Syenitic Group intrusions of the Archean Kurnalpi Terrane, Yilgarn Craton: Hosts to ancient alkali porphyry gold deposits?

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Abstract

Archean alkali-rich (Syenitic Group) intrusions in the Eastern Goldfields Superterrane, Yilgarn Craton, are chemically similar to intrusions associated with Phanerozoic alkali porphyry systems. High-temperature potassic and ferruginous alteration associated with the Yilgarn intrusions are also similar to those in Phanerozoic counterparts but these are generally not well mineralized. Disseminated and fracture-controlled gold mineralization associated with Syenitic Group intrusions is commonly hosted by mesothermal albite-carbonate-pyrite assemblages, the origin of which is ambiguous. This communication aims to stimulate discussion on the origin of gold in and around Syenitic Group intrusions and the apparent absence of significant gold or copper mineralization in associated high-temperature alteration. Gold associated with Syenitic Group intrusions in the Yilgarn Craton has many similar characteristics to disseminated gold deposits associated with syenitic intrusions in the Abitibi greenstone belt, Canada, and may be present in other Archean greenstone belts.

Original languageEnglish
Pages (from-to)262-268
Number of pages7
JournalOre Geology Reviews
Volume96
DOIs
Publication statusPublished - 1 May 2018

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Gold deposits
Alkalies
porphyry
Gold
craton
Archean
terrane
gold
greenstone belt
Phanerozoic
Carbonates
Copper
mineralization
Temperature
albite
Communication
pyrite
communication
copper
carbonate

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title = "Syenitic Group intrusions of the Archean Kurnalpi Terrane, Yilgarn Craton: Hosts to ancient alkali porphyry gold deposits?",
abstract = "Archean alkali-rich (Syenitic Group) intrusions in the Eastern Goldfields Superterrane, Yilgarn Craton, are chemically similar to intrusions associated with Phanerozoic alkali porphyry systems. High-temperature potassic and ferruginous alteration associated with the Yilgarn intrusions are also similar to those in Phanerozoic counterparts but these are generally not well mineralized. Disseminated and fracture-controlled gold mineralization associated with Syenitic Group intrusions is commonly hosted by mesothermal albite-carbonate-pyrite assemblages, the origin of which is ambiguous. This communication aims to stimulate discussion on the origin of gold in and around Syenitic Group intrusions and the apparent absence of significant gold or copper mineralization in associated high-temperature alteration. Gold associated with Syenitic Group intrusions in the Yilgarn Craton has many similar characteristics to disseminated gold deposits associated with syenitic intrusions in the Abitibi greenstone belt, Canada, and may be present in other Archean greenstone belts.",
keywords = "Alkali porphyry, Gold, Syenite, Yilgarn",
author = "Walter Witt and Kevin Cassidy and Lu, {Yong Jun} and Steffen Hagemann",
year = "2018",
month = "5",
day = "1",
doi = "10.1016/j.oregeorev.2017.08.037",
language = "English",
volume = "96",
pages = "262--268",
journal = "Ore Geology Reviews",
issn = "0169-1368",
publisher = "Pergamon",

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TY - JOUR

T1 - Syenitic Group intrusions of the Archean Kurnalpi Terrane, Yilgarn Craton

T2 - Hosts to ancient alkali porphyry gold deposits?

AU - Witt, Walter

AU - Cassidy, Kevin

AU - Lu, Yong Jun

AU - Hagemann, Steffen

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Archean alkali-rich (Syenitic Group) intrusions in the Eastern Goldfields Superterrane, Yilgarn Craton, are chemically similar to intrusions associated with Phanerozoic alkali porphyry systems. High-temperature potassic and ferruginous alteration associated with the Yilgarn intrusions are also similar to those in Phanerozoic counterparts but these are generally not well mineralized. Disseminated and fracture-controlled gold mineralization associated with Syenitic Group intrusions is commonly hosted by mesothermal albite-carbonate-pyrite assemblages, the origin of which is ambiguous. This communication aims to stimulate discussion on the origin of gold in and around Syenitic Group intrusions and the apparent absence of significant gold or copper mineralization in associated high-temperature alteration. Gold associated with Syenitic Group intrusions in the Yilgarn Craton has many similar characteristics to disseminated gold deposits associated with syenitic intrusions in the Abitibi greenstone belt, Canada, and may be present in other Archean greenstone belts.

AB - Archean alkali-rich (Syenitic Group) intrusions in the Eastern Goldfields Superterrane, Yilgarn Craton, are chemically similar to intrusions associated with Phanerozoic alkali porphyry systems. High-temperature potassic and ferruginous alteration associated with the Yilgarn intrusions are also similar to those in Phanerozoic counterparts but these are generally not well mineralized. Disseminated and fracture-controlled gold mineralization associated with Syenitic Group intrusions is commonly hosted by mesothermal albite-carbonate-pyrite assemblages, the origin of which is ambiguous. This communication aims to stimulate discussion on the origin of gold in and around Syenitic Group intrusions and the apparent absence of significant gold or copper mineralization in associated high-temperature alteration. Gold associated with Syenitic Group intrusions in the Yilgarn Craton has many similar characteristics to disseminated gold deposits associated with syenitic intrusions in the Abitibi greenstone belt, Canada, and may be present in other Archean greenstone belts.

KW - Alkali porphyry

KW - Gold

KW - Syenite

KW - Yilgarn

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U2 - 10.1016/j.oregeorev.2017.08.037

DO - 10.1016/j.oregeorev.2017.08.037

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VL - 96

SP - 262

EP - 268

JO - Ore Geology Reviews

JF - Ore Geology Reviews

SN - 0169-1368

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