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Mineralization, Geochemistry and Zircon U-Pb Ages of the Paodaoling Porphyry Gold Deposit in the Guichi Region, Lower Yangtze Metallogenic Belt, Eastern China
Duan Liu'an1,2,3; Yang Xiaoyong1; Deng Jianghong1,4,5; Wang Fangyue6; Insung, Lee7
2018-04-01
Source PublicationACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN1000-9515
Volume92Issue:2Pages:706-732
Corresponding AuthorYang Xiaoyong(xyyang555@163.com) ; Deng Jianghong()
AbstractThe newly discovered Paodaoling porphyry Au deposit from the Guichi region, Lower Yangtze River Metallogenic Belt (LYRB), contains >35 tons of Au at an average grade of similar to 1.7 g/t. It is a porphyry 'Au-only' deposit, as revealed by current exploration in the depths, mostly above -400 m, which is quite uncommon among coeval porphyry mineralization along the LYRB. Additionally, there are also Cu-Au bearing porphyries and barren alkaline granitoids in the Paodaoling district. Zircon LA-ICP-MS U-Pb dating of the Cu-Au-bearing porphyries yield an age of 141-140 Ma, falling within the main magmatic stage of the LYRB, whereas the barren granites give an age of 125-120 Ma, coeval with the regional A-type granites. The Cu-Au-bearing porphyries are LILE-, LREE-enriched and HFSE-depleted, typical of arc magmatic affinities. The barren granites are HFSE-enriched, with lower LREE/HREE ratios and pronounced negative Eu anomalies. The Cu-Au-bearing porphyries in the Paodaoling district have high oxygen fugacities and high water content. Pyrite sulfur isotopes of the Paodaoling gold deposit indicate a magmatic-sedimentary mixed source for the ore-forming fluids. Based on the alteration and poly-metal zonation of the deepest exploration drill hole from the Paodaoling Au deposit, we propose that Cu ore bodies could lie at depth beneath the current Au ore bodies. The magmatism and associated Cu-Au mineralization of the Paodaoling district are likely to have formed in a subduction setting, during slab rollback of the paleo-Pacific plate.
Keywordzircon U-Pb dating porphyry Au deposit Lower Yangtze River metallogenic belt (LYRB) Paodaoling paleo-Pacific plate subduction
DOI10.1111/1755-6724.13550
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0600404] ; National Natural Science Foundation of China[41673040] ; National Natural Science Foundation of China[41611540339] ; Project of National Land Resource Science and Technology of Anhui Province[2014-K-4]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000437257000016
PublisherWILEY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/163514
Collection深海极端环境与生命过程研究中心
Corresponding AuthorYang Xiaoyong; Deng Jianghong
Affiliation1.Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.7 Gold Geol Party Chinese Peoples Armed Police Fo, Yantai 264004, Shandong, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Shandong, Peoples R China
5.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, Shandong, Peoples R China
6.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China
7.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 151742, South Korea
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Duan Liu'an,Yang Xiaoyong,Deng Jianghong,et al. Mineralization, Geochemistry and Zircon U-Pb Ages of the Paodaoling Porphyry Gold Deposit in the Guichi Region, Lower Yangtze Metallogenic Belt, Eastern China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2018,92(2):706-732.
APA Duan Liu'an,Yang Xiaoyong,Deng Jianghong,Wang Fangyue,&Insung, Lee.(2018).Mineralization, Geochemistry and Zircon U-Pb Ages of the Paodaoling Porphyry Gold Deposit in the Guichi Region, Lower Yangtze Metallogenic Belt, Eastern China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,92(2),706-732.
MLA Duan Liu'an,et al."Mineralization, Geochemistry and Zircon U-Pb Ages of the Paodaoling Porphyry Gold Deposit in the Guichi Region, Lower Yangtze Metallogenic Belt, Eastern China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 92.2(2018):706-732.
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