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Article: Laser ablation ICP-MS titanite U-Th-Pb dating of hydrothermal ore deposits: A case study of the Tonglushan Cu-Fe-Au skarn deposit, SE Hubei Province, China
Title | Laser ablation ICP-MS titanite U-Th-Pb dating of hydrothermal ore deposits: A case study of the Tonglushan Cu-Fe-Au skarn deposit, SE Hubei Province, China | ||||||
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Authors | |||||||
Keywords | LA-ICP-MS Skarn ore deposit Titanite U-Th-Pb dating | ||||||
Issue Date | 2010 | ||||||
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo | ||||||
Citation | Chemical Geology, 2010, v. 270 n. 1-4, p. 56-67 How to Cite? | ||||||
Abstract | Titanite from the Tonglushan Cu-Fe-Au skarn deposit, Daye district, eastern China, has been successfully dated by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Hydrothermal titanite from both skarn ores and calcite veins cutting the ore bodies are characterized by having much lower REE and Th/U and Lu/Hf ratios compared to their magmatic equivalents from the ore-related Yangxin quartz diorite intrusion and a late-stage albitite dike. Titanite from the Yangxin quartz diorite and an albitite dike, which intrudes both the quartz diorite intrusion and ore bodies, yield weighted mean 206Pb/238U ages of 136.0 ± 1.5 Ma and 120.6 ± 2.3 Ma (2σ), respectively, in agreement within analytical uncertainty to their 208Pb/232Th ages. In situ analysis of epidote-enclosed hydrothermal titanite in thin sections of a skarn ore sample yields a mean 206Pb/238U age of 135.9 ± 1.3 Ma and 208Pb/232Th age of 138.2 ± 4.5 Ma, whereas titanite in calcite from a calcite-dominated vein cross-cutting the skarn ore body has consistent 206Pb/238U and 208Pb/232Th ages of ca. 121 Ma. The data thus reveal two independent hydrothermal events. The earlier event was responsible for the known Cu-Fe-Au skarn mineralization at Tonglushan and throughout the Daye district, and was caused by coeval magmatism that has resulted in the emplacement of the Yangxin quartz diorite. The later event, previously unrecognized, was associated with a second magmatic pulse as represented by the albitite dikes, and provides potential for discovering new mineral deposits at Tonglushan and possibly over the Daye district. This study represents the first direct dating of skarn deposits using titanite U-Th-Pb geochronometer and signifies the utilization of titanite for precise dating of hydrothermal ore formation. © 2009 Elsevier B.V. All rights reserved. | ||||||
Persistent Identifier | http://hdl.handle.net/10722/124648 | ||||||
ISSN | 2023 Impact Factor: 3.6 2023 SCImago Journal Rankings: 1.506 | ||||||
ISI Accession Number ID |
Funding Information: Research work is jointly supported by the NSFC grants 90814004, 40821061, and 40334037 and the 111 Project (B107039). Ms. Zhang Su-Xin and Mr. Zheng Shu are thanked for their expert assistance during the SEM and EMP analysis, respectively. Dr. Richard J Goldfarb read an earlier draft of the paper and provided many useful comments, which are greatly acknowledged. Comments by Drs. Antonio Simonetti and Khin Zaw have been important in improving the final presentation of this work. Our thanks are also due to Prof. Roberta Rudnick, editor of Chemical Geology, for her useful suggestions in our revision. | ||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Li, JW | en_HK |
dc.contributor.author | Deng, XD | en_HK |
dc.contributor.author | Zhou, MF | en_HK |
dc.contributor.author | Liu, YS | en_HK |
dc.contributor.author | Zhao, XF | en_HK |
dc.contributor.author | Guo, JL | en_HK |
dc.date.accessioned | 2010-10-31T10:46:19Z | - |
dc.date.available | 2010-10-31T10:46:19Z | - |
dc.date.issued | 2010 | en_HK |
dc.identifier.citation | Chemical Geology, 2010, v. 270 n. 1-4, p. 56-67 | en_HK |
dc.identifier.issn | 0009-2541 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/124648 | - |
dc.description.abstract | Titanite from the Tonglushan Cu-Fe-Au skarn deposit, Daye district, eastern China, has been successfully dated by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Hydrothermal titanite from both skarn ores and calcite veins cutting the ore bodies are characterized by having much lower REE and Th/U and Lu/Hf ratios compared to their magmatic equivalents from the ore-related Yangxin quartz diorite intrusion and a late-stage albitite dike. Titanite from the Yangxin quartz diorite and an albitite dike, which intrudes both the quartz diorite intrusion and ore bodies, yield weighted mean 206Pb/238U ages of 136.0 ± 1.5 Ma and 120.6 ± 2.3 Ma (2σ), respectively, in agreement within analytical uncertainty to their 208Pb/232Th ages. In situ analysis of epidote-enclosed hydrothermal titanite in thin sections of a skarn ore sample yields a mean 206Pb/238U age of 135.9 ± 1.3 Ma and 208Pb/232Th age of 138.2 ± 4.5 Ma, whereas titanite in calcite from a calcite-dominated vein cross-cutting the skarn ore body has consistent 206Pb/238U and 208Pb/232Th ages of ca. 121 Ma. The data thus reveal two independent hydrothermal events. The earlier event was responsible for the known Cu-Fe-Au skarn mineralization at Tonglushan and throughout the Daye district, and was caused by coeval magmatism that has resulted in the emplacement of the Yangxin quartz diorite. The later event, previously unrecognized, was associated with a second magmatic pulse as represented by the albitite dikes, and provides potential for discovering new mineral deposits at Tonglushan and possibly over the Daye district. This study represents the first direct dating of skarn deposits using titanite U-Th-Pb geochronometer and signifies the utilization of titanite for precise dating of hydrothermal ore formation. © 2009 Elsevier B.V. All rights reserved. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo | en_HK |
dc.relation.ispartof | Chemical Geology | en_HK |
dc.subject | LA-ICP-MS | en_HK |
dc.subject | Skarn ore deposit | en_HK |
dc.subject | Titanite | en_HK |
dc.subject | U-Th-Pb dating | en_HK |
dc.title | Laser ablation ICP-MS titanite U-Th-Pb dating of hydrothermal ore deposits: A case study of the Tonglushan Cu-Fe-Au skarn deposit, SE Hubei Province, China | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0009-2541&volume=270&issue=1-4&spage=56&epage=67&date=2010&atitle=Laser+ablation+ICP-MS+titanite+U-Th-Pb+dating+of+hydrothermal+ore+deposits:+A+case+study+of+the+Tonglushan+Cu-Fe-Au+skarn+deposit,+SE+Hubei+Province,+China | en_HK |
dc.identifier.email | Zhou, MF:mfzhou@hkucc.hku.hk | en_HK |
dc.identifier.authority | Zhou, MF=rp00844 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.chemgeo.2009.11.005 | en_HK |
dc.identifier.scopus | eid_2-s2.0-74449084834 | en_HK |
dc.identifier.hkuros | 181432 | en_HK |
dc.identifier.hkuros | 177766 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-74449084834&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 270 | en_HK |
dc.identifier.issue | 1-4 | en_HK |
dc.identifier.spage | 56 | en_HK |
dc.identifier.epage | 67 | en_HK |
dc.identifier.isi | WOS:000274989800006 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Li, JW=36067183300 | en_HK |
dc.identifier.scopusauthorid | Deng, XD=16042105200 | en_HK |
dc.identifier.scopusauthorid | Zhou, MF=7403506005 | en_HK |
dc.identifier.scopusauthorid | Liu, YS=35369015600 | en_HK |
dc.identifier.scopusauthorid | Zhao, XF=49061648300 | en_HK |
dc.identifier.scopusauthorid | Guo, JL=49261091500 | en_HK |
dc.identifier.citeulike | 6189155 | - |
dc.identifier.issnl | 0009-2541 | - |