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Apatite trace element and halogen compositions as petrogenetic-metallogenic indicators: Examples from four granite plutons in the Sanjiang region, SW China
Li-Chuan Pan; Rui-Zhong Hu; Xin-Song Wang; Xian-Wu Bi; Jing-Jing Zhu; Chus iLi
Corresponding AuthorRui-Zhong Hu
2016
Source PublicationLithos
Volume254Issue:1Pages:118-130
Abstract

The abundances of trace elements including Sr, Ga and rare earth elements (REE) and halogens in apatite crystals from four intermediate-felsic plutons in the Zhongdian terrane in the Sanjiang region have been determined using electron microprobe and laser ablation inductively coupled plasma mass spectrometry to evaluate the potential of apatite as a petrogenic-metallogenic indicator. The selected plutons include one that is not mineralized (the Triassic Xiuwacu pluton, or the TXWC pluton), one that hosts a porphyry-type Cu deposit (the Pulang pluton, or the PL pluton), one that hosts a porphyry-type Mo deposit (the Tongchanggou pluton, or the TCG pluton), and one that hosts a vein-type Mo deposit (the Cretaceous Xiuwacu pluton, or the CXWC pluton). Except for the CXWC pluton, the other three plutons have adakite-like trace element signatures in whole rocks. The results from this study show that REE, Sr and halogens in apatite can be used to track magma compositions, oxidation states and crystallization history. Apatite crystals from the adakite-like plutons are characterized by much higher Sr/Y and delta Eu than the non-adakite-type pluton. This means that apatite, which is not susceptible to alteration, is a useful tool for identifying the adakite-like plutons that no longer preserve the initial Sr/Y ratios in whole rocks due to weathering and hydrothermal alteration. Based on apatite Ga contents and delta Eu values, it is inferred that the parental magmas for the two adakite-like plutons containing porphyry-type Cu and Mo mineralization are more oxidized than that for the non-adakite-type pluton containing vein-type Mo mineralization. Apatite crystals from the vein-type Mo deposit have much lower Cl/F ratios than those from the porphyry-type Cu and Mo deposits. Apatite crystals from the adakite-like pluton without Cu or Mo mineralization is characterized by much lower Cl/F ratios than those from the adakite-like plutons that host the porphyry-type Cu and Mo deposits. The results from this study confirm the apatite is a useful petrogenetic indicator as well as mineral exploration tool.

KeywordApatite Ree Halogens Oxidation State Adakite Ore Genesis
Subject Area矿床地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/6490
Collection矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
Corresponding AuthorRui-Zhong Hu
Recommended Citation
GB/T 7714
Li-Chuan Pan,Rui-Zhong Hu,Xin-Song Wang,et al. Apatite trace element and halogen compositions as petrogenetic-metallogenic indicators: Examples from four granite plutons in the Sanjiang region, SW China[J]. Lithos,2016,254(1):118-130.
APA Li-Chuan Pan,Rui-Zhong Hu,Xin-Song Wang,Xian-Wu Bi,Jing-Jing Zhu,&Chus iLi.(2016).Apatite trace element and halogen compositions as petrogenetic-metallogenic indicators: Examples from four granite plutons in the Sanjiang region, SW China.Lithos,254(1),118-130.
MLA Li-Chuan Pan,et al."Apatite trace element and halogen compositions as petrogenetic-metallogenic indicators: Examples from four granite plutons in the Sanjiang region, SW China".Lithos 254.1(2016):118-130.
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