Abstract

A long-wavelength magnetic anomaly map is derived from near-surface observations. The data can be continued upward for comparison with maps derived from satellite data. Compared with a map from 400-km altitude observations of the MAGSAT satellite, the highs and lows are in a similar geographic position, but the MAGSAT map is smoothed, possibly by uncorrected variations in satellite altitude. The long-wavelength magnetic anomalies have no significant correlation with heat flow or seismically measured crustal thickness, and have an amplitude higher than that expected for a non-magnetic sediment. In central and western Australia, magnetic highs are spatially associated with crustal block boundaries defined by elongate, high-amplitude, associated gravity highs and lows. Consequently, the long-wavelength magnetic anomalies are thought to be caused by rocks of high magnetisation in the upper or lower crust.
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

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1984-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

81192 Product http://www.ga.gov.au/metadata-gateway/metadata/record/81192/

Keywords

GA Publication
Journal
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Lineage

Unknown

Digital Transfer Options

onLine

Distributor

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

Source Description

Source data not available.

Metadata File Identifier

fae9173a-7085-71e4-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 SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
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