Main Range Volcanic Field, Toowoomba Region, Queensland, Australiai
| Regional Level Types | |
|---|---|
| Main Range Volcanic Field | Volcanic Field |
| Toowoomba Region | Region |
| Queensland | State |
| Australia | Country |
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Latitude & Longitude (WGS84):
28° 5' 57'' South , 152° 25' 5'' East
Latitude & Longitude (decimal):
Locality type:
Age:
29.1 to 21.1 Ma
Geologic Time:
Dating method:
K-Ar whole rock
Reference for age:
Webb, A. W., Stevens, N. C., & McDougall, I. (1967). Isotopic age determinations on Tertiary volcanic rocks and intrusives of southeastern Queensland. In Proceedings of the Royal Society of Queensland (Vol. 79, No. 7, pp. 79-92).
KΓΆppen climate type:
Main Range and Bunya Mountains, Moreton Bay Region, Queensland, Australia form a continuous belt of lavas and intrusions extending NNE for 220km from the southern boundary of Queensland. The volcanic rocks have an area of c. 4900kmΒ² and an estimated volume of c. 1000kmΒ² (Stevens et al. 1989).
The southern part of Main Range is heavily dissected and has high peaks, whereas the northern part forms a plateau with mesas developed in some parts. Two volcanic formations are distinguished in southern Main Range: The Lower Governors Chair Volcanics and the upper Superbus Basalt, they have a combined thickness of c. 900m.
Northern Main Range has 2 formations: Meringandan Volcanics and Tooowoomba Basalt.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities4 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Rock list contains entries from the region specified including sub-localities
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Alphabetical List Tree DiagramDetailed Mineral List:
| β Analcime Formula: Na(AlSi2O6) · H2O Reference: Vic Cloete. |
| β 'Feldspar Group' Reference: Ewart, A., & Grenfell, A. T. (1985). Cainozoic volcanic centres in southeastern Queensland: with special reference to the Main Range, Bunya Mountains, and the volcanic centres of the northern Brisbane coastal region. Department of Geology, University of Queensland, Papers, 11 (Part 3), 1-57. |
| β Nepheline Formula: Na3K(Al4Si4O16) Reference: Woolley A.R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe, p.259 |
| β Saponite Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O Reference: Vic Cloete. |
| β Thomsonite-Ca Formula: NaCa2[Al5Si5O20] · 6H2O Reference: Vic Cloete. |
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| β | Analcime | 9.GB.05 | Na(AlSi2O6) Β· H2O |
| β | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
| β | Saponite | 9.EC.45 | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 Β· nH2O |
| β | Thomsonite-Ca | 9.GA.10 | NaCa2[Al5Si5O20] Β· 6H2O |
| Unclassified Minerals, Rocks, etc. | |||
| β | 'Feldspar Group' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| H | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| H | β Analcime | Na(AlSi2O6) · H2O |
| O | Oxygen | |
| O | β Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| O | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| O | β Analcime | Na(AlSi2O6) · H2O |
| O | β Nepheline | Na3K(Al4Si4O16) |
| Na | Sodium | |
| Na | β Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| Na | β Analcime | Na(AlSi2O6) · H2O |
| Na | β Nepheline | Na3K(Al4Si4O16) |
| Mg | Magnesium | |
| Mg | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Al | Aluminium | |
| Al | β Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| Al | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Al | β Analcime | Na(AlSi2O6) · H2O |
| Al | β Nepheline | Na3K(Al4Si4O16) |
| Si | Silicon | |
| Si | β Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| Si | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Si | β Analcime | Na(AlSi2O6) · H2O |
| Si | β Nepheline | Na3K(Al4Si4O16) |
| K | Potassium | |
| K | β Nepheline | Na3K(Al4Si4O16) |
| Ca | Calcium | |
| Ca | β Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| Ca | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Fe | Iron | |
| Fe | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
Geochronology
Mineralization age: Oligocene : 25.2 Β± 0.2 MaImportant note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.
| Geologic Time | Rocks, Minerals and Events | ||||||
|---|---|---|---|---|---|---|---|
| Phanerozoic | |||||||
| Cenozoic | |||||||
| Paleogene | |||||||
| Oligocene |
| ||||||
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Woolley, A.R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. Geological Society, 384 pages, at p. 259.
Stevens, N.C., Grenfell, A., Knutson, J., Ewart, A. (1989) Main range. In: R.W. Johnson (ed.), Intraplate Volcanism in Eastern Australia and New Zealand, Cambridge University Press, Cambridge (UK), 111β112.
Ewart, A., & Grenfell, A. T. (1985). Cainozoic volcanic centres in southeastern Queensland: with special reference to the Main Range, Bunya Mountains, and the volcanic centres of the northern Brisbane coastal region. Department of Geology, University of Queensland, Papers, 11 (Part 3), 1-57.
Ewart, A. (1982). Petrogenesis of the Tertiary anorogenic volcanic series of Southern Queensland, Australia, in the light of trace element geochemistry and O, Sr and Pb isotopes. Journal of Petrology, 23(3), 344-382.
Ewart, A., Baxter, K., & Ross, J. A. (1980). The petrology and petrogenesis of the Tertiary anorogenic mafic lavas of southern and central Queensland, Australiaβpossible implications for crustal thickening. Contributions to Mineralogy and Petrology, 75(2), 129-152.
Webb, A. W., Stevens, N. C., & McDougall, I. (1967). Isotopic age determinations on Tertiary volcanic rocks and intrusives of southeastern Queensland. In Proceedings of the Royal Society of Queensland (Vol. 79, No. 7, pp. 79-92).
Localities in this Region
- Queensland
- Toowoomba Region
- Main Range Volcanic Field
- Toowoomba Region
Other Regions, Features and Areas containing this locality
Australia
- Clarence-Moreton BasinBasin
- Great Dividing RangeMountain Range
- New England OrogenOrogen
- Yarrol ProvinceGeologic Province
Australian PlateTectonic Plate
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Main Range Volcanic Field, Toowoomba Region, Queensland, Australia