Oakvale. Final report at licence full surrender, for the period 4/4/2013 to 24/11/2014.
Published: 17 Oct 1914 Created: 12 Nov 2024 Revised: 12 Nov 2024

Under a farm-in agreement it made with Marathon Resources, the licensee of an area in the SA Murray Basin far northern sector located near the SA-NSW State border, 25 km south of Mutooroo Homestead, undertook exploratory drilling for possible...

Under a farm-in agreement it made with Marathon Resources, the licensee of an area in the SA Murray Basin far northern sector located near the SA-NSW State border, 25 km south of Mutooroo Homestead, undertook exploratory drilling for possible economic buried marine placer heavy mineral (HM) sand deposits during January 2014. The intent was to investigate reported sub-economic HM mineralisation recognised in three separate locations by previous explorer Basin Minerals in 2000, when it drilled holes OK189, OK190, OK67 and OK65. 18 vertical RC aircore open holes with a total penetration of 331 m were completed along three traverses using existing station tracks, for a linear coverage of ~10 km. The hole spacing was 200 m on traverses 1 and 2, and 800 m on traverse 3. Holes were sampled every metre for panning the drill cuttings, assessing any HM occurrence, and undertaking geological logging. Only low grades of HM mineralisation (1-2%) were encountered, that are mostly very fine grained and admixed with clay, except for occurrences noted on traverse 3 which lies closest to the Curnamona Province basement rock outcrops. Intercept thicknesses of up to 2 m of the targeted Loxton - Parilla Sands are weakly developed as regressive beach facies. The weak sorting of the heavy minerals and the abundance of silt and clay were thought to reflect a depositional environment where the rate of sediment influx far exceeded the effects of sediment winnowing, i.e. a fluvial rather than a littoral setting. 75 samples of selected HM mineralised drill cuttings were submitted for laboratory heavy mineral analysis. After heavy liquid separation of the HM grains, four composite samples were made that underwent size screening to determine the distribution of grain size fractions, and then XRD analysis of bulk mineral composition and XRF analysis to determine mineral chemistry. It was found that the HM composite samples only contained <1% valuable heavy minerals, mainly rutile and trace zircon. Abundant iron oxides and common ilmenite made up the remainder of the concentrates. Because none of the HM drill intercepts were of an economic tenor, the decision was made to fully surrender tenure.

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About this record

Record No mesac25575
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor
Sponsor
Tenement EL 5202
Tenement Holder Australian Desalinated Water Pty Ltd;Marathon Resources Limited
Operator Australian Desalinated Water Pty Ltd;Marathon Resources Limited
Geological Province Murray Basin
Mine Name
Stratigraphy
Commodity
Notes
Geographic Locality: North-western Murraylands;Oakvale Station;Mutooroo Station
Doc No: Env 12657
Drillhole: DB001 - DB018;(337564 - 337581)

Geographic Locality: North-western Murraylands;Oakvale Station;Mutooroo Station Doc No: Env 12657 Drillhole: DB001 - DB018;(337564 - 337581)

Language English
Metadata Standard ISO 19115-3

Citations

Use constraints License
License Creative Commons Attribution 4.0
Persistent identifier https://pid.sarig.sa.gov.au/document/mesac25575
Citation Clarke, D.B.;Mason, A. 1914. Oakvale. Final report at licence full surrender, for the period 4/4/2013 to 24/11/2014. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac25575

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[140.5,-33],[141,-33],[141,-32.5],[140.5,-32.5],[140.5,-33]]]}
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Lineage