Geochemical and crystallographic characterization of molluscs from Western Australia and their potential use as environmental proxies

Liza Mary Roger

doi:10.4225/23/59debaa6a46f6

Geochemical and crystallographic characterization of molluscs from Western Australia and their potential use as environmental proxies

Liza Mary Roger

School of Earth and Oceans

Research output: Thesis › Doctoral Thesis

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Abstract

This study focused on crystallographic and geochemical characterisation of four species of molluscs from Western Australia (WA) to investigate the role of biological, chemical and environmental processes in controlling shell growth and their potential as proxy records for environmental reconstructions. Three discrete investigations using bivalves and gastropods used multimodal imaging and analytical approach. Results reveal the complexity of molluscan shell crystallographic and elemental composition. Crystallographic characterisation reveals the structural record of thermal stress in Tridacna noae ( from
subtropical WA), however, in all studies the biological effects hinder the potential for development of proxy-based environmental reconstructions.

Original language	English
Qualification	Doctor of Philosophy
Supervisors/Advisors	George, Annette, Supervisor Shaw, Jeremy, Supervisor
Thesis sponsors	Australian Government Research Training Program
Award date	4 Oct 2017
DOIs	https://doi.org/10.4225/23/59debaa6a46f6
Publication status	Unpublished - 2017

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THESIS - DOCTOR OF PHILOSOPHY - ROGER Liza Mary - 2017
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Cite this

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keywords = "Mollusc, Crystallography, Trace element, Aragonite, Western Australia, Geochemistry, Stable isotope, Calcite",

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AB - This study focused on crystallographic and geochemical characterisation of four species of molluscs from Western Australia (WA) to investigate the role of biological, chemical and environmental processes in controlling shell growth and their potential as proxy records for environmental reconstructions. Three discrete investigations using bivalves and gastropods used multimodal imaging and analytical approach. Results reveal the complexity of molluscan shell crystallographic and elemental composition. Crystallographic characterisation reveals the structural record of thermal stress in Tridacna noae ( fromsubtropical WA), however, in all studies the biological effects hinder the potential for development of proxy-based environmental reconstructions.

KW - Mollusc

KW - Crystallography

KW - Trace element

KW - Aragonite

KW - Western Australia

KW - Geochemistry

KW - Stable isotope

KW - Calcite

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M3 - Doctoral Thesis

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Geochemical and crystallographic characterization of molluscs from Western Australia and their potential use as environmental proxies

Abstract

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