Citation

Geoscience Australia provides most of its products for free under a Creative Commons Attribution 3.0 Australia Licence. We only require that you reference the use of our data or information using the following citation:
Petkovic, P., 2014. Gravity and Granites: Technical notes on mapping relationship between known granites and gravity. Record  2014/012. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2014.012

Abstract

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.
Google map showing geographic bounding box with values North bound -8.0 East bound 155.0 West bound 112.0 South bound -45.0
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Product Type/Sub Type

nonGeographicDataset - GA Publication - Record

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2014

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Record
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-8.0
East bound
155.0
West bound
112.0
South bound
-45.0

Lineage

Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf
docx

Distributor

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

Metadata File Identifier

e68e1156-3c89-3cb1-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

2014-04-09

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
Related Links
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

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