Late Archean convergent margin tectonics and gold mineralization: A new look at the Norseman-Wiluna Belt, Western Australia

Barley, Mark; Eisenlohr, B.N.; Groves, David; Perring, Caroline S.; Vearncombe, J.R.

doi:10.1130/0091-7613(1989)017<0826:lacmta>2.3.co;2

Cited by 127 publications

(30 citation statements)

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“…A greater problem however, seems to be in reconciling the assemblages of the various terranes that have asymmetric distribution of their rock associations and their timing (e.g. Hallberg 1985Hallberg , 1986Barley et al 1989Barley et al , 2008Swager 1997;Kositcin et al 2008). …”

Section: Correlations With the Rest Of The Yilgarn Cratonmentioning

confidence: 98%

“…Bailey 1999), resulting in extension and thinning of the crust (Rey et al 2003). Barley et al (1989) proposed that the NorsemanWiluna Belt was a convergent margin, with the rocks to the east of the Keith-Kilkenny lineament interpreted as a volcanic arc succession, and those to the west interpreted as a marginal basin succession. With further work (e.g.…”

Section: Introductionmentioning

confidence: 97%

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Adding pieces to the puzzle: episodic crustal growth and a new terrane in the northeast Yilgarn Craton, Western Australia

Pawley

Wingate

Kirkland

et al. 2012

Australian Journal of Earth Sciences

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Section: Correlations With the Rest Of The Yilgarn Cratonmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Adding pieces to the puzzle: episodic crustal growth and a new terrane in the northeast Yilgarn Craton, Western Australia

Pawley

Wingate

Kirkland

et al. 2012

Australian Journal of Earth Sciences

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“…The pulses of dominantly tholeiitic mafic-ultramafic intrusive magmatism described here for the northern Murchison A range of models have been proposed to account for aspects of the formation of components in the Yilgarn Craton including: (i) plume models (Archibald et al 1978;Campbell & Hill 1988); (ii) rift models (Swager 1997); and (iii) arc-accretion models (Barley et al 1989;Myers 1995;Kositcin et al 2008). Although these models were primarily developed for the Eastern Goldfields Superterrane, they nevertheless must be assessed for their ability to account for tectono-magmatic processes in the adjacent Youanmi Terrane.…”

Section: Craton-scale Considerationsmentioning

confidence: 99%

“…Arc-accretion models that have been applied to the Eastern Goldfields Superterrane and more broadly to the rest of the Yilgarn Craton have gained wide currency (Barley et al 1989;Kositcin et al 2008). These models suggest that arc-accretion tectonics, and terrane amalgamation, occurred from *2720 to 2660 Ma.…”

Section: Arc-accretion Modelmentioning

confidence: 99%

Age and significance of voluminous mafic–ultramafic magmatic events in the Murchison Domain, Yilgarn Craton

Ivanic

Wingate

Kirkland

et al. 2010

Australian Journal of Earth Sciences

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“…Numerous granitic intrusions into this sequence (interna1 granitoids) have been interpreted to be the result of partial melting of older sialic basement during regional metamorphism (Archibald et al 1978). Magmatism within the NWGB is believed to be synkinematic and to have taken place approximately 2660-2630 Ma (Barley et al 1989). Gold mineralization occurs throughout the stratigraphic sequence and occurs in al1 lithologies including the granitoid intrusions.…”

Section: Examples From the Norseman-wiluna Greenstone Beltmentioning

confidence: 99%

A comparison of alteration assemblages associated with Archean gold deposits in Western Australia and Paleozoic gold deposits in the southeast United States

Ririe¹

1990

Can. J. Earth Sci.

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A comparison of high-alumina mineral assemblages spatially associated with the Haile and Brewer gold deposits in the Paleozoic Carolina slate belt (CSB) of the southeast United States and the Sons of Gwalia and Mount Celia gold deposits in the Archean Norseman-Wiluna greenstone belt (NWGB) in Western Australia suggests a similar hydrothermal origin and subsequent metamorphic and deformational history. A common hydrothermal origin is supported by the striking similarity in whole-rock chemistry, even though there were probably significant variations in original unaltered protoliths. An analysis of rocks from each of the deposits that contain high-alumina minerals demonstrates that the protoliths were leached of alkalis with respect to aluminum and have a ratio of A1203 / Na10 + CaO + K 2 0 greater than three. Although the rocks contain abundant high-alumina minerals, the aluminum content in these rocks is not unusually high, and it does not appear that there has been any significant transport of aluminum either into or out of the rocks that were altered.The most common high-alumina minerals found in rocks affected by the feldspar destructive alteration event include andalusite, kyanite, pyrophyllite, kaolinite, and sericite. Other minerals present in variable amounts include diaspore, chloritoid, alunite, natroalunite: paragonite, and topaz. It is possible that some of these minerals formed during the early hydrothermal alteration event and were recrystallized during metamorphism. Regardless of when the high-alumina minerals formed, textural relations suggest that the rocks had been hydrothermally altered by the time the metamorphic minerals formed. A comparison of alteration from the deposits studied in the CSB and the NWGB suggests there are many similarities to acid-sulfate alteration associated with geothermal areas, such as Yellowstone Park, Wyoming, and with acid-sulfate gold deposits, such as Goldfield, Nevada. Thus, it is possible that the protolith of the metamorphosed rocks in the CSB and NWGB contained an alteration assemblage that included alunite, pyrophyllite, and kaolinite.A generalized paragenetic sequence determined from petrographic and field observations, beginning with regional metamorphism, follows: ( i ) formation of andalusite, kyanite, chloritoid, and topaz during prograde metamorphism, depending on whole rock chemistry, (ii) formation of pyrophyllite and quartz-rich pods during silicification of aluminosilicate-bearing rocks, (iii) bedding parallel schistosity and fracturing produced by a deformational event, (iv) fractures filled by quartz, sericite, pyrophyllite, or calcite, ( v ) folding of early layering in the rocks to form a crenulation cleavage accompanied by introduction of quartz veins at high angles to foliation; and (vi) retrograde metamorphism of andalusite-kyanite-pyrophyllite to produce an assemblage of kaolinite k diaspore.The spatial association of the acid-sulfate alteration with gold mineralization, together with comparison of analogous alteration associated with younger u...

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Late Archean convergent margin tectonics and gold mineralization: A new look at the Norseman-Wiluna Belt, Western Australia

Cited by 127 publications

References 0 publications

Adding pieces to the puzzle: episodic crustal growth and a new terrane in the northeast Yilgarn Craton, Western Australia

Adding pieces to the puzzle: episodic crustal growth and a new terrane in the northeast Yilgarn Craton, Western Australia

Age and significance of voluminous mafic–ultramafic magmatic events in the Murchison Domain, Yilgarn Craton

A comparison of alteration assemblages associated with Archean gold deposits in Western Australia and Paleozoic gold deposits in the southeast United States

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