Property Value
id 1472027
igsn 10273/AU1472027
sample_id 77220100
eno 136583
sampling_feature_name 77220100
sampling_feature_type field site
sample_type outcrop specimen
sampling_method outcrop sampling
material_class rock
earth_materials Y
stratigraphic_unit Comstock Formation
geological_province Dundas Trough
sample_remark Adams et al (1985 AJES) paraphrased: "A dense, purplish-grey welded ignimbrite within the upper unit on Zig-zag Hill [previously described and illustrated in Corbett et al (1974) Fig. 9], was sampled for zircon analysis. The tuff contains phenocrysts of embayed quartz and corroded plagioclase in a matrix consisting mainly of devitrified glass shards. Alteration is expressed by the occurrence of patches of chlorite, carbonate, fibrous feldspar and quartz which replace the groundmass and form rims around phenocrysts."
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 Y
mineral_deposit_samples None
mineral_deposit_waste_samples None
linked_files None
other_geological_data Y
project_name None
gda94_longitude 145.5796238
gda94_latitude -42.0248953
sample_originator Black, L.P.
date_acquired None
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