| NAMBOUR BASIN |
| State(s) |
Queensland |
| Area (km2)
|
Offshore
|
2500 (but poorly known) |
|
Onshore
|
7000 |
| Maximum thickness (m) |
600 |
| Age Range |
Late Triassic to Early Jurassic. |
| Basin |
Overlies |
Permo-Triassic Gympie Block. |
|
Underlies |
Latest Paleogene volcanics and Neogene coastal sediments. |
|
Subdivisions |
- |
|
Other |
Grades into the Maryborough Basin to the north. |
| Indicators |
Knowledge |
Good outcrop, regional geophysical and some well data onshore; limited
geophysical and one well offshore.
|
|
Basin type |
Intracratonic sag. |
|
System(s) |
Murta |
|
Water Depth (m) |
0 - < 200 |
| Exploration |
Status |
Frontier |
|
Wells |
5 petroleum (4 onshore, 1 on an offshore island), plus numerous water
wells.
|
|
Seismic line-km |
Not determined, but very sparse. |
|
Discoveries |
Nil |
|
Shows |
Nil |
|
HC evidence |
Nil |
| Geology |
Source(s) |
The underlying Ipswich Basin is a possible source. |
|
Reservoirs |
'Landsborough Sandstone'. |
|
Seals |
None identified; Cainozoic volcanics possible seal. |
|
Trap types |
Gentle anticlines in theory could form traps. |
|
Palaeogeographic summary |
Predominantly fluvial, but fluvio-lacustrine at top with possible brief
marine incursion.
|
| Timing |
Oil generation |
No evidence of generation from the Nambour Basin; Jurassic for the Ipswich
Basin, but any oil is likely to have been cracked to gas in the Early
Cretaceous.
|
|
Gas generation |
No evidence of generation from the Nambour Basin; Jurassic to Neogene for the
Ipswich Basin.
|
|
Trap formation |
Late Cretaceous. |
|
Other key times |
Jurassic-Cretaceous intrusions; Late Cretaceous folding; latest Paleogene
volcanism.
|
| Other important information |
- The offshore basin lies under a whale migration path for several months
of the year.
- A detailed Southeast Queensland dataset that includes the onshore basin
is available from the Queensland Department of Natural Resources and
Mines.
- The onshore basin includes National Parks.
- The onshore basin includes large urban areas.
|
| Geoscience Australia products available |
- |
