western quebec and southern ontario - Department of Geology

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

eng.php). All of the studied events have magnitudes between m N 3.5 and 5.5. Thestrongest event was the m N 5.7 10 km SE from Val-des-Bois (23th of Jun 2010). Most ofthe events (about 30 of them) have magnitudes of m N ~4.Digital waveforms were extracted from all possible Canadian seismic stations atdistances up to 1000 km using the AutoDRM service of Geological Survey of Canada(GSC) (http://earthquakescanada.nrcan.gc.ca/stndon/AutoDRM/index-eng.php). Thisincludes the CNSN, POLARIS, and FedNor stations. Data from the US stations wereextracted using the BREQ_FAST service of the Incorporated Research Institution forSeismology database (IRIS) (http://www.iris.edu/manuals/breq_fast.htm#4). All extractedwaveforms started around 2 minutes before the origin time and were 600 sec long. Datawas extracted from both short-period and broad-band instruments. Arrival time data forall studied events were provided by Geological Survey of Canada.27
Figure 3.2: Number of stations used versus frequency of the events and their cumulativenumber.Figure 3.3 shows the map distribution of the studied events (N=50) from 1992 to2010. The events are not uniformly distributed, but instead appear to be concentrated inseveral discrete areas. Among the 50 events studied here only 12 events (m>3.5) occurredin southern Ontario, and 38 of them occurred in western Quebec. Most of the earthquakesin western Quebec are concentrated along the Ottawa River and Montreal-Maniwakiregion with a strong NNW-NW trend, transverse to the Appalachians and the St.Lawrence River valley. There is no obvious concentration of earthquake epicentres in thenorthwestern part of the western Quebec (Figure 3.3). A similar relative absence ofearthquakes is also present in the historical data (Chapter 2, Figure 2.3). In southernOntario the earthquakes are concentrated either south of Lake Erie or in western LakeOntario and there is only one event in Georgian Bay (Figure 3.3).28
Page 1 and 2: 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: Fig. 3.1: Locations of seismic stat
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 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
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a) b)c) d)Figure 5.9: Summary of th
Page 91 and 92:
5.4.3 Adirondack Clusters (WQ4 and
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WQ5 is located in the southern part
Page 95 and 96:
Figure 5.13: Geological features of
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consistent with regional fault map
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WQ8 is locatedin the north-western
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5.4.5 Timiskaming Cluster (WQ9)The
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The known faults in WQ9 cluster are
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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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