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  2. 地质与地球物理研究所
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  4. 岩石圈演化国家重点实验室
Apatite as a magma redox indicator and its application in metallogenic research

文献类型：期刊论文

作者Wang, Hairuo2,5; Cai, Keda2,5; Sun, Min1; Xia, Xiao-Ping6; Lai, Chun-Kit4; Li, Pengfei6; Wan, Bo3; Zhang, Zhiyong3
刊名LITHOS
出版日期2022-08-01
卷号422页码:16
ISSN号0024-4937
关键词Apatite Oxygen fugacity Tectonic setting Metallogenic potential Western Tianshan Orogen
DOI10.1016/j.lithos.2022.106749
英文摘要As an early crystallizing phase in the magma, apatite can accommodate a wide range of multivalent cations and has a capacity resistant to weathering and hydrothermal alteration. These features enable apatite to record the primary redox state of precursor magma. Here, we present new electron probe microanalysis (EPMA) and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) geochemical data on apatite and zircon grains from the epithermal gold ore-hosting Dahalajunshan Formation volcanics in the Tulasu basin (Western Tianshan Orogen, Central Asia). Calculated zircon Ce-/Ti-based oxybarometric results and sulfur content of apatite suggest that the parental magma of the volcanics was relatively oxidized. Furthermore, we compiled a regional apatite chemical dataset to assess whether other elements (Mn, V, Eu, Ce, As and Ga) in apatite can serve as a magma redox proxy. Negative correlation between apatite Mn and whole-rock MgO is evident, implying the control of magma fractionation on apatite Mn contents. Also, oxygen fugacity (fO2) calculated by Mn-in-apatite oxybarometer correlates strongly with magma fractionation, which indicates that fractional crystallization (instead of fO(2)) controlled the Mn-uptake in apatite. The apatite As budget is sensitive to fO(2) variation but does not show any correlation with the ratio of nonbridging oxygens to tetrahedral cations (NBO/T), whole-rock SiO2, or aluminum saturation index. In contrast, apatite V and Ga contents correlate obviously with whole-rock SiO2 and NBO/T but not fO(2), and apatite Eu and Ce anomalies show no correlation with fO(2). Therefore, we conclude that only the apatite As and S contents can reflect the magma redox state. The calculated fO2 of the Dahalajunshan Formation volcanic rocks is delta FMQ+0.53 & PLUSMN; 0.52 (based on the fayalite+magnetite+quartz buffer), which is markedly lower than those of typical porphyry Cu ore-forming magmas worldwide. Thus, from the perspective of magma fO2, regional magma is inferred to have little potential to form the porphyry Cu deposit.
WOS关键词PORPHYRY COPPER-DEPOSITS ; TRACE-ELEMENT ; OXIDATION-STATE ; OXYGEN FUGACITY ; PARTITION-COEFFICIENTS ; BASALTIC GLASSES ; MELT ; ZIRCON ; SOLUBILITY ; SATURATION
资助项目National Natural Science Foundation of China[41872082] ; National Natural Science Foundation of China[41622205] ; Hong Kong Research Grants Council[17302317] ; Hong Kong Research Grants Council[17303415] ; fundamental research funds for the Central Universities[2652018116] ; fundamental research funds for the Central Universities[2652018135]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER
WOS记录号WOS:000807569000002
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Hong Kong Research Grants Council ; Hong Kong Research Grants Council ; fundamental research funds for the Central Universities ; fundamental research funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Hong Kong Research Grants Council ; Hong Kong Research Grants Council ; fundamental research funds for the Central Universities ; fundamental research funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Hong Kong Research Grants Council ; Hong Kong Research Grants Council ; fundamental research funds for the Central Universities ; fundamental research funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Hong Kong Research Grants Council ; Hong Kong Research Grants Council ; fundamental research funds for the Central Universities ; fundamental research funds for the Central Universities
源URL[http://ir.iggcas.ac.cn/handle/132A11/105991]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Cai, Keda
作者单位1.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China
2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Univ Brunei Darussalam, Fac Sci, BE1410, Gadong, Brunei Darussal
5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Hairuo,Cai, Keda,Sun, Min,et al. Apatite as a magma redox indicator and its application in metallogenic research[J]. LITHOS,2022,422:16.
APA Wang, Hairuo.,Cai, Keda.,Sun, Min.,Xia, Xiao-Ping.,Lai, Chun-Kit.,...&Zhang, Zhiyong.(2022).Apatite as a magma redox indicator and its application in metallogenic research.LITHOS,422,16.
MLA Wang, Hairuo,et al."Apatite as a magma redox indicator and its application in metallogenic research".LITHOS 422(2022):16.

入库方式： OAI收割

来源：地质与地球物理研究所

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