western quebec and southern ontario - Department of Geology

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

origin times of the remaining 52 events were calculated using the HYPOCENTERprogram (26 stations on average).Distance weightingrange(km)Table 4.1: Results from distance weighting tests.Total RMS forall eventsNumber ofevents withsolutionsAveragenumber ofstations150-350 33.97 48 18200-350 35.40 48 17250-350 35.42 48 19300-500 42.56 50 25300-600 44.50 52 26350-550 44.30 51 26350-650 49.84 50 25400-550 45.76 50 26400-600 46.10 50 26The distribution of the RMS for all individual solutions is shown in Figure 4.1.The majority of the RMS is smaller than 0.60 s (60%) with an average value of 0.45 s forall events. The maximum RMS is 0.8 sec. The distribution of the azimuthal gaps is alsoshown on Figure 3.10. The minimum azimutal gap of the events is 56˚and the largestazimutal gap is 300˚ (only for two events). Around 60% of all events have azimuthal gapsof less than 180°. A smaller azimuthal gap would give better solution for the hypocentrelocation.45
Figure 4.1: Distribution of RMS of the hypocentre solutions (top) and azimuthal gapdistribution (down) for all 52 events in the study area.The results from the hypocentre location with the estimated errors are presented inTable 4.2. Figure 4.2 shows histograms of the focal depth distribution of the eventsseparately for southern Ontario and Western Quebec. As it can be seen, the main peaks ofthe two respective depth distributions differ. The maximum depth for southern Ontario isbetween 8 and 12 km, and for Western Quebec between 20 and 24 km. In average thefocal depth of the Western Quebec events appears greater than that of the SouthernOntario seismic zone, which is consistent with previous studies (e.g., Ma and Atkinson,2006). The median depth calculated by the HYPOCENTER program is 19.5 km for46
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FOCAL MECHANISMS AND VARIATIONS IN
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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: CHAPTER 4RESULTSIn this chapter the
Page 59 and 60: Table 4.2: Earthquake parameters (h
Page 61 and 62: The focal depth calculated here is
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
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ecorded within this cluster. As it
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Figure 5.22: Nodal plane strike for
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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
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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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