Abstract

Copper-gold mineralisation in the Moonta-Wallaroo district of the south-eastern Gawler Craton is associated with regionally extensive magmatism and Na-Fe-K metasomatism, typical of Fe-oxide Cu-Au mineral provinces worldwide. In the Moonta-Wallaroo district, early widespread albite+/-actinolite+/-magnetite alteration is closely associated with magmatic fluids from granites of the Hiltaba Suite (ca. 1600 Ma) infiltrating the metasedimentary Wallaroo Group host rocks. Zones of biotite-magnetite alteration, often in highly foliated structural zones, also formed at this time and are associated with minor Cu mineralisation. Dating of monazite and titanite associated with magnetite-bearing alteration shows a strong temporal link with Hiltaba magmatism. Copper mineralisation is most closely associated with later chlorite-quartz-hematite-kfeldspar veining and alteration which overprints, replaces and demagnetises the early magnetite-bearing alteration. Latest stage alteration occurs as kaolinite-quartz and quartz-carbonate-hematite epithermal style alteration and veining, most notably along the Alford Shear Zone on the southern margin of the Tickera Granite. This late argillic alteration is also seen as a late overprint in the Wheal Hughes mine at Moonta. Drill targeting has historically often been of magnetic anomalies, but alteration paragenesis suggests that magnetic lows due to de-magnetising copper-bearing fluids may be better drill targets.
Google map showing geographic bounding box with values North bound -32.573 East bound 136.57 West bound 138.339 South bound -35.459
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Product Type/Sub Type

dataset - PowerPoint

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2002

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

PowerPoint
geochemistry
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-32.573
East bound
136.57
West bound
138.339
South bound
-35.459

Lineage

Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-db51-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2008-11-21

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays