7935618
Persistent Identifier: https://pid.geoscience.gov.au/sample/AU7935618
| Property | Value |
|---|---|
| id | 7935618 |
| igsn | 10273/AU7935618 |
| sample_id | MP2 |
| eno | 816989 |
| sampling_feature_name | MP2 |
| sampling_feature_type | field site |
| sample_type | outcrop specimen |
| sampling_method | outcrop sampling |
| material_class | rock |
| earth_materials | Y |
| stratigraphic_unit | Scamander Tier Granodiorite |
| geological_province | Northeast Tasmania Element |
| sample_remark | McClenaghan & Higgins (1993): Age data from the Scamander Tier phase (Samples 83/21, /22, /24, /27, /29, /30, /31-1 & 31-2, /33-1 & 33-2, 37791, MP2, MSH183, 177 & l78) is consistent suggesting little resetting took place (averaged K-Ar ages 392.3 +/- 1.6 Ma; Rb-Sr ages 387.6 +/- 0.6 Ma). The Scamander Tier dyke, a N-S trending biotite-hornblende granodiorite body stretching from Binalong Bay to Scamander, is a later intrusion. The area of outcrop SW of Binalong Bay is interpreted as part of this dyke rather than part of the George River body (as proposed by McClenaghan et al., 1987), on the basis of its greater geochemical similarity to the rocks of the Scamander Tier dyke than to those of the George River pluton. In addition, a narrow east-west trending, dyke-shaped offshoot of the main dyke extends west from near the northern end, bisects the Mt Pearson pluton, and connects to a broad patch of granodiorite outcrop in the Goshen area. Farther south in the Catos Creek area, a broad north-south trending dyke of the same composition is considered to be part of the same intrusive phase. Turner et al. (1986) regarded these bodies as the hypabyssal feeders to the St Marys porphyrite extrusive body which crops out in the St Marys Pass area. The dyke is chilled against the George River pluton near St Helens, and also against the Mt Pearson pluton along the narrow east-west part of the dyke and on the eastern boundary of the broader mass farther west, thus demonstrating that the dyke postdates both those bodies. The St Marys Porphyrite body is older than the Piccaninny Creek granite body to its south, as the latter cuts discordantly across the axial surface of a synclinal structure in the porphyrite. The Piccaninny Creek body is also probably younger than the Piccaninny Point/Long Point granodiorite body lying to its south since it also cuts across the line of that body's western boundary. |
| 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 | EFTF - Isotopic Atlas of Australia |
| gda94_longitude | 148.2253029 |
| gda94_latitude | -41.2804645 |
| sample_originator | Waltenberg, K. |
| date_acquired | 2000-01-01 00:00:00 |
| Links |
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