| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Journal of Petrology Volume 42 Number 9 Pages 1773-1779 2001
© Oxford University Press 2001
Comment on ‘New Constraints on the P–T Evolution of the Alpe Arami Garnet Peridotite Body (Central Alps, Switzerland)’ by Paquin & Altherr (2001)
1DIPARTIMENTO DI MINERALOGIA E PETROLOGIA, UNIVERSITÀ DI PADOVA, C.SO GARIBALDI 37, 35137 PADOVA, ITALY
2INSTITUT FÜR MINERALOGIE UND PETROGRAPHIE, ETH ZENTRUM, SONNEGGSTRASSE 5, 8092 ZÜRICH, SWITZERLAND
Received February 26, 2001; Revised typescript accepted May 18, 2001
 |
INTRODUCTION |
|---|
The ‘Alpe Arami controversy’ seems destined not to to end as more and more new analytical data become available. Recently, Paquin & Altherr (2001; hereafter P&A)
presented an excellent set of major- and trace-element zoning profiles in garnets and in various generations of pyroxenes from the Alpe Arami peridotite body. The results led the authors to conclude that the peridotite experienced peak metamorphic conditions of 1180°C and 5·9 GPa. These values are in fairly good agreement with the high P–T estimates of Brenker & Brey (1997), but are at variance with the more recent estimates of Nimis & Trommsdorff (2001; hereafter N&T) of 840°C and 3·2 GPa. Although the thermobarometric estimates of P&A are much lower than postulated by Dobrzhinetskaya et al. (1996) and Green et al. (1997), P&A still invoke an ultra-high-pressure Alpine (35–43 Ma) metamorphism for Alpe Arami which does not fit the prograde, high-pressure Alpine |
PAQUIN AND ALTHERR’S RESULTS |
|---|
|
COMMENTS |
|---|
Ca partitioning between Opx and Cpx
Al in Opx and Cr in Cpx
Al zoning in pyroxenes
The high-T stage
Opx–Cpx trace element equilibria
|
CONCLUSIONS |
|---|
|
ACKNOWLEDGEMENTS |
|---|
|
FOOTNOTES |
|---|
|
REFERENCES |
|---|
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  K. Naemura, T. Hirajima, and M. Svojtka The Pressure-Temperature Path and the Origin of Phlogopite in Spinel-Garnet Peridotites from the Blansky Les Massif of the Moldanubian Zone, Czech Republic J. Petrology, October 1, 2009; 50(10): 1795 - 1827. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. Bocchio, L. De Capitani, and L. Ottolini NEW CHEMICAL DATA ON THE CLINOPYROXENE-GARNET PAIR IN THE ALPE ARAMI ECLOGITE, CENTRAL ALPS, SWITZERLAND Can Mineral, August 1, 2004; 42(4): 1205 - 1219. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. OZAWA Thermal History of the Horoman Peridotite Complex: A Record of Thermal Perturbation in the Lithospheric Mantle J. Petrology, February 1, 2004; 45(2): 253 - 273. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. N. Bozhilov, K. N. Bozhilov, H. W. Green II, and L. F. Dobrzhinetskaya Quantitative 3D measurement of ilmenite abundance in Alpe Arami olivine by confocal microscopy: Confirmation of high-pressure origin American Mineralogist, April 1, 2003; 88(4): 596 - 603. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. PAQUIN and R. ALTHERR 'New Constraints on the P-T Evolution of the Alpe Arami Garnet Peridotite Body (Central Alps, Switzerland)': Reply to Comment by Nimis & Trommsdorff (2001) J. Petrology, September 1, 2001; 42(9): 1781 - 1787. [Full Text] [PDF]
|
|