Quartz vein morphology and implications for formation depth and classification of Archaean gold-vein deposits
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A simplified scheme to categorise quartz vein morphology from gold deposits is based on the growth direction of quartz or pseudomorphed chalcedony in the veins. The categories are scale-independent and are: (1) face-control, (2) displacement-control, (3) parallel-control, (4) radiating, (5) non-directional control, (6) replacement, and (7) modified. Quartz vein textures do not indicate any particular type of mineralisation. For the depth continuum of Archaean lode-gold deposits of the Yilgarn Craton all seven categories of texture are variously present. However, crustal depth is a major control. Parallel and radiating textures are characteristic of gold deposits formed at the near surface; displacement and non-directional control are typical of deposits at midcrustal (greenschist and amphibolite) conditions; and face-control shows a range of conditions from the near surface to midcrustal. Replacement and modified textures embrace a wide variety of alteration and deformation conditions, and can occur in gold deposits at all crustal levels.
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DOI: 10.1016/0169-1368(93)90036-X
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<record><TEI><teiHeader><fileDesc><titleStmt><title>Quartz vein morphology and implications for formation depth and classification of Archaean gold-vein deposits</title><author><name sortKey="Vearncombe, J R" uniqKey="Vearncombe J">J.R. Vearncombe</name><affiliation wicri:level="1"><mods:affiliation>Key Centre for Teaching and Research in Strategic Mineral Deposits, Department of Geology, The University of Western Australia, Nedlands 6009, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Key Centre for Teaching and Research in Strategic Mineral Deposits, Department of Geology, The University of Western Australia, Nedlands 6009</wicri:regionArea><wicri:noRegion>Nedlands 6009</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="RBID">ISTEX:539FD3076E6684FB009031DDD7B8629B2E4D93AC</idno><date when="1993">1993</date><idno type="doi">10.1016/0169-1368(93)90036-X</idno><idno type="url">https://api.istex.fr/document/539FD3076E6684FB009031DDD7B8629B2E4D93AC/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002268</idno><idno type="wicri:Area/Istex/Curation">002268</idno><idno type="wicri:Area/Istex/Checkpoint">002830</idno><idno type="MainMerge">002830</idno><idno type="wicri:Area/Main/Merge">003325</idno></publicationStmt><seriesStmt><idno type="ISSN">0169-1368</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="eng">A simplified scheme to categorise quartz vein morphology from gold deposits is based on the growth direction of quartz or pseudomorphed chalcedony in the veins. The categories are scale-independent and are: (1) face-control, (2) displacement-control, (3) parallel-control, (4) radiating, (5) non-directional control, (6) replacement, and (7) modified. Quartz vein textures do not indicate any particular type of mineralisation. For the depth continuum of Archaean lode-gold deposits of the Yilgarn Craton all seven categories of texture are variously present. However, crustal depth is a major control. Parallel and radiating textures are characteristic of gold deposits formed at the near surface; displacement and non-directional control are typical of deposits at midcrustal (greenschist and amphibolite) conditions; and face-control shows a range of conditions from the near surface to midcrustal. Replacement and modified textures embrace a wide variety of alteration and deformation conditions, and can occur in gold deposits at all crustal levels. </div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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