Lake Boga granite quarry, Lake Boga, Swan Hill Rural City, Victoria, Australia
|Latitude & Longitude (WGS84):||35° 33' 6'' South , 143° 34' 53'' East|
|Latitude & Longitude (decimal):||-35.55167,143.58139|
|Köppen climate type:||BSk : Cold semi-arid (steppe) climate|
"The original exposures of this granite were on Allotment 29, Section 4, Parish of Kunat Kunat, some 10km SSW of Lake Boga township in northwestern Victoria. The outcrops were only just exposed above the flat-lying Tertiary sands and nodular limestone. The first attempt at quarrying were between 1924 and 1927. Immediately after World War 2 quarrying recommenced and has been operating ever since.
Since the 1970's the quarry has been an important source of specimens for mineral collectors, especially for fine crystals of fluorapatite.
The Lake Boga granite is Devonian in age and belongs to the same suite as the nearest granites at Wycheproof and Pyramid Hill. The Lake Boga granite is extremely variable in texture in the uppermost 10 metres of its exposure, where the most common rock type is a pink to cream or grey equigranular leucocratic granite. Coarse patches and veins of pegmatite are widespread, with less common zones of banded aplite. Irregular masses of black schorl also occur. Miarolitic cavities up to 1 metre across and lined with fine crystals of smoky quartz, orthoclase,albite, muscovite and fluorapatite are associated with coarse pegmatite zones. Smaller cavities up to several centimetres across occur ia an equigranular phase of the granite, marked by coarse segregations of muscovite and biotite. Many of the phosphate minerals occur in the cavities in this rock type.
At deeper levels, the granite shows only occasional pegmatoidal zones and cavities." (Birch 1993)
Lake Boga Granite Quarry has 4 type locality minerals
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
69 valid minerals. 4 (TL) - type locality of valid minerals.
GeochronologyMineralization age: Paleozoic : 391 ± 7 Ma to 309 ± 6 Ma
Important note: This table is based only on rock and mineral ages recorded below 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|
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
358.9 - 382.7 Ma
|Lake Boga Granite|
Age: Late Devonian (358.9 - 382.7 Ma)
Stratigraphic Name: Lake Boga Granite
Description: Two-mica granite; medium to coarse grained; porphyritic
Comments: igneous felsic intrusive; synthesis of multiple published descriptions
Lithology: Igneous felsic intrusive
Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia).