Beaver Bay Complex

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Beaver Bay Complex
Hypabyssal mafic, intermediate and felsic
intrusions that occur within the medial and upper
parts of the volcanic edifice of the North Shore
Volcanic Group (NSVG)
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Beaver Bay Complex Circa 1982
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1985
COGEOMAP
1986
PROJECT
Dan H Terry B Dusty E Jim
Colin R
1989
Jim, Bernie, Colin, Jane, Steve
1985-1992
1987 Crew1
Jim Robbie L Nancy N Eric J
1990 1991
Jim D Mike S Terry B Jim
Dean P
Terry B Jim Susan B
Eric J Kirby Jim
1987 Crew 2
Susan B Terry B Jim
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Beaver Bay Complex Circa 2001 sbi Silver Bay
intrusions brd Beaver River diabase vhod
Victor Head diabase slg/slt Sonju Lake
intrusion hct Houghtaling Creek troctolite dfgn
Dam Five gabbronorite wlfd Wilson Lake
ferrodiorite elod Elbow Lake olivine
diabase frg/frqm Finland granophyre llg Lax
Lake gabbro bld Blesner Lake diorite umrg
Upper Manitou River gabbro ccpd Cabin Creek
porphyritic diorite slid Shoepack Lake
inclusion-rich diorite
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SOUTHERN BEAVER BAY COMPLEX
Sonju Lake Intrusion
Lower Troctolite Upper Gabbro
Blesner Lake Diorite
FTMD
Finland Granite
Ferromonzonite Leucogranite
Victor Head Ophitic Diabase
Lax Lake Gabbro
Silver Bay Intrusions
Beaver River Diabase
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Structural Complexity in the Tettegouche Park area
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Geologic Control on Topography in the Tettegouche
area
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NORTHERN BEAVER BAY COMPLEX
Felsic Series (DC)
Wilson Lake Ferrogabbro
Elbow Lake Ophitic Diabase
Fourmile Lake Ferrogabbro
Anorthositic Series (DC)
Shoepack Lake Inclusion-rich Diorite
FTMD
Cabin Creek Porphyritic Diorite
Dam Five Gabbronorite
Houghtaling Cr troctolite
Beaver River Diabase
Upper Manitou River Gabbro
Silver Bay Intrusions
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EASTERN BEAVER BAY COMPLEX
Houghtaling Cr Troctolite
FTMD
Leveaux Porphryritic Diorite
Beaver River Diabase
Carlton Peak Anorthosite
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FTMD
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FTMD Finland Tectono-magmatic Discontinuity
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(No Transcript)
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Western Beaver Bay Complex
CLLS - Cloquet Lake Layered Series
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BBC Magma Compositions
MgO
Na2OK2O
NSVG Lava Types OT olivine tholeiite
(pot-primitive OT) TB transitional basalt A
andesite FA ferroandesite I icelandite R
-rhyolite
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Origin of Anorthositic Rocks of the Duluth and
Beaver Bay Complexes
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Far Northern Beaver Bay Complex?
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(No Transcript)
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Transition from DC to BBC Magmatism
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(No Transcript)