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	Determining the impact of magma water contents on porphyry Cu fertility: Constraints from hydrous and nominally anhydrous mineral analyses
	Huang, Wenting; Xia, Xiao-Ping; Sun, Xiaoming; Cui, Zexian; Liuyun, Ouyang; Zhang, Jian; Chen, Xilian; Zheng, Yi; Liang, Huaying
发表日期	2024
ISSN	0016-7606
EISSN	1943-2674
起始页码	136
结束页码	1-2
卷号	136 期号:1-2
英文摘要	Most large-scale porphyry -style mineralization is genetically associated with oxidized, sulfur -rich, and hydrous magmas, the sources of which were enriched in mantlederived or juvenile crust-derived materials. Geochemical indices for these features can distinguish fertile magmas and barren magmas. However, fertile magmas that generate different -sized porphyry deposits are usually geochemically indistinguishable, and the factors controlling the size of porphyry mineralization are poorly understood. Here, we used zircon H2O contents and the compositions of apatite hosted in zircon, phenocrysts, and groundmass to compare the water contents and volatile evolution of fertile magmas in the Yulong ore belt, Tibet, which generated giant-, large-, and medium-sized porphyry deposits. We found that these porphyries have comparable major- and trace -element and zircon Hf-O isotope compositions, with high oxygen fugacity and sulfur contents. A negative correlation between X- Ap (Cl)/ X-Ap (OH) versus of apatites suggests that the magmas Cl Ap consistently achieved H2O saturation before zircon crystallization, and zircon hydroxyl contents reveal that the water contents of the melt positively correlate with the size of the deposits, consistent with larger deposits achieving H2O saturation at deeper crustal levels. The deeper H2O saturation also caused larger amounts of Cl extraction, as indicated by the trends of increasing XAp X F/ and deCl Ap creasing X- Ap (Cl) X-Ap (OH) with larger deposit sizes. Ap These data sets can be reconciled by magmas forming larger deposits having higher H2O contents and suggest that the H2O content is a key control on their fertility. Our study highlights the utility of integrated hydrous and nominally anhydrous mineral analyses for constraining enigmatic magmatic volatile processes in magmatic ore -forming systems.
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001172946200001
来源期刊	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301732
作者单位	Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Trinity College Dublin; Chinese Academy of Sciences; Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Sun Yat Sen University; Nanning Normal University; East China University of Technology
推荐引用方式 GB/T 7714	Huang, Wenting,Xia, Xiao-Ping,Sun, Xiaoming,et al. Determining the impact of magma water contents on porphyry Cu fertility: Constraints from hydrous and nominally anhydrous mineral analyses[J],2024,136(1-2).
APA	Huang, Wenting.,Xia, Xiao-Ping.,Sun, Xiaoming.,Cui, Zexian.,Liuyun, Ouyang.,...&Liang, Huaying.(2024).Determining the impact of magma water contents on porphyry Cu fertility: Constraints from hydrous and nominally anhydrous mineral analyses.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,136(1-2).
MLA	Huang, Wenting,et al."Determining the impact of magma water contents on porphyry Cu fertility: Constraints from hydrous and nominally anhydrous mineral analyses".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 136.1-2(2024).