Skip to main content
padlock icon - secure page this page is secure

A new precise date for the Tolmie Igneous Complex in northeastern Victoria

Buy Article:

$60.00 + tax (Refund Policy)

Among the Devonian igneous complexes of central and northeastern Victoria, the S-type Tolmie Igneous Complex (TIC) occupies a unique spatial position, astride the Governor Fault and the Mount Wellington Greenstone Belt, a probable terrane boundary, and also bridges the boundary between the Strathbogie and Tabberabbera granite provinces. This stitching position makes it important to determine the nature of the crustal source involved in its genesis. Here we present a new U–Pb zircon age for a sample of the Toombullup Ignimbrite, which forms a large part of the TIC. This age (377 ± 2 Ma) allows us to comment far more reliably on the initial Sr and Nd isotope ratios of the TIC magmas. The corrected data (initial 87Sr/86Sr = 0.70804 to 0.71085, εNdt = –0.08 to 0.44) confirm a heterogeneous sediment-dominated protolith, but unlike those of other S-type granitic and felsic volcanic rocks of the region, one composed of materials that had not long previously been extracted from the mantle. This finding has importance in the context of future models for the geological and tectonic development of this part of southeastern Australia.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: Australia; Late Devonian; Tolmie Igneous Complex; Toombullup Ignimbrite; U–Pb dating; Victoria; rhyolite; zircon

Document Type: Research Article

Affiliations: 1: Department of Earth Sciences, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa 2: Department of Materials Engineering and Physics, University of Salzburg, Salzburg, Austria

Publication date: October 3, 2014

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more