A multi-technique evaluation of hydrothermal hematite U-Pb isotope systematics: Implications for ore deposit geochronology 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Chemical geology
年/卷/期
2019 / 513 /
页码
54-72
ISSN号
0009-2541
作者单位
Univ Adelaide, Sch Chem Engn, Adelaide, SA 5005, Australia;British Geol Survey, NIGL, Nottingham NG12 5GG, England;Univ Adelaide, Sch Chem Engn, Adelaide, SA 5005, Australia;Univ Adelaide, Sch Chem Engn, Adelaide, SA 5005, Australia;Univ Adelaide, Sch Chem Engn, Adelaide, SA 5005, Australia;BHP Olymp Dam, Adelaide, SA 5000, Australia;Curtin Univ Technol, John de Laeter Ctr, Bentley, WA 6102, Australia;Univ Adelaide, Adelaide Microscopy, Adelaide, SA 5005, Australia;British Geol Survey, NIGL, Nottingham NG12 5GG, England;Univ Adelaide, Adelaide Microscopy, Adelaide, SA 5005, Australia;
作者
Courtney-Davies, Liam;Tapster, Simon R.;Ciobanu, Cristiana L.;Cook, Nigel J.;Verdugo-Ihl, Max R.;Ehrig, Kathy J.;Kennedy, Allen K.;Gilbert, Sarah E.;Condon, Daniel J.;Wade, Benjamin P.;
摘要
Hematite (alpha-Fe2O3) is a common iron-oxide mineral known to incorporate U into its crystal lattice at up to wt% concentrations and has been previously used to date ore formation within iron-oxide copper gold and banded iron formation deposits. However, there has been no detailed evaluation of the potential challenges this novel mineral geochronometer may present for accurate temporal interpretation. We report a multi-technique U-Pb geochronological study comprising laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), sensitive high-resolution ion microprobe (SHRIMP) and the first isotope dilution-thermal ionization mass spectrometry (ID-TIMS) procedure and analyses using an in-situ grain micro-sampling technique. We assess intra- and inter-sample data reproducibility, and examine the compatibility of spatial and analytical resolutions to texturally and compositionally diverse samples.
机翻摘要
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关键词/主题词
Hematite;U-Pb;Micro-sampled ID-TIMS;LA-ICP-MS mapping;Geochronology;Olympic Dam;IOCG;
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