| An overview on the origin of adakites/adakitic rocks and related porphyry Cu-Au mineralization, Northern Luzon, Philippines | |
| Deng, Jianghong1,2,3,4; Yang, Xiaoyong4; Zhang, Li-peng1,2,3; Duan, Liuan5; Mastoi, Abdul Shakoor4,6; Liu, He1,2,3 | |
| 2020-09-01 | |
| 发表期刊 | ORE GEOLOGY REVIEWS
 |
| ISSN | 0169-1368 |
| 卷号 | 124页码:23 |
| 通讯作者 | Yang, Xiaoyong([email protected]) |
| 摘要 | The Philippine island arc is famous for the widely developed large porphyry and epithermal Cu-Au deposits and associated Cenozoic adakites/adakitic rocks. Northern Luzon is one of the most Cu-Au enriched areas in the Philippines, which develops Late-Oligocene to Pleistocene porphyry and epithermal Cu-Au deposits in the Central Cordillera Range and southernmost of Cagayan Valley Basin. In this paper, Cenozoic magmatic events and geological characteristics of typical porphyry and epithermal Cu-Au deposits in Northern Luzon have been overviewed and briefly summarized. Geochemical data of the mineralized or unmineralized igneous rocks from three period of magma events in the area have been revisited, to investigate the different geneses and reveal the connections to Cu-Au mineralization. The Pliocene-Pleistocene Cu-Au deposits in the Baguio and Mankayan districts of Central Cordillera are mostly related to dioritic to dacitic porphyries. These rocks are intermediate to felsic in compositions, displaying specific geochemical features of "transitional" adakite to typical adakite. They were probably generated by partial melting of the flat-subducted Scarborough Ridge beneath the Luzon Arc at quite shallow depths and low pressures. They also underwent a certain degree of apatite +/- ilmenite fractionation during magma evolution. The slab-melting genesis of these Pliocene-Pleistocene porphyries gives rise to the intense Cu-Au mineralization in the Central Cordillera. The Late Oligocene Dinkidi alkalic porphyry Cu-Au deposit in the Didipio area, southernmost Cagayan Valley Basin is directly related to the highly evolved Dinkidi monzonite-syenite stock, which also shows adakitic geochemical features. However, it was not directly derived from slab melting, but generated by combination fractional crystallization of hornblende + apatite +/- clinopyroxene +/- titanite from an alkalic basaltic magma. The basaltic magma was probably produced by partial melting of a melt-metasomatized mantle in a backarc rift setting caused by slab rollback of the subducted South China Sea plate in the Late Oligocene. Slab melt metasomatism in the primary source of the Dinkidi stock combined with late stage Cu-Au enrichment during magma evolution at high oxygen fugacities facilitates the porphyry Cu-Au mineralization in the Dinkidi deposit. The Early Miocene Central Cordillera Diorite Complex (also called Ango Batholith) in the Central Cordillera range shows clear fractionation of hornblende +/- clinopyroxene, evolving geochemically from non-adakitic basaltic magma to adakitic granodioritic magma. There is no noteworthy porphyry or epithermal Cu-Au deposit related to the Central Cordillera Diorite Complex, mostly because they are primarily derived from a less enriched mantle source metasomatized by limited slab fluids. The initial lack of Cu-Au in the primary source of the Central Cordillera Diorite Complex prevents further Cu-Au mineralization of the complex, although they have undergone high degree evolution. |
| 关键词 | Adakite Porphyry Cu-Au deposit Epithermal Au deposit Ridge subduction Slab melting Fractional crystallization |
| DOI | 10.1016/j.oregeorev.2020.103610 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41673040]; National Natural Science Foundation of China[41803002]; National Natural Science Foundation of China[91328204]; National Natural Science Foundation of China[41373007]; National Key R&D Program of China[2016YFC0600404]; China Postdoctoral Science Foundation[2018 M642708]; Fundamental Research Funds for the Central Universities |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| WOS类目 | Geology ; Mineralogy ; Mining & Mineral Processing |
| WOS记录号 | WOS:000564289600003 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/168445 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Yang, Xiaoyong |
| 作者单位 | 1.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 4.Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 5.China Geol Survey, Yantai Geol Survey Ctr Coastal Zone, Yantai 264004, Peoples R China 6.Univ Sindh, Ctr Pure & Appl Geol, Jamshoro 76080, Pakistan |
| 推荐引用方式 GB/T 7714 | Deng, Jianghong,Yang, Xiaoyong,Zhang, Li-peng,et al. An overview on the origin of adakites/adakitic rocks and related porphyry Cu-Au mineralization, Northern Luzon, Philippines[J]. ORE GEOLOGY REVIEWS,2020,124:23. |
| APA | Deng, Jianghong,Yang, Xiaoyong,Zhang, Li-peng,Duan, Liuan,Mastoi, Abdul Shakoor,&Liu, He.(2020).An overview on the origin of adakites/adakitic rocks and related porphyry Cu-Au mineralization, Northern Luzon, Philippines.ORE GEOLOGY REVIEWS,124,23. |
| MLA | Deng, Jianghong,et al."An overview on the origin of adakites/adakitic rocks and related porphyry Cu-Au mineralization, Northern Luzon, Philippines".ORE GEOLOGY REVIEWS 124(2020):23. |
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