Skip Navigation

This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (12)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by DRURY, M. R.
Right arrow Articles by VLAAR, N. J.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Journal of Petrology Volume 42 Number 1 Pages 131-140 2001
© Oxford University Press 2001

Emplacement of Deep Upper-Mantle Rocks into Cratonic Lithosphere by Convection and Diapiric Upwelling

M. R. DRURY1,*, H. L. M. VAN ROERMUND1, D. A. CARSWELL2, J. H. DE SMET1, A. P. VAN DEN BERG1 and N. J. VLAAR1

1VENING MEINESZ RESEARCH SCHOOL OF GEODYNAMICS, FACULTY OF EARTH SCIENCES, UTRECHT UNIVERSITY, PO BOX 80.021, 3508 TA UTRECHT, NETHERLANDS
2ENVIRONMENTAL AND GEOLOGICAL SCIENCES, UNIVERSITY OF SHEFFIELD, DAINTON BUILDING, BROOKHILL, SHEFFIELD S3 7HF, UK

Rocks containing breakdown products of majoritic garnet, derived from the deep upper mantle, occur in kimberlite xenoliths and in orogenic peridotites from Otrøy in Norway. The Otrøy peridotites are banded harzburgites and dunites with similar compositions to mantle xenoliths from Precambrian cratons and Phanerozoic supra-subduction-zone peridotites. Pressure–temperature (P–T) paths deduced for the Otrøy peridotites and kimberlite xenoliths from South Africa are consistent with emplacement of deep mantle peridotites into cratonic lithosphere by asthenosphere diapirism. Numerical thermo-convection models provide insight into the possible P–T histories of deep upper-mantle rocks. In the models, material from the base of the convecting system is transported to depths of 60–100 km by convection and small (50–100 km) diapirs. Diapir intrusion induces small-scale convection in the low-viscosity deeper part of the thermochemically defined lithosphere. Small-scale convection in the craton root can produce complex P–T paths, complex recurrent melting histories and complex compositional structure in the craton. P–T paths derived from the numerical models for asthenosphere diapirism in a hot upper mantle are consistent with the sequence of sub-solidus P–T conditions deduced for the cratonic peridotites.

KEY WORDS: asthenosphere diapirs; cratonic lithosphere; deep upper mantle; majoritic garnet


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Journal of the Geological SocietyHome page
H. v. Roermund
Recent progress in Scandian ultrahigh-pressure metamorphism in the northernmost domain of the Western Gneiss Complex, SW Norway: continental subduction down to 180-200 km depth
Journal of the Geological Society, July 1, 2009; 166(4): 739 - 751.
[Abstract] [Full Text] [PDF]

Home page
 Geological Society of America Special PapersHome page
L. Geoffroy, C. Aubourg, J.-P. Callot, and J.-A. Barrat
Mechanisms of crustal growth in large igneous provinces: The north Atlantic province as a case study
Geological Society of America Special Papers, January 1, 2007; 430(0): 747 - 774.
[Abstract] [Full Text] [PDF]

Home page
 Eur J MineralHome page
D. A. CARSWELL and H. L. M. van ROERMUND
On multi-phase mineral inclusions associated with microdiamond formation in mantle-derived peridotite lens at Bardane on Fjortoft, west Norway
European Journal of Mineralogy, February 1, 2005; 17(1): 31 - 42.
[Abstract] [Full Text] [PDF]

Home page
 GeologyHome page
H. L.M. van Roermund, D. A. Carswell, M. R. Drury, and T. C. Heijboer
Microdiamonds in a megacrystic garnet websterite pod from Bardane on the island of Fjortoft, western Norway: Evidence for diamond formation in mantle rocks during deep continental subduction
Geology, November 1, 2002; 30(11): 959 - 962.
[Abstract] [Full Text] [PDF]

Home page
 J PetrologyHome page
H. L. M. VAN ROERMUND, M. R. DRURY, A. BARNHOORN, and A. DE RONDE
Relict Majoritic Garnet Microstructures from Ultra-Deep Orogenic Peridotites in Western Norway
J. Petrology, January 1, 2001; 42(1): 117 - 130.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.