Palaeocene faulting in SE Sweden from U–Pb dating of slickenfibre calcite
(2017) In Terra Nova: the European journal of geosciences 29(5). p.321-328- Abstract
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 ± 6.5 Ma, while the fourth yielded a marginally younger age of 54.7 ± 5.5 Ma. 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. 55 Ma. We infer from crystal characteristics, stable isotopes (δ18O and δ13C) and rare-earth elements... (More)
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 ± 6.5 Ma, while the fourth yielded a marginally younger age of 54.7 ± 5.5 Ma. 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. 55 Ma. We infer from crystal characteristics, stable isotopes (δ18O and δ13C) and rare-earth elements that fibres formed in an environment rich in deep-seated fluids, at temperatures of 40–200°C, with shear stresses exceeding 10 MPa and at a maximum burial depth of c. 4 km. This Palaeocene faulting may reflect far-field stresses from shortening in the Alps.
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- author
- Goodfellow, Bradley W. LU ; Viola, Giulio ; Bingen, Bernard ; Nuriel, Perach and Kylander-Clark, Andrew R.C.
- organization
- publishing date
- 2017-10-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Terra Nova: the European journal of geosciences
- volume
- 29
- issue
- 5
- pages
- 8 pages
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:85029601991
- wos:000411115800007
- ISSN
- 0954-4879
- DOI
- 10.1111/ter.12280
- language
- English
- LU publication?
- yes
- id
- f9492ec8-785c-422b-a2b9-d9906798fc35
- date added to LUP
- 2017-09-29 08:52:29
- date last changed
- 2025-01-07 21:31:40
@article{f9492ec8-785c-422b-a2b9-d9906798fc35, abstract = {{<p>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 ± 6.5 Ma, while the fourth yielded a marginally younger age of 54.7 ± 5.5 Ma. 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. 55 Ma. We infer from crystal characteristics, stable isotopes (δ<sup>18</sup>O and δ<sup>13</sup>C) and rare-earth elements that fibres formed in an environment rich in deep-seated fluids, at temperatures of 40–200°C, with shear stresses exceeding 10 MPa and at a maximum burial depth of c. 4 km. This Palaeocene faulting may reflect far-field stresses from shortening in the Alps.</p>}}, author = {{Goodfellow, Bradley W. and Viola, Giulio and Bingen, Bernard and Nuriel, Perach and Kylander-Clark, Andrew R.C.}}, issn = {{0954-4879}}, language = {{eng}}, month = {{10}}, number = {{5}}, pages = {{321--328}}, publisher = {{Wiley-Blackwell}}, series = {{Terra Nova: the European journal of geosciences}}, title = {{Palaeocene faulting in SE Sweden from U–Pb dating of slickenfibre calcite}}, url = {{http://dx.doi.org/10.1111/ter.12280}}, doi = {{10.1111/ter.12280}}, volume = {{29}}, year = {{2017}}, }