The Relationship between Gabbros and Granites in the Lachlan Fold Belt: An example from Arte River, East Gippsland

Joanne Whelan; Janet Hergt; Jon Woodhead

doi:10.1071/ASEG2006ab192

ISSN: 2202-0586
E-ISSN:

oa The Relationship between Gabbros and Granites in the Lachlan Fold Belt: An example from Arte River, East Gippsland
Authors Joanne Whelan^a, Janet Hergt^b and Jon Woodhead^c
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^a School of Earth SciencesThe University of Melbourne, Parkville, , Victoria, [email protected] ^b School of Earth SciencesThe University of Melbourne, Parkville, , Victoria, [email protected] ^c School of Earth SciencesThe University of Melbourne, Parkville, , Victoria, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2006, Issue ASEG2006 - 18th Geophysical Conference, Dec 2006, p. 1 - 3
DOI: https://doi.org/10.1071/ASEG2006ab192
- Published online: 01 Dec 2006

Abstract

The Arte River Gabbroic Complex is located in eastern Victoria within the Kuark Metamorphic Belt. It is spatially associated with a number of I-type granites, the A-type Murrungowar adamellite and the Scrubby Flat Gabbroic intrusion located further to the north. These are hornblende orthopyroxene gabbros, with two samples containing titanaugite.

Geochemical analyses reveal two distinct magma types in the Arte Gabbroic complex an alkali component, evident in the pyroxene mineralogy, and a tholeiitic component. The complex is associated with a small tonalite/diorite lens with complex but sharp boundaries between the two. Sr-Nd isotope studies reveal two evolutionary arrays, one between this lens and the alkali component and the other between the thoeleiitic and the Scrubby Flat Gabbro located to the north-west of the main Arte River gabbro intrusion.

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References

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Article Type: Research Article

Keyword(s): Arte Gabbroic Complex; magma mixing; Sr-Nd isotopes; U-Pb geochronology

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