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Morphology, trace elements, and geochronology of zircons from monzogranite in the Northeast Xing’an Block, northeastern China: constraints on the genesis of the host magma
Changzhou Deng;  Guangyi Sun;  Deyou Sun;  Jinsheng Han;  Dongguang Yang;  Zongyuan Tang
2019
Source PublicationMineralogy and Petrology
Volume113Issue:5Pages:651-666
Abstract

The morphology, trace-element composition and geochronology of 43 zircon grains from two monzogranite samples from the Northeast Xing’an Block, northeastern China, were determined using cathodoluminescence imaging and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). Three morphological subtypes (S3, S8 and S9) are recognized in the zircon grain samples, and subtype S8 is dominant, reflecting a calc-alkaline, moderately aluminous, high-pressure crystallization medium and a crystallization temperature of 700 ± 50 °C. The zircon grains are characterized by oscillatory zoning, relatively high Th/U ratios (0.3–1.0), steep chondrite-normalized rare-earth element patterns, high Hf contents (>9000 ppm), positive Ce (Ce/Ce* = 4.84 to 2914) and negative Eu (Eu/Eu* = 0.24 to 0.90) anomalies, indicating a magmatic source. The 206Pb/238U ages of the two monzogranite samples are 180 ± 1 and 181 ± 1 Ma, respectively, implying an Early Jurassic emplacement age for the intrusion. The disparate geochemical behaviors of Hf, Th, and Nb within the zircons, as well as the U/Yb, Nb/Yb, Th/U, Nb/Hf, Th/Nb, and Hf/Th ratios, suggest a continental-crust source in a compressional-magmatic-arc or orogenic-tectonic setting, and a calc-alkaline parent magma. All of the grains show relatively high Ce4+/Ce3+ ratios, suggesting that they were derived from an oxidized magma, which favors enrichment of Cu-Mo elements in the granite porphyry.

KeywordZircon morphology u–pb Age geochemistry monzogranite
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10837
Collection环境地球化学国家重点实验室
Affiliation1.College of Earth Sciences, Jilin University, Changchun 130061, China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
3.Key Laboratory of Mineral Resources Evaluation in Northeast Asia, Ministry of Land and Resources, Changchun 130061, China
4.Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, China
Recommended Citation
GB/T 7714
Changzhou Deng;Guangyi Sun;Deyou Sun;Jinsheng Han;Dongguang Yang;Zongyuan Tang. Morphology, trace elements, and geochronology of zircons from monzogranite in the Northeast Xing’an Block, northeastern China: constraints on the genesis of the host magma[J]. Mineralogy and Petrology,2019,113(5):651-666.
APA Changzhou Deng;Guangyi Sun;Deyou Sun;Jinsheng Han;Dongguang Yang;Zongyuan Tang.(2019).Morphology, trace elements, and geochronology of zircons from monzogranite in the Northeast Xing’an Block, northeastern China: constraints on the genesis of the host magma.Mineralogy and Petrology,113(5),651-666.
MLA Changzhou Deng;Guangyi Sun;Deyou Sun;Jinsheng Han;Dongguang Yang;Zongyuan Tang."Morphology, trace elements, and geochronology of zircons from monzogranite in the Northeast Xing’an Block, northeastern China: constraints on the genesis of the host magma".Mineralogy and Petrology 113.5(2019):651-666.
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