Generation of granites and continental growth in eastern Australia: A detailed analysis of compositional variation in the 'I-type' Siluro-Devonian Bega Batholith, New South Wales

Jack Stirling

doi:10.26182/7h8b-6430

Generation of granites and continental growth in eastern Australia: A detailed analysis of compositional variation in the 'I-type' Siluro-Devonian Bega Batholith, New South Wales

Jack Stirling

Research output: Thesis › Doctoral Thesis

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Abstract

The thesis provides a detailed analysis of the compositional asymmetry of the I-type Siluro-Devonian Bega Batholith of New South Wales, Australia. An integrated geochemical and isotopic approach reveals that the systematic compositional changes across the Bega Batholith can be attributed to two-component magma mixing between mantle-derived and crustal melts in a progressively developing continental back-arc basin. This differential mixing of two components, and addition of new material from the mantle, indicates that the formation of the Bega Batholith was related to crustal growth processes, requiring a re-evaluation of global continental growth curves over the Phanerozoic.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Kemp, Tony, Supervisor Denyszyn, Steven, Supervisor McCulloch, Malcolm, Supervisor
Thesis sponsors	Australian Government Research Training Program
Award date	28 Aug 2022
DOIs	https://doi.org/10.26182/7h8b-6430
Publication status	Unpublished - 2022

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10.26182/7h8b-6430

THESIS - DOCTOR OF PHILOSOPHY - STIRLING, Jack Edward - 2022
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1 Article

U-Pb geochronology of the Silurian-Devonian Bega Batholith, south-eastern Australia: Insights into the origin and development of I-type granites
Stirling, J. E., Kemp, A. I. S. & Denyszyn, S. W., Nov 2022, In: Gondwana Research. 111, p. 1-19 19 p.
Research output: Contribution to journal › Article › peer-review
4 Citations (Scopus)

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title = "Generation of granites and continental growth in eastern Australia: A detailed analysis of compositional variation in the 'I-type' Siluro-Devonian Bega Batholith, New South Wales",

abstract = "The thesis provides a detailed analysis of the compositional asymmetry of the I-type Siluro-Devonian Bega Batholith of New South Wales, Australia. An integrated geochemical and isotopic approach reveals that the systematic compositional changes across the Bega Batholith can be attributed to two-component magma mixing between mantle-derived and crustal melts in a progressively developing continental back-arc basin. This differential mixing of two components, and addition of new material from the mantle, indicates that the formation of the Bega Batholith was related to crustal growth processes, requiring a re-evaluation of global continental growth curves over the Phanerozoic.",

keywords = "Magma Mixing, Crustal Growth, Bega Batholith, I-type granite, Lachlan Fold Belt, Isotopes, Geochronology, Zircon",

author = "Jack Stirling",

year = "2022",

doi = "10.26182/7h8b-6430",

language = "English",

school = "The University of Western Australia",

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AU - Stirling, Jack

PY - 2022

Y1 - 2022

N2 - The thesis provides a detailed analysis of the compositional asymmetry of the I-type Siluro-Devonian Bega Batholith of New South Wales, Australia. An integrated geochemical and isotopic approach reveals that the systematic compositional changes across the Bega Batholith can be attributed to two-component magma mixing between mantle-derived and crustal melts in a progressively developing continental back-arc basin. This differential mixing of two components, and addition of new material from the mantle, indicates that the formation of the Bega Batholith was related to crustal growth processes, requiring a re-evaluation of global continental growth curves over the Phanerozoic.

AB - The thesis provides a detailed analysis of the compositional asymmetry of the I-type Siluro-Devonian Bega Batholith of New South Wales, Australia. An integrated geochemical and isotopic approach reveals that the systematic compositional changes across the Bega Batholith can be attributed to two-component magma mixing between mantle-derived and crustal melts in a progressively developing continental back-arc basin. This differential mixing of two components, and addition of new material from the mantle, indicates that the formation of the Bega Batholith was related to crustal growth processes, requiring a re-evaluation of global continental growth curves over the Phanerozoic.

KW - Magma Mixing

KW - Crustal Growth

KW - Bega Batholith

KW - I-type granite

KW - Lachlan Fold Belt

KW - Isotopes

KW - Geochronology

KW - Zircon

U2 - 10.26182/7h8b-6430

DO - 10.26182/7h8b-6430

M3 - Doctoral Thesis

ER -

Generation of granites and continental growth in eastern Australia: A detailed analysis of compositional variation in the 'I-type' Siluro-Devonian Bega Batholith, New South Wales

Abstract

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Research output

U-Pb geochronology of the Silurian-Devonian Bega Batholith, south-eastern Australia: Insights into the origin and development of I-type granites

Cite this