2.4_DE_PAOLI_Kal_Strat

Government of Western Australia
Department of Mines and Petroleum
Geological Survey of
Western Australia
Kalgoorlie Stratigraphy Project
Eastern Goldfields Superterrane
Stratigraphy
M. De Paoli, J. Sapkota & S. Wyche

Government of Western Australia Department of Mines and PetroleumGovernment of Western Australia Department of Mines and PetroleumGovernment of Western Australia Department of Mines and Petroleum
Project scope
• Assign stratigraphy where possible,
while resolving and extrapolating the
“accepted” Kalgoorlie stratigraphy.
• Integrate magmatic history of mafic
and felsic volcanics; granites, mafic
intrusions and successions.
• Collect new data (geochron &
geochem) and revise mapping
where necessary.

Why??
• Limited by 2D view.
– Aim is to harmonize our understanding of the geology in the Eastern
Goldfields by producing an “integrated bedrock geological platform”
(IGB) to accommodate 3D and 4D geology!
• Lack of consensus on a stratigraphic/ terrane model.
– Build the “essential framework” for a 3D and 4D geological interpretation
to better understand the tectonic setting.
• Invigorate Greenfields exploration.
– 3D and 4D framework for mineralisation modelling.

Yilgarn Craton
• Yilgarn Craton is subdivide into 4 Terranes,
after Cassidy et al. (2006), where:
– The Youanmi Terrane (3.4 - 2.62 Ga)
“the protocraton”.
– The Narryer Terrane (3.8 - 2.62 Ga)
and the subdivided EGST (<3.0 Ga)
were accreted onto the nucleus.
– The relationship with the 3.5 - 2.62 Ga
South West Terrane is unclear.
Recent mapping in the Northeastern
Eastern Goldfields by GSWA has further
subdivided the Eastern Goldfields.
Cassidy et al. (2006)

Eastern Goldfields Superterrane
IFS: Ida Fault System;
OFS: Ockerburry Fault System;
HFS: Hootanui Fault System;
YFS: Yamarna Fault System.
• Major fault systems divide the Eastern
Goldfields Superterrane into 4 different
terranes.
• These fault systems mark stratigraphic
discontinuities.
Cassidy et al., 2006; Champion, 2006

Remote past….
• Recognition of the Kalgoorlie/ Kambalda
Stratigraphy (Woodall, 1965; Travis et al.,
1971).
• Regional application of Kalgoorlie
stratigraphy (e.g. Gemuts and Theron,
1975).
• Recognition of early low-angle structures
(Archiblad et al., 1978; Platt et al., 1978).
• Stratigraphic associations (Hallberg, 1985).
Williams (1976)

■ Kalgoorlie
■ Menzies
■ Norseman
25 km
Kalgoorlie Terrane
• GSWA outcrop mapping late 80’s – 90’s.
• Swager & Griffin (1990). 1st regional publication.
• Original idea of a single Komatiite unit.
• Regional stratigraphy developed for the
Kalgoorlie Terrane by Swager & Griffin.
• CSIRO through later Komatiite studies (e.g. Hill
et al., 1995) built upon this.
• Recognition of a regional nature to the key
marker horizon/ komatiite event.

Developments
Key developments: 1980-90’s a working stratigraphic
model
GSWA Late 1990’s – 2000’s
• 1:100K outcrop mapping coverage completed.
• New data SHRIMP (age context).
• AMIRA, UWA, ANU, GA
• High resolution magnetics and gravity.
• Seismic & magnetotellurics traverses.
• Geochemistry.
• AMIRA, pmd*CRC, CSIRO, Uni’s, Halberg
• Isotope geochemistry, Sm-Nd, Lu-Hf isotopic data.
• Sequence stratigraphy (e.g. Krapez et al., 2000).
• Initiation of GIS seamless mapping projects.
• pmd*CRC; AMIRA; MERIWA and University
studies.
Swager and Griffin, 1990

Kalgoorlie Terrane:
• Mafic – ultramafic package
• Regional komatiite at 2.7 Ga
Spinifex-textured komatiite
Knowns
Pillowed Basalt Spinifex-textured basalt
Peridotite/ orthocumulate
Kalgoorlie
Kambalda
Upper basalt
Komatiite
Lower basalt
25 km
Sills

Felsic volcanics
and volcaniclastics
Rhyolite Breakaway locality
Graded bedding Kanowna Town Dam
‘Terrane’ boundary
Kalgoorlie
Kambalda
Kalgoorlie/Black Flag
Gindalbie/Kurnalpi
25 km
Upper basalt
Komatiite
Lower basalt
Late Basins (Kurrawang)

Felsic rocks & late basins…
• Squire et al. (2010) have redefined
the upper part of the sequence…
• Black Flag Group
– Feldspathic volcanic and volcaniclastic
rocks (c. 2690-2670 Ma).
• Merougil Group
– Quartz-rich volcanic and volcaniclastic
rocks (c. 2670-2658 Ma).
• Kurrawang Group
– Conglomerate and sandstone (c. 2658-
2655 Ma).
Squire et al. (2010)

Recent studies: Gerard Tripp
Black Flag Group!
Integrate and expand to
regional spatial scale:
• Great! correlate
stratigraphic framework
throughout the Kalgoorlie
Terrane!?
• Issue: much greater
detail than the scope of
the stratigraphic mapping
project allows 

Squire et al. (2010)
Issues… extent & geochem?
Correlate mafic -
ultramafic
sequences using
geochem?
Issues…
Surface/ drill hole differences –
trace element variation –
incomplete coverage –
alteration/ mineralisation bias.
Hayman et al. 2015
Terrane coverage of
formal stratigraphy
for mafic-ultramafic
sequences?
Incomplete…
Ora Banda – Davyhurst – Riverina –
Broad Arrow – Marshal Pool –
Widgiemooltha – Kurrajong districts
??

Sequence of mapping; progress at
terrane scale
Agnew: Pawley. M, Sapkota. J,
published
Marshall Pool: Sapkota. J,
published
Melita: Wyche. N, published
Menzies: Sapkota. J, for release
Ora Banda: De Paoli. M, published
Kalgoorlie: Hall. C, published
Current interpretation areas….

Geological interpretation
& formal stratigraphy
Integrated Bedrock Geology seamless mapping and
stratigraphic framework methodology;
Issue - Lack of “spatial” (structural) continuity of the
mafic-ultramafic-mafic succession throughout the
Kalgoorlie Terrane. To accommodate this we
package these disparate formations into subgroups
within the Kalgoorlie Group.
• Subgroups are a convenient way to accommodate
for the structurally dismembered and complex
geology.
We hope to further constrain the tectonically relatable
Kalgoorlie, Gindalbie, Kurnalpi and Black Flag Groups
under the “Eastern Goldfields Supergroup”.
Separated to the East from the Burtville Supergroup.
Current seamless mapping coverage.

Stratigraphy between Ida and
Ockerburry Faults
Discontinuous > 2800 Ma mafic/
ultramafic package.
2720–2690 Ma mafic/ ultramafic
package; assigned to the
Kalgoorlie Group.
2690–2660 Ma felsic
volcaniclastic to siliciclastic
sequences; includes the Black
Flag Group and the Merougil
and Scotty Creek Formations.
2665–2655 Ma late siliciclastic
sediments; includes the
Kurrawang Formation.
Conglomerate, basal scour
Spinifex textured Komatiite
Conglomerate
Kambalda Komatiite
Lunnon Basalt
contact

Subgroup nomenclature allows for the characterisation of local variation
and spatially isolated mafic-ultramafic successions.
Lower basalt – Kalgoorlie Group
Correlation between 2720-2690 Ma Hannans, Coolgardie, Vetters, Broad
Arrow, Marshall Pool and Two Sisters Subgroups (South-to-North).
Lake Douglas
Conglomerate
Lake Douglas
Conglomerate
Claudius Member
Clianthus Flat Rhyodacite
Speedway Andesite
Abattoir East Gabbro
Powder
Gabbro
Centenary Shale
Mosquito Well
Conglomerate
Tripod Hill Member
Silver Lake Member
Little Blow Member
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
BlackFlagGroup(2690–2655Ma)
AGNEW
Seven Mile
Sandstone
Kurrawang
Formation
(2657±7)
Seven Mile Sandstone
KurrawangFormation
(2657±7)
Scotty Creek Formation (2662 ± 5)
Merougil Formation (2664 ± 6) / Navajo
Sandstone (2657 ± 4)
KALGOORLIE–KAMBALDA COOLGARDIE ORA BANDA – MENZIES BROAD ARROW LEONORA–MELITA MARSHALL POOL
Group/
Subgroup
Formation
Group/
Subgroup
Undivided Black Flag
Group
Undivided Black
Flag Group
Golden Mile Dolerite
(2680 ± 9)
Group
Black Flag Group (2692–2655 Ma)
Black Flag Group (2692–2655
Ma)
GindalbieGroup(2702–2671Ma)
Little Peters Formation
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
HannansSubgroup(2720–2690Ma)
Paringa Basalt
CoolgardieSubgroup(2720–2690Ma)
Gleesons Basalt
VettersSubgroup(2720–2690Ma)
Williamstown
Dolerite (2695.8 ±
4.3)Kapai Slate (2692 ± 4) Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
Devon Consols Basalt
Three Mile
Dolerite
Siberia Komatiite
Kambalda Komatiite
Vivien Formation (2682 ± 11)
MountWhiteGroup(2692–2662Ma)
Maria Mine Formation
Halfway Well Basalt
Mount Pleasant
Igneous Complex
Mount Clifford Komatiite
Burrell Well Basalt
BroadArrowSubgroup(2720–2690Ma)
Highway
Formation
TwoSistersSubgroup(2720–2690Ma)
White Hope Basalt
(2692 ± 3)
Turret Dolerite (2690.7
± 1.2)
Hangover Formation
MarshallPoolSubgroup(2720–2690Ma)
Mount Fouracre Basalt
Agnew Komatiite
Never Can Tell Basalt (2711 ± 4)
Bounty Igneous
Complex (2698.14 ±
0.95)
Ora Banda
Igneous Complex
Teutonic Bore Formation
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
n.b. stratigraphic units not to scale
Panglo Formation (2657)
Pig Well Formation
(2664 ± 4)
Brilliant Formation
Cock Robin Formation
Mount Leonora Formation
(2817 ± 6) Songvang Formation
Butchers Well Basalt
Trevors Bore Formation
Satellite Igneous
Complex
Fourteen Mile Well
Formation
Greenmont Basalt
Hickies Bore Basalt
Burbanks
Formation Donegal Komatiite
Lindsays Basalt
Walters Williams Formation
Scotia Basalt
Missouri Basalt
Lunnon Basalt Wongi Basalt
Conglomerate
Speedway Andesite
Powder
Gabbro
Centenary Shale
Tripod Hill Member
Silver Lake Member
Little Blow Member
Kurr
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
Ma)Orinda
Igneous
Complex
Paringa Basalt CoolgardieSubgroup(2720–2690Ma) Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Kambalda Komatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
Mount Ellis
Igneous Complex
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Conglomerate
Powder
Gabbro
Centenary Shale
Little Blow Member
Kurr
4)
g
Undivided Black
Flag Group
(2680 ± 9)
g
Ma)
Little Peters
Kents Bore
Melita For
(2687 ± 3,
2681 ± 4, 2
Orinda
Igneous
Complex
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
4.3)
Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
alt
Three Mile
Dolerite
Siberia Komatiite
iite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
Teutonic Bo
(2692 ± 4, 2
Mount Ellis
Igneous Complex
c units not to scale
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Wongi Basalt
Conglomerate
bro
Powder
Gabbro
Centenary Shale
Little Blow Member
Kurr
Undivided Black
Flag Group
ite
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Gleesons Basalt VettersSubgroup(2720–2690Ma)
8 ±
Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
le
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Wongi Basalt
Conglomerate
Powder
Gabbro
nary Shale
Member
Kurr
ed Black
oup
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
ns Basalt
n Hill
on
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Mount Pleasant
Igneous Complex
Mount Clifford K
Highway
Formation
Hangover Forma
Mount Fouracre
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
Formation
Mount Leonora
(2817 ± 6)
Trevors Bore Fo
ont Basalt
ks
on
ys Basalt
Scotia Basalt
Missouri Basalt
Wongi Basalt
te
Claudius Member
Mosquito Well
Conglomerate
Kurr
2655 Ma)
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
alt
asalt
atiite
Vivien Formation (2
Maria Mine Formati
Halfway Well Basalt
Mount Pleasant
Igneous Complex
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Hangover Formation
Agnew Komatiite
Never Can Tell Basa
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
Fourteen Mile Well
Formation
Hickies Bore Basalt
Donegal Komatiite
ms Formation
Scotia Basalt
alt
t
Claudius Member
Mosquito Well
Conglomerate
Kurr
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
inda
neous
mplex
Halfway Well Basalt
unt Pleasant
eous Complex
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Doleri
± 1.2)
Hangover Formation
Agnew Komatiite
Bounty Igneo
Complex (269
0.95)
a Banda
eous Complex
(2692 ± 4, 2688 ± 4)
unt Ellis
eous Complex
Satellite Ig
Complex
Fourteen Mile Well
Formation
Hickies Bore Basalt
Donegal Komatiite
Scotia Basalt

Komatiite - Kalgoorlie Group
Lake Douglas
Conglomerate
Lake Douglas
Conglomerate
Claudius Member
Speedway Andesite
Powder
Gabbro
Centenary Shale
Mosquito Well
Conglomerate
Tripod Hill Member
Silver Lake Member
Little Blow Member
z
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
AGNEW
Seven Mile
Sandstone
Kurrawang
Formation
(2657±7)
KurrawangFormation
(2657±7)
Group/
Subgroup
Formation
Group/
Subgroup
Group/
Subgroup
FormationFormation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Paringa Basalt
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
4.3)
Kapai Slate (2692 ± 4) Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Kambalda Komatiite
Lindsays Basalt Missouri Basalt
Satellite Igneous
Complex
Fourteen Mile Well
Formation
Agnew Komatiite
Bounty Igneous
Complex (2698.14 ±
0.95)
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
MountWhiteGroup(2692–2662
Ma)
Halfway Well Basalt
Mount Pleasant
Igneous Complex
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Dolerite
(2690.7 ± 1.2)
n.b. stratigraphic units not to scale Greenmont Basalt
Hickies Bore Basalt
Burbanks
Pig Well Formation
(2664 ± 4)
Brilliant Formation Cock Robin Formation
Hangover Formation
Scotia Basalt
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Ma)
Conglomerate
Speedway Andesite
Powder
Gabbro
Centenary Shale
Tripod Hill Member
Silver Lake Member
Little Blow Member
Kurr
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
Ma)Orinda
Igneous
Complex
Paringa Basalt
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Kambalda Komatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
Mount Ellis
Igneous Complex
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Conglomerate
dacite
e
Powder
Gabbro
Centenary Shale
r
r
Little Blow Member
Kurr
57 ± 4)
ck Flag
Undivided Black
Flag Group
(2680 ± 9)
ck Flag
Ma)
Little
Kents
Melit
(2687
2681
Orinda
Igneous
ComplexCoolgardieSubgroup(2720–2690Ma)
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
4.3)2 ± 4) Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
s Basalt
Three Mile
Dolerite
Siberia Komatiite
omatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
Teuto
(2692
Mount Ellis
Igneous Complex
raphic units not to scale
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
lt Wongi Basalt
Conglomerate
bro
Powder
Gabbro
Centenary Shale
Little Blow Member
Kurr
Undivided Black
Flag Group
ite
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Gleesons Basalt VettersSubgroup(2720–2690Ma)
8 ±
Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
le
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Wongi Basalt
Conglomerate
Powder
Gabbro
Centenary Shale
Little Blow Member
Kurr
Undivided Black
Flag Group
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Gleesons Basalt
Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Mount Pleasant
Igneous Complex
Moun
Highway
Formation
Hango
Moun
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
Brilliant Formation
Moun
(2817
Trevo
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Wongi Basalt
onglomerate
Claudius
Mosquito
Conglom
Kurrup (2692–2655 Ma)
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
ig Dick Basalt
ictorious Basalt
beria Komatiite
Vivien Fo
Maria Mi
Halfway W
Mount Pleasant
Igneous Complex
Burrell W
Highway
Formation
White Ho
(2692 ± 3
Hangover Formation
Agnew Ko
Never Ca
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
(2817 ± 6) Songvang
Fourteen M
Formation
Hickies B
Donegal
Scotia Basalt
Missouri Basalt
Wongi Basalt
te
Claudius Member
Mosquito Well
Conglomerate
Kurr
2655 Ma)
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
alt
asalt
atiite
Vivien Formation (2
Maria Mine Formati
Halfway Well Basalt
Mount Pleasant
Igneous Complex
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Hangover Formation
Agnew Komatiite
Never Can Tell Basa
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
Fourteen Mile Well
Formation
Hickies Bore Basalt
Donegal Komatiite
ms Formation
Scotia Basalt
salt
t

Upper basalt – Kalgoorlie Group
Lake Douglas
Conglomerate
Lake Douglas
Conglomerate
Claudius Member
Speedway Andesite
Powder
Gabbro
Centenary Shale
Mosquito Well
Conglomerate
Tripod Hill Member
Silver Lake Member
Little Blow Member
Formation
Group/
Subgroup
FormationFormation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
AGNEW
Seven Mile
Sandstone
Kurrawang
Formation
(2657±7)
KurrawangFormation
(2657±7)
MountWhiteGroup(2692–2662
Ma)
Pig Well Formation
(2664 ± 4)
Group/
Subgroup
Halfway Well Basalt
Agnew Komatiite
Mount Pleasant
Igneous Complex
Big Dick Basalt Mount Clifford Komatiite
Mount Ellis
Igneous Complex
Paringa Basalt
Gleesons Basalt
VettersSubgroup(2720–2690Ma)Black Flag Group (2692–2655 Ma)
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Williamstown
Dolerite (2695.8 ±
4.3)
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
Formation
Siberia Komatiite
Hangover Formation
Scotia Basalt
Missouri Basalt
Wongi Basalt
Bounty Igneous
Complex (2698.14 ±
0.95)
Burrell Well Basalt
Victorious Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Dolerite
(2690.7 ± 1.2)
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Three Mile
Dolerite
Kambalda Komatiite
Lindsays Basalt
Lunnon Basalt
Satellite Igneous
Complex
Fourteen Mile Well
FormationGreenmont Basalt
Hickies Bore Basalt
Burbanks
Conglomerate
Speedway Andesite
Powder
Gabbro
Centenary Shale
Tripod Hill Member
Silver Lake Member
Little Blow Member
Kurr
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
Ma)Orinda
Igneous
Complex
Paringa Basalt
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Kambalda Komatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
Mount Ellis
Igneous Complex
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Conglomerate
odacite
e
Powder
Gabbro
Centenary Shale
r
r
Little Blow Member
Kurr
657 ± 4)
ck Flag
Undivided Black
Flag Group
(2680 ± 9)
ck Flag
Ma)
Little
Kent
Meli
(268
2681
Orinda
Igneous
Complex
t
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
Formation
Big Dick Basalt
Victorious Basalt
s Basalt
Three Mile
Dolerite
Siberia Komatiite
omatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
Teuto
(2692
Mount Ellis
Igneous Complex
raphic units not to scale
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
alt Wongi Basalt
Conglomerate
Gabbro
Powder
Gabbro
Centenary Shale
Little Blow Member
Kurr
Undivided Black
Flag Group
Dolerite
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Gleesons Basalt
VettersSubgroup(2720–2690Ma)wn
695.8 ±
Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
o scale
Brilliant Formation
Greenmont Basalt
Burbanks
Formation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Wongi Basalt
Conglomerate
Powder
Gabbro
Centenary Shale
ttle Blow Member
Kurr
Undivided Black
lag Group
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Gleesons Basalt
Hampton Hill
ormation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Mount Pleasant
Igneous Complex
Mount C
Highway
Formation
Hangove
Mount F
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
Brilliant Formation
Mount Le
(2817 ± 6
Trevors B
Greenmont Basalt
Burbanks
ormation
Lindsays Basalt
Scotia Basalt
Missouri Basalt
Wongi Basalt
Basalt
present
BUT
interleaved
nglomerate
Claudius M
Mosquito
Conglome
Kurr
p (2692–2655 Ma)
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
g Dick Basalt
ctorious Basalt
beria Komatiite
Vivien For
Maria Min
Halfway W
Mount Pleasant
Igneous Complex
Burrell We
Highway
Formation
White Hop
(2692 ± 3)
Hangover Formation
Agnew Ko
Never Can
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
(2817 ± 6) Songvang
Fourteen M
Formation
Hickies Bo
Donegal K
alters Williams Formation
Scotia Basalt
ssouri Basalt
ongi Basalt
Claudius Member
Mosquito Well
Conglomerate
Kurr
5 Ma)
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
lt
e
Vivien Formation (2682
Halfway Well Basalt
Mount Pleasant
Igneous Complex
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
T
±
Hangover Formation
Agnew Komatiite
Never Can Tell Basalt (2
B
C
0
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
Fourteen Mile Well
Formation
Hickies Bore Basalt
Donegal Komatiite
Formation
Scotia Basalt

Felsic volcanics - Kalgoorlie Terrane
Similar tectonic regime constrains the 2690-2665 Ma Black Flag Group
(South-to-North).
Lake Douglas
Conglomerate
Lake Douglas
Conglomerate
Claudius Member
Speedway Andesite
Powder
Gabbro
Centenary Shale
Mosquito Well
Conglomerate
Tripod Hill Member
Silver Lake Member
Little Blow Member
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
AGNEW
Seven Mile
Sandstone
Kurrawang
Formation
(2657±7)
KurrawangFormation
(2657±7)
Group/
Subgroup
Formation
Group/
Subgroup
Group/
Subgroup
FormationFormation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Paringa Basalt
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Kambalda Komatiite
Satellite Igneous
Complex
Fourteen Mile Well
Formation
Agnew Komatiite
Bounty Igneous
Complex (2698.14 ±
0.95)
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
Halfway Well Basalt
Mount Pleasant
Igneous Complex
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Dolerite (2690.7
± 1.2)
Hickies Bore Basalt
Burbanks
Pig Well Formation
(2664 ± 4)
Hangover Formation
Scotia Basalt
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Ma)
Lake Douglas
Conglomerate
Lake Douglas
Conglomerate
Speedway Andesite
Powder
Gabbro
Centenary Shale
Tripod Hill Member
Group/
ubgroup
Formation
Group/
Subgroup
FormationBlackFlagGroup(2690–2655Ma)
Seven Mile
Sandstone
Kurrawang
Formation
(2657±7)
KurrawangFormation
(2657±7)
Group/
Subgroup
Formation
Group/
Subgrou
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
Black Flag
Ma)Orinda
Igneous
Complex
nansSubgroup(2720–2690Ma)
Paringa Basalt
ardieSubgroup(2720–2690Ma)
Gleesons Basalt
tersSubgroup(2720–2690Ma)
Williamstown
Dolerite (2695.8 ±
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Kambalda Komatiite
Mount Pleasant
Igneous Complex
ArrowSubgroup(2720–2690Ma)
Ora Banda
Igneous Complex
Mount Ellis
Igneous Complex
Panglo
Lake Douglas
Conglomerate
odacite
e
Powder
Gabbro
Centenary Shale
r
Formation
Group/
Subgroup
Formation Formation
Kurrawang
Formation
(2657±7) Seven Mile Sandstone
KurrawangFormation
(2657±7)
mation (2664 ± 6) / Navajo
57 ± 4)
Group/
Subgroup
Formation
Group/
Subgroup
ck Flag
Undivided Black
Flag Group
(2680 ± 9)
ck Flag
Ma)Orinda
Igneous
Complex
t
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
Formation
Big Dick Basalt
Victorious Basalt
s Basalt
Three Mile
Dolerite
Siberia Komatiite
omatiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
Mount Ellis
Igneous Complex
Lake Douglas
Conglomerate
cite
Powder
Gabbro
Centenary Shale
ormation
Group/
Subgroup
Formation Formation
G
Su
Kurrawang
Formation
(2657±7)
KurrawangFormation
(2657±7)
tion (2664 ± 6) / Navajo
± 4)
Group/
Subgroup
Formation
Group/
Subgroup
Flag
Undivided Black
Flag Group
(2680 ± 9)
Flag
Ma)Orinda
Igneous
Complex
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
4.3)4) Hampton Hill
Formation
Big Dick Basalt
Victorious Basalt
Basalt
Three Mile
Dolerite
Siberia Komatiite
matiite
Mount Pleasant
Igneous Complex
Highway
Formation
Ora Banda
Igneous Complex
Mount Ellis
Igneous Complex
Claudius Member
Mosquito Well
Conglomerate
Group/
Subgroup
FormationFormation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Scotty Creek Formation (2662 ±
Group/
Subgroup
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Halfway Well Basalt
Burrell Well Basalt
Highway
Formation
istersSubgroup(2720–2690Ma)
White Hope Basalt
(2692 ± 3)
Turret Dole
± 1.2)
oolSubgroup(2720–2690Ma)
Agnew Komatiite
(2692 ± 4, 2688 ± 4)
Pig Well Formation
(2664 ± 4)

Late basins - Kalgoorlie Terrane
Late basin event from 2665-2655 Ma, distal to local sedimentary sequences (South-to-
North).
Lake Douglas
Conglomerate
Lake Douglas
Conglomerate
Claudius Member
Speedway Andesite
Powder
Gabbro
Centenary Shale
Mosquito Well
Conglomerate
Tripod Hill Member
Silver Lake Member
Little Blow Member
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
AGNEW
Seven Mile
Sandstone
Kurrawang
Formation
(2657±7)
Kurrawang
Formation(2657±
7)
Group/
Subgroup
Formation
Group/
Subgroup
Group/
Subgroup
FormationFormation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Paringa Basalt
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
Formation
Big Dick Basalt
Victorious Basalt
Three Mile
Dolerite
Siberia Komatiite
Kambalda Komatiite
Satellite Igneous
Complex
Fourteen Mile Well
Formation
Agnew Komatiite
Bounty Igneous
Complex (2698.14 ±
0.95)
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Mount Ellis
Igneous Complex
Halfway Well Basalt
Mount Pleasant
Igneous Complex
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Dolerite
(2690.7 ± 1.2)
Hickies Bore Basalt
Burbanks
Pig Well Formation
(2664 ± 4)
Hangover Formation
Scotia Basalt
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Ma)
Lake Douglas
Conglomerate
Lake Douglas
Conglomerate
Speedway Andesite
Powder
Gabbro
Centenary Shale
Formation
Group/
Subgroup
Formation Forma
Seven Mile
Sandstone
Kurrawang
Formation
(2657±7)
KurrawangFormation
(2657±7)
KALGOORLIE–KAMBALDA COOLGARDIE ORA BANDA – MENZIES BROAD ARRO
Group/
Subgroup
Formation
Group/
Subgroup
Group
Undivided Black
Flag Group
(2680 ± 9)
Group
Black Flag Group (2692
Ma)Orinda
Igneous
Complex
Ora Banda
Igneous Complex
Panglo Formation (2
Lake Douglas
Conglomerate
Powder
Gabbro
Centenary Shale
Formation Formation
Group/
Subgroup
Formation
Group
Subgro
KurrawangFormation
(2657±7)
OOLGARDIE ORA BANDA – MENZIES BROAD ARROW LEONORA–MELITA
Group/
Subgroup
Formation
Group/
Subgroup
ndivided Black
lag Group
Ma)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Ora Banda
Igneous Complex
(2692 ± 4, 2688 ± 4)
Pig Well Formation
(2664 ± 4)
Claudius Member
Mosquito Well
Conglomerate
Group/
Subgroup
FormationFormation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
AGNEW
BROAD ARROW LEONORA–MELITA MARSHALL POOL
Group/
ubgroup
ck Flag Group (2692–2655
a)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Halfway Well Basalt
Turret Dolerite (26
(2692 ± 4, 2688 ± 4)
Pig Well Formation
(2664 ± 4)
Lake Douglas
Conglomerate
Powder
Gabbro
ntenary Shale
Pig Well Formation
(2664 ± 4)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Ma)
Ora Banda Teutonic Bore Formation
Kurrawang
Formation(2657±
7)
OLGARDIE ORA BANDA – MENZIES BROAD ARROW LEONORA–MELITA M
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
indalbieGroup(2702–2671Ma)
Formation
divided Black
g Group
Lake Douglas
Conglomerate
owder
abbro
Pig Well Formation
(2664 ± 4)
Kents Bore Basalt
Melita Formation
(2687 ± 3, 2682 ± 4,
2681 ± 4, 2679 ± 4)
Orinda
Igneous
Complex
Ma)
Ora Banda Teutonic Bore Formation
Kurrawang
Formation(2657±
7)
ORA BANDA – MENZIES BROAD ARROW LEONORA–MELITA MARSHALL POO
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formati
indalbieGroup(2702–2671Ma)

Lake Douglas
Conglomerate
Claudius Member
Speedway Andesite
Powder
Gabbro
Centenary Shale
Mosquito Well
Conglomerate
Tripod Hill Member
Silver Lake Member
Little Blow Member
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Formation
Group/
Subgroup
Group
AGNEW
Seven Mile
Sandstone
Kurrawang
Formation
(2657±7)
KALGOORLIE–KAMBALDA COOLGARDIE BROAD ARROW MARSHALL POOL
(2680 ± 9)
Paringa Basalt
Ma)
Halfway Well Basalt
Agnew Komatiite
Group
Undivided Black
Flag Group
Formation
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Dolerite
(2690.7 ± 1.2)
MarshallPoolSubgroup(2720–2690Ma) Mount Fouracre Basalt
Scotia Basalt
Bounty Igneous
Complex (2698.14 ±
0.95)
Kambalda Komatiite
Lindsays Basalt
Lunnon Basalt
Gleesons Basalt
Williamstown
Dolerite (2695.8 ±
4.3)
Satellite Igneous
Complex
Fourteen Mile Well
Hickies Bore Basalt
Burbanks
Three Mile
Dolerite
Hangover Formation
Kalgoorlie Terrane - highlights
• Komatiites form a
marker horizon within
the Kalgoorlie Group.
• Black Flag ‘type’ felsic
volcanic/sedimentary
sequence not seen in
the Marshall Pool area.
Brilliant Fm., Trevors Bore
Fm. and Donegal Komatiite
have ultramafic components
in the lower succession.
• More continuous >2800
Ma mafic/ultramafic
volcanism across the
Eastern Goldfields?
• So far only Mount
Leonora Fm. dated at
2817 Ma & possibly
Cock Robin Fm. at
Menzies.
Satellite Igneous
Complex
Fourteen Mile Well
Formation
Hickies Bore Basalt
Donegal Komatiite
e Mile
ite
Hangover Formation
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Dolerite
(2690.7 ± 1.2)
Scotia Basalt
Bounty Igneous
Complex (2698.14 ±
0.95)
Agnew Komatiite
Little Blow Member
Satellite Igneous
Complex
Fourteen Mile Well
Hickies Bore Basalt
Burbanks
Three Mile
Dolerite
Hangover Formation
Lindsays Basalt
Gleesons Basalt
Hampton Hill
Formation
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Dolerite
(2690.7 ± 1.2)
Scotia Basalt
Bounty Igneous
Complex (2698.14 ±
0.95)
Brilliant Formation
Agnew Komatiite
mber
Satellite Igneous
Complex
Fourteen Mile Well
Formationt Basalt
Hickies Bore Basalt
Donegal Komatiite
Three Mile
Dolerite
Hangover Formation
Basalt
Basalt
Hill Mount Clifford Komatiite
Burrell Well Basalt
Highway
Formation
White Hope Basalt
(2692 ± 3)
Turret Dolerite
(2690.7 ± 1.2)
Scotia Basalt
Bounty Igneous
Complex (2698.14 ±
0.95)
rmation
Agnew Komatiite

Currently….
Value add  Geochemistry !
Compile geochemical end-member limits to
key lithologies/ stratigraphy for use in
regional-scale studies;
1) Discriminate between lithologies and
correlate stratigraphy.
2) Designate key ‘type sections’ of
geochemically constrained stratigraphic
successions  test the working
stratigraphy/ tectonic models.
3) Aid in assigning formal stratigraphy.
Interpreted GSWA 1:500K bedrock geology showing
drill core that have to date been sampled.
Granites  Future emphasis - Integrate granite
suites via geochem/ geochron data to construct a
holistic stratigraphic model.

Conclusions
• The Kalgoorlie Group (2720–2690 Ma) includes the main mafic/
ultramafic succession between the Ida and Ockerburry Faults.
• Older than 2800 Ma mafic/ ultramafic/ sedimentary succession locally
underlies the Kalgoorlie Group (c.f. Marshall Pool Subgroup, Leonora area and
potentially further south).
• Similar successions which underlie the Kalgoorlie Group ‘type stratigraphy’
around Coolgardie and Agnew areas are also potentially >2800 Ma.
• The Kalgoorlie Group is generally uncomfortably overlain by felsic
volcanic – volcaniclastic – sedimentary rocks of the Black Flag Group
or its lateral equivalents.
• The Black Flag ‘type rocks’ are uncomfortably overlain by late basin
sediments (e.g. the Kurrawang Formation).
• Felsic/ mafic associations of the Gindalbie Group to the East are
tectonically juxtaposed to the Kalgoorlie Group.
Dunite with Sulphide blebs

50 km
Kalgoorlie
Leonora
▲ 2.8 Ga?
▲ 2.8 Ga
Granite
Granitic gneiss
Greenstone
2.7 Ga ultramafic
Eastern ultramafic
Add in previous outcrop
map for the now seamless
map in slide 15 for Open
Day

2.4_DE_PAOLI_Kal_Strat

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