Springfield basin, Cradock, South Flinders Ranges, Flinders Ranges, South Australia, Australiai
Regional Level Types | |
---|---|
Springfield basin | Basin |
Cradock | - not defined - |
South Flinders Ranges | - not defined - |
Flinders Ranges | Mining Region |
South Australia | State |
Australia | Country |
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Latitude & Longitude (WGS84):
32° 7' 47'' South , 138° 23' 25'' East
Latitude & Longitude (decimal):
Area:
9 km2
Type:
KΓΆppen climate type:
Mindat Locality ID:
269868
Long-form identifier:
mindat:1:2:269868:0
GUID (UUID V4):
8c4fead8-00d8-4057-b1de-2da34b76a0fd
Conglomerates
128 diamonds and fragments were recovered in the mid-1980s from Permian basal conglomerate. In 1998, an additional 56 diamonds were recovered from renewed exploration trenching, the largest being 3.5 mm and weighing 0.34 ct. Fresh indicator minerals, particularly garnet with a kelyphytic rind, suggested that the kimberlite source was relatively close to the basin. Site is that of exposed conglomerate of the basal conglomerate, Conglomerate unit A located at the SE-extent of the basin , and from which diamonds were recovered from a ~1m thick cobble unit as exposed in costeans. Surface mapping of the basal conglomerate or Conglomerate Unit A suggested the unit represents material deposited in river channels. Flow direction as estimated from studies of clast orientation indicate flow for the very basal member was into the area from a south-westerly direction. Subsequent drilling of 6 diamond holes confirmed continuity and thickening of conglomeritic beds within this basal sequence including the persistence of basal conglomerates, including a possible correlative of the diamondiferous cobble unit with a thickness of 2.05m. A study of indicator minerals from the core indicated a freshness that suggests a primary source in close proximity, possibly within 2km of the basin edge. Suggested volume of basal unit from mapping and drilling was 1.82 million cubic metres (for thickness 1.66m), and for overlying conglomerate unit with thickness 6.3m = 6.95 million cubic metres.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
β Diamond Formula: C |
β Diopside Formula: CaMgSi2O6 |
β Diopside var. Chromium-bearing Diopside Formula: Ca(Mg,Cr)Si2O6 |
β Ilmenite Formula: Fe2+TiO3 |
β Ilmenite var. Picroilmenite Formula: (Fe2+,Mg)TiO3 |
β Magnesiochromite Formula: MgCr2O4 |
β Pyrope Formula: Mg3Al2(SiO4)3 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Diamond | 1.CB.10a | C |
Group 4 - Oxides and Hydroxides | |||
β | Magnesiochromite | 4.BB.05 | MgCr2O4 |
β | Ilmenite | 4.CB.05 | Fe2+TiO3 |
β | var. Picroilmenite | 4.CB.05 | (Fe2+,Mg)TiO3 |
Group 9 - Silicates | |||
β | Pyrope | 9.AD.25 | Mg3Al2(SiO4)3 |
β | Diopside var. Chromium-bearing Diopside | 9.DA.15 | Ca(Mg,Cr)Si2O6 |
β | 9.DA.15 | CaMgSi2O6 |
List of minerals for each chemical element
C | Carbon | |
---|---|---|
C | β Diamond | C |
O | Oxygen | |
O | β Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
O | β Diopside | CaMgSi2O6 |
O | β Ilmenite | Fe2+TiO3 |
O | β Magnesiochromite | MgCr2O4 |
O | β Pyrope | Mg3Al2(SiO4)3 |
O | β Ilmenite var. Picroilmenite | (Fe2+,Mg)TiO3 |
Mg | Magnesium | |
Mg | β Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
Mg | β Diopside | CaMgSi2O6 |
Mg | β Magnesiochromite | MgCr2O4 |
Mg | β Pyrope | Mg3Al2(SiO4)3 |
Mg | β Ilmenite var. Picroilmenite | (Fe2+,Mg)TiO3 |
Al | Aluminium | |
Al | β Pyrope | Mg3Al2(SiO4)3 |
Si | Silicon | |
Si | β Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
Si | β Diopside | CaMgSi2O6 |
Si | β Pyrope | Mg3Al2(SiO4)3 |
Ca | Calcium | |
Ca | β Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
Ca | β Diopside | CaMgSi2O6 |
Ti | Titanium | |
Ti | β Ilmenite | Fe2+TiO3 |
Ti | β Ilmenite var. Picroilmenite | (Fe2+,Mg)TiO3 |
Cr | Chromium | |
Cr | β Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
Cr | β Magnesiochromite | MgCr2O4 |
Fe | Iron | |
Fe | β Ilmenite | Fe2+TiO3 |
Fe | β Ilmenite var. Picroilmenite | (Fe2+,Mg)TiO3 |
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