Assessment of soil parameters and pathfinder elements for gold exploration in a mining-disturbed granitic terrain, Southeast New South Wales, Australia

Ken MCQUEEN

    Research output: A Conference proceeding or a Chapter in BookConference contribution

    Abstract

    Geochemical exploration for gold in historic or mature goldfields can be complicated by mining-related surface disturbance, including alluvial workings, reef mining and ore processing, as well as from other related anthropogenic activities such as land clearing and farming. The Braidwood region in southeast New South Wales is such an area, having been extensively worked for alluvial gold from the first gold rush of 1851 to the period of large scale mechanical dredging, which ended in 1914. Total gold production was 1.25 million ozs, making this the 6th largest alluvial goldfield in Australia (Middleton 1970). Major disturbance was along the rivers, creeks and alluvial flats, but also extended to adjacent slopes, which were commonly worked by ground sluicing or ‘surfacing’ and to areas of reef mining. Modern gold exploration in the area is focussed on locating primary bedrock gold deposits within the Braidwood Granodiorite, the major host unit to the known deposits, such as Dargues Reef, near Majors Creek. These intrusion-related gold deposits appear to be the source for the extensive alluvial gold concentrations and have a primary geochemical association of Au-Cu-Pb-Bi-Te-Sb with As and Fe in pyrite (McQueen & Perkins 1995). Geochemical exploration using shallow 10-15 cm A horizon) soil sampling has had limited success, even in areas away from major disturbance from historic alluvial mining (e.g. Duncan 1984). The aim of this study was to make a detailed assessment of the soils in the area, particularly around Majors Creek, and to determine the most appropriate soil fraction, horizon and components to sample and the most useful suite of elements, for improved geochemical exploration.
    Original languageEnglish
    Title of host publicationProceedings of the 27th International Applied Geochemistry Symposium 2015
    Place of PublicationUSA
    PublisherAssociation of Applied Geochemists
    Pages1-21
    Number of pages21
    Publication statusPublished - 2015
    Event27th International Applied Geochemistry Symposium - Tucson, United States
    Duration: 20 Apr 201524 Apr 2015

    Conference

    Conference27th International Applied Geochemistry Symposium
    CountryUnited States
    CityTucson
    Period20/04/1524/04/15

    Fingerprint

    gold
    soil
    reef
    soil horizon
    disturbance
    parameter
    dredging
    granodiorite
    pyrite
    bedrock
    human activity
    sampling
    river
    creek

    Cite this

    MCQUEEN, K. (2015). Assessment of soil parameters and pathfinder elements for gold exploration in a mining-disturbed granitic terrain, Southeast New South Wales, Australia. In Proceedings of the 27th International Applied Geochemistry Symposium 2015 (pp. 1-21). USA: Association of Applied Geochemists.
    MCQUEEN, Ken. / Assessment of soil parameters and pathfinder elements for gold exploration in a mining-disturbed granitic terrain, Southeast New South Wales, Australia. Proceedings of the 27th International Applied Geochemistry Symposium 2015. USA : Association of Applied Geochemists, 2015. pp. 1-21
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    title = "Assessment of soil parameters and pathfinder elements for gold exploration in a mining-disturbed granitic terrain, Southeast New South Wales, Australia",
    abstract = "Geochemical exploration for gold in historic or mature goldfields can be complicated by mining-related surface disturbance, including alluvial workings, reef mining and ore processing, as well as from other related anthropogenic activities such as land clearing and farming. The Braidwood region in southeast New South Wales is such an area, having been extensively worked for alluvial gold from the first gold rush of 1851 to the period of large scale mechanical dredging, which ended in 1914. Total gold production was 1.25 million ozs, making this the 6th largest alluvial goldfield in Australia (Middleton 1970). Major disturbance was along the rivers, creeks and alluvial flats, but also extended to adjacent slopes, which were commonly worked by ground sluicing or ‘surfacing’ and to areas of reef mining. Modern gold exploration in the area is focussed on locating primary bedrock gold deposits within the Braidwood Granodiorite, the major host unit to the known deposits, such as Dargues Reef, near Majors Creek. These intrusion-related gold deposits appear to be the source for the extensive alluvial gold concentrations and have a primary geochemical association of Au-Cu-Pb-Bi-Te-Sb with As and Fe in pyrite (McQueen & Perkins 1995). Geochemical exploration using shallow 10-15 cm A horizon) soil sampling has had limited success, even in areas away from major disturbance from historic alluvial mining (e.g. Duncan 1984). The aim of this study was to make a detailed assessment of the soils in the area, particularly around Majors Creek, and to determine the most appropriate soil fraction, horizon and components to sample and the most useful suite of elements, for improved geochemical exploration.",
    author = "Ken MCQUEEN",
    year = "2015",
    language = "English",
    pages = "1--21",
    booktitle = "Proceedings of the 27th International Applied Geochemistry Symposium 2015",
    publisher = "Association of Applied Geochemists",

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    MCQUEEN, K 2015, Assessment of soil parameters and pathfinder elements for gold exploration in a mining-disturbed granitic terrain, Southeast New South Wales, Australia. in Proceedings of the 27th International Applied Geochemistry Symposium 2015. Association of Applied Geochemists, USA, pp. 1-21, 27th International Applied Geochemistry Symposium, Tucson, United States, 20/04/15.

    Assessment of soil parameters and pathfinder elements for gold exploration in a mining-disturbed granitic terrain, Southeast New South Wales, Australia. / MCQUEEN, Ken.

    Proceedings of the 27th International Applied Geochemistry Symposium 2015. USA : Association of Applied Geochemists, 2015. p. 1-21.

    Research output: A Conference proceeding or a Chapter in BookConference contribution

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    N2 - Geochemical exploration for gold in historic or mature goldfields can be complicated by mining-related surface disturbance, including alluvial workings, reef mining and ore processing, as well as from other related anthropogenic activities such as land clearing and farming. The Braidwood region in southeast New South Wales is such an area, having been extensively worked for alluvial gold from the first gold rush of 1851 to the period of large scale mechanical dredging, which ended in 1914. Total gold production was 1.25 million ozs, making this the 6th largest alluvial goldfield in Australia (Middleton 1970). Major disturbance was along the rivers, creeks and alluvial flats, but also extended to adjacent slopes, which were commonly worked by ground sluicing or ‘surfacing’ and to areas of reef mining. Modern gold exploration in the area is focussed on locating primary bedrock gold deposits within the Braidwood Granodiorite, the major host unit to the known deposits, such as Dargues Reef, near Majors Creek. These intrusion-related gold deposits appear to be the source for the extensive alluvial gold concentrations and have a primary geochemical association of Au-Cu-Pb-Bi-Te-Sb with As and Fe in pyrite (McQueen & Perkins 1995). Geochemical exploration using shallow 10-15 cm A horizon) soil sampling has had limited success, even in areas away from major disturbance from historic alluvial mining (e.g. Duncan 1984). The aim of this study was to make a detailed assessment of the soils in the area, particularly around Majors Creek, and to determine the most appropriate soil fraction, horizon and components to sample and the most useful suite of elements, for improved geochemical exploration.

    AB - Geochemical exploration for gold in historic or mature goldfields can be complicated by mining-related surface disturbance, including alluvial workings, reef mining and ore processing, as well as from other related anthropogenic activities such as land clearing and farming. The Braidwood region in southeast New South Wales is such an area, having been extensively worked for alluvial gold from the first gold rush of 1851 to the period of large scale mechanical dredging, which ended in 1914. Total gold production was 1.25 million ozs, making this the 6th largest alluvial goldfield in Australia (Middleton 1970). Major disturbance was along the rivers, creeks and alluvial flats, but also extended to adjacent slopes, which were commonly worked by ground sluicing or ‘surfacing’ and to areas of reef mining. Modern gold exploration in the area is focussed on locating primary bedrock gold deposits within the Braidwood Granodiorite, the major host unit to the known deposits, such as Dargues Reef, near Majors Creek. These intrusion-related gold deposits appear to be the source for the extensive alluvial gold concentrations and have a primary geochemical association of Au-Cu-Pb-Bi-Te-Sb with As and Fe in pyrite (McQueen & Perkins 1995). Geochemical exploration using shallow 10-15 cm A horizon) soil sampling has had limited success, even in areas away from major disturbance from historic alluvial mining (e.g. Duncan 1984). The aim of this study was to make a detailed assessment of the soils in the area, particularly around Majors Creek, and to determine the most appropriate soil fraction, horizon and components to sample and the most useful suite of elements, for improved geochemical exploration.

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    BT - Proceedings of the 27th International Applied Geochemistry Symposium 2015

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    ER -

    MCQUEEN K. Assessment of soil parameters and pathfinder elements for gold exploration in a mining-disturbed granitic terrain, Southeast New South Wales, Australia. In Proceedings of the 27th International Applied Geochemistry Symposium 2015. USA: Association of Applied Geochemists. 2015. p. 1-21