ORCID Profile
0000-0001-9726-0885
Current Organisation
Universiteit Utrecht
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Publisher: American Association for the Advancement of Science (AAAS)
Date: 03-02-2017
Abstract: Deep crustal earthquakes cause fragmentation of wall rocks.
Publisher: Springer Science and Business Media LLC
Date: 14-08-2017
DOI: 10.1038/NGEO3009
Publisher: Wiley
Date: 14-07-2012
Publisher: MDPI AG
Date: 10-10-2016
DOI: 10.3390/MIN6040104
Publisher: American Chemical Society (ACS)
Date: 07-07-2014
DOI: 10.1021/CG500495A
Publisher: Elsevier BV
Date: 04-2022
Publisher: Mineralogical Society of America
Date: 20-09-2011
DOI: 10.2138/AM.2011.3779
Publisher: Elsevier BV
Date: 09-2014
Publisher: Proceedings of the National Academy of Sciences
Date: 10-04-2017
Abstract: We document organic matter encapsulated in rock clasts from a oceanic serpentinite mud volcano above the Izu–Bonin–Mariana subduction zone (Pacific Ocean). Although we cannot pinpoint the exact origin of the organic matter, chemical analysis of the constituents resembles molecular signatures that could be produced by microbial life deep within or below the mud volcano. Considering the known temperature limit for life, 122 °C, and the subduction zone forearc geotherm where such mud volcanoes are located, we estimate that life could exist as deep as ∼10,000 m below the seafloor. This is considerably deeper than other active serpentinizing regions such as midocean ridges and could have provided sheltered ecosystems for life to survive the more violent phases of Earth’s history.
Publisher: American Geophysical Union (AGU)
Date: 08-2023
DOI: 10.1029/2023JB026809
Abstract: Earthquake‐induced fracturing of the dry and strong lower crust can transiently increase permeability for fluids to flow and trigger metamorphic and rheological transformations. However, little is known about the porosity that facilitates these transformations. We analyzed microstructures that have recorded the mechanisms generating porosity in the lower crust from a pristine pseudotachylyte (solidified earthquake‐derived frictional melt) and a mylonitized pseudotachylyte from Lofoten, Norway to understand the evolution of fluid pathways from the coseismic to the post‐ and interseismic stages of the earthquake cycle. Porosity is dispersed and poorly interconnected within the pseudotachylyte vein (0.14 vol%), with a noticeably increased amount along garnet grain boundaries (0.25–0.41 vol%). This porosity formed due to a net negative volume change at the grain boundary when garnet overgrows the pseudotachylyte matrix. Efficient healing of the damage zone by fluid‐assisted growth of feldspar neoblasts resulted in the preservation of only a few but relatively large interconnected pores along coseismic fractures (0.03 vol% porosity). In contrast, porosity in the mylonitized pseudotachylyte is dramatically reduced (0.02 vol% overall), because of the efficient precipitation of phases ( hibole, biotite and feldspars) into transient pores during grain‐size sensitive creep. Porosity reduction on the order of % may be a contributing factor in shear zone hardening, potentially leading to the development of new pseudotachylytes overprinting the mylonites. Our results show that earthquake‐induced rheological weakening of the lower crust is intermittent and occurs when a fluid can infiltrate a transiently permeable shear zone, thereby facilitating diffusive mass transfer and creep.
Publisher: American Chemical Society (ACS)
Date: 27-07-2010
DOI: 10.1021/ES9038193
Abstract: Large-scale olivine carbonation has been proposed as a potential method for sequestering CO(2) emissions. For in situ carbonation techniques, understanding the relationship between the formation of carbonate and other phases is important to predict the impact of possible passivating layers on the reaction. Therefore, we have conducted reactions of olivine with carbonated saline solutions in unstirred batch reactors. Altering the reaction conditions changed the Mg-carbonate morphology. We propose that this corresponded to changes in the ability of the system to precipitate hydromagnesite or magnesite. During high-temperature reactions (200 degrees C), an amorphous silica-enriched phase was precipitated that was transformed to lizardite as the reaction progressed. Hematite was also precipitated in the initial stages of these reactions but dissolved as the reaction proceeded. Comparison of the experimental observations with reaction models indicates that the reactions are governed by the interfacial fluid composition. The presence of a new Mg-silicate phase and the formation of secondary products at the olivine surface are likely to limit the extent of olivine to carbonate conversion.
Publisher: Oxford University Press (OUP)
Date: 05-2009
Publisher: American Geophysical Union (AGU)
Date: 06-2020
DOI: 10.1029/2019JB019060
Location: No location found
No related grants have been discovered for Oliver Plümper.