Modification of Along-Ridge Topography and Crustal Thickness by Mantle Plume and Oceanic Transform Fault at Ultra-Slow Spreading Mohns Ridge

Zhang，Yinuo1,2; Zhang，Fan1,3; Zhang，Xubo1,3; Zhang，Tao4; Lin，Jian1,3,5; Zhou，Zhiyuan5; Zhang，Jiangyang1,3

2023-12-16

10.1029/2023GL105871

Geophysical Research Letters   影响因子和分区

0094-8276

1944-8007

The mantle plumes modify geophysical and geochemical features along and across mid-ocean ridges. Despite abundant studies of plume-ridge interaction, few geodynamic studies focus on the Arctic Ocean. The Jan Mayen Hotspot is located at the southern end of the Mohns Ridge and offset by the Jan Mayen Transform Fault, which creates an ideal area to study plume-ridge-transform fault interaction at the ultra-slow spreading ridge. Through analyzing geophysical observations, we revealed that the M factor and crustal thickness decrease and the axial relief increases northeastward along the Mohns Ridge within a distance of ∼370 km to the Jan Mayen Hotspot. Combined with modeling results, the properties of the Jan Mayen plume were estimated, which has a diameter of 75 km, a temperature anomaly of 100°C, and a buoyancy flux of 0.22 Mg/s. Additionally, our model results indicate that the along-ridge dispersion of plume is slightly enhanced by the transform fault.

crustal thickness geodynamic modeling M factor mantle plume mid-ocean ridge transform fault

EI ; SCI

英语

NI论文

其他

20235015190047

Geodynamics ; Structural geology ; Submarine geology ; Thermal plumes

Oceanography, General:471.1 ; Geology:481.1 ; Geophysics:481.3 ; Materials Science:951

GEOSCIENCES

2-s2.0-85178900881

Scopus

1.Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou,China
2.University of Chinese Academy of Sciences,Beijing,China
3.China-Pakistan Joint Research Center on Earth Sciences,CAS-HEC,Islamabad,Pakistan
4.Key Laboratory of Submarine Geosciences,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou,China
5.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,China

Zhang，Yinuo,Zhang，Fan,Zhang，Xubo,et al. Modification of Along-Ridge Topography and Crustal Thickness by Mantle Plume and Oceanic Transform Fault at Ultra-Slow Spreading Mohns Ridge[J]. Geophysical Research Letters,2023,50(23).

Zhang，Yinuo.,Zhang，Fan.,Zhang，Xubo.,Zhang，Tao.,Lin，Jian.,...&Zhang，Jiangyang.(2023).Modification of Along-Ridge Topography and Crustal Thickness by Mantle Plume and Oceanic Transform Fault at Ultra-Slow Spreading Mohns Ridge.Geophysical Research Letters,50(23).

Zhang，Yinuo,et al."Modification of Along-Ridge Topography and Crustal Thickness by Mantle Plume and Oceanic Transform Fault at Ultra-Slow Spreading Mohns Ridge".Geophysical Research Letters 50.23(2023).