Journal of Petrology Advance Access originally published online on August 5, 2004
Journal of Petrology 2004 45(12):2507-2530; doi:10.1093/petrology/egh039
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Journal of Petrology 45(12) © Oxford University Press 2004; all rights reserved
Geodynamic Information in Peridotite Petrology
DEPARTMENT OF GEOLOGICAL SCIENCES, RUTGERS UNIVERSITY, NEW BRUNSWICK, NJ 08903, USA
Systematic differences are observed in the petrology and major element geochemistry of natural peridotite samples from the sea floor near oceanic ridges and subduction zones, the mantle section of ophiolites, massif peridotites, and xenoliths of cratonic mantle in kimberlite. Some of these differences reflect variable temperature and pressure conditions of melt extraction, and these have been calibrated by a parameterization of experimental data on fertile mantle peridotite. Abyssal peridotites are examples of cold residues produced at oceanic ridges. High-MgO peridotites from the Ronda massif are examples of hot residues produced in a plume. Most peridotites from subduction zones and ophiolites are too enriched in SiO2 and too depleted in Al2O3 to be residues, and were produced by meltrock reaction of a precursor protolith. Peridotite xenoliths from the Japan, Cascades and ChilePatagonian back-arcs are possible examples of arc precursors, and they have the characteristics of hot residues. Opx-rich cratonic mantle is similar to subduction zone peridotites, but there are important differences in FeOT. Opx-poor xenoliths of cratonic mantle were hot residues of primary magmas with 1620% MgO, and they may have formed in either ancient plumes or hot ridges. Cratonic mantle was not produced as a residue of Archean komatiites.
KEY WORDS: peridotite; residues; fractional melting; abyssal; cratonic mantle; subduction zone; ophiolite; potential temperature; plumes; hot ridges
* E-mail: Herzberg{at}rci.rutgers.edu
![]()
CiteULike
Connotea
Del.icio.us What's this?
This article has been cited by other articles:
![]() |
D.G. PEARSON and N. WITTIG Formation of Archaean continental lithosphere and its diamonds: the root of the problem Journal of the Geological Society, September 1, 2008; 165(5): 895 - 914. [Abstract] [Full Text] [PDF] |
||||
![]() |
Y. Dilek and A. Polat Suprasubduction zone ophiolites and Archean tectonics Geology, May 1, 2008; 36(5): 431 - 432. [Full Text] [PDF] |
||||
![]() |
I. Uysal, M. Kaliwoda, O. Karsli, M. Tarkian, M. B. Sadiklar, and C. J. Ottley COMPOSITIONAL VARIATIONS AS A RESULT OF PARTIAL MELTING AND MELT-PERIDOTITE INTERACTION IN AN UPPER MANTLE SECTION FROM THE ORTACA AREA, SOUTHWESTERN TURKEY Can Mineral, December 1, 2007; 45(6): 1471 - 1493. [Abstract] [Full Text] [PDF] |
||||
![]() |
S. Bernstein, P. B. Kelemen, and K. Hanghoj Consistent olivine Mg# in cratonic mantle reflects Archean mantle melting to the exhaustion of orthopyroxene Geology, May 1, 2007; 35(5): 459 - 462. [Abstract] [Full Text] [PDF] |
||||
![]() |
A. Polat, C. Herzberg, C. Munker, R. Rodgers, T. Kusky, J. Li, B. Fryer, and J. Delaney Geochemical and petrological evidence for a suprasubduction zone origin of Neoarchean (ca. 2.5 Ga) peridotites, central orogenic belt, North China craton GSA Bulletin, July 1, 2006; 118(7-8): 771 - 784. [Abstract] [Full Text] [PDF] |
||||



