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| Title: | Final report year ending 14 July 1991 Gum Tree Hills |
| Title Holder / Company: | CRA Exploration |
| Report id: | CR1991-0506 |
| Tenure: | EL6949 |
| Year: | 1991 |
| Author: | Agnew, PD |
| Abstract: | The aeromagnetic survey outline 5 magnetic anomalies possibly indicative of kimberlitic diatremes. They were followed up by helicopter magnetics and loam sampling. 1 chromite was returned from the GH45-3 anomaly. It was of low interest. No other positive results were obtained. 3 anomalies (GH45-1, GH45-3 and GH34-1) were selected for follow up by ground magnetics. Modelling of GH45-1 suggested a broad (+300m), thick (+70m) body at approximately 70m depth. Percussion drilling of the anomaly intersected a dark grey magnetic clay without affinities to kimberlitic lithologies. Anomaly GH45-3 was determined to be sourced in surficial gravels. Modelling of anomaly GH34-1 indicated a source at 180-200m depth-this was too deep for drill testing. |
| Date Added: | 23-Oct-2013 |
| Appears in Collections: | Minerals Exploration Reports (MEX) |
Files in this Report:
| File | Size | Format | Add to Download |
|---|---|---|---|
| CR19910506.pdf | 2.65 MB | Add |
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