Ultrahigh-pressure mantle metasomatism in continental collision zones recorded by post-collisional mafic rocks
文献类型：期刊论文
| 作者 | Gao, Mingdi1,2,3,4; Xu, Haijin4; Foley, Stephen F.3; Zhang, Junfeng4; Wang, Yu1,2 |
| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 135期号:11-12页码:3066-3082 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B36610.1 |
| 英文摘要 | Post-collisional mafic magmas are melts of mixed sources formed by the interaction between crust and mantle. We report the first identification of metasomatic sources formed at >200 km in continental collision zones that led to the Triassic post-collisional Shidao mafic magmas in the Sulu ultrahigh-pressure terrane, eastern China. The Shidao magmas are ultrapotassic with low Rb/K2O and Rb/Sr ratios, highlighting a major contribution of K-richterite to the melts, and with high Dy/ Yb ratios indicating residual garnet in the source. Experiments have demonstrated that K-richterite coexists with garnet only at pressures higher than 6-7 GPa, which indicates that the Yangtze continental crust was subducted to >200 km, where it interacted with the overlying mantle to produce K-richterite + garnet-bearing assemblages. This ultra-deep source of the Shidao magmas spotlights an alternative mechanism for the genesis of post-collisional magmas, which are generally of shallow origin. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001113269200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/75961]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Xu, Haijin |
| 作者单位 | 1.Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Macquarie Univ, Sch Nat Sci, N Ryde, NSW 2109, Australia 4.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Mingdi,Xu, Haijin,Foley, Stephen F.,et al. Ultrahigh-pressure mantle metasomatism in continental collision zones recorded by post-collisional mafic rocks[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2023,135(11-12):3066-3082. |
| APA | Gao, Mingdi,Xu, Haijin,Foley, Stephen F.,Zhang, Junfeng,&Wang, Yu.(2023).Ultrahigh-pressure mantle metasomatism in continental collision zones recorded by post-collisional mafic rocks.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,135(11-12),3066-3082. |
| MLA | Gao, Mingdi,et al."Ultrahigh-pressure mantle metasomatism in continental collision zones recorded by post-collisional mafic rocks".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 135.11-12(2023):3066-3082. |
入库方式： OAI收割
来源：广州地球化学研究所
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