Unique trace element geochemistry of pyrometamorphic apatite-supergroup minerals : a case study of fluorellestadite from burnt coal (Poland) and shale (France) post-mining waste heaps, with emphasis on boron, germanium, aluminium and titanium

• Autorzy: Kruszewski Łukasz Sewweryn , Sláma Jiří , Deput Ewa

Identyfikatory

DOI

10.7306/gq.1677

• Języki publikacji: EN

Abstrakty

EN

Apatite-type structure is known for its flexibility towards accommodating numerous ions of different crystallographic affinities. Two samples of fluorellestadite from two pyrometamorphic rocks (slags) from burned waste heaps (BWH) from France (LdS) and Poland (RDT) were studied in terms of their trace element composition using Laser Ablation Inductively Coupled Plasma Mass Spectrometry. Boron shows an evident, persistent enrichment in both the samples, with average/maximum levels of 497/1040 and 49/106 ppm, respectively. So is true for magnesium (884/16766 and 404/6251 ppm, i.e., respectively) and sodium (512/697 and 249/370 ppm, respectively). Germanium is clearly enriched in the first sample (29/40 ppm) and, to a lesser degree, in the second one (34 ppm on average). The LdS sample is also clearly enriched in Al (888/1238 ppm), K (385/697 ppm), Ti (515/943 ppm), V (172/347 ppm), and Cu (16/1369 ppm). The RDT sample is also rich in As (105/120 ppm) and Sr (1072/6592 ppm). An interesting feature of both samples concerns their REE pattern: Nd is the dominant element of the group, with the respective Nd/ΣLREE and Nd/(Ce+La) values of 0.43 and 0.90; and 0.37 and 0.66. In order from highest to lower average concentrations, aluminium, magnesium, titanium, boron, potassium, and germanium may be essential substituents in the BWH apatites.

Słowa kluczowe

EN

apatite supergroup; non-nominal ion substitution; boron; germanium; titanium; tetrahedra

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Geological Quarterly
• Rocznik: 2023
• Tom: Vol. 67, No. 1
• Strony: art. no. 7
• Opis fizyczny: Bibliogr. 88 poz., fot., rys., tab., wykr.

Twórcy

autor

Kruszewski Łukasz Sewweryn

• Institute of Geological Sciences, Polish Academy of Sciences (IGS PAS), Twarda 51/55, 00-818 Warszawa, Poland

• https://orcid.org/0000-0001-6332-9944

autor

Sláma Jiří

• Department of Geological Processes, Institute of Geology of the Czech Academy of Sciences, Rozvojová 269, 165 00 Praha 6 – Lysolaje, Czech Republic

• https://orcid.org/0000-0002-1386-4196

autor

Deput Ewa

• Institute of Geological Sciences, Polish Academy of Sciences (IGS PAS), Twarda 51/55, 00-818 Warszawa, Poland

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