Product catalogue
Inferred Base of McBride Basalt
This is a raster representing the base surface of the McBride Basalt Province, inferred from sparse data available, dominated by private water bore records. This interpretation was conducted by a hydrogeologist from Geoscience Australia.
Caveats
• This is just one model, based on sparse data and considerable palaeotopographic interpretation
• This model relies on the input datasets being accurate. However it is noted that substantial uncertainty exists both in the location of private bores and the use of drillers’ logs for identifying stratigraphic contacts.
• The location of palaeothalwegs is imprecise, and often it is only indicative of the presence of a palaeovalley.
• The purpose of this model is for visualisation purposes, so should not be considered a definitive depth prediction dataset.
Simple
Identification info
- Date (Creation)
- 2020-06-01
- Date (Publication)
- 2020-09-22T04:15:56
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/133451
- Citation identifier
- Digital Object Identifier/https://dx.doi.org/10.26186/133451
- Cited responsible party
-
Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Lai, E.C.S.
Author Kilgour, P.L.
Author Ransley, T. R.
Author Wallace, L.
Author Cook, S.
- Status
- Pending
- Point of contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Kilgour, P.L.
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
-
Product data repository: Various Formats
- Protocol
-
FILE:DATA-DIRECTORY
- Name of the resource
-
Data Store directory containing the digital product files
- Description
-
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
-
-
EARTH SCIENCES
-
GEOLOGY
-
- Project
-
-
Exploring for the Future
-
EFTF
-
Upper Burdekin
-
- Stratum
-
-
McBride Basalt
-
- Discipline
-
-
geology
-
hydrogeology
-
- Theme
-
-
groundwater
-
- Feature type
-
-
modelled geologic surface
-
- Keywords
-
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Published_External
-
Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Associated resource
- Association Type
- Operated on by
- Title
-
Upper Burdekin Groundwater Raster Products WMTS
- Citation identifier
- 140100
- Citation identifier
- e92e6349-4a71-487d-a429-5cc3678ad598
Associated resource
- Association Type
- Operated on by
- Title
-
Upper Burdekin Groundwater Raster Products WMS
- Citation identifier
- 140099
- Citation identifier
- 4cf6c456-bd1d-4205-9395-9d08588e7290
Associated resource
- Association Type
- Operated on by
- Title
-
Upper Burdekin Groundwater Raster Products WCS
- Citation identifier
- 140101
- Citation identifier
- 0850f5e3-3bed-46d6-b3cb-a1e50de18e13
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
-
Download the data (tif) [41.1 MB]
Download the data (tif) [41.1 MB]
- Distribution format
-
-
tif
-
- OnLine resource
-
Upper Burdekin Groundwater Raster Products WMS
Upper Burdekin Groundwater Raster Products WMS
- Distribution format
-
-
OGC:WMS
-
- OnLine resource
-
Upper Burdekin Groundwater Raster Products WMTS
Upper Burdekin Groundwater Raster Products WMTS
- Distribution format
-
-
OGC:WMTS
-
- OnLine resource
-
Upper Burdekin Groundwater Raster Products WCS
Upper Burdekin Groundwater Raster Products WCS
- Distribution format
-
-
OGC:WCS
-
Resource lineage
- Statement
-
Approach
124 bores with strata logs were used to interpolate an initial raster surface using the ArcGIS Topo to Raster command. In addition, the edge of the province was converted to a series of points attributed with the surface elevation for an additional input to Topo to Raster.
The resultant surface raster was converted to vector contours using the Contour spatial analyst tool in ArcGIS
Iteratively altered the generated contours, and used these modified contours as an input to the next Topo to Raster run and subsequent contour generation.
After several iterations, bores that were not fully penetrating the basalt, and points along the edge of province were dropped from inputs, and later the contours were given priority over the full-depth bores
Later iterations use extra dummy points to constrain the shape of interpreted features
The interpretation used the idea of sequences of spurs/re-entrants to form ridgelines/valleys.
Contours were modified to ensure that areas of outcropping basalt had a positive thickness. Areas of outcropping basement rocks were used to adjust contours to ensure a small or negative thickness (i.e. with above ground elevation) of basalt remained. Areas mapped as having sedimentary units could be either covering basalt or outside the extent of basalt, so therefore not used to constrain thinking.
Several iterations were required to ensure that (almost entirely) the basalt had positive thickness.
This method is based on the assumption that the base of basalt surface reflects the palaeotopographic surface, and so a topographic method for creating the surface is appropriate. The shapes of contour lines therefore reflect those that could be found in a topographic map.
As the method is iterative, the final product is therefore prone to bias from previous iterations and ultimately the initial Topo to Raster result. It has inherited features from these previous iterations, such as the need for a spur/re-entrant in a subregion.
The resultant model is one possible interpretation of the base of basalt. (No uncertainty has been presented.) Other models are possible.
Future drilling with accurate spatial (X, Y) and depth + strata (Z) data would constrain possible models – this would either suggest modifications to the model presented here, or suggest different ideas for building another model.
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/d2f49c11-60bd-4000-a5fc-c63ca67e0998
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Kilgour, P.L.
Type of resource
- Resource scope
- Dataset
- Name
-
Inferred Base of Nulla Basalt
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with uuid
- Citation identifier
- eCatId/133451
- Date info (Creation)
- 2025-03-12T06:15:24.606Z
- Date info (Creation)
- 2020-01-16T04:12:42
- Date info (Revision)
- 2025-03-12T06:16:43.753Z
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/133443