IOCAS-IR  > 海洋地质与环境重点实验室
Origin of Cu in the PACMANUS hydrothermal field from the eastern Manus back-arc basin: evidence from mass balance modeling
Ma, Yao1,2; Wang, Xiaoyuan1,2; Chen, Shuai1,2; Yin, Xuebo1; Zhu, Bowen1,3; Guo, Kun1,2,4; Zeng, Zhigang1,2,3
2019-09-01
Source PublicationACTA OCEANOLOGICA SINICA
ISSN0253-505X
Volume38Issue:9Pages:59-70
Corresponding AuthorMa, Yao(mayao@qdio.ac.cn)
AbstractHydrothermal precipitates associated with active vents in the eastern Manus Basin, an actively opening back-arc basin in the Bismarck Sea, Papua New Guinea, are among the most Cu-rich on the modern seafloor. The volcanic rocks associated with this mineralization may be insufficiently enriched in Cu to account for the Cu content of the sulfides by simple leaching. The PACMANUS hydrothermal field lies in the eastern portion of the eastern Manus Basin. Mass balance modeling of the PACMANUS hydrothermal system indicates that simple leaching of a stationary reaction zone (0.144 km(3)) by hydrothermal fluids cannot yield the Cu found in associated sulfide deposits because unacceptably high leaching, transportation and precipitation efficiencies are required to derive the Cu in sulfides by leaching processes. With 100% leaching, transport and precipitating efficiency, 0.166 km(3) of volcanic rocks would need to be leached to account for the Cu budget of hydrothermal sulfide deposits. The key requirement for forming metal-rich magmatic fluids is a large amount of metals available to enter the exsolved vapor phase. Magmas generated in the eastern Manus Basin inherently have high fO(2) because of metasomatism of the mantle source by oxidized materials from the subducted slab, leading to copper enrichment in the magma chamber. Moreover, the presence of Cu in gas-rich melt inclusi on bubbles in Pual Ridge andesite is evidence that degassing and partitioning of Cu into the magmatic volatile phase has occurred in the eastern Manus Basin. Numerical mass balance modeling indicates that approximately 0.236 Mt Cu was potentially transferred to the hydrothermal system per cubic kilometer magma. Magmatic degassing seems to play a more significant role than leaching.
Keywordback-arc basin mass balance model PACMANUS hydrothermal field source of Cu
DOI10.1007/s13131-019-1475-z
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41706052] ; National Natural Science Foundation of China[41476044] ; National Natural Science Foundation of China[41325021] ; National Program on Global Change and Air-Sea Interaction[GASI-GEOGE-02] ; National Basic Research Program (973 Program) of China[2013CB429700] ; International Partnership Program of Chinese Academy of Sciences[133137KYSB20170003] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11030302] ; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061] ; National Special Fund for the 13th Five Year Plan of COMRA[DY135-G2-1-02] ; AoShan Talents Program - Qingdao National Laboratory for Marine Science and Technology[2015ASTP-0S17] ; Innovative Talent Promotion Program[2012RA2191] ; Science and Technology Development Program of Shandong Province[2013GRC31502] ; Scientific and Technological Innovation Project - Qingdao National Laboratory for Marine Science and Technology[2015ASKJ03] ; National High Level Talent Special Support Program ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Qingdao Collaborative Innovation Center of Marine Science and Technology
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000485996200006
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/162990
Collection海洋地质与环境重点实验室
Corresponding AuthorMa, Yao
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China
2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266071, Shandong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Pilot Natl Lab Marine Sci & Technol, Ocean Sci Isotope & Geochronol Ctr, Qingdao 266071, Shandong, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ma, Yao,Wang, Xiaoyuan,Chen, Shuai,et al. Origin of Cu in the PACMANUS hydrothermal field from the eastern Manus back-arc basin: evidence from mass balance modeling[J]. ACTA OCEANOLOGICA SINICA,2019,38(9):59-70.
APA Ma, Yao.,Wang, Xiaoyuan.,Chen, Shuai.,Yin, Xuebo.,Zhu, Bowen.,...&Zeng, Zhigang.(2019).Origin of Cu in the PACMANUS hydrothermal field from the eastern Manus back-arc basin: evidence from mass balance modeling.ACTA OCEANOLOGICA SINICA,38(9),59-70.
MLA Ma, Yao,et al."Origin of Cu in the PACMANUS hydrothermal field from the eastern Manus back-arc basin: evidence from mass balance modeling".ACTA OCEANOLOGICA SINICA 38.9(2019):59-70.
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