Exploration and origin of stratigraphically controlled platinum-group element mineralization in crustal-sequence ultramafics, Shetland ophiolite complex

Hdl Handle:
http://hdl.handle.net/10149/98643
Title:
Exploration and origin of stratigraphically controlled platinum-group element mineralization in crustal-sequence ultramafics, Shetland ophiolite complex
Authors:
Lord, R. A. (Richard); Prichard, H. M. (Hazel)
Affiliation:
Sunderland University. School of the Environment.
Citation:
Lord, R. A. and Prichard, H. M. (1997) 'Exploration and origin of stratigraphically controlled platinum-group element mineralization in crustal-sequence ultramafics, Shetland ophiolite complex', Transactions of the Institutions of Mining and Metallurgy, Section B: Applied Earth Science, 106 (May-Aug), pp.B179-B193.
Publisher:
Maney Publishing
Journal:
Transactions of the Institutions of Mining and Metallurgy, Section B: Applied Earth Science
Issue Date:
May-1997
URI:
http://hdl.handle.net/10149/98643
Abstract:
The Shetland complex exemplifies a class of olivine-rich, platiniferous ophiolite complexes generated by unusually high degrees of hydrous melting in a supra-subduction zone setting. In this environment the crystallization of abundant olivine from unusually picritic magmas has produced an exceptionally thick sequence of crustal dunite cumulates. Significant Pt + Pd concentrations (1-4 ppm) occur where such sulphide-bearing dunites are spatially associated with podiform chromite concentrations. In the area north of Balta Sound the chromitites appear to lie in distinct stratigraphic zones. A detailed programme of lithogeochemical and soil-rock interface geochemical exploration was undertaken, which culminated in diamond drilling and the successful intersection of three stratiform horizons of sulphide-bearing dunites and associated precious-metal mineralization. Cryptic geochemical layering is described at scales from 200 m to less than 1 cm. The patterns suggest open-system fractionation and are explained in terms of igneous concentration processes analogous to those operating in intracratonic layered complexes. The implications for platinum-group element exploration in other ophiolite complexes are assessed.
Type:
Article
Language:
en
Keywords:
Shetland ophiolite complex; mineralization; platinum-group
ISSN:
0371-7453
Rights:
Author can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 12/05/2010]
Citation Count:
3 [Scopus, 12/05/2010]

Full metadata record

DC FieldValue Language
dc.contributor.authorLord, R. A. (Richard)en
dc.contributor.authorPrichard, H. M. (Hazel)en
dc.date.accessioned2010-05-12T14:39:54Z-
dc.date.available2010-05-12T14:39:54Z-
dc.date.issued1997-05-
dc.identifier.citationTransactions of the Institutions of Mining and Metallurgy, Section B: Applied Earth Science; 106(May-Aug):B179-B193en
dc.identifier.issn0371-7453-
dc.identifier.urihttp://hdl.handle.net/10149/98643-
dc.description.abstractThe Shetland complex exemplifies a class of olivine-rich, platiniferous ophiolite complexes generated by unusually high degrees of hydrous melting in a supra-subduction zone setting. In this environment the crystallization of abundant olivine from unusually picritic magmas has produced an exceptionally thick sequence of crustal dunite cumulates. Significant Pt + Pd concentrations (1-4 ppm) occur where such sulphide-bearing dunites are spatially associated with podiform chromite concentrations. In the area north of Balta Sound the chromitites appear to lie in distinct stratigraphic zones. A detailed programme of lithogeochemical and soil-rock interface geochemical exploration was undertaken, which culminated in diamond drilling and the successful intersection of three stratiform horizons of sulphide-bearing dunites and associated precious-metal mineralization. Cryptic geochemical layering is described at scales from 200 m to less than 1 cm. The patterns suggest open-system fractionation and are explained in terms of igneous concentration processes analogous to those operating in intracratonic layered complexes. The implications for platinum-group element exploration in other ophiolite complexes are assessed.en
dc.language.isoenen
dc.publisherManey Publishingen
dc.rightsAuthor can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 12/05/2010]en
dc.subjectShetland ophiolite complexen
dc.subjectmineralizationen
dc.subjectplatinum-groupen
dc.titleExploration and origin of stratigraphically controlled platinum-group element mineralization in crustal-sequence ultramafics, Shetland ophiolite complexen
dc.typeArticleen
dc.contributor.departmentSunderland University. School of the Environment.en
dc.identifier.journalTransactions of the Institutions of Mining and Metallurgy, Section B: Applied Earth Scienceen
ref.citationcount3 [Scopus, 12/05/2010]en
or.citation.harvardLord, R. A. and Prichard, H. M. (1997) 'Exploration and origin of stratigraphically controlled platinum-group element mineralization in crustal-sequence ultramafics, Shetland ophiolite complex', Transactions of the Institutions of Mining and Metallurgy, Section B: Applied Earth Science, 106 (May-Aug), pp.B179-B193.-
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