Could peridotite hydration reactions have provided a contributory driving force for Cenozoic uplift and accelerated subsidence along the margins of the North Atlantic and Labrador Sea?

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: onr:"swepub:oai:DiVA.org:su-19536" > Could peridotite hy...

1 of 1
Previous record
Next record
To hitlist

Details
MARC

Skelton, AlasdairStockholms universitet,Institutionen för geologi och geokemi,Geologi (author)

Could peridotite hydration reactions have provided a contributory driving force for Cenozoic uplift and accelerated subsidence along the margins of the North Atlantic and Labrador Sea?

Article/chapterEnglish2007

Publisher, publication year, extent ...

2007
printrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:su-19536
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-19536URI
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-19910URI

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

This study evaluates the hypothesis that peridotite hydration reactions (e.g. serpentinisation) at the landward termination of transform fracture zones provide a contributory driving force for coupled uplift and accelerated subsidence along the margins of the North Atlantic and Labrador Sea in the Cenozoic. This evaluation is partly based on the extent and rate of serpentinisation, calculated by Skelton et al. (2005) by using seismic velocity as a proxy for progress of the serpentinisation reactions. The hypothesis is supported by 1) spatial coincidence between most of the uplifted segments of the margin with the landward termination of transform fracture zones, 2) the theoretical capacity of serpentinisation to generate 102-103 m of uplift at a rate of mm.a-1 to cm.a-1 which is consistent with observations from the margin, and 3) the potential for landward material flow of a hydrated peridotite inclusion, providing a mechanism for sustaining uplift and its pairing with accelerated subsidence. Also, serpentinisation is more effective than other metamorphic reactions (e.g. granulite to amphibolite, eclogite to amphibolite) as a driving force for uplift. Shortfalls of this model are that 1) extensive peridotite hydration is unlikely at depths exceeding 10-20km and 2) the timing of uplift requires that pulses of extensive peridotite hydration occurred along inactive segments of transform fracture zones. We conclude that the volume expansion caused by peridotite hydration was probably insufficient to account for widespread uplift during the Cenozoic. However, we suggest that the following processes could occur at or near the landward terminations of transform fracture zones: 1) volume expansion caused by extensive peridotite hydration beneath thinned crust at or near the ocean-continent transition and 2) mechanical weakening caused by limited peridotite hydration beneath thicker continental crust. These processes may have important implications for models aimed at explaining Cenozoic uplift and accelerated subsidence.

Subject headings and genre

NATURVETENSKAP Geovetenskap och miljövetenskap Geologi hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geology hsv//eng
Petrology
North Atlantic
Uplift
Solid earth geology and petrology
Berggrundsgeologi och petrologi

Added entries (persons, corporate bodies, meetings, titles ...)

Jakobsson, MartinStockholms universitet,Institutionen för geologi och geokemi,Marin geovetenskap(Swepub:su)mjako (author)
Stockholms universitetInstitutionen för geologi och geokemi (creator_code:org_t)

Related titles

In:Norwegian Journal of Geology87, s. 241-248

Internet link

Find in a library

Norwegian Journal of Geology (Search for host publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Skelton, Alasdai ...; Jakobsson, Marti ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geology

Articles in the publication: Norwegian Journa ...

By the university: Stockholm University

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se