| GUO Dong-xu,LIU Yan,LI Zi-jing,SUN Dong-xun,WANG Hao.Determination of Trace Element Compositions of Altered Minerals in Fenitization Veins by Inductively Coupled Plasma-Mass Spectrometry[J].Rock and Mineral Analysis,2020,39(6):896-907 |
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| Determination of Trace Element Compositions of Altered Minerals in Fenitization Veins by Inductively Coupled Plasma-Mass Spectrometry |
| Received:April 30, 2020 Revised:July 07, 2020 |
| DOI：10.15898/j.cnki.11-2131/td.202005060003 |
| Key words: Maoniuping|fenitization|alteration|trace elements|aegirine-augite|arfvedsonite |
| Author Name | Affiliation | E-mail | | GUO Dong-xu | Core and Samples Center of Land and Resources, China Geological Survey, Sanhe 065201, China | ly@cags.ac.cn | | LIU Yan | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China | | | LI Zi-jing | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China | | | SUN Dong-xun | Core and Samples Center of Land and Resources, China Geological Survey, Sanhe 065201, China | | | WANG Hao | Core and Samples Center of Land and Resources, China Geological Survey, Sanhe 065201, China | |
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| Abstract: |
BACKGROUND: In recent years, whole-rock inductively coupled plasma-mass spectrometry (ICP-MS) trace and in situ laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) trace element analyses have been increasingly more widely used in the field of earth sciences. Fenitization is a common type of alteration in carbonate-type rare earth deposits, but the relationship between the trace element characteristics of altered minerals and rare earth mineralization is not clear.
OBJECTIVES: To better understand the relationship between fenitization and REE mineralization in the Maoniuping deposit as well as to provide references for prospecting carbonate-related (including alkaline rock) REE deposits.
METHODS: Trace elements for aegirine-augite and arfvedsonite in different stages of fenitization veins (ore-bearing or barren rocks) from the Maoniuping deposit, Dagudao area were analyzed by ICP-MS and LA-ICP-MS.
RESULTS: In situ trace elements of aegirine-augite in different stages of fenitization veins showed that La/Nd (0.19-0.23), LREE/HREE (6.58-7.79), Ce/Nd (0.95-1.11), (La)N/(Yb)N (2.07-2.33) values of aegirine-augite in ore-bearing veins were higher than those of barren veins.
CONCLUSIONS: Compared with whole rock trace elements, high contents of La, Ce, LREE, ΣREE in mineral veins, strong differentiation of light and heavy rare earths may represent fenitization-related fluid with high rare earth flux. The occurrence of fenitization veins and the whole-rock trace and in situ trace geochemical indicators of aegirine-augite in veins may provide references for the prospecting and exploration of carbonate-type rare earth deposits. |
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