Geological Survey of Victoria's (GSV) drillhole database, also known as the borehole database, is a central store for geological information on holes drilled in Victoria. It's an important resource for mining; extraction and exploration of minerals and petroleum; and assessments of groundwater.
The database holds over 140,000 records in the following categories:
- heavy mineral sands
- extractive industry
Reports and data
History of data capture
Before 1980, GSV recorded borehole data on 1 inch:1 mile plans and hard-copy borehole records.
- data for water boreholes drilled by both the public and private sectors
- all boreholes drilled by Minerals and Petroleum Division
- petroleum wells and some private-sector mineral exploration boreholes.
In areas where drilling was of particularly high density, locations were recorded on these plans as a single point or as occurring within an outlined area.
The parish was traditionally used as the primary classifier for numbering boreholes. Some minor anomalies exist where a borehole and parish boundary may be on one side of a road or the other, or where parish boundaries have been moved.
In 1980, GSV moved the location data to 1:100,000 AMG plans. Several years later, the survey started a program of electronic data collection.
- Borehole locations were digitised from the 1:100,000 plans with an accuracy of 300m.
- In areas of high borehole density, where boreholes were plotted on a single point, often only the first and last ten were recorded in the database.
- Boreholes whose parish was known, but exact location was unknown, were also recorded.
- Gathering mineral exploration borehole data from open-file exploration reports began in 2001 and is ongoing.
- Historic data is being captured 20m and 250m which is typically as accurate as the source allows.
- Assay data has been consistently captured but other downhole data hasn't.
For further information about the borehole database please contact us.
Page last updated: 02 Jun 2021