Systematic destruction of K-Feldspar in deeply buried rift and passive margin sandstones
dc.contributor.author
Wilkinson, Mark
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Milliken, Kitty
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dc.contributor.author
Haszeldine, Stuart
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dc.coverage.spatial
9
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dc.date.accessioned
2003-10-21T14:32:50Z
dc.date.available
2003-10-21T14:32:50Z
dc.date.issued
2001
dc.description.abstract
Systematic patterns of detrital K-feldspar decline with increasing burial depth are revealed during deep burial (2.5-4.5km) of sandstones in diverse sedimentary basins from three rift and two passive margin setings in the North Sea and USA gulf coast. K-Feldspar destruction is predominantly by dissolution, though in-situ alteration to albite also occurs. Dissolution can remove up to 15% solid volume of the rock by 4.5km, so that primary arkosic snadstones become diagenetic quartzarenites at depth, with increased secondary:primary porosity ratios. Deeply buried sandstones are not reliable records of depositional composition.
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184107 bytes
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application/pdf
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dc.identifier.citation
Journal of the Geological Society London, Vol. 158, 2001. pp. 675-683
dc.identifier.uri
http://hdl.handle.net/1842/163
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en
dc.publisher
Geological Society London
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dc.subject
felspar
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dc.subject
diagenesis
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dc.subject
sandstone
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dc.subject
secondary porosity
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dc.subject
compaction
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dc.title
Systematic destruction of K-Feldspar in deeply buried rift and passive margin sandstones
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dc.type
Article
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