Citation

Goleby, B.R., Rattenbury, M.C., Swager, C.P., Drummond, B.J., Williams, P.R., Sheraton, J.W. & Heinrich, C.A., 1993. Archaean Crustal Structure from Seismic Reflection Profiling, Eastern Goldfields, Western Australia : Results from the Kalgoorlie Seismic Transect. Record  1993/015. Australian Geological Survey Organisation, Canberra.

Abstract

Crustal seismic reflection profiling has successfully imaged the depth extent and the internalstructure of the Archaean greenstone of the Kalgoorlie Terrane and adjacent belts. The basalcontact of the green stones is subhorizontal and gently undulating, reaching a maximum depthof 7 km. Strongly reflective, subhorizontal layering occurs below the basal contact interpretedto be gneissic basement. The basal contact is offset in several places by moderate- to shallow-dipping, strongly reflective zones which project to the surface at the position of previouslymapped shear zones. These shear zones show clear normal displacement of greenstonestratigraphy and the basal greenstone-gneiss; some sole out into the basal greenstone contactand others extend considerably deeper into the gneissic basement. Stratigraphy and major foldstructures are well delineated, and granite plutons have been constrained to tapering surf-board shapes, rather than the sheet-like forms, or diapirs. Stratigraphic units appear totruncate abruptly at the basal greenstone contact in many places suggesting significantdecollement has occurred at the contact during low-angle thrusting. In association with the seismic traverse, a gravity traverse (200m station spacing) and airbornemagnetic traverse were carried out. The geological interpretation of seismic units is usefullyconstrained by the gravity data, which also provide evidence of changes in crustal structurealong the line. Geochemical analysis was carried out on material collected from the bottom of each shot hole(883 samples). A suite of 30 trace elements were analysed, and these data demonstratesignificant differences in granite chemistry along the line. A number of anomalous values for avariety of elements have been identified.
Google map showing geographic bounding box with values North bound East bound West bound South bound
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Product Type/Sub Type

nonGeographicDataset - GA Publication - Record

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license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1993

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Record
structural geology
seismics
Earth Sciences

Resource Language

English

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utf8

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unclassified

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Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

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Organisation Name
Geoscience Australia
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Canberra
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ACT
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Australia
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Metadata File Identifier

a05f7892-74aa-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

1996-10-30

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

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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