9652145
Persistent Identifier: https://pid.geoscience.gov.au/sample/AU9652145
| Property | Value |
|---|---|
| id | 9652145 |
| igsn | 10.60494/6260-2c97 |
| sample_id | R1830309 |
| eno | 551644 |
| sampling_feature_name | Paralana 1B DW1 |
| sampling_feature_type | borehole |
| sample_type | core |
| sampling_method | core diamond |
| material_class | rock |
| stratigraphic_unit | Mernmerna Formation |
| geological_province | Arrowie Basin |
| sample_remark | From Pontifex Report 9884, 31 March 2011: Heterogeneous and weakly schistose, sericite-hematite-quartz altered fine fragmental facies with scattered small quartz grains, minor diffuse leucoxene and trace zircon grains. Could be interpreted as acid volcanic breccia or tuff, but poor textural preservation makes this difficult to distinguish from sheared, altered metasediment, albeit perhaps volcaniclastic. Sample is a heterogeneous and weakly schistose, sericite-hematite-quartz altered fine fragmental facies with scattered small quartz grains, minor diffuse leucoxene and trace zircon grains. Could be interpreted as acid volcanic breccia or tuff, but poor textural preservation makes this difficult to distinguish from sheared, altered metasediment, albeit perhaps volcaniclastic. Visually estimated mineralogy = Mineral Abundance = Origin/Location: 1) Sericite +/- extremely fine quartz = Dominant = Pervasive alteration, poorly defining a fine foliation matrix, also more concentrated in small scattered fragments. 2) Earthy hematite = Subordinate = Staining throughout, locally concentrated in lenses or fragments. 3) Quartz sand size grains = Minor = Disseminated through matrix and as angular to rounded grains in small fragments. 4) Leucoxene = Trace = Ex oxide and diffuse. 5) Zircon = Trace = Inherited accessories 0.1 mm. 6) Carbonate and sericite = Sparse = In microfractures. Hand specimen: These rock chips are dominated by variable concentrations of sericite and earthy hematite, partly forming a fine foliated matrix, also more concentrated to poorly define elliptical or irregular probable fragments to 8 mm long. Some fragments lack inclusions and may represent altered volcanic glass. Other fragments contain angular quartz small grains, subangular to rounded, some vaguely rectangular patches of sericite that could represent completely altered feldspar microphenocrysts. Sparse lamellar sericite could represent small flakes of mica, possibly biotite. Rare small quartz grains have embayed margins. Minor leucoxene is dispersed and occurs in some fragments and there are rare zircon grains about 0.1 mm in size. https://minerals.sarig.sa.gov.au/RockSampleDetails.aspx?SampleNo=1830309 |
| 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 | EFTF - Isotopic Atlas of Australia |
| gda94_longitude | 139.713338 |
| gda94_latitude | -30.2097099 |
| sample_originator | Geological Survey of South Australia |
| date_acquired | None |
| Links |
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