Mafic dike swarms as absolute time markers in high-grade terranes: 40Ar/39Ar geochronological constraints on the Kangamiut dikes, West Greenland

Geology

Volumn 27, Issue 9, 1999, Pages 775-778

  Willigers, B J A ^a,c   Mengel, F C ^b   Bridgwater, D ^a   Wijbrans, J R ^a  

^a UNIVERSITY OF COPENHAGEN   (Denmark)

^b DANISH LITHOSPHERE CENTRE   (Denmark)

^c VU UNIVERSITY AMSTERDAM   (Netherlands)

Author keywords

[No Author keywords available]

Indexed keywords

ARGON; GEOCHRONOLOGY; HYDRAULIC STRUCTURES; TEXTURES;

COOLING PATH; DIKE EMPLACEMENTS; HIGH GRADES; MAFIC DIKES; METAMORPHIC COOLING; PALEOPROTEROZOIC; PROTEROZOIC; WEST GREENLAND;

LEVEES;

ARCHEAN; DIKE SWARM; EMPLACEMENT; HEATING; HORNBLENDE; IGNEOUS INTRUSION; LAYERED INTRUSION; LITHOSTRATIGRAPHY; OROGENY; PROTEROZOIC; GEOCHRONOLOGY; MARKER BED; TERRANE;

ARCTIC; GREENLAND; WEST GREENLAND; KANGAMIUT;

EID: 0033396354     PISSN: 00917613     EISSN: None     Source Type: Journal    
DOI: 10.1130/0091-7613(1999)027<0775:MDSAAT>2.3.CO;2     Document Type: Article

References (22)

1. Bridgwater, D., Keto, L., McGregor, V. R., and Myers, J. S., 1976, Archean gneiss complex of Greenland, in Escher, A., and Watt, W. S., eds., Geology of Greenland: Copenhagen, Geological Survey of Greenland, p. 77-95.
2. Bridgwater, D., Austrheim, H., Hansen, B. T., Mengel, F., Pedersen, S., and Winter, J., 1990, The Proterozoic Nagssugtoqidian mobile belt of southeast Greenland: A link between the eastern Canadian and Baltic shields: Geoscience Canada, v. 17, p. 305-310.
3. Connelly, J. N., and Mengel, F. C, 1999, Evolution of Archean components of the Nagssugtoqidian orogen, West Greenland: Geological Society of America Bulletin (in press).
4. Davidson, L. M., 1979, Nagssugtoqidian granulite faciès metamorphism in the Holsteinsborg region, West Greenland: Grönlands Geologiske UnderS0gelse Rapport 89, p. 97-108.
5. England, P. C., and Thompson, A. B., 1984, Pressuretemperature-time paths of regional metamorphism: I. Heat transfer during the evolution of regions of thickened continental crust: Journal of Petrology, v. 25, p. 894-928.
6. Escher, A., Escher, J. C., and Watterson, J., 1975, The reorientation of the Kangamiut dike swarm, West Greenland: Canadian Journal of Earth Sciences, v. 12, p. 158-173.
7. Hanes, J. A., 1987, Dating of Precambrian mafic dyke swarms by the Rb-Sr, K-Ar, and Sm-Nd method, in Halls, H. C, and Fahrig, W. F., eds., Mafic dike swarms: A-tollection of papers based on the proceedings of an international conference: Geological Association of Canada Special Paper 34, p. 137-146.
8. Hanmer, S., Mengel, F., Connelly, J., and van Gool, J., 1997, Significance of crustal scale shear zones and synkinematic mafic dikes in the Nagssugto- qidian orogen, SW Greenland: A reexamination: Journal of Structural Geology, v. 19, p. 59-75.
9. Hanson, G. N., and Gast, P. W., 1967, Kinetic studies in contact metamorphic zones: Geochimica et CosmochimicaActa,v. 31, p. 1119-1153.
10. Harrison, M., 1981, Diffusion of 40Ar in hornblende: Contributions to Mineralogy and Petrology, v. 78, p. 324-331.
11. Jack, S. M. B., 1978, The north Atlantic Proterozoic dike swarm [Ph.D. thesis]: Liverpool, University of Liverpool, 391 p.
12. Kalsbeek, F., and Nutman, A., 1996, Anatomy of the Early Proterozoic Nagssugtoqidian orogen, West Greenland, explored by reconnaissance SHRIMP U-Pb zircon dating: Geology, v. 24, p. 515-518.
13. Kalsbeek, F., Bridgwater, D., and Zeck, H. P., 1978, A 1950 60 Ma Rb-Sr whole rock isochron age from two Kangâmiut dikes and the timing of the Nagssugtoqidian (Hudsonian) orogeny in West Greenland: Canadian Journal of Earth Sciences, v. 15, p. 1122-1128.
14. Kalsbeek, F., Pidgeon, R. T., and Taylor, P. N., 1987, Nagssugtoqidian mobile belt of West Greenland: A cryptic 1850 Ma suture between two Archaean continents-Chemical and isotopic evidence: Earth and Planetary Science Letters, v. 85, p. 365-385.
15. Korstgârd, J. A., 1979, Metamorphism of the Kangâmiut dikes and the metamorphic and structural evolution of the southern Nagssugtoqidian boundary in the Itivdleq-Ikertoq region, West Greenland: Grönlands Geologiske Undersogelse Rapport 89, p. 63-75.
16. McGregor, V. R., 1973, The early Precambrian gneisses of the Godthâb district. West Greenland: Royal Society of London Philosophical Transactions, ser. A, v. 273, p. 343-358.
17. Mengel, F. C., Bridgwater, D., and Hageskov, B., 1997, High metamorphic pressures in the erogenic margin and foreland-An example from the Paleoproterozoic Nagssugtoqidian orogen in West Greenland: Terra Nova, v. 9, p. 355.
18. Mezger, K., 1990, Geochronology in granulites, in Vielzeuf, D., and Vidai, P., eds., Granulites and crustal evolution: Mathematical and Physical Sciences, ser. C., v. 311, p. 451-470.
19. Nutman, A. P., Kalsbeek, F., Marker, M., van Gool, J. A. M., and Bridgwater, D., 1999, U-Pb zircon ages of Kangâmiut dykes and detrital zircons in metasediments in the Palaeoproterozoic Nagssugtoqidian Orogen (West Greenland); clues to the precollisional history of the orogen, m Mengel, F. C., ed., Precambrian orogenic processes: Precambrian research, v. 93, p. 87-104.
20. Ramberg, H., 1949, On the petrogenesis of the gneiss complexes between Sukkertoppen and Christianshaab, West Greenland: Meddelelser fra Dansk Geologisk Forening, v. 11, p. 312-327.
21. Sutton.J., and Watson, J., 1951, Scourie dikes and Laxfordian metamorphism: Geological Magazine, v. 88, p. 299-302.
22. Windley, B., 1970, Primary quartz ferro-dolerite/garnet amphibolite dikes in the Sukkertoppen region of West Greenland, m Newall, G., and Rast, N., eds., The mechanisms of igneous intrusion: Geological Journal Special Issue 2, p. 79-92.