Property Value
id 2169068
igsn 10273/AU2169068
sample_id 2013831011a
eno 544802
sampling_feature_name Yarralee 1
sampling_feature_type borehole
sample_type core
sampling_method core diamond
material_class rock
stratigraphic_unit None
geological_province Thomson Orogen
sample_remark Drill-hole Yarrallee 1 penetrated the Eromanga Basin and underlying Thomson metamorphic basement to a total depth of 687.32 metres (Planet Exploration Pty Ltd, 1970). The Yarrallee 1 drill-hole intersects the Gumbalara zone, a very large area of low and relatively bland magnetic response essentially paralleling the southern margin of the Thomson Orogen. The sample selected for geochronology was collected from the depth interval of 684.3 to 687.2 metres and is a grey to green, finely-bedded, very fine-grained pelitic siltstone, showing soft sediment and (polyphase) tectonic folding. Quartz veining is present and sulfide mineralisation occurs in some fractures and bedding planes. SHRIMP analysis of this sample will provide an indication of the maximum depositional age of this unit, and a zircon provenance age spectrum, for comparison with other regional metasedimentary rocks.
earth_materials Y
structural_measurements None
inorganic_geochemistry Y
organic_geochemistry None
geochronology Y
isotope_groups None
hydrochemistry None
rock_properties None
mineralogy None
thin_sections None
repository_samples Y
mineral_deposit_samples None
mineral_deposit_waste_samples None
linked_files None
other_geological_data None
project_name Thomson drilling project
gda94_longitude 143.3729326
gda94_latitude -29.2502662
sample_originator Champion, D.C.
date_acquired 2013-12-20 00:00:00
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