Data

Geophysical interpretation of the central Olympic Cu-Au province GIS Dataset

Geoscience Australia
Direen, N.G. ; Lyons, P.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/39975&rft.title=Geophysical interpretation of the central Olympic Cu-Au province GIS Dataset&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/39975&rft.description=An interpretation of the pre-Neoproterozoic and Archean rocks of the central Olympic Cu-Au province of the eastern Gawler Craton based on calibrated gravity and magnetic data. The Olympic Cu-Au Province, of the eastern Gawler Craton, lies beneath the sedimentary sequences of the Stuart Shelf. Rocks of the basement are Late Archean metamorphics, and the Proterozoic Donington Suite, Hutchison Group, Wallaroo Group, Hiltaba Suite granitoids and mafic intrusives, and the Gawler Range Volcanics. Except for parts of the Gawler Range Volcanics, none of the basement crops out and is covered by sequences exceeding 3 km thickness, in places. Interpretation of units and structures was via gravity and airborne magnetic data. Some geological calibration was done by checking exploration drill logs or by examining the core. When core was examined, petrophysical properties were measured and used to constrain the interpretation.Maintenance and Update Frequency: asNeededStatement: The interpretation was done from airborne magnetic data and drillhole logging. The magnetic data are from numerous government and company datasets and were compiled by GA and PIRSA. Drillhole data are from PIRSA logs and logging by the authors. Gow's interpretation (1996: Geological evolution of the Stuart Shelf and Proterozoic iron oxide-associated mineralization: Insights from regional geophysical data. Unpublished PhD thesis) was the starting point for this work. Geological cross-sections derived from our interpretation were tested using ModelVision. The model of depth-to-basement was calculated using the ANUDEM topographic modelling algorithm and was based primarily on drill hole data and the mapped limits of basement outcrop. No attempt has been made to smooth the depth-to-basement contours which have been computer-generated from the gridded model. The vector data was digitised and compiled using ArcInfo 8.0.2. Depth-to-basement data was gridded and contoured using the Topogrid module of ArcInfo 8.0.2 and the Spatial Analyst extension of Arcview 3.2. Geophysical and depth-to-basement images were exported as BIL files from ER Mapper 5.5.&rft.creator=Direen, N.G. &rft.creator=Lyons, P. &rft.date=2002&rft.coverage=westlimit=135.965; southlimit=-32.58; eastlimit=138.215; northlimit=-29.883&rft.coverage=westlimit=135.965; southlimit=-32.58; eastlimit=138.215; northlimit=-29.883&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Australian Government Security ClassificationSystem&rft_rights=https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=GIS Dataset&rft_subject=Regional&rft_subject=GIS&rft_subject=geophysics&rft_subject=geology&rft_subject=mineral deposits&rft_subject=dataset&rft_subject=AU-SA&rft_subject=EARTH SCIENCES&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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CC-BY

Creative Commons Attribution 4.0 International Licence
http://creativecommons.org/licenses/by/4.0

Creative Commons Attribution 4.0 International Licence

CC-BY

4.0

http://creativecommons.org/licenses/

WWW:LINK-1.0-http--link

Australian Government Security ClassificationSystem

https://www.protectivesecurity.gov.au/Pages/default.aspx

WWW:LINK-1.0-http--link

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Brief description

An interpretation of the pre-Neoproterozoic and Archean rocks of the central Olympic Cu-Au province of the eastern Gawler Craton based on calibrated gravity and magnetic data. The Olympic Cu-Au Province, of the eastern Gawler Craton, lies beneath the sedimentary sequences of the Stuart Shelf. Rocks of the basement are Late Archean metamorphics, and the Proterozoic Donington Suite, Hutchison Group, Wallaroo Group, Hiltaba Suite granitoids and mafic intrusives, and the Gawler Range Volcanics. Except for parts of the Gawler Range Volcanics, none of the basement crops out and is covered by sequences exceeding 3 km thickness, in places. Interpretation of units and structures was via gravity and airborne magnetic data. Some geological calibration was done by checking exploration drill logs or by examining the core. When core was examined, petrophysical properties were measured and used to constrain the interpretation.

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Maintenance and Update Frequency: asNeeded
Statement: The interpretation was done from airborne magnetic data and drillhole logging. The magnetic data are from numerous government and company datasets and were compiled by GA and PIRSA. Drillhole data are from PIRSA logs and logging by the authors. Gow's interpretation (1996: Geological evolution of the Stuart Shelf and Proterozoic iron oxide-associated mineralization: Insights from regional geophysical data. Unpublished PhD thesis) was the starting point for this work. Geological cross-sections derived from our interpretation were tested using ModelVision. The model of depth-to-basement was calculated using the ANUDEM topographic modelling algorithm and was based primarily on drill hole data and the mapped limits of basement outcrop. No attempt has been made to smooth the depth-to-basement contours which have been computer-generated from the gridded model. The vector data was digitised and compiled using ArcInfo 8.0.2. Depth-to-basement data was gridded and contoured using the Topogrid module of ArcInfo 8.0.2 and the Spatial Analyst extension of Arcview 3.2. Geophysical and depth-to-basement images were exported as BIL files from ER Mapper 5.5.

Issued: 2002

Modified: 08 04 2019

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138.215,-29.883 138.215,-32.58 135.965,-32.58 135.965,-29.883 138.215,-29.883

137.09,-31.2315

text: westlimit=135.965; southlimit=-32.58; eastlimit=138.215; northlimit=-29.883

Subjects
AU-SA | Earth Sciences | GIS | GIS Dataset | Published_External | Regional | dataset | geology | geophysics | geoscientificInformation | mineral deposits |

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