Magmatism of Shatsky Rise controlled by plume-ridge interaction

Zhang, Xubo1; Brown, Eric L.2; Zhang, Jinchang1; Lin, Jian1,3,4; Bao, Xiyuan5; Sager, William W.6

2023-10-01

10.1038/s41561-023-01286-0

NATURE GEOSCIENCE   Impact Factor & Quartile

1752-0894

1752-0908

["Shatsky Rise is a large oceanic plateau formed at a spreading ridge triple junction, but its origin mechanism is unclear. Voluminous magmatism at Shatsky Rise has been regarded either as the product of decompression melting of fertile recycled material in a divergent plate boundary setting (plate model) or a hot mantle plume head (plume model). Here we use thermodynamic models to simulate decompression melting of heterogeneous mantle sources. We provide constraints on both mantle potential temperature and fertile source abundance under seafloor spreading and plume-ridge interaction scenarios. As constrained by crustal thickness and lava chemical compositions, a seafloor spreading origin requires mantle potential temperatures of 1,490-1,585 degrees C, which are unreasonably high for mid-ocean ridge systems far from hotspots. In contrast, the plume-ridge interaction model can explain observations with mantle potential temperatures of 1,470-1,515 degrees C for the buoyant plume and upwelling rates up to six times the rate of plate separation during the formation of the main massifs. Fertile recycled material comprises less than 7% of the mantle source, and predicted melt fractions are consistent with independent estimates. We thus suggest that Shatsky Rise magmatism is best explained by plume-ridge interaction-a combination of the plume and plate models.","Thermodynamic simulations suggest that Shatsky Rise magmatism is controlled by the interaction between mantle plume and mid-ocean ridge."]

SCI

English

NI Journal Papers

Corresponding

Chinese Academy of Sciences[2021B1515020098] ; Natural Science Foundation for Distinguished Young Scholars of Guangdong Province["41890813","42206070","42376071"] ; National Natural Science Foundation of China[421QN381] ; Hainan Provincial Natural Science Foundation of China[202201010221] ; Science and Technology Program of Guangzhou["131551KYSB20200021","133244KYSB20180029","Y4SL021"] ; Chinese Academy of Sciences Project["JCYJ20220818100417038","KCXFZ20211020174803005"] ; Shenzhen Science and Technology Innovation Commission[8021-00202B] ; Danmarks Frie Forskningsfond (FNU)[OCE1832197]

Geology

Geosciences, Multidisciplinary

WOS:001078781600009

NATURE PORTFOLIO

Web of Science

1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou, Peoples R China
2.Aarhus Univ, Dept Geosci, Aarhus, Denmark
3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
4.China Pakistan Joint Res Ctr Earth Sci CAS HEC, Islamabad, Pakistan
5.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA
6.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX USA

Zhang, Xubo,Brown, Eric L.,Zhang, Jinchang,et al. Magmatism of Shatsky Rise controlled by plume-ridge interaction[J]. NATURE GEOSCIENCE,2023.

Zhang, Xubo,Brown, Eric L.,Zhang, Jinchang,Lin, Jian,Bao, Xiyuan,&Sager, William W..(2023).Magmatism of Shatsky Rise controlled by plume-ridge interaction.NATURE GEOSCIENCE.

Zhang, Xubo,et al."Magmatism of Shatsky Rise controlled by plume-ridge interaction".NATURE GEOSCIENCE (2023).