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Title: | Evaluation for suitability for geochronology, Ngalia Basin samples |
Title Holder / Company: | Magellan Petroleum Australia |
Report id: | PR1995-0022 |
Tenure: | EP15 |
Year: | 1991 |
Corporate Author: | Amdel |
Abstract: | Samples were sent to Amdel from Magellan Petroleum to evaluate the suitability of them for geochronology. Thin section samples were prepared and examined with a polarising microscope. To determine the time of deposition of a sediment, the sample must contain an authigenic mineral that formed during the deposition process or immediately after, during diagenesis. The authigenic mineral must also contain K or Rb in sufficient abundance to produce detectable amounts of the radiogenic isotope (Ar or Sr) and the mineral must have remained a closed chemical system since its time of formation. The samples do not contain any authigenic minerals that could be used for geochronology. The chlorite matrix would not contain K or Rb and has a poor retentivity for the radiogenic isotopes. The samples are therefore unsuitable for dating. |
Date Added: | 20-Jun-2019 |
Appears in Collections: | Petroleum and Geothermal Tenure Reports (PEX Tenure) |
Files in this Report:
File | Size | Format | Add to Download |
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PR19950022_Evaluation_of_suitability_for_geochronology.pdf | 1.41 MB | Add |
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