Collaborative Research: Early Tertiary Tectonic Evolution of the Pacific-Australia-Antarctic Plate Circuit

在Balleny断裂带以东的东南印度脊部分，有一个显著的失配，范围在50到250公里之间，磁异常13、18和20。该项目将调查南塔斯曼海、翡翠盆地和罗斯海海湾北部的关键板块边界和相关磁异常，这将更好地约束该板块的运动历史。收集到的数据将用于验证这样一种假设：洋脊的南极一侧是一个独立的板块，附属于玛丽伯德地，这些异常现象间接表明，在异常24到13次之间，东南极洲和西南极洲之间发生了运动。调查将在塔斯曼海的R/ M尤因号和罗斯海海湾以北的R/V N B帕尔默号上进行。* * *

9416779 Stock There is a significant misfit, ranging from 50 to 250 kms, of magnetic anomalies 13, 18, and 20 along the section of the Southeast Indian Ridge east of the Balleny fracture zone. This project will survey the critical plate boundaries and relevant magnetic anomalies in the South Tasman Sea, Emerald Basin and north of the Ross Sea embayment that will better constrain the history of the this plate motion. Data collected will be used to test the hypothesis that the Antarctic side of the ridge acted as a separate plate, attached to Marie Byrd Land, and that these anomalies indirectly indicate motion between East and West Antarctica between anomalies 24 and 13 time. Surveys will be conducted on the R/V W M Ewing in the Tasman Sea, and on the R/V N B Palmer north of the Ross Sea embayment. ***