Tourmaline-rich Rocks Associated with the Submarine Hydrothermal Rosebery Zn-Pb-Cu-Ag-Au Deposit and Granites in Western Tasmania, Australia

Plimer, I. R.; Lees, T. C.

doi:10.1007/bf01164314

Cited by 19 publications

(5 citation statements)

References 19 publications

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“…Petrographic observations and chemical data show the complex zoning of tourmaline from the metarhyolite bodies. Color zoning seems to be mainly related to the Ti content, in agreement with previous authors, with dark brown areas characterized by the higher contents of this element (e.g., Plimer and Lees, 1988;Slack and Coad, 1989;Benvenuti et al, 1991). As shown in Figure 8, tourmalines from sample FVb7 have a chemical composition similar to those described by Benvenuti et al (1991) from the tourmalinite bodies of the Bottino mining district.…”

Section: Permian Magmatism and Ore Genesis In The Alpi Apuanesupporting

confidence: 89%

“…It is well-known that no specific compositional field can be established in the diagrams of Henry and Guidotti (1985) for tourmaline from tourmalinites, owing to their wide compositional range (e.g., Plimer and Lees, 1988;Slack, 1996;Torres-Ruiz et al, 2003). Indeed, tourmaline from the Fornovolasco metarhyolite falls in the compositional fields corresponding to clastic metasediments, Li-poor granitoids, and Fe 3+ -rich quartz-tourmaline rocks, in agreement with occurrences from other localities worldwide (e.g., tourmaline in tourmalinites from the Betic Cordillera, Spain -Torres- Ruiz et al, 2003).…”

Section: Permian Magmatism and Ore Genesis In The Alpi Apuanementioning

confidence: 99%

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Evidence of Permian magmatism in the Alpi Apuane metamorphic complex (Northern Apennines, Italy): New hints for the geological evolution of the basement of the Adria plate

Vezzoni

Biagioni

D’Orazio

et al. 2018

Lithos

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Section: Permian Magmatism and Ore Genesis In The Alpi Apuanesupporting

confidence: 89%

Section: Permian Magmatism and Ore Genesis In The Alpi Apuanementioning

confidence: 99%

Evidence of Permian magmatism in the Alpi Apuane metamorphic complex (Northern Apennines, Italy): New hints for the geological evolution of the basement of the Adria plate

Vezzoni

Biagioni

D’Orazio

et al. 2018

Lithos

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“…10). The formation of Mg-rich tourmaline in submarinehydrothermal systems is well documented (Plimer and Lees 1988;Slack and Coad 1989;Slack 1996;Jiang et al 1998). Thus, the Mg-rich tourmaline in the Changpo-Tongkeng deposit could be taken to suggest they formed in a similar setting (Jiang et al 1999).…”

Section: Origin and Evolution Of Hydrothermal Fluids In Changpo-tongkengmentioning

confidence: 95%

Chemical and boron isotopic compositions of tourmaline at the Dachang Sn-polymetallic ore district in South China: Constraints on the origin and evolution of hydrothermal fluids

et al. 2021

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The Dachang Sn-polymetallic ore district in South China is the second largest tin district in the world with a tin reserve of over one million tonnes. Zn-Cu skarn and stratiform, massive, and vein Sn-Pb-Zn ores are all present in this district. This has led to a debate as to whether the Sn orebodies were formed by Cretaceous magmatic-hydrothermal replacement or Devonian submarine exhalative-hydrothermal sedimentation. Here, we present a systematic investigation of the major, trace element, and boron isotopic compositions of different types of tourmaline in the Dachang ore district. Tourmaline disseminated in the Longxianggai granite and pegmatite veins belongs to the schorl series and has high contents of Li, Zn, and Ga. The δ 11 B value of primary magma of the Longxianggai granite is estimated to be about −13‰, close to the global average δ 11 B value (−11‰) for S-type granites. Tourmaline from quartz-tourmaline veins in the Longxianggai granite has similar chemical composition to the magmatic tourmaline and likely formed from hydrothermal fluids exsolved from the evolved granitic melt. The δ 11 B value of the initial hydrothermal fluids is also calculated to be about −13‰.Tourmalines from the skarn and sulfide ores in the Lamo deposit have higher Mg/(Mg+Fe) and lower Na/(Na+Ca) ratios and higher contents of Be, Ge, Sr, and Sn than magmatic tourmaline. These patterns likely reflect input of elements derived from the host Devonian limestone. The δ 11 B values of the hydrothermal fluidsre estimated to be between −13 and −10‰, suggesting evolved magmatic-hydrothermal fluids related to the Longxianggai granite. Tourmalines from the stratiform and vein ores in the Changpo-Tongkeng deposit are extremely Mg-rich and mostly belong to the dravite series. They have high contents of Sc, V, Cr, Sr, and Sn and show positive Eu anomalies. The δ 11 B values of these B-and Sn-rich fluids are estimated to be between −15 and −10‰, suggesting that the fluids also have a magmatic hydrothermal origin. These fluids are most likely derived from the same granitic magma source, but may have interacted with the Devonian volcanic rocks.

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“…These tourmalinites may be compared with Proterozoic tourmalinites from the Golden Dyke dome, northern Australia (Plimer 1986). Proterozoic tourmalinites in the Rocky Mountains of North America (Ethier and Campbell 1977;Slack 1993), tourmalinites in parts of the Paleozoic Appalachian-Calidonian orogen (Slack 1982;Slack et al 1984;Taylor and Slack 1984;McArdle et al 1989), tourmalinites in the Broken Hill, New South Wales (Barnes 1983;Plimer 1988;Slack et al 1993), tourmalinites related to Zn-Pb-Cu-Ag-Au deposits in western Tasmania (Plimer and Lees 1988), and tourmalinites associated with Pb-Zn-Ag mineralization in the Apuane Alps, Italy (Benvenuti et al 1989). Such tourmalinites are generally regarded as indicators of massive sulfide mineralization (Slack 1982).…”

Section: Origin Of the Bedded Tourmalinitesmentioning

confidence: 99%

Tourmalinite from northern Guangxi, China

Mao

1995

Mineral. Deposita

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Abstract. The extensive development of tourmalinite is a feature that distinguishes the northern Guangxi polymetallic tin province of China from similar metallogenic provinces elsewhere. Two types of tourmalinite occur in the province. The first type, in the lower part of the Early Proterozoic Sibao Group, is bedded, stratiform or lenticular tourmalinite that shows well-developed laminated, gel, and degelatinized structures. Its mineral assemblage is very simple and the grain size ranges from 2 to 8 gm. This tourmaline is relatively rich in Mg, with an Fe/(Fe + Mg) ratio of 0.25-0.50.The second type of tourmalinite occurs as lodes distributed in the exocontact zone of Late Proterozoic biotite-granite intrusions. Its mineral assemblage is relatively complex; the tourmaline is present as euhedral or subhedral crystals ranging from 0.1 to 3.5 ram, mostly from 0.5 to 1 ram. This tourmaline commonly exhibits a radiating, zoned structure with Fe/(Fe + Mg) ratios of 0.64-0.79. It is suggested that the bedded tourmalinite formed by exhalation in an Early Proterozoic spreading-ridge environment, whereas the vein tourmalinite formed in a plate-convergence setting genetically associated with emplacement of Late Proterozoic biotite granite. As the tourmalinites themselves are related to mineralized rocks and orebodies, their origin and the related boron cycle of the region reflect to some extent the formation and evolution of the associated polymetallic tin deposits of the region.

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Tourmaline-rich Rocks Associated with the Submarine Hydrothermal Rosebery Zn-Pb-Cu-Ag-Au Deposit and Granites in Western Tasmania, Australia

Cited by 19 publications

References 19 publications

Evidence of Permian magmatism in the Alpi Apuane metamorphic complex (Northern Apennines, Italy): New hints for the geological evolution of the basement of the Adria plate

Evidence of Permian magmatism in the Alpi Apuane metamorphic complex (Northern Apennines, Italy): New hints for the geological evolution of the basement of the Adria plate

Chemical and boron isotopic compositions of tourmaline at the Dachang Sn-polymetallic ore district in South China: Constraints on the origin and evolution of hydrothermal fluids

Tourmalinite from northern Guangxi, China

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