Field relations, U-Pb geochronology, and Sm-Nd isotope geochemistry of the Point Lake greenstone belt and adjacent gneisses, central Slave craton, N.W.T., Canada

Canadian Journal of Earth Sciences

Volumn 36, Issue 7, 1999, Pages 1043-1059

  Northrup, C J ^a   Isachsen, C ^b   Bowring, S A ^c  

^a BOISE STATE UNIVERSITY   (United States)

^b University of Arizona   (United States)

^c MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ARCHEAN; CRUSTAL EVOLUTION; GREENSTONE BELT; SAMARIUM-NEODYMIUM DATING; URANIUM-LEAD DATING;

CANADA; NORTHWEST TERRITORIES; SLAVE CRATON;

EID: 0033501179     PISSN: 00084077     EISSN: None     Source Type: Journal    
DOI: 10.1139/e99-004     Document Type: Article

References (41)

1. Anhaeusser, C.R. 1981. Geotectonic evolution of the Archaean successions in the Barberton Mountain land, South Africa. In Precambrian plate tectonics. Edited by A. Kröner. Elsevier, Amsterdam, pp. 137-160.
2. Bickle, M.J., Nisbet, E.G., and Martin, A. 1994. Archean greenstone belts are not oceanic crust. Journal of Geology, 102: 121-138.
3. Blenkinsop, T.G., Fedo, C.M., Bickle, M.J., Eriksson, K.A., Martin, A., Nisbet, E.G., and Wilson, J.F. 1993. Ensialic origin for the Ngezi Group, Belingwe greenstone belt, Zimbabwe. Geology, 21: 1135-1138.
4. Bostock, H.H. 1980. Geology of the Itchen Lake area, District of Mackenzie. Geological Survey of Canada, Memoir 391, Map 1473A, scale 1 : 250 000.
5. Bowring, S.A., and Housh, T.B. 1995. The Earth's early evolution. Science (Washington, D.C.), 269: 1535-1540.
6. Corcoran, P.L., and Mueller, W.U. 1997. The 2.6 Ga Keskarrah Formation, Point Lake, Slave Province, NWT: alluvial to shallow-water coarse clastic sedimentation. Geological Association of Canada - Mineralogical Association of Canada, Program with Abstracts, 22: A30.
7. DePaolo, D.J. 1980. Crustal growth and mantle evolution: inferences from models of element transport and Nd and Sr isotopes. Geochimica et Cosmochimica Acta, 44: 1185-1196.
8. De Wit, M.J., Hart, R.A., and Hart, R.J. 1987. The Jamestown Ophiolite Complex, Barberton Mountain Belt: a section through 3.5 Ga oceanic crust. Journal of African Earth Science, 6: 681-630.
9. Easton, R.M. 1985. The nature and significance of pre-Yellowknife Supergroup rocks in the Point Lake area, Slave Structural Province, Canada. In Evolution of Archean supracrustal sequences. Edited by L.D. Ayers, P.C. Thurston, K.D. Card, and W. Weber. Geological Association of Canada, Special Paper 28, pp. 1563-1567.
10. Goodwin, A.M. 1981. Archean plates and greenstone belts. In Precambrian plate tectonics. Edited by A. Kröner. Elsevier, Amsterdam, pp. 105-135.
11. Goodwin, A.M., and Smith, J.E.M. 1980. Chemical discontinuities in Archaean volcanic terrain and the development of Archaean crust. Precambrian Research, 10: 301-311.
12. Helmstaedt, H., Padgham, W.A., and Brophy, J. 1986. Multiple dykes in the Kam Group, Yellowknife greenstone belt: evidence for Archean sea floor spreading? Geology, 14: 562-566.
13. Henderson, J.B. 1981. Archean basin evolution in the Slave Province, Canada. In Precambrian plate tectonics. Edited by A. Kröner. Elsevier, Amsterdam, pp. 213-235.
14. Henderson, J.B. 1985. Geology of the Yellowknife - Hearne Lake area, District of Mackenzie: a segment across an Archean basin. Geological Survey of Canada, Memoir 414.
15. Henderson, J.B. 1988. Geology, Keskarrah Bay area, District of Mackenzie, Northwest Territories. Geological Survey of Canada, Map 1697A, scale 1 : 50 000.
16. Henderson, J.B., and Easton, R.M. 1977. Archean supracrustal-basement relationships in the Keskarrah Bay map area, Slave Structural Province, District of Mackenzie. In Report of activities, part A. Geological Survey of Canada, Paper 77-1A, pp. 217-221.
17. Henderson, J.B., Loveridge, W.D., and Sullivan, R.W. 1982. A U-Pb study of zircon from granitic basement beneath the Yellowknife Supergroup, Point Lake, District of Mackenzie. In Rb-Sr and U-Pb isotopic age studies, Report 5. In Current research, part C. Geological Survey of Canada, Paper 82-1C, pp. 173-178.
18. Isachsen, C.E., and Bowring, S.A. 1994. Evolution of the Slave craton. Geology, 22: 917-920.
19. Isachsen, C.E., Bowring, S.A., and Padgham, W.A. 1991. U-Pb zircon geochronology of the Yellowknife volcanic belt, NWT, Canada: new constraints on the timing and duration of greenstone belt magmatism. Journal of Geology, 99: 55-67.
20. Jackson, V.A. 1982. Preliminary geological map of the Keskarrah Bay area, Slave Structural Province, District of Mackenzie (86 H/2W, 86 H/6E, 86 H/7W). Department of Indian Affairs and Northern Development, N.W.T., Geology Division, Yellowknife, EGS1982-4, scale 1 : 50 000.
21. Jackson, V.A. 1984. Structure and metamorphism of the Keskarrah Bay area, Point Lake, N.W.T: second preliminary report. In Contributions to the geology of the Northwest Territories. Vol. 1, pp. 47-54.
22. Krogh, T.E. 1973. A low contamination method for hydrothermal decomposition of zircon and extraction of U and Pb for isotopic age determination. Geochimica et Cosmochimica Acta, 37: 485-494.
23. Krogh, T.E. 1982. Improved accuracy of U-Pb zircon ages by the creation of more concordant systems using an air abrasion technique. Geochimica et Cosmochimica Acta, 46: 637-649.
24. Krogh, T.E., and Gibbins, W. 1978. U-Pb isotopic ages of basement and supracrustal rocks in the Point Lake area of the Slave Structural Province, Canada. Geological Association of Canada - Mineralogical Association of Canada, Program with Abstracts, 3: 438.
25. Kusky, T.M. 1989. Accretion of the Archean Slave Province. Geology, 17: 63-67.
26. Kusky, T.M. 1990. Evidence for Archean ocean opening and closing in the southern Slave Province. Tectonics, 9: 1533-1563.
27. Kusky, T.M. 1991. Structural development of the Archean orogen, western Point Lake, Canada. Tectonics, 10: 820-841.
28. Kusky, T.M., and Kidd, W.S.F. 1992. Remnants of an Archean oceanic plateau, Belingwe greenstone belt, Zimbabwe. Geology, 20: 43-46.
29. Kusky, T.M., and Vearncombe, J. 1997. Structure of Archean greenstone belts. In Tectonic evolution of greenstone belts. Edited by M.J. De Wit and L.D. Ashwal. Oxford Monographs in Geology and Geophysics, No. 35, pp. 91-124.
30. Ludwig, K.R. 1989. Pb.dat: a computer program for processing raw Pb-U-Th isotope data. United States Geological Survey, Open-file Report 88-557.
31. Ludwig, K.R. 1990. Isoplot: a plotting and regression program for radiometric-isotope data. United States Geological Survey, Open-file Report 90-91.
32. Mortensen, J.K., Thorpe, R.I., Padgham, W.A., King, I.E., and Davis, W.J. 1988. U-Pb zircon ages for felsic volcanism in the Slave Province, N.W.T. In Radiogenic age and isotope studies: Report 2. Geological Survey of Canada, Paper 88-2, pp. 85-95.
33. Nisbet, E.G. 1987. The Young Earth: an introduction to Archean geology. Allen and Unwin, Winchester, Mass.
34. Northrup, C.J. 1993. Re-evaluation of field relationships in the western Point Lake transect, central Slave Province, Northwest Territories. In Current research, part C. Geological Survey of Canada, Paper 93-1C, pp. 93-102.
35. Parrish, R.R., Roddick, J.C., Loveridge, W.A., and Sullivan, R.W. 1987. Uranium-lead analytical techniques at the geochronology laboratory, Geological Survey of Canada. In Radiogenic age and isotopic studies: Report 1. Geological Survey of Canada, Paper 87-2, pp. 3-7.
36. Schwerdtner, W.M., Stone, D., Osadetz, K., Morgan, J., and Stott, G.M. 1979. Granitoid complexes and the Archaean tectonic record in the southern part of northwestern Ontario. Canadian Journal of Earth Sciences, 16: 1965-1977.
37. Stacey, J.S., and Kramers, J.D. 1975. Approximation of terrestrial lead isotope evolution by a two-stage model. Earth and Planetary Science Letters, 26: 207-221.
38. Steiger, R.H., and Jäger, E. 1977. Subcommission on geochemistry: convention on the use of decay constants in geo-and cosmochronology. Earth and Planetary Science Letters, 36: 359-362.
39. van Breeman, O., Henderson, J.R., Jefferson, C.W., Johnstone, R.M., and Stern, R.A. 1994. U-Pb age and Sm-Nd isotopic studies in Archean Hood River and Torp Lake supracrustal belts, northern Slave Province, Northwest Territories. In Radiogenic age and isotope studies: Report 8. Geological Survey of Canada, Current Research, 1994-F, pp. 1-16.
40. Wendt, I., and Carl, C. 1991. The statistical distribution of the mean squared weighted deviation. Chemical Geology, 86: 275-285.
41. York, D. 1969. Least-squares fitting of a straight line with correlated errors. Earth and Planetary Science Letters, 5: 320-324.