Zircon trace elements and magma fertility: insights from porphyry (-skarn) Mo deposits in NE China
| Autor: | Huaying Wu, Yong Zhang, Xinlu Hu, Pin Wang, Cheng Zhang, Yong Lai, Qihai Shu, Degao Zhai, Zhaoshan Chang |
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| Rok vydání: | 2019 |
| Předmět: |
Mineralization (geology)
010504 meteorology & atmospheric sciences Geochemistry Trace element Skarn 010502 geochemistry & geophysics 01 natural sciences Mineral resource classification Intrusion Geophysics Geochemistry and Petrology Oxidation state Economic Geology Geology 0105 earth and related environmental sciences Zircon |
| Zdroj: | Mineralium Deposita. 54:645-656 |
| ISSN: | 1432-1866 0026-4598 |
| Popis: | It has been widely accepted that magmas genetically linked to porphyry (-skarn) Cu (Mo) deposits are commonly oxidized. Recently, using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) techniques, zircon Ce4+/Ce3+, CeN/CeN*, EuN/EuN*, and Ce/Nd ratios, and magma ΔFMQ values (departure from the fayalite–magnetite–quartz oxygen buffer) based on zircon trace element compositions, have been used as proxies to quantify magma oxidation state. Here we present the zircon trace element compositions of 13 Mesozoic porphyry (-skarn) Mo deposits in NE China of various sizes to examine the relationship between magma Mo fertility and magma oxidation state. Generally, the studied deposits with > 0.3 Mt Mo have Ce4+/Ce3+ > 100, CeN/CeN* > 100, Ce/Nd > 10, and EuN/EuN* > 0.3, whereas those containing 10 Mt Cu. The findings in this study can be used to evaluate an intrusion’s potential to produce Mo mineralization. |
| Databáze: | OpenAIRE |
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