9655231
Persistent Identifier: https://pid.geoscience.gov.au/sample/AU9655231
| Property | Value |
|---|---|
| id | 9655231 |
| igsn | 10.60494/5kwa-3942 |
| sample_id | Sellicks Hill Tuff |
| eno | 912526 |
| sampling_feature_name | Sellicks Hill Tuff |
| sampling_feature_type | field site |
| sample_type | outcrop specimen |
| sampling_method | outcrop sampling |
| material_class | rock |
| stratigraphic_unit | Heatherdale Shale |
| geological_province | Stansbury Basin |
| sample_remark | Cooper et al. (1992): The 3.5 cm layer contrasts with the surrounding shale in that it is slab-like, without the pervasive cleavage related to the regional deformation (attributed to the Cambro-Ordovician Delamerian Orogeny). In weathered outcrop it is inhomogeneous, more compact and apparently more coarse-grained at the base of the bed. In thin section it is now dominated by intergrown phyllosilicates, with minor fine (c. 0.1 mm) angular quartz grains. Crossed-polar microscopic examination of least-altered areas reveals about 40% of variably isotropic masses interpreted as fragments of devitrified glass separated by deformed new sericite. XRD analysis reveals predominantly illite 2MI, together with minor muscovite MI and kaolin-smectite, and with Ca-montmorillonite in more weathered samples. Illite 2M is consistent with a paragenesis involving deep burial and alteration of earlier mineral phases. |
| earth_materials | Y |
| structural_measurements | None |
| inorganic_geochemistry | None |
| organic_geochemistry | None |
| geochronology | None |
| isotope_groups | None |
| hydrochemistry | None |
| rock_properties | None |
| mineralogy | None |
| thin_sections | None |
| repository_samples | None |
| mineral_deposit_samples | None |
| mineral_deposit_waste_samples | None |
| linked_files | None |
| other_geological_data | None |
| project_name | None |
| gda94_longitude | 138.4655251 |
| gda94_latitude | -35.3560673 |
| sample_originator | ANU Research School of Earth Sciences |
| date_acquired | 2000-01-01 00:00:00 |
| Links |
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