Crustal structure of the northern Nova Scotia rifted continental margin (eastern Canada)

Journal of Geophysical Research: Solid Earth

Volumn 109, Issue 9, 2004, Pages

  Funck, Thomas ^a   Jackson, H Ruth ^b   Louden, Keith E ^c   Dehler, Sonya A ^b   Wu, Yue ^c  

^a DANISH LITHOSPHERE CENTRE   (Denmark)

^b GEOLOGICAL SURVEY OF CANADA   (Canada)

^c DALHOUSIE UNIVERSITY   (Canada)

Author keywords

Continental margins; Crustal structure; Mantle serpentinization

Indexed keywords

CONTINENTAL MARGIN; CRUSTAL STRUCTURE; RIFTING; SEISMIC SURVEY; SERPENTINIZATION;

CANADA; NORTH AMERICA; NOVA SCOTIA; WESTERN HEMISPHERE; WORLD;

EID: 10044296318     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: 10.1029/2004JB003008     Document Type: Article

References (62)

1. Barr, S. M., and R. P. Raeside (1989), Tectono-stratigraphic terranes in Cape Breton Island, Nova Scotia: Implications for the configuration of the northern Appalachian orogen, Geology, 17, 822-825.
2. Barrett, D. L., M. Berry, J. E. Blanchard, M. J. Keen, and R. E. McAllister (1964), Seismic studies on the eastern seaboard of Canada: The Atlantic coast of Nova Scotia, Can. J. Earth Sci., 1, 10-22.
3. Bown, J. W., and R. S. White (1995), Effect of finite extension rate on melt generation at rifted continental margins, J. Geophys. Res., 100 18,011-18,029.
4. Chian, D., C. Keen, I. Reid, and K. E. Louden (1995a), Evolution of nonvolcanic rifted margins: New results from the conjugate margins of the Labrador Sea, Geology, 23, 589-592.
5. Chian, D., K. E. Louden, and I. Reid (1995b), Crustal structure of the Labrador Sea conjugate margin and implications for the formation of nonvolcanic continental margins, J. Geophys. Res., 100, 24,239-24,253.
6. Dean, S. M., T. A. Minshull, R. B. Whitmarsh, and K. E. Louden (2000), Deep structure of the ocean-continent transition in the southern Iberia Abyssal Plain from seismic refraction profiles: The IAM-9 transect at 40°20′N, J. Geophys. Res., 105, 5859-5885.
7. Detrick, R. S., R. S. White, and G. M. Purdy (1993), Crustal structure of North Atlantic fracture zones, Rev. Geophys., 31, 439-458.
8. Dick, H. J., J. Lin, and H. Schouten (2003), An ultraslow-spreading class of ocean ridge, Nature, 426, 405-412, doi:10.1038/nature02128.
9. Ebinger, C. J., and B. E. Tucholke (1988), Marine geology of Sohm Basin, Canadian Atlantic margin, AAPG Bull., 72, 1450-1468.
10. Edwards, R. A., R. B. Whitmarsh, and R. A. Scrutton (1997), The crustal structure across the transform continental margin off Ghana, eastern equatorial Atlantic, J. Geophys. Res, 102, 747-772.
11. Funck, T., J. R. Hopper, H. C. Larsen, K. E. Louden, B. E. Tucholke, and W. S. Holbrook (2003), Crustal structure of the ocean-continent transition at Flemish Cap: Seismic refraction results, J. Geophys. Res., 108(B11), 2531, doi:10.1029/2003JB002434.
12. Gibling, M. R., R. C. Boehner, and B. R. Rust (1987), The Sydney Basin of Atlantic Canada: An upper Paleozoic strike-slip basin in a collisional setting, in Sedimentary Basins and Basin-Forming Mechanisms, edited by C. Beaumont and A. J. Tankard, Mem. Can. Soc. Pet. Geol., 12, 269-285.
13. Hall, J., F. Marillier, and S. Dehler (1998), Geophysical studies of the structure of the Appalachian orogen in the Atlantic borderlands of Canada, Can. J. Earth Sci., 35, 1205-1221.
14. Harry, D. L., and J. C. Bowling (1999), Inhibiting magmatism on nonvolcanic rifted margins, Geology, 27, 895-898.
15. Henstock, T. J., R. S. White, and J. H. McBride (1996), Along-axis variability in crustal accretion at the Mid-Atlantic Ridge: Results from the OCEAN study, J. Geophys. Res., 101, 13,673-13,688.
16. Holbrook, W. S., and P. B. Kelemen (1993), Large igneous province on the US Atlantic margin and implications for magmatism during continental breakup, Nature, 364, 433-436.
17. Holbrook, W. S., G. M. Purdy, R. E. Sheridan, L. Glover III, M. Talwani, and D. Hutchinson (1994a), Seismic structure of the U.S. Mid-Atlantic continental margin, J. Geophys. Res., 99, 17,871-17,891.
18. Holbrook, W. S., E. C. Reiter, G. M. Purdy, D. Sawyer, P. L. Stoffa, J. A. Austin, J. Oh, and J. Makris (1994b), Deep structure of the U.S. Atlantic continental margin, offshore North Carolina, from coincident ocean-bottom and multichannel seismic data, J. Geophys. Res., 99, 9155-9178.
19. Holbrook, W. S., et al. (2001), Mantle thermal structure and active upwelling during continental breakup in the North Atlantic, Earth Planet. Sci., Lett., 190, 251-266.
20. Hopper, J. R., T. Dahl-Jensen, W. S. Holbrook, H. C. Larsen, D. Lizarralde, J. Korenaga, G. M. Kent, and P. B. Kelemen (2003), Structure of the SE Greenland margin from seismic reflection and refraction data: Implications for nascent spreading center subsidence and asymmetric crustal accretion during North Atlantic opening, J. Geophys. Res., 108(B5), 2269, doi:10.1029/2002JB001996.
21. Hopper, J. R., T. Funck, B. E. Tucholke, H. C. Larsen, W. S. Holbrook, K. E. Louden, D. Shillington, and H. Lau (2004), Continental breakup and the onset of ultraslow seafloor spreading off Flemish Cap on the Newfoundland rifted margin, Geology, 32(1), 93-96, doi:10.1130/G19694.1.
22. Jokat, W., O. Ritzmann, M. C. Schmidt-Aursch, S. Drachev, S. Gauger, and J. Snow (2003), Geophysical evidence for reduced melt production on the Arctic ultraslow Gakkel mid-ocean ridge, Nature, 423, 962-965, doi:10.1038/nature01706.
23. Keen, C. E., and A. Cordsen (1981), Crustal structure, seismic stratigraphy, and rift processes of the continental margin off eastern Canada: Ocean bottom seismic refraction results off Nova Scotia, Can. J. Earth Sci., 18, 1523-1538.
24. Keen, C. E., and P. Potter (1995a), The transition from a volcanic to nonvolcanic rifted margin off eastern Canada, Tectonics, 14, 359-371.
25. Keen, C. E., and P. Potter (1995b), Formation and evolution of the Nova Scotian rifted margin: Evidence from deep seismic reflection data, Tectonics, 14, 918-932.
26. Keen, C. E., W. A. Kay, and W. R. Roest (1990a), Crustal anatomy of a transform continental margin, Tectonophysics, 173, 527-544.
27. Keen, C. E., B. D. Loncarevic, I. Reid, J. Woodside, R. T. Haworth, and H. Williams (1990b), Tectonic and geophysical overview, in The Geology of North America, vol. I-1, Geology of the Continental Margin of Eastern Canada, Geol. Can., no. 2, edited by M. J. Keen and G. J. Williams, pp. 31-85, Geol. Surv. of Can., Ottawa, Ont.
28. Keen, C. E., B. C. MacLean, and W. A. Kay (1991), A deep seismic reflection profile across the Nova Scotia continental margin, offshore eastern Canada, Can. J. Earth Sci., 28, 1112-1120.
29. Klingelhöfer, F., L. Géli, L. Matias, N. Steinsland, and J. Mohr (2000), Crustal structure of a super-slow spreading centre: A seismic refraction study of Mohns Ridge, 72°N, Geophys. J. Int., 141, 509-526.
30. Klitgord, K. D., and H. Schouten (1986), Plate kinematics of the central Atlantic, in The Geology of North America, vol. M, The Western North Atlantic Region, edited by P. R. Vogt and B. E. Tucholke, pp. 351-378, Geol. Soc. of Am., Boulder, Colo.
31. Korenaga, J., W. S. Holbrook, G. M. Kent, P. B. Kelemen, R. S. Detrick, H. C. Larsen, J. R. Hopper, and T. Dahl-Jensen (2000), Crustal structure of the southeast Greenland margin from joint refraction and reflection seismic tomography, J. Geophys. Res., 105, 21,591-21,614.
32. Louden, K. E., and D. Chian (1999), The deep structure of non-volcanic rifted continental margins, Philos. Trans. R. Soc. London, Ser. A, 357, 767-804.
33. Louden, K. E., D. O. Wallace, and R. C. Courtney (1987), Heat flow and depth versus age for the northwest Atlantic Ocean: Results from the Sohm abyssal plain and implications for the Bermuda Rise, Earth Planet. Sci. Lett., 83, 109-122.
34. Louden, K. E., J. C. Osler, S. P. Srivastava, and C. E. Keen (1996), Formation of oceanic crust at slow spreading rates: New constraints from an extinct spreading center in the Labrador Sea, Geology, 24, 771-774.
35. Ludwig, W. J., J. E. Nafe, and C. L. Drake (1970), Seismic refraction, in The Sea, vol. 4, New Concepts of Sea Floor Evolution, Part I edited by A. E. Maxwell, pp. 53-84, Wiley-Interscience, Hoboken, N. J.
36. Marillier, F., C. E. Keen, G. S. Stockmal, G. Quinlan, H. Williams, S. P. Colman-Sadd, and S. J. O'Brien (1989), Crustal structure and surface zonation of the Canadian Appalachians: Implications of deep seismic reflection data, Can. J. Earth Sci., 26, 305-321.
37. Miller, D. J., and N. I. Christensen (1997), Seismic velocities of lower crustal and upper mantle rocks from the slow-spreading Mid-Atlantic Ridge, south of the Kane Transform zone (MARK), Proc Ocean Drill. Program Sci. Results, 153, 437-454.
38. Minshull, T. A., M. R. Muller, C. J. Robinson, R. S. White, and M. J. Bickle (1998), Is the oceanic Moho a serpentinization front?, in Modern Ocean Floor Processes and the Geological Record, edited by R. A. Mills and K. Harrison, Spec. Publ. Geol. Soc., 148, 71-80.
39. Morris, E., R. S. Detrick, T. A. Minshull, J. C. Mutter, R. S. White, W. Su, and P. Buhl (1993), Seismic structure of oceanic crust in the Western North Atlantic, J. Geophys. Res., 98, 13,879-13,903.
40. Oakey, G. N., and S. A. Dehler (2004), Atlantic Canada magnetic map series: Scotian shelf and surrounds, Open File Rep. 1814, Geol. Surv. of Can., Calgary, Alberta.
41. Pickup, S. L. B., R. B. Whitmarsh, C. M. R. Fowler, and T. J. Reston (1996), Insight into the nature of the ocean-continent transition off west Iberia from a deep multichannel seismic reflection profile, Geology, 24, 1079-1082.
42. Reid, I. D. (1994), Crustal structure of a nonvolcanic rifted margin east of Newfoundland, J. Geophys. Res., 99, 15,161-15,180.
43. Sage, F., C. Basile, J. Mascle, B. Pontoise, and R. B. Whitmarsh (2000), Crustal structure of the continent-ocean transition off the Côte d'Ivoire-Ghana transform margin: Implications for thermal exchanges across the palaeotransform boundary, Geophys. J. Int., 143, 662-678.
44. Sahabi, M., D. Aslanian, and J. L. Olivet (2004), Un noveau point de départ pour l'histoire de l'Atlantique central (A new starting point for the history of die central Atlantic), C. R. Geosci., 336(12), 1041-1052, doi:10.1016/ j.crte.2004.03.017.
45. Salisbury, M. H., and H. R. Jackson (2003), Crustal structure of the Meguma terrane parallel to the coast of Nova Scotia: Constraints on its origin, paper 42-1A presented at 38th Annual Meeting, Northeastern Sect., Geol. Soc. Am., Halifax, Nova Scotia.
46. Salisbury, M. H., and C. E. Keen (1993), Listric faults imaged in oceanic crust, Geology, 21, 117-120.
47. Sandwell, D. T., and W. H. F. Smith (1997), Marine gravity anomaly from Geosat and ERS 1 satellite altimetry, J. Geophys. Res., 102, 10,039-10,054.
48. Sawyer, D. S., R. B. Whitmarsh, A. Klaus, and Shipboard Scientific Party (1994), Proceedings of the Ocean Drilling Program, Initial Reports vol. 149, 719 pp., Ocean Drill. Program, College Station, Tex.
49. Sheridan, R. E., D. L. Musser, L. Glover III, M. Talwani, J. I. Ewing, W. S. Holbrook, G. M. Purdy, R. Hawman, and S. Smithson (1993), Deep seismic reflection data of EDGE U.S. Mid-Atlantic continental-margin experiment: Implications for Appalachian sutures and Mesozoic rifting and magmatic underplating, Geology, 21, 563-567.
50. Shimeld, J. (2004), A comparison of salt tectonic subprovinces beneath the Scotian Slope and Laurentian Fan, in Salt-Sediment Interactions and Hydrocarbon Prospectivity: Concepts, Applications, and Case Studies for the 21st Century, 24th Annual Bob. F. Perkins Research Conference [CD-ROM], edited by P. Post, Gulf Coast Soc., Sect. of Econ. Paleontol. and Mineral., Houston, Tex., in press.
51. Srivastava, S. P., and C. E. Keen (1995), A deep seismic reflection profile across the extinct Mid-Labrador Sea spreading center, Tectonics, 14, 372-389.
52. Talwani, M., J. L. Worzel, and M. Landisman (1959), Rapid gravity computations for two-dimensional bodies with application to the Mendocino submarine fracture zone, J. Geophys. Res., 64, 49-59.
53. Todd, B. J., I. Reid, and C. E. Keen (1988), Crustal structure across the southwest Newfoundland transform margin, Can. J. Earth Sci., 25 744-759.
54. Wade, J. A., and B. C. MacLean (1990), The geology of the southeastern margin of Canada, in The Geology of North America, vol. I-1, Geology of the continental margin of Eastern Canada, Geol. Can., no. 2, edited by M. J. Keen and G. J. Williams, pp. 167-238, Geol. Surv. of Can., Ottawa, Ont.
55. Welsink, H. J., J. D. Dwyer, and R. J. Knight (1989), Tectono-stratigraphy of the passive margin off Nova Scotia, in Extensional Tectonics and Stratigraphy of the North Atlantic Margins, edited by A. J. Tankard and H., R. Balkwill, AAPG Mem., 46, 215-231.
56. White, R. S., R. S. Detrick, M. C. Sinha, and M. H. Cormier (1984), Anomalous seismic crustal structure of oceanic fracture zones, Geophys. J. R. Astron. Soc., 79, 779-798.
57. White, R. S., D. McKenzie, and K. O'Nions (1992), Oceanic crustal thickness from seismic measurements and rare earth element inversions, J. Geophys. Res., 97, 19,683-19,715.
58. Whitmarsh, R. B., M.-O. Beslier, P. J. Wallace, and Shipboard Scientific Party (2000), Proceedings of the Ocean Drilling Program, Initial Reports, vol. 173, 493 pp., Ocean Drill. Program, College Station, Tex.
59. Williams, H. (1979), Appalachian Orogen in Canada, Can. J. Earth Sci., 16, 792-807.
60. Williams, H. (1995), Temporal and spatial divisions, in Geology of the Appalachian-Caledonian Orogen in Canada and Greenland, Geol. Can. no. 6, edited by H. Williams, pp. 21-44, Geol. Surv. of Can., Ottawa, Ont.
61. Zelt, C. A., and D. A. Forsyth (1994), Modeling wide-angle seismic data for crustal structure: Southeastern Grenville Province, J. Geophys. Res., 99, 11,687-11,704.
62. Zelt, C. A., and R. B. Smith (1992), Seismic traveltime inversion for 2-D crustal velocity structure, Geophys. J. Int., 108, 16-34.