Multiple fluid migration events along the Moine Thrust Zone, Scotland

R D Blumstein, R D Elmore, M H Engel, J Parnell, M Baron

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A palaeomagnetic study of different lithologies exposed along the Moine Thrust Zone from Skye to Durness, Scotland, has identified three chemical remanent magnetizations (CRMs), a potential fourth CRM, and one possible primary component that all reside in hematite. Local and regional fold tests suggest that the CRMs are post-folding and post-thrusting. A contact test in the Torridon Group sandstone indicates that a Permian CRM is localized in and near the fault zone. The Permian CRM, which is also found in the Dumess Group, and associated alteration are direct evidence for post-orogenic activity, in which the thrusts vented excess heat during regional crustal extension. On the Isle of Skye, sandstones (Sleat, Torridon and Eriboll Groups) in and around the fault zone contain a Tertiary CRM interpreted to be related to hydrothermal fluids associated with Tertiary intrusions. A possible Mesozoic CRM is also present but it could represent the vector addition of the Permian and Tertiary CRMs. A Devonian CRM is interpreted to be related to hydrothermal fluids associated with Devonian volcanic rocks or to fluids triggered by late stages of the Caledonian orogeny. Geochemical and petrographical studies provide supporting evidence for multiple fluid flow events along the Moine Thrust Zone. These results show that palaeomagnetism can be used to date multiple fluid migration events and that dormant fault zones can act as conduits for flow.

Original languageEnglish
Pages (from-to)1031-1045
Number of pages15
JournalJournal of the Geological Society
Volume162
Publication statusPublished - 2005

Keywords

  • Moine Thrust Zone
  • remagnetization
  • fluid migration events
  • OLD RED SANDSTONE
  • NW SCOTLAND
  • SEDIMENTARY-ROCKS
  • PALEOMAGNETISM
  • LAURENTIA
  • PROVENANCE
  • VOLCANICS
  • EXTENSION
  • BALTICA
  • ORIGIN

Cite this

Blumstein, R. D., Elmore, R. D., Engel, M. H., Parnell, J., & Baron, M. (2005). Multiple fluid migration events along the Moine Thrust Zone, Scotland. Journal of the Geological Society , 162, 1031-1045.

Multiple fluid migration events along the Moine Thrust Zone, Scotland. / Blumstein, R D ; Elmore, R D ; Engel, M H ; Parnell, J ; Baron, M .

In: Journal of the Geological Society , Vol. 162, 2005, p. 1031-1045.

Research output: Contribution to journalArticle

Blumstein, RD, Elmore, RD, Engel, MH, Parnell, J & Baron, M 2005, 'Multiple fluid migration events along the Moine Thrust Zone, Scotland' Journal of the Geological Society , vol. 162, pp. 1031-1045.
Blumstein, R D ; Elmore, R D ; Engel, M H ; Parnell, J ; Baron, M . / Multiple fluid migration events along the Moine Thrust Zone, Scotland. In: Journal of the Geological Society . 2005 ; Vol. 162. pp. 1031-1045.
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