western quebec and southern ontario - Department of Geology

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$Fayek & Kyser 2000 uraninite fractionations.pdf - Queen's University$

30 07/09/2002 0.70 47.047 1.9 -76.237 2.8 24.5 2.8 0.42 51 10031 08/04/2003 0.73 44.630 3.3 -74.362 2.5 19.0 4.9 0.44 50 17832 30/06/2003 0.36 41.648 7.5 -81.150 9.9 7.0 3.0 0.63 27 32233 20/08/2003 0.39 46.012 1.4 -74.951 1.8 19.0 2.6 0.40 43 10134 12/10/2003 0.60 47.059 2.3 -76.322 2.0 21.0 2.4 0.36 73 13935 04/08/2004 0.80 43.672 1.6 -78.241 1.6 6.4 2.1 0.54 73 12336 03/03/2005 0.50 45.038 2.7 -74.189 2.3 18.4 3.7 0.24 72 15837 25/05/2005 0.54 46.290 1.3 -75.620 1.6 23.8 1.7 0.34 84 7738 04/07/2005 0.50 46.264 1.2 -76.912 1.7 16.7 2.2 0.28 79 8239 23/07/2005 0.54 47.037 2.6 -75.799 2.3 19.5 2.7 0.28 70 11240 06/09/2005 0.46 46.282 1.6 -75.287 2.1 23.1 2.4 0.78 52 9441 20/10/2005 0.49 44.671 1.5 -80.470 2.1 16.4 2.3 0.40 37 6842 09/01/2006 0.49 45.031 1.2 -73.897 1.6 15.0 2.7 0.54 60 5643 25/02/2006 0.59 45.664 1.4 -75.246 1.7 18.7 1.8 0.59 50 7044 20/06/2006 0.38 41.799 2.4 -81.202 2.3 9.1 5.3 0.46 46 21345 12/03/2007 0.47 41.377 6.1 -81.394 5.1 7.0 2.5 0.58 29 24346 30/09/2007 0.41 46.924 2.5 -76.510 2.0 15.4 3.9 0.47 44 10547 01/10/2007 0.52 47.069 1.6 -76.862 2.4 19.8 3.6 0.63 62 10348 23/12/2007 0.60 46.163 2.3 -77.350 2.6 25.9 2.3 0.64 40 7449 09/01/2008 0.33 41.758 3.6 -81.395 2.7 6.0 4.0 0.44 30 21450 23/06/2010 0.63 45.882 2.0 -75.495 1.8 25.9 2.5 0.56 76 4949
The focal depth calculated here is compared with the depth calculated in previous studiesusing depth phases (sPg, sPmP, and sPn) (so called RDPM – regional depth phasemodelling). Table 4.3 shows the comparison of focal depth calculated in this study withthose calculated by Ma and Atkinson (2006) and Ma and Eaton (2007) for the sameevents. In overall the focal depth calculated in Ma and Atkinson (2006) is smaller or atthe lower end of the confidence intervals of the depth calculated here using theHYPOCENTER program. On the other hand the focal depth in Ma and Eaton (2007) isvery close to the depth calculated here and only in two out of six cases is lower.There are a few possible reasons for the discrepancies between the depth determined inthis study using the HYPOCENTER program and RDPM results. The accuracy ofabsolute hypocentre locations (e.g. HYPOCENTER) is controlled by various factors,including seismograph network geometry, the accuracy of the arrival times of the usedphases, the crustal-velocity structure, etc. (Pavlis, 1986; Gomberg et al., 1990). Incomparison, the accuracy of the RDPM is affected by the accurate identification of thedepth phases, the velocity model, and the focal mechanism that can affect the waveformshapes and amplitudes, and thus may cause error in reading the phase-arrival times (Maand Atkinson, 2006).The focal depths for the 9 events compared here with the results from Ma and Atkinson(2006) are estimated using similar velocity model by the two methods. To explain thedifference between the depths there is a possibility that either the depth estimated by theHYPOCENTER program is affected by a trade-off between the epicentre location and/orthe depth estimated by the RDPM is affected by error in the identification of the depth50
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FOCAL MECHANISMS AND VARIATIONS IN
Page 3:
Acknowledgements:I would like to ex
Page 9 and 10: Figure 5.12: Summary of the focal m
Page 11 and 12: AbbreviationsCNSN: Canadian Nationa
Page 13 and 14: Earthquakes in western Quebec and s
Page 15 and 16: 1.2 Organization of ThesisChapter 1
Page 17 and 18: eastern Canada each year, of which
Page 19 and 20: Metasedimentary Belt boundary tecto
Page 21 and 22: The Grenville Front tectonic zone (
Page 23 and 24: Figure 2.3: Seismicity in the study
Page 25 and 26: oadly similar continent-continent c
Page 27 and 28: Figure 2.4: Historical earthquakes
Page 29 and 30: earthquakes have occurred within th
Page 31 and 32: cluster, which is considered part o
Page 33 and 34: 2001. All events seemed to occur in
Page 35 and 36: CHAPTER 3DATA SET AND METHODS3.1 In
Page 37 and 38: Fig. 3.1: Locations of seismic stat
Page 39 and 40: Figure 3.2: Number of stations used
Page 41 and 42: the strongest recorded event in the
Page 43 and 44: Figure 3.5: Earthquake source param
Page 45 and 46: The amplitudes of the seismic waves
Page 47 and 48: Figure 3.7: Vertical component wave
Page 49 and 50: HYPOCENTER programThe HYPOCENTER pr
Page 51 and 52: wave - e.g. Pg or Pn, Sg or Sn), th
Page 53 and 54: model for P-wave velocity with mult
Page 55 and 56: CHAPTER 4RESULTSIn this chapter the
Page 57 and 58: Figure 4.1: Distribution of RMS of
Page 59: Table 4.2: Earthquake parameters (h
Page 63 and 64: focal mechanism beach-ball diagrams
Page 65 and 66: some spatial variability of the ori
Page 67 and 68: 22 20001006 50 ±3 134 ±10 90 ±0
Page 69 and 70: a)b)c)d)Western QuebecSouthern Onta
Page 71 and 72: esults from other similar studies,
Page 73 and 74: source region (e.g. Chen and Molnar
Page 75 and 76: estimate using a stress inversion t
Page 77 and 78: Figure 5.3: Stress pattern for all
Page 79 and 80: oundaries of the Central Metasedime
Page 81 and 82: In Western Quebec Seizmic Zone (WQS
Page 83 and 84: deeper than 20 km (20 km to 26 km).
Page 85 and 86: Figure 5.7: Geologic features of WQ
Page 87 and 88: 2009). The Mont-Laurier earthquake
Page 89 and 90: a) b)c) d)Figure 5.9: Summary of th
Page 91 and 92: 5.4.3 Adirondack Clusters (WQ4 and
Page 93 and 94: WQ5 is located in the southern part
Page 95 and 96: Figure 5.13: Geological features of
Page 97 and 98: consistent with regional fault map
Page 99 and 100: WQ8 is locatedin the north-western
Page 101 and 102: 5.4.5 Timiskaming Cluster (WQ9)The
Page 103 and 104: The known faults in WQ9 cluster are
Page 105 and 106: a) b)c) d)Figure 5.19: Summary of t
Page 107 and 108: ecorded within this cluster. As it
Page 109 and 110: Figure 5.22: Nodal plane strike for
Page 111 and 112:
estricted to western Lake Ontario o
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More detailed look at the relations
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Baird, W.A. F., and McKinnon, S. D.
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Easton, R. M. (1986). Geochronology
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Havskov, J., and Ottemöller, L. (2
Page 121 and 122:
Ma, S., and Adams, J. (2002). Estim
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Rimando, R. E., and Benn, K. (2005)
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Wahlstrom, R. (1987) Focal mechanis
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APPENDIX A: Examples of Input and O
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SUNO BZ SN 3 141 15.29SADO BZ SG 4
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EEO BZ SG 4 140 48.02 91 0.09 0 315
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PAL BZ PN 2 D 140 33.20 53 -0.21 1
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APPENDIX C: Faults Plane Solutions
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Appendix D: Focal Mechanisms From P
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19810707 -74.6 45.1 13.0 1.9 304.0
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19950603 -76.4 47.1 18.0 3.9 100.1
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20060225 -75.2 45.7 18.7 4.5 125.8
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