Property Value
id 2130080
igsn 10273/AU2130080
sample_id TH438
eno 11424
sampling_feature_name GSQ Mitchell 1
sampling_feature_type borehole
sample_type core
sampling_method core diamond
material_class rock
earth_materials Y
stratigraphic_unit None
geological_province Thomson Orogen
sample_remark GSQ Mitchell 1 was drilled in 1972 by the Geological Survey of Queensland. It intersected high-grade metasedimentary rocks of the Nebine Ridge at 717.9 metres after penetrating sediments of the Surat Basin (Wallin, 1974). The metasedimentary units in Mitchell 1 consist of interbedded metasiltstone, metasandstone and quartzite. The basement lithologies are phyllitic to schistose and generally steeply dipping with s0 parallel to s1. Sample 2130080/TH438 from 767.49-770.53 metres consists of laminated quartz-mica phyllite. In thin section the rock is characterised by alternating quartz-rich and phyllosilicate-rich layers. Quartz is highly strained and recrystallised. Phyllosilicate-rich layers include varying proportions of quartz and exhibit anastomosing shear zones. Detrital grains include quartz, muscovite (identified as larger grains within phyllosilicate-rich layers) and rare feldspar.
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 None
gda94_longitude 147.116667
gda94_latitude -26.416667
sample_originator Cross, A.J.
date_acquired None
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