NSW Isostatic Gravity on Tilt angle filtered Total Magnetic Intensity Reduced to the Pole

Isostatic residual Bouguer gravity image overlain on tilt-filtered total magnetic intensity reduced to the pole (Tilt TMI RTP) image. The image is a partially-transparent pseudocolour layer of Isostatic residual Bouguer gravity, with a histogram-equalised colour-stretch, overlain on a greyscale intensity layer of the Tilt TMI RTP, with a histogram-equalised stretch. Bouguer gravity compensates for variations in latitude, 'free-air' elevation and Bouguer correction (assuming a crustal density of 2.67 T/m³). The isostatic correction removes the effect of variations in the thickness of the Earth’s crust due to changes in topography. The tilt-angle filter of total magnetic intensity produces a local positive maximum over a magnetic source and is zero near the edge of the source, and is useful for tracing geological structure below variable depths of cover.

Simple

Identification info

Date (Revision)
2017-07-26T00:00:01
Status
Completed

Custodian

Geological Survey of NSW - Email MinView Information
Topic category
  • Geoscientific information
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Keywords (Theme)
  • Geophysics
  • Gravity
  • Isostatic Bouger
  • Tilt filter

Distribution Information

Distribution format

OnLine resource
Download Isostatic Gravity on Tilt angle filtered Total Magnetic Intensity Reduced to the Pole 2024 TIF file

Resource lineage

Statement
The spherical cap Bouguer gravity (ANGD) was downloaded from GADDS in March 2020 and clipped to NSW. These data were gridded with a cell size of 500x500 metres before being corrected for isostasy following the method outlined in Spencer and Musgrave (2006). The units for the data are μms⁻².
Hierarchy level
Dataset

Reference System Information

Reference system identifier
EPSG:4326

Reference System Information

Reference system identifier
CRS:84

Metadata

Metadata identifier
urn:uuid/500229ef8ccc7e057a48e3b98cf49d2c5069d80a

Language
English
Character encoding
UTF8

Custodian

Geological Survey of NSW - Email MinView Information

Type of resource

Resource scope
Dataset
Metadata linkage
https://geonetwork.geoscience.nsw.gov.au/geonetwork/srv/api/records/500229ef8ccc7e057a48e3b98cf49d2c5069d80a

Date info (Revision)
2024-05-09T18:04:45
Date info (Creation)
2020-08-03T14:43:49

Metadata standard

Title
ISO 19115:2003/19139
Edition
1.0
 
 

Overviews

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Spatial extent

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S
E
W


Keywords

Geophysics Gravity Isostatic Bouger Tilt filter

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