The origin of the albite-rich rocks enclosing the cobaltian pyrite deposit at Thackaringa, N.S.W., Australia

Plimer, I. R.

doi:10.1007/bf00206025

Cited by 43 publications

(15 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These and similar albite-rich and related quartz-feldspar-rich leucogneisses in the Willyama Orogenic Domain have been generally interpreted to have had a felsic to intermediate volcanic source, but with possible sodic or alkaline affinities (Stanton 1976b;Plimer 1977;Stevens et al 1980;Willis 1982;Willis et al 1983;Ashley 1984). Near Kalabity, the probable premetamorphic alkaline igneous complex at North Billeroo (Bell et al 1979) could represent a suitable source region.…”

Section: Progenitor Materialsmentioning

confidence: 95%

Piemontite‐bearing rocks from the Olary District, South Australia

Ashley¹

1984

Australian Journal of Earth Sciences

View full text Add to dashboard Cite

Section: Progenitor Materialsmentioning

confidence: 95%

Piemontite‐bearing rocks from the Olary District, South Australia

Ashley¹

1984

Australian Journal of Earth Sciences

View full text Add to dashboard Cite

“…4) have been interpreted as evaporitic analcite tuffs (Plimer, 1977;Brown et al, 1983). However, they have higher Na contents than is typical of such lithologies, and lack the fine-scale banding that is present in probable tuffs in the adjacent Olary block (Cook and Ashley, 1992).…”

Section: Alternative Stratigraphic Interpretationsmentioning

confidence: 99%

Regional oxygen isotope zonation at Broken Hill, New South Wales, Australia; large-scale fluid flow and implications for Pb-Zn-Ag mineralization

Cartwright

1999

Economic Geology

View full text Add to dashboard Cite

Metasedimentary and metavolcanic rocks at Broken Hill, Australia, show regional-scale lowering of 8•sO values from as high as 16 per mil in Paragon Group metasedimentary rocks to values as low as 7 per mil within a few hundreds of meters of Pb-Zn-Ag orebodies. Such large-scale oxygen isotope resetting cannot be achieved by closed-system processes (such as partial melting or devolatization), implying that the rocks were affected by fluid flow. The preservation of peak metamorphic •sO fractionations between coexisting minerals, and a lack of correlation between 81sO values and the intensity of retrogression, suggests that oxygen isotope resetting occurred at, or prior to, the peak of regional metamorphism. Fluid flow during the peak of regional metamorphism is unlikely due to widespread fluid-absent partial melting and internal buffering of volatile activities at that time. Thus, fluid flow most probably predated regional metamorphism. The association of rocks with low 8•sO values with the Pb-Zn-Ag orebodies suggests a link with mineralization. The 8•sO values of rocks adjacent to the orebodies are similar to those recorded in volcanic-hosted massive sulfide deposits where convective circulation of ocean water has occurred. Base metal mineralization at Broken Hill may have occurred at hydrothermal vents at, or close to, the sea floor producing localized low 8•sO values with later kilometer-scale fluid circulation, possibly driven by the same or related intrusions, eausing regional resetting of oxygen isotopes. However, mineralization in skarn systems associated with pre-regional metamorphic granites is also a plausible model that could explain the regional 8•sO trends and much of the other geochemical data. Alternatively, the large-scale resetting of oxygen isotopes may be unrelated to mineralization. While the stable isotope data may not unambiguously constrain the origin of the base metal orebody, they indicate that mineralization most probably occurred prior to regional metamorphism.

show abstract

“…Origins involving Na migration in metamorphism (Bowes and Con very 1966) could relate to alkali depletion of hornblendeschist (see below) but are opposed by the lack of an apparent spatial relationship between the rock types. The albitic schist resembles rocks regarded as metamorphosed keratophyric tuff in New South Wales (Plimer 1977;Leitch 1981) but acid tuff is not otherwise known from this part of the Dalradian. Cross-cutting albitic rock and albitite were formed by replacement of footwall tourmalinite, ore and hanging-wall sediment at the Sullivan exhalative deposit, and are demonstrably hydrothermal (Hamilton et al 1983).…”

Section: Ben Challum Horizonmentioning

confidence: 96%

Stratabound mineralisation in Dalradian rocks near Tyndrum, Perthshire

Fortey

Smith

1986

SJG

View full text Add to dashboard Cite

SYNOPSISTwo horizons of low-grade stratabound sulphide mineralisation occur east of Tyndrum in the Ben Challum Quartzite, a newly recognised formation in the Argyll Group (Middle Dalradian). The lower horizon exceeds 9 km along strike and averages 1250 ppm Zn and 340 ppm Cu over an 80 m intersection. The upper extends for 4 km and locally contains up to 3-6% Zn over 1 m. Both comprise stratiform pyrite with minor pyrrhotite, sphalerite and chalcopyrite, in quartzite with possible meta-chert and subordinate schists, and contain manganeseenriched garnet. Sphalerite and galena in the upper horizon are associated with microcrystalline quartz and siliceous breccia interpreted as relict hydrothermal rocks. The Ben Challum Quartzite is in part highly albitic and includes bands of hornblende-schist with tholeiitic composition, some of which probably formed as basic tuff or volcanic sediment. The basal part of the overlying Ben Lui Schist includes sediment carrying talc, magnesite, chromite and Ni-sulphides which probably derived from altered ultramafic rocks. The Z n -C u -P b mineralisation is considered to be of the sedimentary-exhalative type, deposition occurring during a regime of fault-bounded subsidence prior to the turbiditic sedimentation of the Ben Lui Schist. INTRODUCTION A zone of stratiform, weakly cupriferous, pyritic mineralisation near the top of the Ben Lawers Schist has been shown to have considerable lateral persistence despite significant changes in lithofacies (Smith 1977;Smith et al. 1978). In the AUt Auchtertyre 2-5 k m east of T y n d r u m , Smith et al. (1977a) recorded a zone of pyritic mineralisation carrying about 0 -1 % C u and 0-4% Z n in quartzite which, on existing evidence, was assumed to be part of the Ben Lawers Schist. Copper drainage anomalies led subsequently to the discovery of stratabound sphalerite and galena on the north side of Ben Challum 5 k m N E of Allt Auchtertyre at a similar lithostratigraphic level. It is the intention of this paper to show that three discrete horizons of stratabound sulphide mineralisation are present in this area and that the quartzite has a far greater outcrop than shown on 1" Geological Sheet 46. It is n o w regarded as a separate formation, the Ben Challum Quartzite (Smith et al. 1981;, which by virtue of its position in the succession between the Ben Lawers and Ben Lui Schists is the lateral equivalent of the Sron Bheag Schist (Elles 1926) or Scott.

show abstract

The origin of the albite-rich rocks enclosing the cobaltian pyrite deposit at Thackaringa, N.S.W., Australia

Cited by 43 publications

References 19 publications

Piemontite‐bearing rocks from the Olary District, South Australia

Piemontite‐bearing rocks from the Olary District, South Australia

Regional oxygen isotope zonation at Broken Hill, New South Wales, Australia; large-scale fluid flow and implications for Pb-Zn-Ag mineralization

Stratabound mineralisation in Dalradian rocks near Tyndrum, Perthshire

Contact Info

Product

Resources

About