The HSI bright reflector: Further evidence for extensive magmatism in the Precambrian of western Canada

Tectonophysics

Volumn 288, Issue 1-4, 1998, Pages 71-81

  Mandler, H A F ^a   Clowes, R M ^a  

^a UNIVERSITY OF BRITISH COLUMBIA   (Canada)

Author keywords

Churchill province; LITHOPROBE; Reflection; Seismic surveys; Sills

Indexed keywords

CRUSTAL STRUCTURE; MAGMATISM; PRECAMBRIAN; SEISMIC REFLECTION;

CANADA, ALBERTA;

EID: 0031844709     PISSN: 00401951     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-1951(97)00284-9     Document Type: Article

References (30)

1. Anderson, E.M., 1951. The Dynamics of Faulting and Dyke Formation. Oliver and Boyd, Edinburgh.
2. Anderson, N.L., Hills, L.V., Cederwall, D.A. (Eds.). 1989. Geophysical Atlas of Western Canadian Hydrocarbon Pools. Canadian Society of Exploration Geophysicists/Canadian Society of Petroleum Geologists.
3. BABEL Working Group, 1993. Integrated seismic studies of the Baltic shield using data in the Gulf of Bothnia region. Geophys. J. Int. 112, 305-324.
4. Barnes, A.E., Reston, T.J., 1992. A study of two mid-crustal bright spots from southeast Georgia (USA). Geophys. J. Int. 108, 683-691.
5. Brewer, J.A., Brown, L.D., Steiner, D., Oliver, J.E., Kaufman, S., Denison, R.E., 1981. Proterozoic basin in the southern Midcontinenl of the United States revealed by COCORP deep seismic reflection profiling. Geology 9, 569-575.
6. Brocher, T.M., 1981. Geometry and physical properties of the Socorro, New Mexico, magma bodies. J. Geophys. Res. 86, 9420-9432.
7. Brown, L.D., Chapin, C.E., Sanford, A.R., Kaufman, S., Oliver, J., 1980. Deep structure of the Rio Grande rift from seismic reflection profiling. J. Geophys. Res. 85, 4773-4800.
8. Brown, L., Wille, D., Zheng, L., DeVoogd, B., Mayer, J., Hearn, T., Sanford, W., Caruso, C., Zhu, T.F., Nelson, D., Potter, C., Hauser, E., Klemperer, S., Kaufman, S., Oliver, J., 1987. COCORP: New perspectives on the deep crust. Geophys. J. Int. 89, 47-54.
9. Burwash, R.S., Baadsgard, H., Peterman, Z.E., 1963. Precambrian K-Ar dates from the western Canada sedimentary basin. J. Geophys. Res. 67, 1617-1625.
10. Coward, M.P., 1983. Thrust tectonics, thin skinned or thick skinned, and the continuation of thrusts to deep in the crust. J. Struct. Geol. 5, 113-123.
11. Ernst, R.E., Head, J.W., Parfitt, E., Grosfils, E., Wilson, L., 1995. Giant radiating dyke swarms on Earth and Venus. Earth Sci. Rev. 39, 1-58.
12. Gretener, P.E., 1969. On the mechanics of the intrusion of sills. Can. J. Earth Sci. 6, 1415-1419.
13. Hammer, P.T.C., Clowes, R.M., 1996. Seismic reflection investigations of the Mount Cayley bright spot - a midcrustal reflector beneath the Coast Mountains, British Columbia. J. Geophys. Res. 101, 20119-20131.
14. Hoffman, P.F., 1989. Precambrian geology and tectonic history. In: Bally, A.W., Palmer, A.R. (Eds.). The Geology of North America - An Overview. Geological Society of America, Boulder, CO. pp. 447-512.
15. Hyndman, R.D., 1988. Dipping seismic reflectors, electrically conductive zones, and trapped water in the crust over a subducting plate. J. Geophys. Res. 93, 13391-13405.
16. Jarchow, C.M., Thompson, G.A., Catchings, R.D., Mooney, W.D., 1993. Seismic evidence for active magmatic underplating beneath the Basin and Range province, western United States. J. Geophys. Res. 98, 22095-22108.
17. Juhlin, C., 1990. Interpretation of the reflections in the Siljan Ring area based on results from the Gravberg-I borehole. Tectonophysics 173, 345-360.
18. Korsch, R.J., Wake-Dyster, K.D., Johnstone, D.W., 1992. Seismic imaging of Late Palaeozoic-Early Mesozoic extensional and contractional structures in the Bowen and Surat basins, eastern Australia. Tectonophysics 215, 273-294.
19. Law, A., Snyder, D.B., 1997. Reflections from a mylonitized zone in central Sweden. J. Geophys. Res. 102, 841 1-8425.
20. Lilak, R.K., Hauser, E.C., 1992. The Bagdad reflection sequence as tabular mafic intrusions: Evidence from seismic modeling of mapped exposures. Geol. Soc. Am. Bull. 104, 1315-1325.
21. Mandler, H.A.F., Clowes, R.M., 1997. Evidence for extensive tabular intrusions in the Precambrian shield of western Canada: A 160 km long sequence of bright reflections. Geology 25 (3), 271-274.
22. Nelson, K.D., 1991. A unified view of craton evolution motivated by recent deep seismic reflection and refraction results. Geophys. J. Int. 105, 25-35.
23. Parsons, T., Sleep, N.H., Thompson, G.A., 1992. Host rock rheology controls on the emplacement of tabular intrusions: Implications for underplating of extended crust. Tectonics 11, 1348-1356.
24. Pollard, D.D., Muller, O.H., Dockstader, D.R., 1975. The form and growth of fingered sheet intrusions. Geol. Soc. Am. Bull. 86, 351-363.
25. Pratt, T.L., Hauser, E.C., Hearn, T.M., Reston, T.J., 1991. Reflection polarity of midcrustal Surrency bright spot beneath southeastern Georgia: Testing the fluid hypothesis. J. Geophys. Res. 96, 10145-10158.
26. Pratt, T.L., Mondary, J.F., Brown, L.D., Christensen, N.I., Danbom, S.H., 1993. Crustal structure and deep reflector properties: Wide angle shear and compressional wave studies of the midcrustal Surrency bright spot beneath southeastern Georgia. J. Geophys. Res. 98, 17723-17735.
27. Rey, P.F., Fountain, D.M., Clement, W.P., 1994. P wave velocity across a noncoaxial ductile shear zone and its associated strain gradient: Consequences for upper crustal reflectivity. J. Geophys. Res. 99, 4533-4548.
28. Ross, G.M., Eaton, D.W., 1997. The Winagami reflector sequence: Seismic evidence for post-collisional magmatism in the Proterozoic of western Canada. Geology 25 (3), 199-203.
29. Villeneuve, M.E., Ross, G.M., Theriault, R.J., Miles, W., Parrish, R.R., Broome, J., 1993. Tectonic subdivision and U-Pb geochronology of the crystalline basement of the Alberta Basin, western Canada. Geol. Surv. Can., Bull. 447, pp. 86.
30. Wernicke, B., Burchfiel, B.C. 1982. Modes of extensional tectonics. J. Struct. Geol. 4, 105-115.