fingerprinting of the ottawafingerprinting of the ottawa...
TRANSCRIPT
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Fingerprinting of the Ottawa-Bonnechère and Fingerprinting of the OttawaSaguenay grabens under the St. Lawrence
Lowlands and Québec Appalachians:Prime targets for hydrocarbon exploration
Fingerprinting of the Ottawa--Bonnechère and Bonnechère and Saguenay grabens under the St. Lawrence Saguenay grabens under the St. Lawrence
Lowlands and Québec Appalachians:Lowlands and Québec Appalachians:Prime targets for hydrocarbon explorationPrime targets for hydrocarbon exploration
Robert Thériault, Jean-Yves LalibertéRobert Thériault, Jean(Quebec Ministry of Natural Resources – Energy Division)
Daniel Brisebois(Quebec Ministry of Natural Resources – Mines Division)
and Michel Rheault(MIR Télédétection)
Robert Thériault, Jean--Yves LalibertéYves Laliberté(Quebec Ministry of Natural Resources (Quebec Ministry of Natural Resources –– Energy Division)Energy Division)
Daniel BriseboisDaniel Brisebois(Quebec Ministry of Natural Resources (Quebec Ministry of Natural Resources –– Mines Division)Mines Division)
and Michel Rheaultand Michel Rheault(MIR Télédétection)(MIR Télédétection)
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OutlineOutlineOutline
• Saguenay GrabenStructural interpretation (lineaments)Intrusive rocks of mantle origin (lamprophyres)Pb-Zn stream sediment geochemistryDistribution of earthquakes
•• Saguenay GrabenSaguenay GrabenStructural interpretation (lineaments)Structural interpretation (lineaments)Intrusive rocks of mantle origin (lamprophyres)Intrusive rocks of mantle origin (lamprophyres)PbPb--Zn stream sediment geochemistry
• Ordovician Platform of eastern North AmericaOil and gas fields (including HTD facies)MVT and other Pb-Zn(Ba) depositsCambrian grabens / aulacogens
•• Ordovician PlatformOrdovician Platform of eastern North Americaof eastern North AmericaOil and gas fields (including HTD facies)MVT and other Pb-Zn(Ba) depositsCambrian grabens / aulacogens
• Ordovician Platform of eastern North AmericaOil and gas fields (including HTD facies)MVT and other Pb-Zn(Ba) depositsCambrian grabens / aulacogens
•• Ordovician PlatformOrdovician Platform of eastern North Americaof eastern North AmericaOil and gas fields (including HTD facies)MVT and other Pb-Zn(Ba) depositsCambrian grabens / aulacogens
Zn stream sediment geochemistryDistribution of earthquakesof earthquakes
• Ottawa-Bonnechère GrabenStructural interpretation (lineaments, basement map)Intrusive rocks of mantle origin (Monteregian Hills)Pb-Zn-Ba groundwater geochemistryDistribution of earthquakes
•• OttawaOttawa--Bonnechère GrabenBonnechère GrabenStructural interpretation (lineaments, basement map)Structural interpretation (lineaments, basement map)Intrusive rocks of mantle origin (Monteregian Hills)Intrusive rocks of mantle origin (Monteregian Hills)PbPb--ZnZn--Ba groundwater geochemistryBa groundwater geochemistryDistribution of earthquakesDistribution of earthquakes
• Conclusions•• ConclusionsConclusions
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Ordovician Platform of eastern North AmericaOrdovician Platform of eastern North AmericaOrdovician Platform of eastern North America
SaguenayGraben
Ottawa-Bonnechère
Graben
Gloades Corner
Port-au-Port
Albion-Scipio
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Saguenay and Ottawa-Bonnechère grabensSaguenay and OttawaSaguenay and Ottawa--Bonnechère grabensBonnechère grabens
????Ottawa-
BonnechèreGraben
Ottawa-Bonnechère
Graben
SaguenayGraben
SaguenayGraben
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Saguenay and Ottawa-Bonnechère grabensSaguenay and OttawaSaguenay and Ottawa--Bonnechère grabensBonnechère grabens
Pointe-du-Lac
St-Flavien
Galt
St-Wenceslas No 1 well
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OutlineOutlineOutline• Ordovician Platform of eastern North America
Oil and gas fields (including HTD facies)MVT and other Pb-Zn(Ba) depositsCambrian grabens / aulacogens
•• Ordovician PlatformOrdovician Platform of eastern North Americaof eastern North AmericaOil and gas fields (including HTD facies)Oil and gas fields (including HTD facies)MVT and other PbMVT and other Pb--Zn(Ba) depositsZn(Ba) depositsCambrian grabens / aulacogensCambrian grabens / aulacogens
• Saguenay GrabenStructural interpretation (lineaments)Intrusive rocks of mantle origin (lamprophyres)Pb-Zn-Ba stream sediment geochemistryDistribution of earthquakes
•• Saguenay GrabenSaguenay GrabenStructural interpretation (lineaments)Structural interpretation (lineaments)Intrusive rocks of mantle origin (lamprophyres)Intrusive rocks of mantle origin (lamprophyres)PbPb--ZnZn--Ba stream sediment geochemistryBa stream sediment geochemistryDistribution of earthquakesof earthquakes
• Saguenay GrabenStructural interpretation (lineaments)Intrusive rocks of mantle origin (lamprophyres)Pb-Zn-Ba stream sediment geochemistryDistribution of earthquakes
•• Saguenay GrabenSaguenay GrabenStructural interpretation (lineaments)Structural interpretation (lineaments)Intrusive rocks of mantle origin (lamprophyres)Intrusive rocks of mantle origin (lamprophyres)PbPb--ZnZn--Ba stream sediment geochemistryBa stream sediment geochemistryDistribution of earthquakesof earthquakes
• Ottawa-Bonnechère GrabenStructural interpretation (lineaments, basement map)Intrusive rocks of mantle origin (Monteregian Hills)Pb-Zn-Ba groundwater geochemistryDistribution of earthquakes
•• OttawaOttawa--Bonnechère GrabenBonnechère GrabenStructural interpretation (lineaments, basement map)Structural interpretation (lineaments, basement map)Intrusive rocks of mantle origin (Monteregian Hills)Intrusive rocks of mantle origin (Monteregian Hills)PbPb--ZnZn--Ba groundwater geochemistryBa groundwater geochemistryDistribution of earthquakesDistribution of earthquakes
• Conclusions•• ConclusionsConclusions
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Saguenay Graben – DEM mapSaguenay Graben Saguenay Graben –– DEM mapDEM map
SteSte--AnneAnne--desdes--MontsMonts
MataneMatane
RimouskiRimouski
SaguenayGraben
ChicoutimiChicoutimi
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Structural interpretation – SRTM mapStructural interpretation Structural interpretation –– SRTM mapSRTM map
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Geology of the Lower St. Lawrence areaGeology of the Lower St. Lawrence areaGeology of the Lower St. Lawrence area
RivièreRivière--dudu--LoupLoup
RimouskiRimouskiChicoutimiChicoutimi
MataneMatane
0 20 40 60 80 100
Kilometers
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Geology of the Lower St. Lawrence areaGeology of the Lower St. Lawrence areaGeology of the Lower St. Lawrence area
RivièreRivière--dudu--LoupLoup
RimouskiRimouskiChicoutimiChicoutimi
MataneMatane
Cap Enragé Formation
KamouraskaFormation
0 20 40 60 80 100
Kilometers
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Geology of the Lower St. Lawrence areaGeology of the Lower St. Lawrence areaGeology of the Lower St. Lawrence area
RivièreRivière--dudu--LoupLoup
RimouskiRimouskiChicoutimiChicoutimi
MataneMatane
Caldwell Groupvolcanic rocks
St-Anselme volcanicrocks (Parke well)
0 20 40 60 80 100
Kilometers
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Geology of the Lower St. Lawrence areaGeology of the Lower St. Lawrence areaGeology of the Lower St. Lawrence area
RivièreRivière--dudu--LoupLoup
RimouskiRimouskiChicoutimiChicoutimi
MataneMatane
Lac Longlamprophyre
Lac des Aigleslamprophyre
0 20 40 60 80 100
Kilometers
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Lac Long lamprophyre dykeLac Long lamprophyre dykeLac Long lamprophyre dyke
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Stream sediment geochemistry (Pb+Zn)Stream sediment geochemistry (Pb+Zn)Stream sediment geochemistry (Pb+Zn)
CarletonCarleton
MataneMatane
SteSte--AnneAnne--desdes--MontsMonts
RimouskiRimouski
RivièreRivière--dudu--LoupLoup
St. Lawrence River
Saguenay River
MVTMVT--type type mineralizationmineralization
Other PbOther Pb--ZnZn((BaBa) ) mineralizationmineralization
HTD HTD facies facies in in outcropoutcrop
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Distribution of earthquakesDistribution of earthquakesDistribution of earthquakesEarthquakeEarthquakeamplitudeamplitude
>6.0>6.05.0 5.0 –– 6.06.04.0 4.0 –– 5.05.03.0 3.0 –– 4.04.02.5 2.5 –– 3.03.0
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OutlineOutlineOutline• Ordovician Platform of eastern North America
Oil and gas fields (including HTD facies)MVT and other Pb-Zn(Ba) depositsCambrian grabens / aulacogens
•• Ordovician PlatformOrdovician Platform of eastern North Americaof eastern North AmericaOil and gas fields (including HTD facies)Oil and gas fields (including HTD facies)MVT and other PbMVT and other Pb--Zn(Ba) depositsZn(Ba) depositsCambrian grabens / aulacogensCambrian grabens / aulacogens
• Saguenay GrabenStructural interpretation (lineaments)Intrusive rocks of mantle origin (lamprophyres)Pb-Zn-Ba stream sediment geochemistryDistribution of earthquakes
•• Saguenay GrabenSaguenay GrabenStructural interpretation (lineaments)Structural interpretation (lineaments)Intrusive rocks of mantle origin (lamprophyres)Intrusive rocks of mantle origin (lamprophyres)PbPb--ZnZn--Ba stream sediment geochemistryBa stream sediment geochemistryDistribution of earthquakesof earthquakes
• Ottawa-Bonnechère GrabenStructural interpretation (lineaments, basement map)Intrusive rocks of mantle origin (Monteregian Hills)Pb-Zn-Ba groundwater geochemistryDistribution of earthquakes
•• OttawaOttawa--Bonnechère GrabenBonnechère GrabenStructural interpretation (lineaments, basement map)Structural interpretation (lineaments, basement map)Intrusive rocks of mantle origin (Monteregian Hills)Intrusive rocks of mantle origin (Monteregian Hills)PbPb--ZnZn--Ba groundwater geochemistryBa groundwater geochemistryDistribution of earthquakesDistribution of earthquakes
• Ottawa-Bonnechère GrabenStructural interpretation (lineaments, basement map)Intrusive rocks of mantle origin (Monteregian Hills)Pb-Zn-Ba groundwater geochemistryDistribution of earthquakes
•• OttawaOttawa--Bonnechère GrabenBonnechère GrabenStructural interpretation (lineaments, basement map)Structural interpretation (lineaments, basement map)Intrusive rocks of mantle origin (Monteregian Hills)Intrusive rocks of mantle origin (Monteregian Hills)PbPb--ZnZn--Ba groundwater geochemistryBa groundwater geochemistryDistribution of earthquakesDistribution of earthquakes
• Conclusions•• ConclusionsConclusions
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Ottawa-Bonnechère Graben – DEM mapOttawaOttawa--Bonnechère Graben Bonnechère Graben –– DEM mapDEM map
TroisTrois--RivièresRivières
QuébecQuébec
MontréalMontréal
SherbrookeSherbrooke
Ottawa-Bonnechère
Graben
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Structural interpretation – SRTM mapStructural interpretation Structural interpretation –– SRTM mapSRTM map
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Geology of the St. Lawrence LowlandsGeology of the St. Lawrence LowlandsGeology of the St. Lawrence Lowlands
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Geology of the St. Lawrence LowlandsGeology of the St. Lawrence LowlandsGeology of the St. Lawrence Lowlands
Monteregian HillsIntrusive Suite
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Geology of the St. Lawrence LowlandsGeology of the St. Lawrence LowlandsGeology of the St. Lawrence Lowlands
Sainte-Hénédine Formation
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Geology of the St. Lawrence LowlandsGeology of the St. Lawrence LowlandsGeology of the St. Lawrence Lowlands
Lacolle, Havelock andBarrington breccias
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Lacolle brecciaLacolle brecciaLacolle breccia
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Barrington brecciaBarrington brecciaBarrington breccia
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Basement structure mapBasement structure mapBasement structure mapQuébecQuébec
MontréalMontréal
Isocontour lines Isocontour lines (TWT)(TWT)
Interpreted faultsInterpreted faults
Seismic linesSeismic lines
TroisTrois--RivièresRivières
SherbrookeSherbrooke
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Basement structure mapBasement structure mapBasement structure map
Time (sec)Time (sec)
0.200.20
3.203.20
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Basement structure mapBasement structure mapBasement structure map
Time (sec)Time (sec)
0.200.20
3.203.20
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Basement structure mapBasement structure mapBasement structure map
Time (sec)Time (sec)
0.200.20
3.203.20
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Basement structure mapBasement structure mapBasement structure map
Time (sec)Time (sec)
0.200.20
3.203.20
BVI et al.St. Wenceslas No 1
Pointe-du-Lacgas field
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Basement structure map – 3D viewBasement structure map Basement structure map –– 3D view3D view
Time (sec)Time (sec)
0,200,20
3,203,20
NN
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Basement structure map – 3D viewBasement structure map Basement structure map –– 3D view3D view
Time (sec)Time (sec)
0,200,20
3,203,20
NN
Time (sec)Time (sec)
0,200,20
3,203,20
NN
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Basement structure map – 3D viewBasement structure map Basement structure map –– 3D view3D view
Time (sec)Time (sec)
0,200,20
3,203,20
NN BVI et al.St. Wenceslas No 1
Pointe-du-Lacgas field
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Top of Trenton structure mapTop of Trenton structure mapTop of Trenton structure map
Time (sec)Time (sec)
0.100.10
1.851.85
QuébecQuébec
MontréalMontréal
TroisTrois--RivièresRivières
SherbrookeSherbrooke
BVI et al.St. Wenceslas No 1Pointe-du-Lac
gas field
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Top of Trenton structure map – 3D ViewTop of Trenton structure map Top of Trenton structure map –– 3D View3D View
Time (sec)Time (sec)
0,100,10
1,851,85
NN
Time (sec)Time (sec)
0,100,10
1,851,85
NN
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Top of Trenton structure map – 3D ViewTop of Trenton structure map Top of Trenton structure map –– 3D View3D View
Time (sec)Time (sec)
0,100,10
1,851,85
NN BVI et al.St. Wenceslas No 1
Pointe-du-Lacgas field
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Groundwater geochemistry (Pb+Zn)Groundwater geochemistry (Pb+Zn)Groundwater geochemistry (Pb+Zn)
TroisTrois--RivièresRivières
QuébecQuébec
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Groundwater geochemistry (Pb+Ba)Groundwater geochemistry (Pb+Ba)Groundwater geochemistry (Pb+Ba)
TroisTrois--RivièresRivières
QuébecQuébec
MontréalMontréal
SherbrookeSherbrooke
MVTMVT--type type mineralizationmineralization
SEDEXSEDEX--type type mineralizationmineralization
Other PbOther Pb--ZnZn((BaBa)) mineralizationmineralization
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Distribution of earthquakesDistribution of earthquakesDistribution of earthquakes
EarthquakeEarthquakeamplitudeamplitude
>6.0>6.05.0 5.0 –– 6.06.04.0 4.0 –– 5.05.03.0 3.0 –– 4.04.02.5 2.5 –– 3.03.0
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Oil and gas exploration licencesOil and gas exploration licencesOil and gas exploration licences
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ConclusionsConclusionsConclusions• Eastward extensions of the Saguenay and Ottawa-Bonnechère grabens underneath the St. Lawrence Lowlands Platform and Appalachian thrust sheets are supported by : 1) the presence of E-W to WNW lineaments interpreted from DEM and structure maps; 2) the presence of conglomerates and various magmatic rocks of mantle origin; 3) common Pb-Zn deposits and stream sediment and groundwater metal anomalies; and 4) the distribution of earthquakes.
• Eastward extensions of the Saguenay and Ottawa-Bonnechère grabens underneath the St. Lawrence Lowlands Platform and Appalachian thrust sheets are supported by : 1) the presence of E-W to WNW lineaments interpreted from DEM and structure maps; 2) the presence of conglomerates and various magmatic rocks of mantle origin; 3) common Pb-Zn deposits and stream sediment and groundwater metal anomalies; and 4) the distribution of earthquakes.
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ConclusionsConclusionsConclusions• Faults associated with these two grabens represent prime exploration targets for hydrocarbon exploration, as they extend into the basement and thus represent potential conduits for the migration of hydrothermal fluids. A number of oil and gas discoveries have been made recently along similar structures in the United States, especially whithin hydrothermal dolomite reservoirs associated with the Trenton – Black River interval. In Quebec however, this play remains to be tested.
• Faults associated with these two grabens represent prime exploration targets for hydrocarbon exploration, as they extend into the basement and thus represent potential conduits for the migration of hydrothermal fluids. A number of oil and gas discoveries have been made recently along similar structures in the United States, especially whithin hydrothermal dolomite reservoirs associated with the Trenton – Black River interval. In Quebec however, this play remains to be tested.