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dc.contributor.authorCao, Mingjian
dc.contributor.authorEvans, Noreen
dc.contributor.authorQin, K.
dc.contributor.authorDanišík, Martin
dc.contributor.authorLi, G.
dc.contributor.authorMcInnes, Brent
dc.date.accessioned2023-03-09T07:58:46Z
dc.date.available2023-03-09T07:58:46Z
dc.date.issued2019
dc.identifier.citationCao, M. and Evans, N.J. and Qin, K. and Danišík, M. and Li, G. and McInnes, B.I.A. 2019. Open Apatite Sr Isotopic System in Low-Temperature Hydrous Regimes. Journal of Geophysical Research: Solid Earth. 124 (11): pp. 11192-11203.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/90784
dc.identifier.doi10.1029/2019JB018085
dc.description.abstract

Single crystal in situ Sr and Nd isotopic analysis of apatite permits more accurate interrogation of a variety of geoscience questions, including provenance, petrogenesis, and ore system evolution. However, the degree to which the apatite Sr and Nd isotopic systems remain closed under extended low-temperature hydrous conditions is not well constrained. Granitoids at the Baogutu deposit in NW China contain veins of low-temperature H2O-rich epistilbite and thus provide an excellent opportunity to evaluate isotopic system integrity under low-temperature hydrous conditions. Apatite from the Late Carboniferous diorite and granodiorite porphyry show variable (87Sr/86Sr)i ratios (0.7042 to 0.7062) but restricted εNd(t) values (+7.0±0.4 and +6.5±0.4, 1σ). The apatite Sr isotope signatures are transitional between whole rock (0.7035) and vein epistilbite (~0.7062), indicating apparent incorporation of radiogenic Sr from the epistilbite-related hydrothermal fluid into the igneous apatite, whereas εNd values closely match those of the whole rock (+6.9±0.2 and +6.5±0.2, 1σ) and epistilbite (+6.2±0.2, 1σ). Obvious metasomatic textures of apatite were revealed by cathodoluminescence images. The 260 to 300°C formation temperatures for earlier quartz-sulfide veins and chlorite alteration and homogenization temperature (~190°C) of fluid inclusions in epistilbite-calcite vein calcite constrain the temperature of the later epistilbite-related hydrothermal fluid to 190 to 260°C. These results indicate that Sr and likely Nd isotopes in apatite are mobile under low-temperature (<300°C) hydrous conditions and implies that Rb-Sr signatures in apatite from hydrothermally altered rocks reveal the presence and characteristics of modifying fluids.

dc.languageEnglish
dc.publisherAMER GEOPHYSICAL UNION
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DP160102427
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectGeochemistry & Geophysics
dc.subjectin situ apatite Sr-Nd isotopes
dc.subjectLA-MC-ICPMS
dc.subjectzircon (U-Th)
dc.subjectHe dating
dc.subjectapatite metasomatic alteration
dc.subjectlow-temperature hydrous condition
dc.subjectBaogutu porphyry Cu deposit
dc.subjectPORPHYRY CU DEPOSIT
dc.subjectRARE-EARTH-ELEMENTS
dc.subjectI-TYPE GRANITOIDS
dc.subjectWESTERN JUNGGAR
dc.subjectTRACE-ELEMENT
dc.subjectU-PB
dc.subjectDISSOLUTION-REPRECIPITATION
dc.subjectHYDROTHERMAL TRANSPORT
dc.subjectCHINA CONSTRAINTS
dc.subjectBAOGUTU
dc.titleOpen Apatite Sr Isotopic System in Low-Temperature Hydrous Regimes
dc.typeJournal Article
dcterms.source.volume124
dcterms.source.number11
dcterms.source.startPage11192
dcterms.source.endPage11203
dcterms.source.issn2169-9313
dcterms.source.titleJournal of Geophysical Research: Solid Earth
dc.date.updated2023-03-09T07:58:46Z
curtin.departmentJohn de Laeter Centre (JdLC)
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.accessStatusOpen access via publisher
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidMcInnes, Brent [0000-0002-2776-0574]
curtin.contributor.orcidEvans, Noreen [0000-0002-7615-8328]
curtin.contributor.orcidDanisik, Martin [0000-0002-0885-4938]
curtin.contributor.researcheridMcInnes, Brent [B-7408-2013]
curtin.contributor.researcheridCao, Mingjian [M-9588-2016]
curtin.contributor.researcheridEvans, Noreen [C-3275-2013]
dcterms.source.eissn2169-9356
curtin.contributor.scopusauthoridMcInnes, Brent [7005882577]
curtin.contributor.scopusauthoridCao, Mingjian [35067870000]
curtin.contributor.scopusauthoridEvans, Noreen [7401559218]
curtin.contributor.scopusauthoridDanišík, Martin [12239479000]


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