{"id":{"repo_id":"anu","oai_identifier":"oai:openresearch-repository.anu.edu.au:1885/125140"},"canonical_url":"https://search.dev.ndltd.org/etd/anu/oai:openresearch-repository.anu.edu.au:1885/125140","repository":{"repo_id":"anu","name":"Australian National University","base_url":"https://openresearch-repository.anu.edu.au/server/oai/request"},"display":{"title":"In situ mineral geochemistry as a guide to ore-forming processes","abstract":"Isotopic and trace element analyses are essential to our understanding ore-forming processes, but traditionally these techniques have required bulk digestion of rocks and minerals. Recent advances in in situ microanalytical techniques permit us to analyse samples on a mineral-by mineral basis and probe the chemistry of individual growth bands in minerals, providing a near-continuous record in any zoned mineral. This thesis is composed of five studies using the in situ geochemistry of 'gangue' (non-ore) minerals to elucidate cryptic ore-forming processes that are obscured using conventional analyses. The first half of this thesis presents coupled isotopic and trace element analyses in quartz and pyrite from magmatic-hydrothermal Cu-Au deposits. These studies revealed complex chemical zonation, providing a detailed record of cryptic fluid chemistry and depositional processes. A distinct isotopic signature and residual metastable silica hydrates in quartz microcrystals from the El Indio deposit, Chile provided the first evidence for silica maturation in a high-temperature environment and the first evidence for non-equilibrium isotope fractionation in quartz. The second half of this thesis focuses on the trace element chemistry of minerals from the Bellevue Core, a ~3 km drillcore intersecting the upper half of the Bushveld Complex, South Africa - the largest known repository of platinum-group elements (PGEs). These studies revealed a prospective PGE horizon and provide the first evidence for extensive equilibration of plagioclase in cumulate rocks.","abstract_html":"Isotopic and trace element analyses are essential to our understanding ore-forming processes, but traditionally these techniques have required bulk digestion of rocks and minerals. Recent advances in in situ microanalytical techniques permit us to analyse samples on a mineral-by mineral basis and probe the chemistry of individual growth bands in minerals, providing a near-continuous record in any zoned mineral. This thesis is composed of five studies using the in situ geochemistry of 'gangue' (non-ore) minerals to elucidate cryptic ore-forming processes that are obscured using conventional analyses. The first half of this thesis presents coupled isotopic and trace element analyses in quartz and pyrite from magmatic-hydrothermal Cu-Au deposits. These studies revealed complex chemical zonation, providing a detailed record of cryptic fluid chemistry and depositional processes. A distinct isotopic signature and residual metastable silica hydrates in quartz microcrystals from the El Indio deposit, Chile provided the first evidence for silica maturation in a high-temperature environment and the first evidence for non-equilibrium isotope fractionation in quartz. The second half of this thesis focuses on the trace element chemistry of minerals from the Bellevue Core, a ~3 km drillcore intersecting the upper half of the Bushveld Complex, South Africa - the largest known repository of platinum-group elements (PGEs). These studies revealed a prospective PGE horizon and provide the first evidence for extensive equilibration of plagioclase in cumulate rocks.","abstract_has_math":false,"creators":["Tanner, Dominique"],"institution":"Canberra, ACT : The Australian National University","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014","date_published":"2014","updated_at":"2026-07-24T00:54:59Z","subjects":[],"languages":["en_AU"],"rights":["Author retains copyright"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["b3579072"],"render_values":[{"text":"b3579072","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/1885/125140","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Tanner, Dominique"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2017-09-01T03:21:15Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2017-09-01T03:21:15Z"]},{"key":"dc:date.issued","label":"Date","values":["2014"]},{"key":"dc:publisher","label":"Institution","values":["Canberra, ACT : The Australian National University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis (PhD)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_AU"]},{"key":"dc:rights","label":"Dc Rights","values":["Author retains copyright"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["b3579072"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1885/125140"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Isotopic and trace element analyses are essential to our understanding ore-forming processes, but traditionally these techniques have required bulk digestion of rocks and minerals. Recent advances in in situ microanalytical techniques permit us to analyse samples on a mineral-by mineral basis and probe the chemistry of individual growth bands in minerals, providing a near-continuous record in any zoned mineral. This thesis is composed of five studies using the in situ geochemistry of 'gangue' (non-ore) minerals to elucidate cryptic ore-forming processes that are obscured using conventional analyses. The first half of this thesis presents coupled isotopic and trace element analyses in quartz and pyrite from magmatic-hydrothermal Cu-Au deposits. These studies revealed complex chemical zonation, providing a detailed record of cryptic fluid chemistry and depositional processes. A distinct isotopic signature and residual metastable silica hydrates in quartz microcrystals from the El Indio deposit, Chile provided the first evidence for silica maturation in a high-temperature environment and the first evidence for non-equilibrium isotope fractionation in quartz. The second half of this thesis focuses on the trace element chemistry of minerals from the Bellevue Core, a ~3 km drillcore intersecting the upper half of the Bushveld Complex, South Africa - the largest known repository of platinum-group elements (PGEs). These studies revealed a prospective PGE horizon and provide the first evidence for extensive equilibration of plagioclase in cumulate rocks."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["In situ mineral geochemistry as a guide to ore-forming processes"]}]}],"canonical_facts":{"dc:creator":["Tanner, Dominique"],"dc:date.accessioned":["2017-09-01T03:21:15Z"],"dc:date.available":["2017-09-01T03:21:15Z"],"dc:date.issued":["2014"],"dc:description.abstract":["Isotopic and trace element analyses are essential to our understanding ore-forming processes, but traditionally these techniques have required bulk digestion of rocks and minerals. Recent advances in in situ microanalytical techniques permit us to analyse samples on a mineral-by mineral basis and probe the chemistry of individual growth bands in minerals, providing a near-continuous record in any zoned mineral. This thesis is composed of five studies using the in situ geochemistry of 'gangue' (non-ore) minerals to elucidate cryptic ore-forming processes that are obscured using conventional analyses. The first half of this thesis presents coupled isotopic and trace element analyses in quartz and pyrite from magmatic-hydrothermal Cu-Au deposits. These studies revealed complex chemical zonation, providing a detailed record of cryptic fluid chemistry and depositional processes. A distinct isotopic signature and residual metastable silica hydrates in quartz microcrystals from the El Indio deposit, Chile provided the first evidence for silica maturation in a high-temperature environment and the first evidence for non-equilibrium isotope fractionation in quartz. The second half of this thesis focuses on the trace element chemistry of minerals from the Bellevue Core, a ~3 km drillcore intersecting the upper half of the Bushveld Complex, South Africa - the largest known repository of platinum-group elements (PGEs). These studies revealed a prospective PGE horizon and provide the first evidence for extensive equilibration of plagioclase in cumulate rocks."],"dc:format.mimetype":["application/pdf"],"dc:identifier.other":["b3579072"],"dc:identifier.uri":["http://hdl.handle.net/1885/125140"],"dc:language.iso":["en_AU"],"dc:publisher":["Canberra, ACT : The Australian National University"],"dc:rights":["Author retains copyright"],"dc:title":["In situ mineral geochemistry as a guide to ore-forming processes"],"dc:type":["Thesis (PhD)"]},"updated_at":"2026-07-24T00:54:59Z"}