miun.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Post-breakup burial and exhumation of passive continental margins: Seven propositions to inform geodynamic models
Geotrack International Pty Ltd, West Brunswick, Victoria, Australia.
Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark.
Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark.
Mid Sweden University, Faculty of Human Sciences, Department of Tourism Studies and Geography. Geovisiona AB, Järfälla.ORCID iD: 0000-0003-0547-0565
Show others and affiliations
2017 (English)In: Gondwana Research, ISSN 1342-937X, E-ISSN 1878-0571Article in journal (Refereed) Epub ahead of print
Abstract [en]

Despite many years of study, the processes involved in the post-breakup development of passive margins remain poorly understood. Integration of apatite fission track analysis (AFTA) and stratigraphic landscape analysis (SLA) at a number of margins has provided new insights into the development of elevated passive continental margins (EPCMs). In particular, by integrating evidence from the preserved rock record and landscape with information on the deposition and erosional removal of rock units which are no longer present ("missing section") these studies have highlighted the importance of episodic positive and negative vertical km-scale crustal movements. Based on these studies we present seven propositions regarding the formation of EPCMs and the nature of the controlling processes, viz:. 1:EPCMs are not the inevitable consequence of rifting and breakup2:Elevated topography at present-day EPCMs developed long after breakup3:Similar EPCM landscapes at different margins suggest similar controlling processes4:EPCMs have undergone episodic km-scale burial and exhumation rather than slow monotonic denudation, both before rifting and after breakup5:Post-breakup km-scale exhumation at continental margins is not restricted to presently elevated onshore regions6:Post-breakup km-scale burial and exhumation have affected presently low lying margins as well as EPCMs7:Exhumation events show a broad level of synchroneity over continents and across oceans and correlate with plate boundary events and changes in plate motions. These propositions imply that positive and negative vertical motions at passive margins are controlled by plate-scale processes. Another key conclusion is that present-day elevation alone provides no clue to the earlier history of a margin.Many of the key aspects of these propositions are absent from current geodynamic models of passive margin development. Understanding the processes that control vertical movements at passive continental margins requires development of realistic geodynamic models that honour these propositions.

Place, publisher, year, edition, pages
2017.
Keyword [en]
AFTA, EPCM, Exhumation, Geodynamic modelling, Passive margins, SLA, Stratigraphic gaps
National Category
Other Social Sciences not elsewhere specified
Identifiers
URN: urn:nbn:se:miun:diva-31107DOI: 10.1016/j.gr.2017.03.007OAI: oai:DiVA.org:miun-31107DiVA: diva2:1118993
Note

Available online 22 March 2017

Available from: 2017-07-03 Created: 2017-07-03 Last updated: 2017-07-03Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Bonow, Johan M.
By organisation
Department of Tourism Studies and Geography
In the same journal
Gondwana Research
Other Social Sciences not elsewhere specified

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 1 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf