This paper presents the preliminary results of a study investigating the stratigraphy and basic geotechnical properties of the surficial geology deposits observed in the bluffs around the city of Whitehorse. A total of eleven sections were examined on both the east and west banks of the Yukon River. Representative stratigraphic units were analysed for grain size distribution; deposits ranged in size from silt and clay to coarse gravel. Most of the observed sediments represent the glaciolacustrine depositional environment of Glacial Lake Laberge with the exception of a loess unit exposed near the top of the sections. Consistency indices of seven silt and clay-rich samples collected in the bluffs surrounding Whitehorse indicate a low plasticity comparable with other Canadian loess units and the glaciolacustrine bluffs around Kamloops and in the Elk Valley of British Columbia. The soil unconfined compressive strength was estimated using a pocket penetrometer and the dry silt and clay-rich units were found to have strength estimates up to two orders of magnitude greater than the sand-rich units.

URL: https://geoscience.data.qld.gov.au/dataset/cr007550 ATP 246, SURAT BASIN REPORT ON PRECIPICE SANDSTONE PROSPECTS AND DRILLING PROPOSAL BY L N BROWN, JULY 1979 AND ENCLOSURES (3) - P

This report demonstrates that the stratigraphic, compositional and textural data are sufficient to easily distinguish the four major granitic rock types in the area. This is an essential first step in exploration for intrusion-related mineral occurrences since the known occurrences are associated with only two of the four granitic rock types. The four granitic rock types distinguished are: Mid-Jurassic pink quartz monzonite, Mid-Cretaceous biotite quartz monzonite, Upper Triassic-Lower Jurassic hornblende granodiorite, and Lower Tertiary smoky quartz granites. The latter two intrusives are associated with significant mineralization. The copper-iron skarn deposits in Upper Triassic banded limestone are associated with Upper Triassic granodiorite. The nature of the Upper Triassic granodiorite distinguishes it from porphyry copper-bearing granitic rocks of similar age in British Columbia. The Upper Triassic granodiorite batholiths in the Yukon Crystalline Terrane are not a good prospect for porphyry-type mineralization. The polymetallic nature and the alteration associated with the Lower Tertiary subvolcanic rocks suggest they have good potential for porphyry copper mineralization of the Casino type.

Mapping was carried out in the summer of 2018 by Rosie Cobbett and Halley Keevil for areas north of the Tintina fault; additional geological data provided by G. Jilson. Geology south of the Tintina fault is from YGS Open File 2002-9. Two areas north of the Tintina fault are extensively thermally and hydrothermally altered. The interpretation of fault traces through areas of poor rock exposure was guided by a Yukon wide geophysical survey of magnetic data.

Magmatism in the Nahanni region, which defines the eastern extent of the Tintina Gold Province, is generally associated with tungsten mineralization and/or gold-copper-antimony-bismuth-lead-zinc metal occurrences. Intrusions are subalkaline, granitic to granodioritic, and contain several types of textural variations and highly evolved phases. The intrusions range from large composite batholiths to small stocks with associated felsic dykes and veins. Initial U-Pb and Ar-Ar geochronology reveals ages of 97.5-95 Ma with short (0.5-1.5 m.y.) cooling periods, although the intrusion associated with the Cantung tungsten-skarn orebody cooled over a relatively long period (3 m.y.). Magmatism in the area has been interpreted as crustally derived, however, the rare earth element primitive-mantlenormalized profile revealed negative niobium, tantalum and titanium anomalies suggesting an arctype setting. Furthermore, the granites lack volumetrically significant, primary peraluminous mineralogies characteristic of S-type granites.

URL: https://geoscience.data.qld.gov.au/dataset/cr041820 GSQ RECORD 1984/06: CAINOZOIC STUDIES IN QUEENSLAND (THESIS SUBMITTED IN SUPPORT OF AN APPLICATION FOR PROMOTION TO SENIOR GEOLOGIST.)

URL: https://geoscience.data.qld.gov.au/dataset/ds000117 This dataset provides continuous portable XRF spectroscopy analyses of some key mineral deposit types in North West Queensland, including metasomatic iron (oxide), alkalic-calcic IOCG (‘family’), sediment-hosted copper (Cu), siliciclastic-carbonate zinc-lead (Zn-Pb, ‘SEDEX’) and siliciclastic-mafic silver-lead-zinc (Ag-Pb-Zn, BHT) deposits. The data is part of the New Economy Minerals Initiative (NEMI), also known as the Reference Collection Project, which aims to establish a comprehensive collection of geological samples and datasets to support the characterisation of mineral systems and deposit types across Queensland’s North West Minerals Province. This initiative facilitates the identification of mineral footprints and geochemical signatures that are critical for exploration and mining efforts in the region. The analyses were performed using portable XRF technology, a non-destructive analytical technique capable of detecting up to 41 elements, ranging from Na to U, with a high degree of precision. Additionally, seven lighter elements were analysed, though with reduced accuracy, and the use of helium-purging during the analysis effectively mitigated ionisation interference from ambient air. Minalyze Pty Ltd deployed this technology to provide automated and continuous drill core analysis in a secure, radiation-enclosed environment, ensuring the integrity and safety of the data collection process. The Minalyzer CS instrument was stationed at the Exploration Data Centre in Brisbane during two core scanning campaigns: February to August 2021 and April to July 2023. In total, 40 drill holes were analysed across these two campaigns, yielding a comprehensive dataset. Data from the 15 drill holes analysed in 2021 is available via the GSQ Open Data Portal, while the dataset for the 25 additional drill holes analysed in 2023 can be accessed below. The dataset includes dry core tray photographs and associated geochemical data, presented at both 10 cm and 1 m intervals in .csv format. Core imagery and further data visualisation can be explored through the Minalogger platform.

URL: https://geoscience.data.qld.gov.au/dataset/cr005204 ML 152, 164-165, (BUNDABERG), ROCKY POINT AREA, ENVIRONMENTAL STUDY REPORT FOR PROPOSED MINERAL SAND MINING OPERATIONS, APRIL 1975