Gravity and Granites: Technical notes on mapping relationship between known granites and gravity

Gravity anomalies over granite bodies are often negative polarity and rounded polygons. These characteristics were used to trial a method to map possible locations of subsurface granite bodies.


Two approaches were used to outline the geometry of rounded gravity anomalies:


a) Contouring of the residual Bouguer gravity field after removal of a regional field computed by filtering of the gravity field.


b) Detection of edges defined by maximum horizontal gradient of the residual Bouguer gravity field.


The resulting polygons are coloured according to whether granite outcrop, or encounter in wells, falls within the gravity polygon, is near such outcrop, or not proximal to outcrop.


The processing was done using software developed by the author in the Perl programming language and stored in the Energy Division software repository. The processing was organised to run in batch mode on any system on which Perl is installed, MS-Windows, Unix, Linux or NCI systems.


The input and output data files are ERMapper ASCII vector format and exported to ArcGIS shape files. The visualisation tool was ER-Mapper.

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Date (Publication)
2014-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/77502

Citation identifier
Digital Object Identifier/http://dx.doi.org/10.11636/Record.2014.012

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Geoscience Australia

 Canberra
Author

Petkovic, P.

 1
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Record

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2014/012

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9781925124019

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ED
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Commonwealth of Australia (Geoscience Australia)
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Commonwealth of Australia (Geoscience Australia)

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Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

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  • Earth Sciences

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Creative Commons Attribution 4.0 International Licence

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4.0

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http://creativecommons.org/licenses/

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Australian Government Security ClassificationSystem

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2018-11-01T00:00:00
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English
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UTF8

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Commonwealth of Australia (Geoscience Australia)

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Download the Record (docx)

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Download the Record (pdf)

Download the Record (pdf)

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  • pdf

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Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

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

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/e68e1156-3c89-3cb1-e044-00144fdd4fa6

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Language
English
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UTF8
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Commonwealth of Australia (Geoscience Australia)

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Document
Name

GA Record

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Geoscience Australia - short identifier for metadata record with

uuid

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eCatId/77502

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/e68e1156-3c89-3cb1-e044-00144fdd4fa6

Date info (Revision)
2018-04-20T06:09:12
Date info (Creation)
2013-09-17T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

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