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Tellurium enrichment in Jurassic Coal, Brora, Scotland

Tellurium enrichment in Jurassic Coal, Brora, Scotland
Tellurium enrichment in Jurassic Coal, Brora, Scotland
Mid-Jurassic pyritic coals exposed at the village of Brora, northern Scotland, UK, contain a marked enrichment of tellurium (Te) relative to crustal mean, average world coal compositions and British Isles Carboniferous coals. The Te content of Brora coal pyrite is more than one order of magnitude higher than in sampled pyrite of Carboniferous coals. The Te enrichment coincides with selenium (Se) and mercury (Hg) enrichment in the rims of pyrite, and Se/Te is much lower than in pyrites of Carboniferous coals. Initial pyrite formation is attributed to early burial (syn-diagenesis), with incorporation of Te, Se, Hg and lead (Pb) during later pyrite formation. The source of Te may have been a local hydrothermal system which was responsible for alluvial gold (Au) in the region, with some Au in Brora headwaters occurring as tellurides. Anomalous Te is not ubiquitous in coal, but may occur locally, and is detectable by laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS).
0009-8558
1-13
Bullock, Liam
c6ffb9b0-0a54-4ab2-9edb-f97280e6ce2d
Parnell, John
b86302b0-b930-4b7c-9786-13abc612fef7
Perez, Magali
496b62b9-ca3a-4b78-aaf7-4d14627f5771
Feldmann, Joerg
301ee755-b3df-4b0e-9c5e-3ca0f7d1ccc5
Bullock, Liam
c6ffb9b0-0a54-4ab2-9edb-f97280e6ce2d
Parnell, John
b86302b0-b930-4b7c-9786-13abc612fef7
Perez, Magali
496b62b9-ca3a-4b78-aaf7-4d14627f5771
Feldmann, Joerg
301ee755-b3df-4b0e-9c5e-3ca0f7d1ccc5

Bullock, Liam, Parnell, John, Perez, Magali and Feldmann, Joerg (2017) Tellurium enrichment in Jurassic Coal, Brora, Scotland. Clay Minerals, 7 (12), 1-13. (doi:10.3390/min7120231).

Record type: Article

Abstract

Mid-Jurassic pyritic coals exposed at the village of Brora, northern Scotland, UK, contain a marked enrichment of tellurium (Te) relative to crustal mean, average world coal compositions and British Isles Carboniferous coals. The Te content of Brora coal pyrite is more than one order of magnitude higher than in sampled pyrite of Carboniferous coals. The Te enrichment coincides with selenium (Se) and mercury (Hg) enrichment in the rims of pyrite, and Se/Te is much lower than in pyrites of Carboniferous coals. Initial pyrite formation is attributed to early burial (syn-diagenesis), with incorporation of Te, Se, Hg and lead (Pb) during later pyrite formation. The source of Te may have been a local hydrothermal system which was responsible for alluvial gold (Au) in the region, with some Au in Brora headwaters occurring as tellurides. Anomalous Te is not ubiquitous in coal, but may occur locally, and is detectable by laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS).

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Accepted/In Press date: 21 November 2017
e-pub ahead of print date: 23 November 2017
Published date: 23 November 2017

Identifiers

Local EPrints ID: 421783
URI: https://eprints.soton.ac.uk/id/eprint/421783
ISSN: 0009-8558
PURE UUID: 796875be-ef56-48f4-9800-14cf73b24dc8

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Date deposited: 27 Jun 2018 16:30
Last modified: 18 Jul 2019 10:54

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