Methane in sulphides from gold-bearing deposits, Britain and Ireland

John Parnell (Corresponding Author), Sam Spinks, Nigel Blamey

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The direct measurement of gases trapped in sulphide minerals shows that samples from gold-bearing deposits in Britain and Ireland are anomalously rich in methane. Chalcopyrite samples in deposits of Palaeozoic age sited in Neoproterozoic basement (Caledonides greenschist), Munster Basin (Variscides greenschist) and the Carboniferous cover (diagenetic) were compared using mass spectrometry of cold-crushed gases. All host sequences contain sources of organic matter. The content of non-aqueous gas is greater in both sets of greenschist-hosted deposits than in the diagenetic-hosted deposits. However, chalcopyrite accompanying gold in the Neoproterozoic is methane-rich, but in the low-gold Munster Basin it is methane-poor. These gas data from opaque minerals complement fluid inclusion data from gangue minerals, and add support to models for the involvement of organic species in orogenic gold mineralization.
Original languageEnglish
Pages (from-to)89-95
Number of pages7
JournalApplied Earth Science
Volume128
Issue number3
Early online date11 Mar 2019
DOIs
Publication statusPublished - 2019

Fingerprint

Bearings (structural)
Methane
Sulfides
Gold
greenschist
Deposits
gold
Gases
methane
sulfide
chalcopyrite
gas
Minerals
mineral
Sulfide minerals
gangue
basin
Biological materials
fluid inclusion
Mass spectrometry

Keywords

  • chalcopyrite
  • copper mineralisation
  • gold
  • Caledonides
  • cold crush gases
  • Britain
  • Ireland
  • Chalcopyrite

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

Cite this

Methane in sulphides from gold-bearing deposits, Britain and Ireland. / Parnell, John (Corresponding Author); Spinks, Sam; Blamey, Nigel.

In: Applied Earth Science, Vol. 128, No. 3, 2019, p. 89-95.

Research output: Contribution to journalArticle

Parnell, John ; Spinks, Sam ; Blamey, Nigel. / Methane in sulphides from gold-bearing deposits, Britain and Ireland. In: Applied Earth Science. 2019 ; Vol. 128, No. 3. pp. 89-95.
@article{6ecc9e07b4a249c3b7172034821502f1,
title = "Methane in sulphides from gold-bearing deposits, Britain and Ireland",
abstract = "The direct measurement of gases trapped in sulphide minerals shows that samples from gold-bearing deposits in Britain and Ireland are anomalously rich in methane. Chalcopyrite samples in deposits of Palaeozoic age sited in Neoproterozoic basement (Caledonides greenschist), Munster Basin (Variscides greenschist) and the Carboniferous cover (diagenetic) were compared using mass spectrometry of cold-crushed gases. All host sequences contain sources of organic matter. The content of non-aqueous gas is greater in both sets of greenschist-hosted deposits than in the diagenetic-hosted deposits. However, chalcopyrite accompanying gold in the Neoproterozoic is methane-rich, but in the low-gold Munster Basin it is methane-poor. These gas data from opaque minerals complement fluid inclusion data from gangue minerals, and add support to models for the involvement of organic species in orogenic gold mineralization.",
keywords = "chalcopyrite, copper mineralisation, gold, Caledonides, cold crush gases, Britain, Ireland, Chalcopyrite",
author = "John Parnell and Sam Spinks and Nigel Blamey",
note = "We are grateful to J. Armstrong and C. Rice for provision of samples. J. Johnston is thanked for skilled technical support.",
year = "2019",
doi = "10.1080/25726838.2019.1588517",
language = "English",
volume = "128",
pages = "89--95",
journal = "Applied Earth Science",
issn = "0371-7453",
publisher = "Maney Publishing",
number = "3",

}

TY - JOUR

T1 - Methane in sulphides from gold-bearing deposits, Britain and Ireland

AU - Parnell, John

AU - Spinks, Sam

AU - Blamey, Nigel

N1 - We are grateful to J. Armstrong and C. Rice for provision of samples. J. Johnston is thanked for skilled technical support.

PY - 2019

Y1 - 2019

N2 - The direct measurement of gases trapped in sulphide minerals shows that samples from gold-bearing deposits in Britain and Ireland are anomalously rich in methane. Chalcopyrite samples in deposits of Palaeozoic age sited in Neoproterozoic basement (Caledonides greenschist), Munster Basin (Variscides greenschist) and the Carboniferous cover (diagenetic) were compared using mass spectrometry of cold-crushed gases. All host sequences contain sources of organic matter. The content of non-aqueous gas is greater in both sets of greenschist-hosted deposits than in the diagenetic-hosted deposits. However, chalcopyrite accompanying gold in the Neoproterozoic is methane-rich, but in the low-gold Munster Basin it is methane-poor. These gas data from opaque minerals complement fluid inclusion data from gangue minerals, and add support to models for the involvement of organic species in orogenic gold mineralization.

AB - The direct measurement of gases trapped in sulphide minerals shows that samples from gold-bearing deposits in Britain and Ireland are anomalously rich in methane. Chalcopyrite samples in deposits of Palaeozoic age sited in Neoproterozoic basement (Caledonides greenschist), Munster Basin (Variscides greenschist) and the Carboniferous cover (diagenetic) were compared using mass spectrometry of cold-crushed gases. All host sequences contain sources of organic matter. The content of non-aqueous gas is greater in both sets of greenschist-hosted deposits than in the diagenetic-hosted deposits. However, chalcopyrite accompanying gold in the Neoproterozoic is methane-rich, but in the low-gold Munster Basin it is methane-poor. These gas data from opaque minerals complement fluid inclusion data from gangue minerals, and add support to models for the involvement of organic species in orogenic gold mineralization.

KW - chalcopyrite

KW - copper mineralisation

KW - gold

KW - Caledonides

KW - cold crush gases

KW - Britain

KW - Ireland

KW - Chalcopyrite

UR - http://www.mendeley.com/research/methane-sulphides-goldbearing-deposits-britain-ireland

UR - http://www.scopus.com/inward/record.url?scp=85070921907&partnerID=8YFLogxK

U2 - 10.1080/25726838.2019.1588517

DO - 10.1080/25726838.2019.1588517

M3 - Article

VL - 128

SP - 89

EP - 95

JO - Applied Earth Science

JF - Applied Earth Science

SN - 0371-7453

IS - 3

ER -