Isotopic and geochemical studies on crustal effects in the genesis of the woodlawn Pb-Zn-Cu deposit

Gulson, Brian L.

doi:10.1007/bf00371062

Cited by 16 publications

(7 citation statements)

References 46 publications

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“…This `line' is defined at one extremity by the zircons from the volcanics, by acid leach/ rock/residue and sulphide data of the underly ing Ordovician black shales, by sulphides from Silurian black shales, and at the other extremity by the ore lead. The significance of these results is discussed elsewhere (GULSON, 1977).…”

Section: Volcanicsmentioning

confidence: 81%

“…For comparison, average data for the whole rocks and their inherent sulphides are also given; these and other rock data are to be published elsewhere (GULSON, 1977) . Concentration data are not accurate because of difficulties in establishing precise weights and incomplete extraction of the acid leach from the residue fraction.…”

Section: Resultsmentioning

confidence: 99%

“…whole rock lead isotope study (GULSON, 1977) of the Woodlawn volcanogenic Cu-Pb-Zn deposit Lead isotope investigations in mineralized (southeast New South Wales, Australia) which areas have been used to suggest a genetic rela suggested that (1) rocks containing the higher tionship between the ore and possible source lead contents (> 20ppm) were closer to minerali rocks. In these studies, the ore lead and whole zation; (2) the initial lead isotopic compositions rock lead data usually define linear arrays on of sulphides from the ore horizon and sulphides 207pb/2o4pb and 208Pb/204Pb vs .…”

Section: Introductionmentioning

confidence: 99%

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Lead isotope results of acid leaching experiments on acid volcanics and black shales in an ore environment.

Gulson

1977

Geochem. J.

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In the volcanogenic Woodlawn Cu-Pb-Zn deposit, where pyrite is the dominant sulphide phase in the ore and a ubiquitous mineral in the host volcanics and shales, leaching experiments using HN03-HC1 to overcome the ore/rock lead dominance, resulted in highly complex lead isotopic data, dependent mainly on the original lead concentration in the rock. For samples with higher (> 5 ppm) lead concentrations, the acid leaches are less radiogenic than the rocks or residues whereas for samples with < 5ppm lead, the acid leaches are more radiogenic than the rocks or residues. In those samples with > 15 ppm lead, the data arrays. are those expected for a dominance of ore/rock lead. In all except the very high lead samples (> 100ppm), lead is derived from sources other than sulphides. Furthermore, in only the highest lead sample is the acid leach isotopic value compatible with that of the ore lead. As found in previous leaching investigations, the dominant component of lead and uranium is extracted in the acid leach.

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Section: Volcanicsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lead isotope results of acid leaching experiments on acid volcanics and black shales in an ore environment.

Gulson

1977

Geochem. J.

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“…Carr et al, 1995;Glen, 1995). Gulson (1977) reported a whole-rock U-Pb age of 413 Ϯ 6 Ma for the host rock of the Woodlawn deposit, the most studied large massive sulfide deposit in the Lachlan Fold Belt. Stratigraphic compilation of clastic and volcanic basinfill deposits by Glen (1995, Fig.…”

Section: Fig 12 Distribution Of Tectonic Elements and Majormentioning

confidence: 99%

Sedimentary Crust and Metallogeny of Granitoid Affinity: Implications from the Geotectonic Histories of the Circum‐Japan Sea Region, Central Andes and Southeastern Australia

Sato

2012

Resource Geology

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Metallogeny of granitoid affinity was reviewed from the aspect of geotectonic history of the continental crust, particularly of the genesis of sedimentary crust involved in magmatism. The redox state of granitoids and related mineralization shows a remarkable contrast between the east and west sides of the Pacific Rim, but if examined closely, the reduced-type and oxidized-type granitoid provinces are juxtaposed in three regions: the circum-Japan Sea region, the central Andes, and the Lachlan Fold Belt in southeastern Australia. Comparative study of these regions revealed that the reduced-type magmatism associated with Sn mineralization generated in thick sedimentary crust which formed in three geotectonic environments: (i) accretionary terrane along a subduction zone (e.g. Jurassic East Asia), (ii) continental rift (e.g. Early Paleozoic Andes), and (iii) mega-fan (e.g. Early Paleozoic southeastern Australia). A collisional orogen can provide large amounts of clastic sediment to these environments. The age gap between the magmatism and sedimentation varies depending on the tectonic evolution of individual regions. Thin sedimentary crust may not play an essential role for the reduced-type magmatism. The oxidized-type magmatism associated with porphyry Cu and other mineralization generated in the crust which was initially carbon-free igneous crust or modified from sedimentary crust by magmatism. Subduction-related basaltic magmas are relatively oxidized, and may enhance fO 2 conditions of granitoid activity. Repeated magmatism in a monotonous convergent margin may be favorable for porphyry Cu mineralization as exemplified in the eastern Pacific Rim.

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“…A whole rock U-Pb, Rb-Sr and major and trace element and U-Pb zircon study of volcanics distant (> 2 km) from the ore body has been published elsewhere (Gulson, 1977a).…”

Section: Introductionmentioning

confidence: 99%

A lead‐isotope study of the Pb‐Zn‐Cu deposit at Woodlawn, New South Wales

Gulson

1979

Journal of the Geological Society of Australia

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Isotopic and geochemical studies on crustal effects in the genesis of the woodlawn Pb-Zn-Cu deposit

Cited by 16 publications

References 46 publications

Lead isotope results of acid leaching experiments on acid volcanics and black shales in an ore environment.

Lead isotope results of acid leaching experiments on acid volcanics and black shales in an ore environment.

Sedimentary Crust and Metallogeny of Granitoid Affinity: Implications from the Geotectonic Histories of the Circum‐Japan Sea Region, Central Andes and Southeastern Australia

A lead‐isotope study of the Pb‐Zn‐Cu deposit at Woodlawn, New South Wales

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