O'Callaghans
O'Callaghans is a gold and copper exploration project in the Shire of East Pilbara, Western Australia. Its 5 WAMEX reports were lodged by 4 companies between 1987 and 2026, most recently Greatland Pty Ltd in 2026.
Who has explored here
Companies that lodged reports over O'Callaghans, most active first.
Who controls this ground today
Today 10 live and pending tenements sit over the O'Callaghans ground, held under 3 names.
- Which tenements sit over this ground, and who holds each
- The area they cover and when they expire
- The main holders here, by number of titles
- Whether that ground is meeting its expenditure commitments
- Dormant tenements and active forfeitures
- Mortgages, caveats and the expiry profile
Exploration record on O'Callaghans
- Local government
- Shire of East Pilbara
- Commodities targeted
- Gold 5 · Base Metals 2 · Copper 1
- Work on record
- Diamond drilling 2 · Geological mapping 2 · RC drilling 2 · Aerial colour photography 1 · Co-funded drilling 1 · Core library 1 · Core photography 1 · Density 1
- Resource declared
- Never on this record
- Downloadable data
- 1 of 5 reports include a digital package
- Report types
- Annual 3 · Co-Funded Drilling 1 · Final Surrender 1
Exploration reports
| Report | Year | Operator | Title |
|---|---|---|---|
| A155725 | 2026 | Greatland Pty Ltd | O’CALLAGHANS DRILL PROGRAM – FINAL GEOLOGICAL REPORT DMIRS Ref: R31DAG0037#2025-26 |
| A53755 | 1998 | Newcrest Mining Ltd | Newcrest Mining Ltd, Relinquishment report to the Department of Mines, E45/1509, O'Callaghans Joint Venture |
| A47878 | 1996 | Mim Exploration Pty Ltd | O'Callaghans (JV) Project, Annual Report for the period 14th October 1994 to 13th October 1995, E45/1508-1510. |
| A35041 | 1991 | Newcrest Mining Ltd | Annual Technical Report for Period ending 31/12/91 O'Callaghans Group Project M45/203-204 |
| A20120 | 1987 | Newmont Holdings Pty Ltd | Annual report period ended 01/02/87 Mining Leases M45/203 M45/204 O'Callaghans |
Other projects in the Shire of East Pilbara
What does the exploration record say about O'Callaghans?
NextMaps reads the WAMEX reports over a chosen area into a referenced prospectivity assessment: the geology, the historical programs, the drill intercepts and geochemistry, and the untested gaps, with every claim cited back to its source report. New accounts include a free report. How the reports work.
Get the free report Open this ground on the mapTenure data sourced from the DMPE public registers and SLIP WA (© Government of Western Australia, CC BY 4.0). Compiled by NextMaps. Verify against primary sources before reliance.