationships similar to those of shear zone hosted gold-quartz vein mineralization seen in the Abitibi Subprovince (Canada) and Yilgarn Craton (Australia).

The Petrography of Some Kainozoic Igneous Rocks, and of the Cape Parry Alkaline Complex, East Greenland

1932 ◽  
Vol 69 (11) ◽  
pp. 520-527 ◽  
Author(s):  
G. W. Tyrrell
Keyword(s):  
Short Note ◽  
Igneous Rocks ◽  
Chemical Analyses ◽  
Alkaline Complex ◽  
East Greenland ◽  
Comprehensive Account ◽  
General Geology ◽  
Igneous Activity ◽  
Small Collection ◽  
Recent Account

IN this paper it is proposed to give a brief account of the petrography of the Kainozoic igneous rocks collected by Mr. J. M. Wordie during the Cambridge Expedition to East Greenland led by him in 1926. A small collection of alkaline igneous rocks, but of less certain age, was also made from Cape Parry, and is briefly dealt with in this paper. As Mr. Wordie has written a short note on the geology of the Tertiary igneous rocks in his geographical paper, and as Dr. H. G. Backlund intends shortly to publish a much more comprehensive account of Tertiary igneous activity and rocks in East Greenland than is possible on the basis of the materials collected by the Cambridge Expedition, this paper aims only at making a brief record of the petrographical characters of the collection, and especially at recording three new chemical analyses, two of the Kainozoic basalts, and one of a riebeckitetrachyte from the Cape Parry alkaline complex. For the most recent account of the general geology of East Greenland, and for a connected summary of the Kainozoic igneous rocks collected by other expeditions, the reader is referred to memoirs by L. Koch and H. G. Backlund.

Lauge Koch's explorations in east Greenland

1934 ◽  
Vol s5-27 (160) ◽  
pp. 307-309
Author(s):  
C. Schuchert
Keyword(s):  
East Greenland

Ketilidian structure and the rapakivi suite between Lindenow Fjord and Kap Farvel, South-East Greenland

2000 ◽  
pp. 50-59
Author(s):  
Brian Chadwick ◽  
Adam A. Garde ◽  
John Grocott ◽  
Ken J.W. McCaffrey ◽  
Mike A. Hamilton
Keyword(s):  
Coastal Region ◽  
Field Work ◽  
Natural Environment Research Council ◽  
East Greenland ◽  
The North ◽  
Tectonic Processes ◽  
Field Investigations ◽  
North Eastern ◽  
Bad Weather ◽  
North Eastern Part

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Chadwick, B., Garde, A. A., Grocott, J., McCaffrey, K. J., & Hamilton, M. A. (2000). Ketilidian structure and the rapakivi suite between Lindenow Fjord and Kap Farvel, South-East Greenland. Geology of Greenland Survey Bulletin, 186, 50-59. https://doi.org/10.34194/ggub.v186.5215 _______________ The southern tip of Greenland is underlain by the Palaeoproterozoic Ketilidian orogen (e.g. Chadwick & Garde 1996; Garde et al. 1998a). Field investigations in the summer of 1999 were focused on the structure of migmatites (metatexites) and garnetiferous granites (diatexites) of the Pelite Zone in the coastal region of South-East Greenland between Lindenow Fjord and Kap Farvel (Figs 1, 2). Here, we first address the tectonic evolution in the Pelite Zone in that region and its correlation with that in the Psammite Zone further north. Then, the structure and intrusive relationships of the rapakivi suite in the Pelite Zone are discussed, including particular reference to the interpretation of the controversial outcrop on Qernertoq (Figs 2, 8). Studies of the structure of the north-eastern part of the Julianehåb batholith around Qulleq were continued briefly from 1998 but are not addressed here (Fig. 1; Garde et al. 1999). The field study was keyed to an interpretation of the Ketilidian orogen as a whole, including controls of rates of thermal and tectonic processes in convergent settings. Earlier Survey field work (project SUPRASYD, 1992–1996) had as its principal target an evaluation of the economic potential of the orogen (Nielsen et al. 1993). Ensuing plate-tectonic studies were mainly funded in 1997–1998 by Danish research foundations and in 1999 by the Natural Environment Research Council, UK. The five-week programme in 1999 was seriously disrupted by bad weather, common in this part of Greenland, and our objectives were only just achieved. Telestation Prins Christian Sund was the base for our operations (Fig. 2), which were flown with a small helicopter (Hughes MD-500).

Episodic tectono-thermal activity in the southern part of the East Greenland Caledonides

2000 ◽  
pp. 42-49 ◽  
Author(s):  
A. Graham Leslie ◽  
Allen P. Nutman
Keyword(s):  
Thermal Activity ◽  
Isotopic Data ◽  
Zircon Age ◽  
East Greenland ◽  
Original Series ◽  
Age Determinations

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Leslie, A. G., & Nutman, A. P. (2000). Episodic tectono-thermal activity in the southern part of the East Greenland Caledonides. Geology of Greenland Survey Bulletin, 186, 42-49. https://doi.org/10.34194/ggub.v186.5214 _______________ Isotopic data from the Renland augen granites of the Scoresby Sund region (Figs 1, 2) provided some of the first convincing support for relicts of potentially Grenvillian tectono-thermal activity within the East Greenland Caledonides. In Renland, Chadwick (1975) showed the presence of major bodies of augen granite (Fig. 2) interpreted by Steiger et al. (1979), on the basis of Rb–Sr whole rock and U–Pb zircon age determinations, to have been emplaced about 1000 Ma ago.

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