Micro- and nano-porosity of the active Alpine Fault zone, New Zealand
- Publikationstyp:
- Zeitschriftenaufsatz
- Metadaten:
-
- Autoren
- Martina Kirilova
- Virginia Toy
- Katrina Sauer
- Francois Renard
- Klaus Gessner
- Richard Wirth
- Xianghui Xiao
- Risa Matsumura
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000599525500003&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.5194/se-11-2425-2020
- eISSN
- 1869-9529
- Externe Identifier
- Clarivate Analytics Document Solution ID: PG1TO
- ISSN
- 1869-9510
- Ausgabe der Veröffentlichung
- 6
- Zeitschrift
- SOLID EARTH
- Paginierung
- 2425 - 2438
- Datum der Veröffentlichung
- 2020
- Status
- Published
- Titel
- Micro- and nano-porosity of the active Alpine Fault zone, New Zealand
- Sub types
- Article
- Ausgabe der Zeitschrift
- 11
Datenquelle: Web of Science (Lite)
- Andere Metadatenquellen:
-
- Abstract
- <jats:p>Abstract. Porosity reduction in rocks from a fault core can cause elevated pore fluid pressures and consequently influence the recurrence time of earthquakes. We investigated the porosity distribution in the New Zealand's Alpine Fault core in samples recovered during the first phase of the Deep Fault Drilling Project (DFDP-1B) by using two-dimensional nanoscale and three-dimensional microscale imaging. Synchrotron X-ray microtomography-derived analyses of open pore spaces show total microscale porosities in the range of 0.1 %–0.24 %. These pores have mainly non-spherical, elongated, flat shapes and show subtle bipolar orientation. Scanning and transmission electron microscopy reveal the samples' microstructural organization, where nanoscale pores ornament grain boundaries of the gouge material, especially clay minerals. Our data imply that (i) the porosity of the fault core is very small and not connected; (ii) the distribution of clay minerals controls the shape and orientation of the associated pores; (iii) porosity was reduced due to pressure solution processes; and (iv) mineral precipitation in fluid-filled pores can affect the mechanical behavior of the Alpine Fault by decreasing the already critically low total porosity of the fault core, causing elevated pore fluid pressures and/or introducing weak mineral phases, and thus lowering the overall fault frictional strength. We conclude that the current state of very low porosity in the Alpine Fault core is likely to play a key role in the initiation of the next fault rupture.</jats:p>
- Autoren
- Martina Kirilova
- Virginia Toy
- Katrina Sauer
- François Renard
- Klaus Gessner
- Richard Wirth
- Xianghui Xiao
- Risa Matsumura
- DOI
- 10.5194/se-11-2425-2020
- eISSN
- 1869-9529
- Ausgabe der Veröffentlichung
- 6
- Zeitschrift
- Solid Earth
- Sprache
- en
- Online publication date
- 2020
- Paginierung
- 2425 - 2438
- Status
- Published online
- Herausgeber
- Copernicus GmbH
- Herausgeber URL
- http://dx.doi.org/10.5194/se-11-2425-2020
- Datum der Datenerfassung
- 2022
- Titel
- Micro- and nano-porosity of the active Alpine Fault zone, New Zealand
- Ausgabe der Zeitschrift
- 11
Datenquelle: Crossref
- Author's licence
- CC-BY
- Autoren
- Kirilova Martina
- Virginia Toy
- Katrina Sauer
- François Renard
- Klaus Gessner
- Richard Wirth
- Xianghui Xiao
- Risa Matsumura
- Hosting institution
- Universitätsbibliothek Mainz
- Sammlungen
- JGU-Publikationen
- Resource version
- Published version
- DOI
- 10.5194/se-11-2425-2020
- Funding acknowledgements
- DFG, Open Access-Publizieren Universität Mainz / Universitätsmedizin Mainz
- File(s) embargoed
- false
- Open access
- true
- ISSN
- 1869-9529
- Ausgabe der Veröffentlichung
- 6
- Zeitschrift
- Solid earth
- Schlüsselwörter
- 550 Geowissenschaften
- 550 Earth sciences
- Sprache
- eng
- Open access status
- Open Access
- Paginierung
- 2425 - 2438
- Datum der Veröffentlichung
- 2020
- Public URL
- https://openscience.ub.uni-mainz.de/handle/20.500.12030/5609
- Herausgeber
- Copernicus Publ.
- Herausgeber URL
- https://doi.org/10.5194/se-11-2425-2020
- Datum der Datenerfassung
- 2021
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2021
- Zugang
- Public
- Titel
- Micro- and nano-porosity of the active Alpine Fault zone, New Zealand
- Ausgabe der Zeitschrift
- 11
Files
martina_kirilova-micro-_and_nan-20210128121057932.pdf
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