Journal of Petrology Advance Access originally published online on October 26, 2005
Journal of Petrology 2006 47(2):329-353; doi:10.1093/petrology/egi077
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Zircon Crystal Morphology, Trace Element Signatures and Hf Isotope Composition as a Tool for Petrogenetic Modelling: Examples From Eastern Australian Granitoids
1 GEMOC ARC NATIONAL KEY CENTRE, DEPARTMENT OF EARTH AND PLANETARY SCIENCES, MACQUARIE UNIVERSITY, Sydney, NSW 2109, AUSTRALIA
2 CSIRO EXPLORATION AND MINING, NORTH RYDE, NSW 2113, AUSTRALIA
RECEIVED MAY 13, 2004; ACCEPTED SEPTEMBER 19, 2005
In situ laser ablation inductively coupled plasma mass spectrometry analysis of trace elements, U–Pb ages and Hf isotopic compositions of magmatic zircon from I- and S-type granitoids from the Lachlan Fold Belt (Berridale adamellite and Kosciusko tonalite) and New England Fold Belt (Dundee rhyodacite ignimbrite), Eastern Australia, is combined with detailed studies of crystal morphology to model petrogenetic processes. The presented examples demonstrate that changes in zircon morphology, within single grains and between populations, generally correlate with changes in trace element and Hf-isotope signatures, reflecting the mixing of magmas and changes in the composition of the magma through mingling processes and progressive crystallization. The zircon data show that the I-type Kosciusko tonalite was derived from a single source of crustal origin, whereas the S-type Berridale adamellite had two distinct sources including a significant I-type magma contribution. Complex morphology and Hf isotope variations in zircon grains indicate a moderate contribution from a crustal component in the genesis of the I-type Dundee rhyodacite. The integration of data on morphology, trace elements and Hf isotope variations in zircon populations provides a tool for the detailed analysis of the evolution of individual igneous rocks; it offers new insights into the contributions of different source rocks and the importance of magma mixing in granite petrogenesis. Such information is rarely obtainable from the analysis of bulk rocks.
KEY WORDS: granite source origins; zircon Hf isotopes; zircon petrogenesis; zircon morphology; zircon U–Pb ages
* Corresponding author. Telephone: 61 2 9850 6126. Fax: 61 2 9850 8943. E-mail: ebelouso{at}els.mq.edu.au
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  M.-F. Chu, K.-L. Wang, W. L. Griffin, S.-L. Chung, S. Y. O'Reilly, N. J. Pearson, and Y. Iizuka Apatite Composition: Tracing Petrogenetic Processes in Transhimalayan Granitoids J. Petrology, October 1, 2009; 50(10): 1829 - 1855. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Erdmann, R. A. Jamieson, and M. A. MacDonald Evaluating the Origin of Garnet, Cordierite, and Biotite in Granitic Rocks: a Case Study from the South Mountain Batholith, Nova Scotia J. Petrology, August 1, 2009; 50(8): 1477 - 1503. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. R. N. Rosa, A. A. Finch, T. Andersen, and C. M. C Inverno U-Pb geochronology of felsic volcanic rocks hosted in the Gafo Formation, South Portuguese Zone: the relationship with Iberian Pyrite Belt magmatism Mineralogical Magazine, March 23, 2009; 72(5): 1103 - 1118. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. Andersen, U. B. Andersson, S. Graham, G. Aberg, and S. L. Simonsen Granitic magmatism by melting of juvenile continental crust: new constraints on the source of Palaeoproterozoic granitoids in Fennoscandia from Hf isotopes in zircon Journal of the Geological Society, March 1, 2009; 166(2): 233 - 247. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J.-H. Yang, F.-Y. Wu, S. A. Wilde, E. Belousova, and W. L. Griffin Mesozoic decratonization of the North China block Geology, June 1, 2008; 36(6): 467 - 470. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T.S. ROhr, T. Andersen, and H. Dypvik Provenance of Lower Cretaceous sediments in the Wandel Sea Basin, North Greenland Journal of the Geological Society, May 1, 2008; 165(3): 755 - 767. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J.-H. Yang, F.-Y. Wu, S. A. Wilde, F. Chen, X.-M. Liu, and L.-W. Xie Petrogenesis of an Alkali Syenite-Granite-Rhyolite Suite in the Yanshan Fold and Thrust Belt, Eastern North China Craton: Geochronological, Geochemical and Nd-Sr-Hf Isotopic Evidence for Lithospheric Thinning J. Petrology, February 1, 2008; 49(2): 315 - 351. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C.B. Grimes, B.E. John, P.B. Kelemen, F.K. Mazdab, J.L. Wooden, M.J. Cheadle, K. Hanghoj, and J.J. Schwartz Trace element chemistry of zircons from oceanic crust: A method for distinguishing detrital zircon provenance Geology, July 1, 2007; 35(7): 643 - 646. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C. Perez-Soba, C. Villaseca, J. G. Del Tanago, and L. Nasdala THE COMPOSITION OF ZIRCON IN THE PERALUMINOUS HERCYNIAN GRANITES OF THE SPANISH CENTRAL SYSTEM BATHOLITH Can Mineral, June 1, 2007; 45(3): 509 - 527. [Abstract] [Full Text] [PDF]
|
|