Open Apatite Sr Isotopic System in Low-Temperature Hydrous Regimes
dc.contributor.author | Cao, Mingjian | |
dc.contributor.author | Evans, Noreen | |
dc.contributor.author | Qin, K. | |
dc.contributor.author | Danišík, Martin | |
dc.contributor.author | Li, G. | |
dc.contributor.author | McInnes, Brent | |
dc.date.accessioned | 2023-03-09T07:58:46Z | |
dc.date.available | 2023-03-09T07:58:46Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Cao, 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.uri | http://hdl.handle.net/20.500.11937/90784 | |
dc.identifier.doi | 10.1029/2019JB018085 | |
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.language | English | |
dc.publisher | AMER GEOPHYSICAL UNION | |
dc.relation.sponsoredby | http://purl.org/au-research/grants/arc/DP160102427 | |
dc.subject | Science & Technology | |
dc.subject | Physical Sciences | |
dc.subject | Geochemistry & Geophysics | |
dc.subject | in situ apatite Sr-Nd isotopes | |
dc.subject | LA-MC-ICPMS | |
dc.subject | zircon (U-Th) | |
dc.subject | He dating | |
dc.subject | apatite metasomatic alteration | |
dc.subject | low-temperature hydrous condition | |
dc.subject | Baogutu porphyry Cu deposit | |
dc.subject | PORPHYRY CU DEPOSIT | |
dc.subject | RARE-EARTH-ELEMENTS | |
dc.subject | I-TYPE GRANITOIDS | |
dc.subject | WESTERN JUNGGAR | |
dc.subject | TRACE-ELEMENT | |
dc.subject | U-PB | |
dc.subject | DISSOLUTION-REPRECIPITATION | |
dc.subject | HYDROTHERMAL TRANSPORT | |
dc.subject | CHINA CONSTRAINTS | |
dc.subject | BAOGUTU | |
dc.title | Open Apatite Sr Isotopic System in Low-Temperature Hydrous Regimes | |
dc.type | Journal Article | |
dcterms.source.volume | 124 | |
dcterms.source.number | 11 | |
dcterms.source.startPage | 11192 | |
dcterms.source.endPage | 11203 | |
dcterms.source.issn | 2169-9313 | |
dcterms.source.title | Journal of Geophysical Research: Solid Earth | |
dc.date.updated | 2023-03-09T07:58:46Z | |
curtin.department | John de Laeter Centre (JdLC) | |
curtin.department | School of Earth and Planetary Sciences (EPS) | |
curtin.accessStatus | Open access via publisher | |
curtin.faculty | Faculty of Science and Engineering | |
curtin.contributor.orcid | McInnes, Brent [0000-0002-2776-0574] | |
curtin.contributor.orcid | Evans, Noreen [0000-0002-7615-8328] | |
curtin.contributor.orcid | Danisik, Martin [0000-0002-0885-4938] | |
curtin.contributor.researcherid | McInnes, Brent [B-7408-2013] | |
curtin.contributor.researcherid | Cao, Mingjian [M-9588-2016] | |
curtin.contributor.researcherid | Evans, Noreen [C-3275-2013] | |
dcterms.source.eissn | 2169-9356 | |
curtin.contributor.scopusauthorid | McInnes, Brent [7005882577] | |
curtin.contributor.scopusauthorid | Cao, Mingjian [35067870000] | |
curtin.contributor.scopusauthorid | Evans, Noreen [7401559218] | |
curtin.contributor.scopusauthorid | Danišík, Martin [12239479000] |
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