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Palaeocene faulting...
Palaeocene faulting in SE Sweden from U-Pb dating of slickenfibre calcite
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- Goodfellow, Bradley W. (författare)
- Stockholm University,Lunds universitet,Stockholms universitet,Institutionen för geologiska vetenskaper,Lund University, Sweden,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science
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- Viola, Giulio (författare)
- University of Bologna
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- Bingen, Bernard (författare)
- Geological Survey of Norway
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- Nuriel, Perach (författare)
- University of California, Santa Barbara,Geological Survey of Israel
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- Kylander-Clark, Andrew R. C. (författare)
- University of California, Santa Barbara
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(creator_code:org_t)
- 2017-08-22
- 2017
- Engelska.
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Ingår i: Terra Nova. - : Wiley. - 0954-4879 .- 1365-3121. ; 29:5, s. 321-328
- Relaterad länk:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Estimating the timing of faulting is crucial to modelling tectonics, palaeoseismicity, landscape evolution and fault mechanics. Four slickenfibre calcite samples from a conjugate strike-slip fault set in a platformal limestone, SE Sweden, were dated using U-Pb. Three of the samples yielded an average age of 64.8 +/- 6.5Ma, while the fourth yielded a marginally younger age of 54.7 +/- 5.5Ma. Precipitation of the fibres is interpreted as syn-deformational. Age uncertainty and dispersion reflect incorporation of common Pb and tiny host-rock components into the dated calcite and/or possible fault reactivation through ca. 55Ma. We infer from crystal characteristics, stable isotopes (O-18 and C-13) and rare-earth elements that fibres formed in an environment rich in deep-seated fluids, at temperatures of 40-200 degrees C, with shear stresses exceeding 10 MPa and at a maximum burial depth of c. 4km. This Palaeocene faulting may reflect far-field stresses from shortening in the Alps.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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