stratigraphic, volcanologic and sedimentological

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Stratigraphic, volcanologic and sedimentological architecture of the Swayze area, Abitibi greenstone belt

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Page 1: Stratigraphic, volcanologic and sedimentological

Stratigraphic, volcanologic and

sedimentological architecture of the

Swayze area, Abitibi greenstone belt

Page 2: Stratigraphic, volcanologic and sedimentological

Swayze Timmins

DPFZ

Swayze?

Page 3: Stratigraphic, volcanologic and sedimentological

DPZ

Kapuskasing

structural zone

Nat River

complex

Kenogammisi

batholith

Foleyet timber

Rd.

Mallard Rd.

RDZ

Swayze greenstone belt – Geology map

Major deformation zones

Deerfoot DZ

Slate Rock DZ

Page 4: Stratigraphic, volcanologic and sedimentological

Ayer and Trowell (2002)

Swayze greenstone belt – Nomenclature and general Stratigraphy

Page 5: Stratigraphic, volcanologic and sedimentological

1) Overall goals

2) People

3) Historical mining and known deposits

4) The sedimentary basins of Swayze –

unconformities, provenance and depositional

timing

5) Sedimentary interface zones – the importance

of banded iron formation for the Swayze

stratigraphy and syngenetic mineralization

6) Geochronology map of Swayze: The emerging

of different volcanic terrains

7) Future work

8) Bonus slide – preliminary seismic profile

through Swayze

Agenda

Page 6: Stratigraphic, volcanologic and sedimentological

Through transect mapping and transect scale research

the goals are to:

The Swayze transect – Overall Goals

Identify and map critical rock units throughout the belt

Improve the stratigraphy and architecture of key volcanic

and sedimentary successions and their internal

relationships (thereby improving further geophysical

interpretations - e.g., seismic and MT)

Solve the question whether the volcanic stratigraphy

represents a continuum or its comprised of an

amalgamation of unrelated volcanic terrains?

Assess the potential for base and

precious metal mineralization

Page 7: Stratigraphic, volcanologic and sedimentological

Tom Gemmell (OGS and PhD student w. Metal Earth)

Arthur Blake, Msc (2017-2019) - Jefferson VMS deposit

Sean Hofman, Bsc (2017-2018) - Jefferson VMS deposit

Colt Meyer, Bsc (2017-2018) - Erosional unconformity

Lawraine Mogashoa Msc (2018-2020) - Geological and

Geophysical modelling

Rasmus Haugaard (Metal Earth)

The Swayze transect – People

Msc and Bsc students

Page 8: Stratigraphic, volcanologic and sedimentological

DPZ

Kapuskasing

structural zone

Nat River

complex

Kenogammisi

batholith

Foleyet timber

Rd.

Joburke: 49.000 oz Au

Jerome: 57.000 oz Au

Côte Gold

deposit:

>8 Moz

Rundle

deposit

Kenty

deposit

Jefferson VMS

prospect

Swayze - known deposits and mine sites

Swayze: 106.000 oz Au

(Abitibi greenstone belt: 180 Moz Au)Major deformation zones

Namex

deposit

Page 9: Stratigraphic, volcanologic and sedimentological

DPZ

Kapuskasing

structural zone

Nat River

complex

Kenogammisi

batholith

Foleyet timber

Rd.

The Swayze transect – The sedimentary basins of Swayze

North Swayze basin

South Swayze basin

<2690 Ma

<2696 Ma

<2688 Ma

Page 10: Stratigraphic, volcanologic and sedimentological

The Swayze transect – South Swayze basin

N

Page 11: Stratigraphic, volcanologic and sedimentological

The Swayze transect – South Swayze basin

Page 12: Stratigraphic, volcanologic and sedimentological

Tonalite ~2730 Ma

Conglomerate

The Swayze transect – South Swayze basin - Unconformities

Granite

boulder

Page 13: Stratigraphic, volcanologic and sedimentological

The Swayze transect – South Swayze basin - Unconformities

Page 14: Stratigraphic, volcanologic and sedimentological

The Swayze transect – South Swayze basin - Unconformities

Page 15: Stratigraphic, volcanologic and sedimentological

DPZ

Kapuskasing

structural zone

Nat River

complex

Kenogammisi

batholith

Foleyet timber

Rd.

The Swayze transect – The sedimentary basins of Swayze

North Swayze basin

South Swayze basin

<2690 Ma

<2696 Ma

<2688 Ma

Page 16: Stratigraphic, volcanologic and sedimentological

The Swayze transect – North Swayze basin

Conglomerate

Conglomerate

Sandstone

Sandstone

Conglomerate

Page 17: Stratigraphic, volcanologic and sedimentological

South Swayze sandstone

North Swayze sandstone

The Swayze transect – The sedimentary basins – Detrital zircons

2690 Ma

2725 Ma

2820 Ma 2890 Ma

n=113< 5% discordant (113/159 total)

2700 Ma

Age (Ma)

South Swayze sandstone

South Swayze sandstone

Page 18: Stratigraphic, volcanologic and sedimentological

Hwy 101

<2696 Ma <2688 Ma

50 Kilometers

.Foleyet Timber Rd.

Hwy 101

<2696 Ma

50 Kilometers

.Foleyet Timber Rd.

Kukatush porphyry

The Swayze transect – Depositional timing of the North Swayze basin?

Sedimentary basin

Page 19: Stratigraphic, volcanologic and sedimentological

Kapuskasing

structural zone

Nat River

complex

Kenogammisi

batholith

The Swayze transect – The importance of BIF

Nat River BIF

Mallard BIF

Jasper Hill BIF

Jefferson BIF

Page 20: Stratigraphic, volcanologic and sedimentological

>20

0 m

dep

th

Fe2+ Fe3+

Fe rich layer Fe rich layer Fe rich layer

Si rich layer Si rich layer

Fe rich layer

Biologic Fe(II) oxidation

Abiotic silica precipitation

Fe(OH)3

Si(OH)4

Haugaard et al. 2013

Depositional rate = 1 cm/400-500 year = 20-25 m/Myr

The Swayze transect – The importance of BIF

Page 21: Stratigraphic, volcanologic and sedimentological

The Swayze transect – The importance of BIF

Page 22: Stratigraphic, volcanologic and sedimentological

Kapuskasing

structural zone

Nat River

complex

Kenogammisi

batholith

The Swayze transect – The importance of BIF

Nat River BIF

Mallard BIF

Jasper Hill BIF

Woman River

BIF

Page 23: Stratigraphic, volcanologic and sedimentological

2735±5 Ma

The Swayze transect – Msc project - The Woman River BIF

Blake et al., 2018

Page 24: Stratigraphic, volcanologic and sedimentological

Sphalerite, galena and chalcopyrite

Best intersection: 7.27% Zn over

8.50m

The Swayze transect – The Woman River BIF

Page 25: Stratigraphic, volcanologic and sedimentological

BIF

Argillite

Felsic volcanic

Footwall

Hanging-wall

Mafic volcanic Tisdale?

Deloro

N

Chlorite +

sericite

alteration

The Swayze transect – The Woman River BIF

Stockwork alteration

Page 26: Stratigraphic, volcanologic and sedimentological

1. Further strengthen the stratigraphy

(chronostratigraphy and chemostratigraphy of

the volcanic rocks)

2. Improving the geological architecture such as

important terrain boundaries can be

determined

3. Implement the high-resolution seismic data,

especially the R2 (<10 km depth)

4. Constraining the nature, provenance and, if

possible, the depositional timing of the North

Swayze basin

Future work

Acknowledgements: Peter MacDonald (OGS); Charlie Mortimer; Pat

Pope and Mary Stalker (GFG Resources); IAMGOLD