Genesis of tourmalinites from Belgium: petrographical and chemical evidence

Fieremans, M.; Paepe, Paul De

doi:10.1180/minmag.1982.046.338.15

Cited by 10 publications

(10 citation statements)

References 7 publications

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“…ideal uvite and feruvite). The small dimensions of tourmaline crystals, together with their exclusive occurrence as subparallel veinlets, as well as their complex composition characterized by Fe, ot /Mg t ot ratio<l (Power 1968, Fieremans and De Paepe 1982, Taylor and Slack 1984, London and Manning 1995, Trumbull and Chaussidon 1999, suggest that tourmaline crystallized during a hydrothermal stage, in subsolidus conditions, as confirmed by Y A1 absence (London and Manning 1995) and by Al deficiency in Ζ site. The low degree of alkali-site vacancies (Trumbull and Chaussidon 1999) allows drawing similar inferences on the crystallization of Sithonia tourmaline.…”

Section: Mineral Chemistry Data and Discussionmentioning

confidence: 93%

An Unusual Tourmaline Composition From Sithonia Peninsula (Northern Greece)

et al. 2007

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Section: Mineral Chemistry Data and Discussionmentioning

confidence: 93%

An Unusual Tourmaline Composition From Sithonia Peninsula (Northern Greece)

et al. 2007

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“…Tourmalinites in granites and granitic pegmatites commonly have schorl or schorl-elbaite compositions (e.g. Henry and Guidotti 1985), while those resulting from the metamorphism or metasomatism of a pelitic rock typically are intermediate in composition between dravite and schorl (Fieremans and Paepe 1982;Henry and Guidotti 1985;Fortey and Cooper 1986;Slack et al 1993). …”

Section: Origin Of the Tourmalinitesmentioning

confidence: 98%

Tourmalinization related to Late Proterozoic-Early Palaeozoic lode gold mineralization in the Bin Yauri area, Nigeria

Garba

1996

Mineral. Deposita

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Abstract. Three types of tourmaline occurrence have been identified in the area of Bin Yauri, Nigeria, mesothermal lode-gold mineralization. These are: (1) stratabound tourmalinites in pelitic metasediments, (2) tourmaline in a hydrothermal alteration assemblage within hornfelsed wall rocks, (3) tourmaline in auriferous quartz and quartz-carbonate veins. Although the tourmaline occurrences are all within or close to the contact aureole of a granodiorite intrusion, geochemical characteristics of the tourmalines are broadly similar and reflect a common metasedimentary source. Two stages of tourmalinization are envisaged. The earlier (ca. 1100 Ma) involved syngenetic-diagenetic formation of tourmalinites, while the later (ca. 500 Ma) involved epigenetic (hydrothermal) tourmaline-gold mineralization, possibly derived by dehydration and devolatilization of metasedimentary sequences containing tourmaline-rich rocks or tourmalinites. Electron microprobe analyses indicate that the tourmalines are intermediate members of the schorl-dravite solid solution series. Plots involving FeO, MgO, and/or A1203 from these analyses are used to constrain the sources and processes of tourmalinization. Two metallogenic implications are derived from this study. One is that, although the tourmalinites are barren of gold and base metal mineralization, their occurrences nevertheless encourages exploration for syngenetic-exhalative massive sulphide deposits in the region. The other implication applies to the potential use of tourmaline in deciphering the physico-chemical conditions of gold-mineralizing fluids in the Bin Yauri area.Tourmaline and tourmaline-rich rocks are known in a variety of geologic settings but are most notable in granite-related metasomatic and vein-type tin-tungsten deposits, in clastic metasedimentary sequences, and in Present address: Department of Geology, Ahmadu Bello University, Samaru, Zaria, Nigeria stratabound base metal ore deposits (e.g. Ethier and Campbell 1977;Slack 1982;Williams and Kennan 1983;Slack et al. 1984;Taylor and Slack 1984;Henry and Guidotti 1985;Plimer 1988;Appleby and Williams 1988;Beaty et al. 1988;Slack and Coad 1989;Bandyopadhyay et al. 1993).The relationships between tourmaline-rich rocks and metamorphic gold deposits have been documented in many metallogenic provinces, such as in the Precambrian of Ethiopia, Brazil, Mali, and Australia (Augustithis 1967; Fleischer and Routhier 1973;Dommanget et al. 1985;Plimer 1986), Caledonian rocks of southeastern Ireland (McArdle et al. 1989), and the Archaean Barberton sequence of South Africa (Byerly and Palmer 1991). Tourmaline is also a common hydrothermal gangue mineral in Archaean to Phanerozoic mesothermal and intrusion-related gold deposits (e.g. King 1988;Fuh 1990;Groves and Foster 1991;Nesbitt 1991).In northwestern Nigeria, tourmaline occurrences are widespread in Precambrian rocks, but more commonly are associated with Late Proterozoic metasedimentary belts (Russ 1957;McCurry 1971). Many areas of gold mineralization in Nigeria contain tourma...

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“…Finally, the stratigraphic assignment and the geological and geographical provenances can be pinpointed, based on a comparison with geological maps and on previous studies on these geomaterials (Bultynck & Dejonghe, 2001;Corteel et al, 2004;Fieremans & De Paepe, 1982). Within the context of this paper, we want to stress that the setup of ad hoc databases (e.g.…”

Section: Methodsmentioning

confidence: 99%

“…It is a chemically and mechanically resistant that occurs together with other heavy minerals such as zircon, rutile, apatite (automorphic crystals to well-rounded grains) and Fe-Ti minerals (ilmenites, leucoxenes, titanomagnetite…). The genesis of tourmaline (schorl-dravite series), in tourmalinite pebbles found in Belgian Lower Devonian conglomerates, was studied earlier by Fieremans & De Paepe (1982).…”

Section: Geographical and Geological Settingmentioning

confidence: 99%

The Macquenoise sandstone (Devonian – Lochkovian), a suitable raw material for ancient querns and millstones: quarries, properties, manufacture and distribution in France and Belgium

Picavet¹,

Reniere²,

Cnudde³

et al. 2018

Geol. Belg.

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ABSTRACT. For some years, a French-Belgian team of archaeologists and geologists is investigating the provenance of ancient quernstones and millstones. Their study revealed the frequent occurrence of particular coarse sandstones derived from Lower Devonian strata in the Ardenne region, known as either the "Arkose of Haybes" by geologists or the "Arkose of Macquenoise" by archaeologists. Material for Late Iron Age and Roman quern-stones and millstones was quarried from open pits located west of the border between France and Belgium, between the Belgian village of Macquenoise (Commune of Momignies, Province of Hainaut) and the French town of Hirson (Aisne Department, Hauts-de-France region). This paper describes the raw materials, presents the different types of grindstones produced through historical times and provides a detailed diffusion map of the millstones.

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Genesis of tourmalinites from Belgium: petrographical and chemical evidence

Cited by 10 publications

References 7 publications

An Unusual Tourmaline Composition From Sithonia Peninsula (Northern Greece)

An Unusual Tourmaline Composition From Sithonia Peninsula (Northern Greece)

Tourmalinization related to Late Proterozoic-Early Palaeozoic lode gold mineralization in the Bin Yauri area, Nigeria

The Macquenoise sandstone (Devonian – Lochkovian), a suitable raw material for ancient querns and millstones: quarries, properties, manufacture and distribution in France and Belgium

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